Operation Manual 250W MF Radio Beacon Transmitter Model :
KMW-250RB
October , 2012
Hanjin Electronic Ind Co., Ltd
1. Safety Instructions
WARNING : Each and every part of the equipment is connected with high pressure current electric power. Therefore, operators should be careful not to be contacted with it with utmost care all the time.
◇ This part of manual describes general guidelines in handling the equipment of operators, who
understand the equipment as well as possible danger in handling electrical and electronic circuits.
However, safety cautions and warnings could not be covered by the manual, and not limited within the descriptions in the manual.
◇ The equipment should be installed, operated and maintained by only qualified engineers to
install, operate and service the equipment.
◇ The manufacturer, Hanjin Electronics Industry Co., Ltd., is not responsible for any damage to
personnel or the equipment when it is operated by unqualified personnel or by improper operating procedure.
◇ If you have questions for After Sales Service or something else, please contact us with the
details below.
Address
:
323-1 sangsu-ri
Nam-myun Yangju-si
Telephone :
+ 82-31- 867 - 0861, + 82-31-867 - 0863
+82-70-7169-3900
FAX
:
Web Site
: http://www.hanjinetc.co.kr
E-mail
:
[email protected]
Kyunggi-do KOREA
** CAUTION **
· Operators should follow Safety Instruction all the time.
Whenever operator likes
to open cover, door, panel or shielded parts, operator should disconnect power supply.
· Before doing maintenance work, first disconnect power supply, then discharge
electricity with grounding rod.
· Do not implement adjustment or maintenance work on the equipment alone or
under tired physical condition.
· When a disconnection of active circuitry is needed, preceeding works must be
implemented in advance to protect the circuit.
2. In Emergency
In emergency, disconnect Transmitter main switch immediately.
To recover from electric shock by Artificial Respiration If victim does not show consciousness, artificial respiration should be done as per following procedures.
Lay him on his back on flat floor or table carefully.
A.
Keep air passage open
When victim is unconscious, generally rolled back tongue interrupts respirations.
To keep air
passage open, the head tilted backward and chin pointing upward so that the tongue does not block the throat.
Put his head backward to make the throat open as per above illustration. Support his neck upward with hands. Press his forehead with hand. Remove something in his mouth by hands if necessary. Observe his respiration cycles.
B.
Artificial Respiration
When only one rescuer is available for recovering the patient. In this case, press victim's breast fifteen times and do mouth-to-mouth artificial respiration two times as one cycle per 15 seconds. If victim does not show good sign, repetitive cycles should be needed to have him 4 times breaths per one minute by 60 pressures per minute. And observe the victim carefully if he shows good signs with checking his pulses by hand. When two rescuers are available for recovering the patient. In this case, two rescuers set their position opposite face to face, in-between the victim.
One
should take position near from head to do artificial respirations two times while the other implements
breast pressure for 15 times within 15 seconds per cycle. If victim does not show good sign, repetitive cycles should be needed to have him 4 times breaths per one minute by 60 pressures per minute.
It is much better for the rescuer doing breast pressing to count loudly pressure times to let
the other know when he does artificial respirations.
C.
Pressure on breast
1) Position of rib bones It is easy to understand that the position is combined part of two rib bones. But exact position is about 4 cm upper part from combined part of right & left rib bones.
2) Breast pressure
80 times per minute
One rescuer : 15 times breast thrust and two times breath
60 times per minute
Two rescuers : 5 times breast thrust and one breath
< CAUTIONS > When second rescuer is blowing into the victim's mouth, nose, or both, the first rescuer must keep breast thrust with same intervals. 3)
Call medical doctor as soon as possible.
1)
If patient shows sensible response, ① Make his body warm. ② Make him comfortable in quiet atmosphere. ③ Loosen clothes. ④
Let him lean on something comfortably.
3.
Emergency Treatment
Each and every engineer doing installation works, operation, maintenance and servicing of this Transmitter equipment should familiarize himself with Emergency Treatment Procedures and Practices as well.
Following explanations are general and summarized ones for engineer's reference.
If necessary,
each and every engineer should refer to Medical Books concerned with Artificial Respirations as well as to Doctors.
< Treatment of Electrical Burns >
1.
Serious burns and damaged skin ①
Cover damaged skin with plain cloth or clothes.
②
Do not touch water blisters as they are and take off clothes carefully from skin.
③
(At this time, do not use medical ointments.) If necessary, give the victim shock medical treatment.
④
Transport the victim to hospital as soon as possible.
⑤ If arms or legs are damaged, raise them a little.
** CAUTIONS AND WARNING ** If professional help is not available within one hour while victim is conscious without vomit, feed him salt & soda solutions.
TABLE OF CONTENTS Section 1.
GENERAL
---------
1
1.1 :
Introduction
---------
2
1.2 :
Composition
---------
2
1.3 :
Test Data
---------
2-1
---------
3
---------
4
---------
5
Section 2. 2.1 :
INSTALLATION
Installation
Section 3.
OPERATION
3.1 :
Operating Procedures
---------
6
3.2 :
RF Amplifier Unit
( KMW-250RB-PA )
---------
7
3.3 :
Antenna Change Unit
( KMW-250RB-CU )
---------
10
3.4 :
Remote Control Unit
( KMW-250RB-RCU )
---------
10
---------
11
Section 4.
COMPOSITION OF CIRCUITS
4.1 :
RF Drive PCB ( DDS OSC )
---------
12
4.2 :
Modulator Driver PCB
---------
24
4.3 :
RF Amplifier ( 250W )
---------
46
4.4 :
MF Radio Beacon Control PCB
---------
54
4.5 :
VDC Control PCB
---------
56
4.6 :
NO MOD Detector PCB
---------
57
4.7 :
Auto Keyer PCB
---------
59
Section 5.
---------
66
5.1 :
RF Drive PCB & Modulator Driver PCB
---------
67
5.2 :
RF Amplifier & Low Pass Filter
---------
67
5.3 :
Power Supply Unit ( KMW-250RB-PS )
---------
67
---------
68
Section 6.
SPECIFICATIONS OF UNIT
SCHEMATICS & PART LIST
Section 1.
GENERAL
- 1 -
1.1
INTRODUCTION
This 250W Solid State Radio BEACON Transmitter, Model No. KMW-250 is designed to transmit either carrier only signals or AM Modulation signals by internal Tone Keyer within the bandwidth from 190Khz to 535Khz. Also the transmitter is designed to operate without adjustment. It operates with RF Output Power 250W for 50 ohm from 190Khz to 535Khz, and if KMA-250 RB type Matching Unit is used for the transmitter, it matches well for good frequency tuning with antennas, of which specifications are Resistance 2 to 25 ohms and Capacitance 200 to 1500 pF as well. 1.2
COMPOSITION
1.2.1 RF AMPLIFIER UNIT (Model No : KMW-250RB-PA) It is comprised of RF Drive PCB ( DDS OSC) , MOD DRIVER , RF AMP (250W) , LPF , FWD/REF DET , CONTROL PCB, Auto Keyer, RF DRIVE AMP , NO MOD Detector and FREQUENCY SET SW , TX ON SW , MOD SELECT SW , RF OUT POWER ADJ , RF OUT MONITOR . INDICATOR LED on the front panel and RF OUT CONNECTOR on the rear panel.
1.2.2
POWER
SUPPLY
UNIT (KMW-250RB-PS)
-. Single Phase SCR Power Supply for -72VDC ( B-VDC ) Output Low Volt Power Supply for +24VDC , +15VDC , -15VDC Output. -. VDC Control for B-VDC Step Start Power Supply DC Volt Meter on Front Panel. -. DC Current Meter -. RF Out Power Meter -. Meter Function Selection SW -. Main Power Supply Switch
- 2 -
1.3
TEST DATA
2-1
Section 2.
INSTALLATION
- 3 -
2.1 INSTALLATION (1) Place the transmitter on flat and dry place and ground it with a wire more than 14 sq mm. (2) Set Input AC power on 110V/220V Selection Switch located in back panel of Power Supply (Model number : KMW-250RB-PS). (3) Use RG-8 Coaxial Cable to connect of J3(Antenna Matching) in Antenna Change Unit (KMW-250RB-CU) to (KMW-250RB-MU).
RF
input
connector
of
Antenna
Matching
Unit
(4) Use 3p Shield Cable to connect of J5 in Antenna Change Unit (KMW-250RB-CU) to J2 connector of Antenna Matching Unit (KMW-250RB-MU). (5) Use RG-8 Coaxial Cable to connect of J4 (D/L) in Antenna Change Unit (KMW-250RB-CU) to 300watt Dummy Load.
- 4 -
Section 3.
OPERATION
- 5 -
3.1
Operating Procedures
(1) Power Switch OFF in the Front Panel of Power Supply. (2) Set Switch on the Front Panel of RF Amplifier Unit (KMW-250RB-PA). ① Local/Remote Switch Local Position Set ② Auto Keyer/Test Key Switch Test Key Position Set ③ Test Key ON/OFF Switch OFF Position Set ④ Push CW of MOD Selector Switch.
(3) Turn Variable Volume on RF Amplifier Unit Front Panel to Counter- clockwise to maximum. (4) Input Main Power, 110VAC or 220VAC by plug-in Power Supply Cord. (5) Connect scope to Monitor Terminal in Power Amplifier front panel. (6) Power Switch On in Power Supply front panel. -. At this time Power LED is ON. -. Check each voltage +24VDC, -15VDC, +15VDC by Volt Meter. (7) Push TX ON Switch on RF Amplifier Unit. -. At this time B-VDC LED is ON. And voltage of -72VDC is increasing gradually. (8) ON Position Set Test Key ON/OFF Switch of RF Power Amplifier Unit. Make RF OUT POWER ADJ of RF Power Amplifier Unit to turn clockwise to check CURRENT METER VALUE and RF POWER METER VALUE, and changes in wave form on the scope connected to MONITOR terminal. (9) Push on MOD Selector Switch to select MCW2. And check CURRENT METER value and RF POWER METER value and changes in wave form on the scope connected to MONITOR terminal. Finally AM Modulated wave form would appear. (10) When MOD Selector Switch is in MCW1 position, received voice signals will be transmitted after modulation. At this time, if voice modulation level is needed to be adjusted, please adjust it by controlling Total Modulation
Volume (R34) in
Modulator Driver PCB.
( NOTE ) When Modulation level by Tone Keyer is needed to adjust, control it with VR1 ( IDENT Modulation Volume) in Control PCB. (11) Set on Operation ① Auto Keyer/Test Key Switch Auto Keyer Position Set. ② Push MCW1 of MOD Selector Switch.
- 6 -
3.2
RF Amplifier Unit (KMW-250RB-PA)
3.2.1. SWITCH
FUNCTION
(1)
LOCAL/ REMOTE SWITCH (S1) This Switch Selects either LOCAL or REMOTE Control Operation Mode.
(2)
TX ON/ TX OFF SWITCH FUNCTIONS (S2) This is a Momentary type Push Button Switch, which is On or OFF when Pushed each.
(3)
MODE SELECT SWITCH (S3)
(a) CW Switch This Switch defeats Modulation of built-in TONE OSC to Transmit Carrier without Modulation Controlled by KEY. (b) MCW1 Switch This Switch is used to Transmit Carrier with Modulation Controlled by KEY. (c) MCW2 Switch This Switch is used to Transmit RF Carrier which is Modulated Continously by built-in TONE OSC Controlled by KEY. (4) RF MONITOR CONNECTOR (J2) Output pickup Monitor Terminal Connector. (5)
PA VOLT (TP1) MOS-FET DC + AF Output Voltage Test Terminal at RF AMP (250W)
(6)
RF OUT POWER ADJ (VR1) This is used to Adjust RF Output Power.
(7)
Frequency Switch ( S6 ) RF Output Frequency Setup Switch.
(8)
Key Select Switch ( S4 ) Select Switch Internal Auto Keyer, External Key ( or Test Key ),.
(9)
Test Key Switch ( S5 ) Test Key Switch. Normal Set = OFF Position
3.2.2.
INDICATIONS OF LED
(1)
PA-FLT LED is on when RF Amplifier (250W) fails to operate.
(2)
VSWR LED is on when VSWR is over set-up value at RF out Terminal.
- 7 -
(3) O/P LED is on when Output is over set-up value at RF out Terminal. (4) O/D LED is on when Power loss is over set-up value at RF Amplifier (5) PWR CUT LED is on when RF out power supply disconnected. (6) B-VDC LED is on when power is supplied to B- Vdc. (7) REMOTE LED is on when it is Operated in Remote.
- 8 -
EMISSION MOD SELECT Switch Position CW A0 A1A
NO MOD Carrier Continuos NO MOD Carrier Telegraph
KEY SELECT Switch Positon
MCW1 MCW2
Auto Keyer
Test Key Ext Key
Test Key
O
O
ON
O
O
OFF
Ext Key
Ext Audio
Key Input
A2A
Beacon
O
O
X
A2A
Beacon + Voice MOD
O
O
X
Audio Input
A3E
Voice MOD
O
O
OFF
Audio Input
A2
MOD Carrier Continuous
O
O
ON
A2A
MOD Carrier Telegraph
O
O
OFF
A2A
MOD Carrier Beacon
O
MODE Select Switch Position CW
O
400 Hz or 1020 Hz Modulation Continuos
OFF
MCW1
ON / OFF by KEY
MCW2
ON / OFF by KEY
- 9 -
Key Input
X
RF Carrier Output ON / OFF by KEY
Continuos
ON
ON / OFF by KEY
3.3
Antenna change Unit (KMW-250RB-CU)
(1)
Move TX ON/TX OFF switches of the TX1 TX2 transmitter to TX OFF.
(2)
Move the Local/Remote switch to Local.
(3)
Selecting TX1 will connect the TX1 transmitter to ANT, while having the TX2 transmitter
connects with D/L. (4)
Selecting TX2 will connect the TX1 transmitter to ANT while having the TX2 transmitter
connects with D/L. (5) TX1 and TX2 will be switchable only when the TX1 and TX2 transmitters are all set to TX OFF. (6)
If the output power of the operating transmitter is decreased or NMD Fault ( NO MOD Fault ), it is Automatically immediately replaced with a redundant transmitter. Preset Condition (a)
Operating Transmitter shall be set Main
(b)
Auto / Manual Switch shall be Auto position.
(c)
Local/Remote Switch of TX1 and TX2 transmitters should be set to Remote
3.4
Remote Control Unit (KMW-250RB-RCU) Used for remote control, monitoring and operation in close proximity.
(1)
Allows the meter reading of TX1 and TX2 transmitters. (a)
FORWARD POWER METER.
(b)
DC VOLT/CURR METER.
(2)
Allows monitoring of the STATUS ALARMS LED of the TX1 and TX2 transmitters.
(3)
Features control of TX ON/TX OFF of TX1 and TX2 transmitters. (Local/Remote Switch of TX1 and TX2 transmitters should be set to Remote.)
(4)
Allows switching of TX1 and TX2 ANTs of Antenna Change Unit (ACU). (Local/Remote Switch of ACU should be set to Remote.)
(5) If the output power of the operating transmitter is decreased orNMD Fault ( NO MOD Fault ), it is Automatically immediately replaced with a redundant transmitter. Preset Condition (a)
Operating Transmitter should be set to Main
(b)
Auto / Manual Switch should be set to Auto position.
(c)
Local/Remote Switch of TX1 and TX2 transmitters should be set to Remote
- 10 -
Section 4.
COMPOSITION OF CIRCUITS
- 11 -
RF DRIVE PCB ( DDS OSC )
4.1
RF Drive PCB ( DDS OSC ) TABLE OF CONTENTS
A
PREPARATION
FOR USE
A1
USER DEFINED REQUIREMENTS
--------------
A-1
A1.1
CARRIER FREQUENCY
--------------
A-1
A1.2
2Fpwm
--------------
A-1
A2
FREQ DEPENDENT VARIABLES
--------------
A-1
A2.1
TCXO
--------------
A-1
A2.2
FREQUENCY VARIABLES
--------------
A-1
A2.3
RF DRIVE SOURCE LINK
--------------
A-1
A2.3.1
Internal Source
--------------
A-1
A2.3.2
External Source
--------------
A-1
B
CIRCUIT DESCRIPTION
B1
INTRODUCTION
--------------
B-1
B1.1
CARRIER OSCILLATOR
--------------
B-1
B1.2
Direct Digital Synthesizer ( DDS )
--------------
B-1
B1.3
EXTERNAL RF DRIVE
--------------
B-1
B1.4
IPM CORRECTION
--------------
B-1
B1.5
Fc BALANCED DRIVE
--------------
B-1
B1.6
RF DRIVE LEVEL DETECTOR
--------------
B-1
B1.7
N DIVIDER
--------------
B-2
B1.8
2Fpwm BALANCED DRIVE
--------------
B-2
C
MAINTENANCE
C.1
MAINTENANCE PHILOSOPHY
--------------
C-1
C.2
TEST EQUIPMENT REQUIRED
--------------
C-1
C.3
ANTI-STATIC PRECAUTIONS
--------------
C-1
C.4
FUNCTIONAL TEST / ADJUSTMENT
--------------
C-1
C4.1
TCXO CHECK
--------------
C-1
C4.2
Direct Digital Synthesizer ( DDS ) CHECK
--------------
C-2
C4.3
2Fpwm OUTPUT CHECK
--------------
C-2
C4.4
IPM COMPENSATION TUNING
--------------
C-3
C4.5
RF DRIVE SYMMETRY AND GAIN CHECK
--------------
C-3
- 12 -
RF DRIVE PCB ( DDS OSC )
TABLE OF CONTENTS C
MAINTENANCE
C4.5.1
Internal Rf Drive Source
--------------
C-3
C4.5.2
External Rf Drive Source
--------------
C-4
C4.6
RF DRIVE OUTPUT CHECK
--------------
C-4
C4.7
RF DRIVE LEVEL DETECTOR CHECK
--------------
C-4
- 13 -
RF DRIVE PCB ( DDS OSC )
A
PREPARATION FOR USE
A1 USER DEFINED REQUIREMENTS The user must determine or define some influencing parameters to prepare the rf drive PCB for testing and/or use. These parameters include : A1.1 CARRIER FREQUENCY The carrier frequency of the host transmitter will normally be used as the rf drive PCB's carrier frequency. A1.2
2Fpwm
2Fpwm Frequency
=
160 KHz
A2 FREQ DEPENDENT VARIABLES Prior to testing, the rf drive PCB must be configured for a specific carrier frequency. Before installation in a transmitter, it must be configured for the assigned carrier frequency, its rf drive source and be subjected to the test/adjustment procedure described in the maintenance section of this manual. Determine the configuration for a specific carrier frequency as follows: A2.1 TCXO TCXO Oscillator Reference frequency is 12.0 MHz. Frequency Stability is within ± 3 PPM in operating temperature from -10℃ to +50 ℃. A2.2
Frequency variables
Adjustment for EXCITER RF DRIVER PLL PCB Frequency ON
ON
S1 □
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
1
8
4
2
1
8
4
2
1
8
4
2
1
8
4
2
1
1MHz
100KHz
10KHz
1KHz
a) In case of RF frequency is 190KHz, switch-on No.1 of DIP SW 10KHz.
0.1KHz
DIP SW 100KHz, and switch-on No.8 and No.1 of
b) In case RF frequency is 535KHz, switch-on No.4 and No.1 of DIP SW 100KHz, and switch-on No.2 and No.1 of DIP SW 10KHz, and switch-on No.4 and No.1 of DIP SW 1KHz. A2.3 RF DRIVE SOURCE LINK A link that determines the rf drive source must be installed. A2.3.1 Internal Source If the integral DDS oscillator is to be used as the rf drive source. JP5 = INT Position Jumper. A2.3.2 External Source If an external exciter is to be used as the rf drive source. JP5 = EXT Position Jumper.
- 14 -
RF DRIVE PCB ( DDS OSC )
B
CIRCUIT DESCRIPTION
B1
INTRODUCTION
The rf drive PCB produces a low level rf drive at the desired carrier frequency ( Fc ) using an integral DDS oscillator or an external exciter as the signal source. A phase monitor/shifting circuit provides correction for any incidental phase modulation(IPM) introduced by the transmitter's rf power amplifier stages. The rf drive PCB also produces a 2Fpwm output, using the integral TCXO as its signal source, that ultimately deter-mines the pulse width modulation frequency. The descriptions are based on the electrical schematic. Detailed description is limited to complex or non-obvious circuits B1.1 CARRIER OSCILLATOR CARRIER OSCILLATOR ( DDS Type ) is generating RF output carrier frequency. Trimmer Capacitor of TCXO is able to adjust frequency precisely. B1.2 Direct Digital Synthesizer ( DDS ). Output of DDS is Sine wave within 4 x Carriar Frequency. B1.3 EXTERNAL RF DRIVE When the rf drive is being applied from an external source, JP5 must be connected to EXT. The frequency of this externally produced rf drive must be the assigned carrier frequency ( Fc ) and its peak-to-peak voltage ( sine or square wave ) must be more than 5.0 volts but less than 12.0 volts. B1.4 IPM CORRECTION The IPM correction circuit forms part of a dynamic loop that uses the modulation information on the PAVolts input to phase modulate the rf drive by an amount that is equal to but in opposite phase, to any incidental phase modulation introduced by the transmitter's rf power stages. B1.4.1 Transistor Q8, capacitor C50 and their associated components form a virtual capacitor; the value of which is determined by the current flow thru Q8. The amplitude and phase of the PAVolts input controls the gain of Q8. IPM BALance (R55) potentiometer is adjusted, when the rf drive PCB is in a transmitter, for optimum correction of any incidental phase modulation. B1.4.2 the SLICER BIAS potentiometer (R32) is adjusted for a symmetrical square wave ( 50 percent duty cycle ) at test point TP6. B1.5 Fc BALANCED DRIVE The Fc balanced drive is a switching circuit that ensures the rise and fall times of its output square wave are minimal. The output of the balanced drive circuit; which is a nominal 15 vdc, symmetrical waveform; is applied to J1-2 as the host transmitter's low level rf drive. B1.6 RF DRIVE LEVEL DETECTOR The rf drive level detector is a half-wave rectifier (D7) and a voltage controlled switch (Q7). When rf drive is not being produced, Q7 will not be forward biased ( turned on ) and the circuit's RF inhibit output will be on open collector. When an rf drive is being produced, C52 will charge to the average value of the positive voltage half cycles
- 15 -
RF DRIVE PCB ( DDS OSC )
and forward bias ( turn on ) Q7. The circuit's RF inhibit output will be a current sink to ground. B1.7 N DIVIDER N DIVIDER divides 12.0 MHz frequency from TCXO to 1/5 at U6, and to 1/15 at U7. Output is 160KHz at 15Vpp in normal condition. B1.8 2Fpwm BALANCED DRIVE The 2Fpwm balanced drive is a switching circuit that ensures the rise and fall times of its output square wave are minimal. The output of the 2Fpwm balanced drive, which is 0.0 to +15 vdc pulses, is applied to J2 as the 2Fpwm source for the modulator drive PCB in the host transmitter. The 2Fpwm output ultimately determines the transmitter's variable pulse width modulation ( PWM ) frequency.
- 16 -
RF DRIVE PCB ( DDS OSC )
C
MAINTENANCE
C1
MAINTENANCE PHILOSOPHY
The rf drive PCB is intended to be removed from the transmitter, placed on a suitable work surface and connected to appropriate test equipment for servicing. C2
TEST EQUIPMENT REQUIRED
Test equipment in table C-1 is required. C3
ANTI-STATIC PRECAUTIONS
The rf drive PCB contains semiconductor devices that are susceptible to damage from electrostatic discharge. The anti-static precautions must be observed at all times. C4
FUNCTIONAL TEST / ADJUSTMENT
A functional test will determine if the rf drive PCB's circuits are operating within defined parameters. It also identifies any adjustment that can be made to correct out-of-tolerance conditions. The results will determine if additional corrective action is required and in most cases will pin point any faults to a specific circuit. ⒜ Connect the rf drive PCB to the test setup as depicted in figure C-6.
Ensure dc return paths designated E1, E2, E3 and E4 are interconnected. ⒝ Set test setup's +15.0 vdc switch to ON.
NOTE PCB mounted potentiometers are multi-turn potentiometers that have a clutch at either extreme of their adjustment. Their wipers must be turned a minimum of four turns in one direction to ensure they have been set fully clockwise or fully counterclockwise. C4.1
TCXO CHECK
Check the TCXO output as follows: ⒜ Connect test leads of a frequency counter between U6-12 and terminal E(ground) of rf drive PCB.
⒝ The frequency counter's reading shall be within 1.0Hz of the frequency stamped on the TCXO. ⒞ If necessary, adjust FREQ ADJust trimmer capacitor ( TCXO ), to precisely obtain the required carrier
oscillator frequency. ⒟ Disconnect the frequency counter test leads.
⒠ Connect test leads of an oscilloscope between U6-12 and terminal E (ground) of rf drive PCB.
- 17 -
RF DRIVE PCB ( DDS OSC )
⒡ Oscilloscope indication should be a nominal 5.0 volts peak-to-peak waveform similar to example shown in
figure C-1. ⒢ Disconnect the oscilloscope test leads.
C4.2 Direct Digital Synthesizer ( DDS ) CHECK Verify the DDS circuit is providing the required outputs as follows: ⒜ Connect test leads of a frequency counter between U12-1 ( internal rf drive source ) and
terminal E
( ground ) of rf drive PCB. ⒝ The frequency counter's reading shall be the assigned rf carrier frequency ( Fc ) ±1.0 Hz. ⒞ Disconnect the frequency counter test leads. ⒟ Connect test leads of an oscilloscope between
U12-1 ( internal rf drive source ) and terminal E ( ground )
of rf drive PCB. ⒠ Oscilloscope indication should be a nominal 15.0 volts peak-to-peak waveform similar to example shown
in figure C-2.
Ftcxo = 12.0 MHz
ƒc = 350 kHz
2.0V/div, Scale Center=0.0 vdc
5.0V/div, Scale Center = 0.0vdc
Figure C-1 TCXO Output Waveform
Figure C-2 Frequency Divider Output Waveform
⒡ Disconnect the oscilloscope test leads.
C4.3 2Fpwm OUTPUT CHECK Verify the 'N' divider circuit is providing the appropriate 2Fpwm output as follows: ⒜ Connect test leads of a frequency counter between test point TP2 and terminal E(ground) of rf drive PCB. ⒝ The frequency counter's reading shall be the desired 2Fpwm output. ⒞ Disconnect the frequency counter test leads. ⒟ Connect test leads of an oscilloscope between test point TP2 and terminal E(ground) of rf drive PCB.
- 18 -
RF DRIVE PCB ( DDS OSC )
⒠ Oscilloscope waveform indication should be nominal 15.0 volts peak-to-peak pulses similar to example
shown in figure C-3. ⒡ Disconnect the oscilloscope test leads.
C4.4
2Fpwm = 160 kHz
ƒc = 350 kHz
5.0V/div, Scale Center = 0.0 vdc
5.0V/div, Scale center = 0.0 vdc
Figure C-3 2Fpwm Output Waveform
Figure C-4 Balanced Drive Input Waveform
IPM COMPENSATION TUNING
It is not possible to fully test the IPM compensation circuit on a work bench. The IPM compensation input is a dynamic feedback of the rf carrier's modulation envelope from the host transmitter's rf power amplifier stage. Final testing / adjustment is completed when rf drive PCB is in the transmitter. C4.5 RF DRIVE SYMMETRY AND GAIN CHECK Verify the input to the balanced drive circuit is a symmetrical, 15 volt peak-to-peak, square wave at the rf carrier frequency as follows: ⒜ Verify requirements of paragraph C4.2 has been completed and is being met.
C4.5.1 Internal Rf Drive Source If the integral rf oscillator is to be used as the rf drive source, proceed as follows: ⒜ Verify a link is connected between Jumper.
JP5 = INT Position Jumper.
⒝ Connect oscilloscope test leads between U12-1 and terminal E(ground) of rf drive PCB. ⒞ Oscilloscope indication should be similar to example in figure C-2. If should be a relatively symmetrical
square wave, at the carrier frequency, with a nominal peak-to-peak amplitude of 15.0 volts. ⒟ Connect oscilloscope between test point TP6 and terminal E(ground) of rf drive PCB. ⒠ Oscilloscope indication should be similar to example shown in figure C-4.
It should be a symmetrical (50% dut y cycle) square wave, at the carrier frequency (ƒc), with a nominal
- 19 -
RF DRIVE PCB ( DDS OSC )
peak-to-peak amplitude of 15.0 volts. ⒡ If necessary, adjust SLICER BIAS potentiometer R32 for 50% duty cycle. ⒢ Disconnect the oscilloscope test leads.
C4.5.2 External Rf Drive Source If an external exciter is to be used as the rf drive source, check the input stage as follows: ⒜ Verify a link is connected between Jumper.
JP5 = EXT Position Jumper. ⒝ Set the frequency of the test setup's function generator to the carrier frequenc y(ƒc), at a peak-to-peak
output level of 5.0 volts. NOTE The external rf drive input may be a sine wave or a square wave. The minimum amplitude in both cases must be not less than 5.0 volts peak-to-peak. Maximum amplitude must not exceed 12.0 volts peak-to-peak for square wave input or 15.0 volts for a sine wave input. ⒞ Connect test leads of an oscilloscope between test point TP6 and terminal E(ground) of rf drive PCB. ⒟ Oscilloscope indication should be similar to example shown in figure C-4.
It should be a symmetrical (50% duty cycle) square wave, at the carrier frequency (ƒc), with a nominal peak-to-peak amplitude of 15.0 volts. ⒠ If necessary, adjust SLICER BIAS potentiometer R32 for 50% duty cycle. ⒡ Disconnect the oscilloscope test leads.
C4.6 RF DRIVE OUTPUT CHECK Verify the rf drive output is satisfactory, as follows: ⒜ Verify requirements of paragraph C4.5 have been completed and are being met. ⒝ Connect test leads of an oscilloscope between test setup' rf drive test point (J1-2) and (ground).
⒞ Oscilloscope indication should be similar to example shown in figure C-5.
It should be a symmetrical (50% duty cycle) square wave, at the carrier frequency (ƒc), with a nominal peak-to-peak amplitude of 15.0 volts. C4.7 Rf DRIVE LEVEL DETECTOR CHECK Verify the rf drive level detector circuit provides a current sink to ground, as the RF Inhibit output, when rf drive is present as follows: ⒜ Verify requirements of paragraph C4.6 have been completed and are being met. ⒝ Verify the 15 volt dc power supply connected as the voltage source for the RF Inhibit load resistor, is
turned on and its output voltage is 15 volts dc.
- 20 -
RF DRIVE PCB ( DDS OSC )
ƒc = 350 kHz 5.0V/div, Scale center = 0.0 vdc Figure C-5 RF Drive Output Waveform
⒞ Connect test leads of a digital multimeter, that has been set to measure dc volts, across diode D7.
The positive test lead should be connected to D7's cathode. ⒟ Digital multimeter indication should be a nominal 2.0 vdc that is positive with respect to ground. ⒠ Connect test leads of digital multimeter, that has been set to measure dc volts, between the test setup's
RF Inhibit test point (J1-4) and ground. ⒡ Digital multimeter indication should be near zero volts dc, indicating the RF Inhibit output is a current sink
to ground. ⒢ Monitor digital multimeter indication while momentarily connecting a shorting jumper across capacitor C52. ⒣ Digital multimeter indication should be a nominal 15 vdc, indicating the RF Inhibit output is an open
collector, while shorting jumper is connected. ⒤ Disconnect test leads of digital multimeter.
- 21 -
RF DRIVE PCB ( DDS OSC )
Figure C-6
Test Setup for
- 22 -
Rf Drive PCB
RF DRIVE PCB ( DDS OSC )
Table C-1 Test Equipment
NOMENCLATURE
PART, MODEL, OR TYPE NUMBER (EQUIVALENTS MAY BE USED)
APPLICATION
Digital Multimeter
3 1/2 digit, ac and dc volts (10Mohm input), ohms and amps, +0.5% accuracy, Beckman 3010
Testing and maintenance
Frequency Counter
5ppm up to 10 MHz Fluke Model 1900A
Measure rf frequency
Oscilloscope
Any good quality oscilloscope with a calibrated time base Tektronix Model T922
Testing and maintenance
Function Generator
Sine, square and triangular waveform with dc offset Hewlett Packard model 651B
External rf drive signal source
DC Power Supply (Fixed)
15 vdc, 1.0 A
Positive dc voltage source (+15 vdc)
DC Power Supply (Fixed)
15 vdc, 1.0 A
Negative dc voltage source (15 vdc)
Test Setup
As depicted in figure C-7
Interconnection between rf drive PCB under test and test equipment.
- 23 -
MODULATOR DRIVER PCB
4-2. MODULATOR DRIVER PCB TABLE OF CONTENTS A
PREPARATION
FOR USE
A1
USER DEFINED REQUIREMENTS
--------------
A-1
A1.1
2Fpwm
--------------
A-1
A1.2
DIVIDE-BY LINK CONNECTIONS
--------------
A-1
A1.3 A1.4
PULSE WIDTH MODULATION FREQUENCY LOW PASS FILTER SETTING
---------------------------
A-1 A-1
B
CIRCUIT DESCRIPTION
B1
INTRODUCTION
--------------
B-1
B2
DETAILED DESCRIPTION
--------------
B-1
B2.1
BALANCE/UNBALANCE AMPLIFIER
--------------
B-1
B2.2
ZERO CROSSING RESET
--------------
B-1
B2.3
MODULATION LEVEL DETECTOR/COMPARATOR
--------------
B-2
B2.4
THRESHOLD LATCH/CHOPPER SWITCH
--------------
B-2
B2.5
AUDIO GAIN
--------------
B-2
B2.6
LOW PASS FILTER
--------------
B-3
B2.7
CARRIER LEVEL CONTROL
--------------
B-3
B2.8
PWM DIVIDER
--------------
B-3
B2.9
PWM RAMP INTEGRATOR
--------------
B-3
B2.10
VARIABLE PULSE WIDTH GENERATOR
--------------
B-3
B2.11
MOD DRIVE FAULT DETECTOR
--------------
B-4
B2.12
MOD DRIVE INHIBIT
--------------
B-4
B2.13
PWM FAULT DETECTOR
--------------
B-5
C
MAINTENANCE
C1
MAINTENANCE PHILOSOPHY
--------------
C-1
C2
TEST EQUIPMENT REQUIRED
--------------
C-1
C3
ANTI-STATIC PRECAUTIONS
--------------
C-1
C4
TEST/ADJUSTMENT PREREQUISITES
--------------
C-1
C5
FUNCTIONAL TEST/ADJUSTMENT
--------------
C-1
C5.1
INITIAL CONNECTION/SETTINGS
--------------
C-1
C5.2
PWM DIVIDER CHECK
--------------
C-2
C5.3
PWM FAULT DETECTOR CHECK
--------------
C-2
- 24 -
MODULATOR DRIVER PCB
TABLE OF CONTENTS C
MAINTENANCE
C5.4
PWM RAMP INTEGRATOR CHECK
--------------
C-3
C5.5
NOISE CANCELLATION/AUDIO BALANCE CHECK
--------------
C-3
C5.6
MODULATION LEVEL DETECTOR/COMPARATOR CHECK
--------------
C-4
C5.7
POSITIVE MODULATION LIMITING
--------------
C-5
C5.8
AUDIO/MODULATION DEPTH CONTROL
--------------
C-6
C5.9
CARRIER LEVEL REFERENCE CONTROL
--------------
C-7
C5.10
VARIABLE PULSE WIDTH GENERATOR CHECK
--------------
C-10
C5.11
SHUTBACK/MOD DRIVE ENABLE CONTROL CHECK
--------------
C-10
C5.12
MOD DRIVE FAULT CHECK
--------------
C-11
- 25 -
MODULATOR DRIVER PCB
A
PREPARATION FOR USE
A1 USER DEFINED REQUIREMENTS The user must determine or define some parameters to prepare the modulator driver PCB for testing and/or use. These parameters include: A1.1 2Fpwm 2Fpwm = 160 KHz A1.2 DIVIDE-BY LINK CONNECTIONS modulator driver PCB's A and B divide-by links shall be connected to the /2 terminals. A1.3 PULSE WIDTH MODULATION FREQUENCY The pulse width modulation frequency (ƒpwm) is derived from the frequency applied to the modulator driver 2Fpwm. Dependent on its frequency, 2Fpwm is divided by two to obtain an ƒpwm 80.0 kHz. A1.4 LOW-PASS FILTER SETTING The low-pass filter switch (S1) settings set the 1.0 dB high frequency roll-off for the modulating audio to one of four preset frequencies (see table A-1). A1.4.1 When the modulator driver is installed in a transmitter, the low-pass filter switch settings are dictated by complex factors. These factors may include an antenna system with sideband limitations, square wave overshoot and the type or method of audio processing. Refer to the transmitter's records for switch settings when installing a modulator driver PCB in a transmitter.
Table A-1 Low-Pass Filter Switch Settings HIGH FREQUENCY ROLL-OFF (1.0 dB)
S1 SWITCH SETTINGS S1-1
S1-2
16.5 kHz
OPEN
OPEN
10.0 kHz
OPEN
CLOSED
6.6 kHz
CLOSED
OPEN
5.5 kHz
CLOSED
CLOSED
- 26 -
MODULATOR DRIVER PCB
B
CIRCUIT DESCRIPTION
B1
INTRODUCTION
The modulator driver PCB produces a train of variable width, rectangular pulses; at a nominal 80kHz, as the mod drive output. B1.1 The on/off ratio of these pulses contains the carrier level and modulation envelope information for a host transmitter's rf power amplifier stage(s). The carrier level is determined by a dc reference voltage, while the modulation envelope is determined by the frequency and amplitude of the modulating audio. The modulating audio is superimposed on the dc reference voltage and amplified by a four-quadrant multiplier, which produces the carrier reference level. The gain of the multiplier is determined by the externally produced gain control input, the amplitude of the B-vdc voltage and carrier level potentiometer R37. B1.2 Logic circuits monitor the rf current sample, which is a voltage that is directly proportional to the host transmitter's rf output current, for duration (frequency) and amplitude of the modulation peaks. this circuit effectively forms a dynamic servo with the rf power amplifier stage. When the stress current limit of the rf power amplifier stage is approached, the logic circuit inhibits a portion of the modulating audio's offending positive going half-cycles. The rf output is cutback during and only during this portion of the offending half-cycles. B1.3 The precise frequency of the pulse width modulated(PWM) mod drive, is determined by the 2Fpwm input. This input is divided by two to produce a pulse width modulation frequency (ƒpwm) that is between. 80.0 kHz. B1.4 Additional protection for the host transmitter's rf power stage is provided by an electronic switch that is controlled by the shutback input. When the host transmitter's protection circuits generate a shutback command, the electronic switch instantly inhibits the mod drive output and maintains the inhibited state until the shutback command is removed. B1.5 A relay, which is controlled by the externally produced mod drive enable input and an internal mod drive fault detector, acts as a fail-safe mechanical switch for the mod drive output. The relay is normally held energized. It de-energizes when a mod drive input is removed or when a mod drive output with an excessive on/off ratio is detected.
B2 DETAILED DESCRIPTION The following is a detailed description of complex or non-obvious circuits based on the electrical schematics. B2.1 BALANCE/UNBALANCE AMPLIFIER The balance/unbalance amplifier circuit impedance matches the 600 ohm balanced audio input. COMMON MODE BALANCE potentiometer R17 balances the output of unity gain amplifiers U1C and U1D to balance the out-of-phase audio and to eliminate unwanted in-phase transients. B2.2 ZERO CROSSING RESET U4A and CR6 are connected as a zero crossing switch that provides a +15 vdc output during the negative voltage half-cycles of the audio signal's voltage waveform and is effectively an open circuit during its positive voltage half-cycles.
- 27 -
MODULATOR DRIVER PCB
B2.2.1 During negative voltage half-cycles, U4A's inverting input will be less positive than its non-inverting input and its output will be +15 vdc. Since this state occurs at the negative voltage transition and the output of U4A is a low impedance voltage source, capacitor C8 will charge to +15 vdc at the zero volt crossing. B2.2.2 During positive voltage half-cycles, U4A's inverting input will be more positive than its non-inverting input and its output will be 15 vdc. Diode CR6 will block this voltage and the output of U4A will have no influence on the charge-state of capacitor C8. B2.3 MODULATION LEVEL DETECTOR/ COMPARATOR The mod level detector rectifies the mod envelope input and produces and audio waveform that is representative of the modulation envelope. This waveform is compared to fixed reference voltages that represent specific modulation depths by an eight stage comparator circuit. As the reference thresholds are exceeded, the comparator circuit progressively connects more elements of a resistor ladder into capacitor C8's discharge path. Any combination of on-time(frequency) and amplitude (mod depth) that will over-stress the current capacity of the host transmitter's rf power amplifier stage, will result in capacitor C8 discharging to zero volts before the next zero volt crossover of the input audio's voltage waveform. B2.3.1 The voltage divider formed by R70 and R7 thru R14, provides eight incremental threshold voltages for the level comparators. Each threshold represents the nominal voltage of the modulation envelope audio for specific modulation depths. SET THRESHOLD potentiometer R6 is adjusted, when the modulator driver PCB is installed in a transmitter, for the actual voltage present when the rf output's modulation peaks are 40 percent. B2.4 THRESHOLD LATCH/CHOPPER SWITCH The threshold latch and the chopper switch form a circuit that completes the excessive modulation peak stress current protection circuit. B2.4.1 When capacitor C8 has a positive voltage charge(normal), U4B's non-inverting input will be more positive than its inverting input ant U4B's output will be +15 vdc. Field effect transistor Q1 will be reverse biased (turned off) and have no influence on the audio signal. Audio Limiting lamp DS1 will not be turned on. B2.4.2 As capacitor C8 discharges through ground to a negative voltage, U4B's non-inverting input will go less positive than its inverting input and U4B's output will switch to 15 vdc. Q1 will be forward biased (turned on) and clamp the audio signal to ground. The audio signal will be clamped to ground for the balance of its positive voltages half-cycle. At the end of the half-cycle, the zero voltage crossing will charge capacitor C8 to a positive voltage (see paragraph A1) and reset the chopper switch. B2.5 AUDIO GAIN U1A is connected as a unity gain, buffer amplifier. AUDIO GAIN potentiometer R34 is adjusted for the desired modulation depth when the modulator driver PCB is installed in its host transmitter. It has sufficient range to set the modulation depth at 100% when the audio input is between 0dBm and +12dBm.
- 28 -
MODULATOR DRIVER PCB
B2.6 LOW PASS FILTER The low pass filter circuit is a 1.0dB, high frequency roll-off, three-pole filter. One of four roll-off frequencies (16.5 kHz, 10 kHz, 6.5 kHz or 5.5 kHz) may be selected, dependent on the settings of low pass filter switch S1. The high frequency roll-off selection will normally be dictated by complex factors, such as an antenna system with sideband limitations, square wave overshoot or the equipment that pre-processes the audio. B2.7 CARRIER LEVEL CONTROL The carrier level control circuit is a variable gain, wideband, linear amplifier. B2.7.1 The filtered audio from U7A is superimposed on a nominal 1.95 vdc offset at the junction of R53/R51, as the carrier reference level source. B2.7.2 U10's gain is determined by the gain control input's dc level and the B-vdc level. Its gain will be unity when the gain control is set for the host transmitter's rated carrier level(nominally 9.0 vdc) and the B-vdc input is 72vdc. B2.7.3 U10's gain changes in direct proportion to changes in the gain control voltage. If the gain control voltage goes to or is set to 0.0 vdc, U10's gain will be minimum (zero) and the host transmitter's rf output will be turned off. B2.7.4 U10's gain changes inversely to changes in the B-vdc input. This eliminates the need for sophisticated filtering of the B-vdc power supply and will maintain host transmitter's rf output at the selected preset level during changes of up to ±10 percent in B-vdc input. Since the B-vdc input voltage is directly proportional to ac power source voltage, variations of up to ±10 percent will not affect the host transmitter's rf output. B2.7.5 Carrier lever (CAR LVL) potentiometer R37 is provided to adjust the output voltage nominally 5% to ensure equal amplitudes form each exciter in dual exciter applications. B2.8 PWM DIVIDER The PWM divider divides the 2Fpwm input by two and provides a square wave output at the required pulse width modulation frequency (ƒpwm). 2Fpwm is 160.0 kHz, / 2links are connected and only one flip flop (U5B) is incircuit. ƒpwm will be between 80.0 kHz. B2.9 PWM RAMP INTEGRATOR The PWM ramp integrator is an integrating circuit that is driven by the square wave output of the PWM divider circuit. It operates on the linear portion of its R/C curve and produces a linear, triangular, waveform at ƒpwm.
B2.10 VARIABLE PULSE WIDTH GENERATOR The variable pulse width generator is a differential amplifier that compares the carrier reference level voltage to the PWM ramp waveform. It produces a variable pulse width rectangular waveform, at ƒpwm, as the mod drive output. The on period (+15 vdc) of the rectangular waveform is determined by the percentage of each cycle that the carrier level reference voltage is more positive than the PWM ramp voltage (see figure B-1). When the carrier level reference voltage is a stable dc (no modulation) that represents the host transmitter's rated carrier level, the on/off ratio will be a nominal 45/55.
- 29 -
MODULATOR DRIVER PCB
When audio is added to the carrier level reference voltage, the on/off ratio will be continuously changing in direct proportion to the frequency and amplitude of the audio. When the reference dc voltage represents the rated carrier level and the modulating audio's amplitude represents 100 percent modulation, the on/off ratio will be a nominal 0/100 at the valley and 90/10 at the peak of each cycle.
Figure B-1 Timing Diagram for PWM Differential Amplifier
B2.11 MOD DRIVE FAULT DETECTOR The mod drive fault detector circuit is a voltage controlled switch that controls the status of relay K1 when mod drive enable input is +15 vdc. It provides a current sink to ground when the on/off ratio of the mod drive is satisfactory and an open collector when it is not. The rectangular mod drive waveform at the junction of voltage divider R67/R68(+7.5 vdc during on period) is applied to an average detector formed by C20/C21 and R66. B2.11.1 The average on/off ratio, for all except very low audio frequencies, will not exceed 45/55, and the resultant control voltage applied to the non-inverting input of U9B will be less positive than the +4.3 vdc reference voltage applied to its inverting input. Comparator U9B will provide a current sink to ground and energize relay K1. The mod drive output will applied to J1-9. B2.11.2 If a malfunction occurs that causes the on/off ratio to exceed 57/43 or if a very low audio frequency causes the apparent on/off ratio to exceed 57/43, the control voltage will go more positive than the +4.3 vdc reference voltage. Comparator U9B's output will switch to an open collector and relay K1 will de-energize. The mod drive output will be inhibited.
B2.11.3 If the +15 vdc mod drive enable input is removed, relay K1 will be de-energized regardless of the mod drive fault detector's status, and the mod drive output will be inhibited. B2.12 MOD DRIVE INHIBIT The mod drive inhibit circuit is an electronic switch that clamps the output of U9A to ground and inhibits the PWM(mod drive) signal whenever +15 vdc is applied as the shutback input at J1-5 or when the output of the PWM fault detector (U6-7) is +15 vdc. When both of these inputs are an open collector(zero volts), the mod drive inhibit circuit has no influence.
- 30 -
MODULATOR DRIVER PCB
B2.13 PWM FAULT DETECTOR The PWM fault detector peak detects the 0.0 to +15 Vdc square wave output of the PWM divider, which occurs at a repetition rate of the PWM frequency (80.0 kHz). The resultant positive dc voltage is applied to the inverting input of comparator U6B. When the PWM divider is not producing a square wave output, this voltage will be less positive than the threshold voltage on U6B's non-inverting input(nominally 1.96 Vdc) and U6B's output will be +15 vdc. This +15 vdc output is applied to the mod drive inhibit circuit as an inhibiting input. When the PWM divider is producing a square wave output, the peak detector's output voltage will be more positive than the threshold voltage on U6B's non-inverting input. U6B's output will be zero volts and it will have no influence.
- 31 -
MODULATOR DRIVER PCB
C
MAINTENANCE
C1 MAINTENANCE PHILOSOPHY The modulator driver PCB is intended to be removed from the transmitter, placed on a suitable work surface and connected to the appropriate test equipment for servicing. C2 TEST EQUIPMENT REQUIRED Test equipment in table C-1 is required. C3 ANTI-STATIC PRECAUTIONS The modulator driver PCB contains semiconductor devices that are susceptible to damage from electrostatic discharge. The anti-static precautions must be observed at all times. C4 TEST/ADJUSTMENT PREREQUISITES The following prerequisites must be completed prior to commencing a functional test/adjustment procedure. NOTE PCB mounted potentiometers are multi-turn potentiometers that have a clutch at either extreme of their adjustment. Their wipers must be turned a minimum of four turn in one direction to ensure they have been set fully clockwise or fully counter clockwise. ⒜ Verify the appropriate divider links ( /2 ), on modulator driver PCB to be tested, are connected to provide a
PWM frequency that is
80.0 kHz
as determined in paragraph A1. 1.
⒝ Verify the low-pass filter switch (S1) is set for the desired 1.0 dB high frequency roll-off as tabulated in
table A-1. C5 FUNCTIONAL TEST/ADJUSTMENT A functional test will determine if the modulator driver PCB's circuits are within defined parameters. The results determine if corrective action is required and in most cases will pin point any faults to a specific circuit. C5.1 INITIAL CONNECTION/SETTINGS Connect the modulator driver PCB to be tested to a test setup and preset the test setup's switches and power supplies as follows:
⒜ Connect modulator driver PCB to the test setup as depicted in figure C-7. ⒝ Set the output of the test setup's B-vdc power supply to precisely 72.0 vdc and open its associated B-vdc
switch. ⒞ Set the output of the test setup's +15 vdc power supply to precisely +15.0 vdc and open its associated +15
vdc switch. ⒟ Set the output of the test setup's 15 vdc power supply to precisely 15.0 vdc and open its associated 15
vdc switch. ⒠ Set the test setup's function generator for a 0.0 to +15.0 volt square wave at a frequency of 2Fpwm (see
paragraph A1.3)
- 32 -
MODULATOR DRIVER PCB
⒡ Set the test setup's audio signal generator for 1000 Hz and a zero output(turned off), ⒢ Set the output of the test setup's Test power supply for zero volts. ⒣ Connect Test power supply's positive output to J2-3 by setting test setup's TEST switch to MOD
ENVELOPE. ⒤ Set test setup's +15.0 vdc switch to ON. ⒥ Set test setup's -15.0 vdc switch to ON. ⒦ Set test setup's B-vdc switch to ON. ⒧ Set test setup's MOD DRIVE switch to ENABLE. ⒨ Set test setup's SHUTBACK switch to its open position.
C5.2 PWM DIVIDER CHECK: Verify the PWM divider circuit produces the appropriate pulse width modulation frequency (ƒpwm) from the 2Fpwm input, as follows: ⒜ Verify requirements of paragraph C5.1 are completed and are being met. ⒝ Connect a frequency counter between TP4 of the modulator driver PCB and ground. ⒞ The frequency counter's reading shall be the pulse width modulation frequency (ƒpwm) ( 80.0 kHz ). See
paragraph A1.3. ⒟ Connect an oscilloscope between TP4 of the modulator driver PCB and ground. ⒠ Oscilloscope waveform indication should be similar to the example depicted in figure C-1.
It should be a zero to 15.0 vdc square wave.
2Fpwm = 160 kHz (ƒpwm = 80.0 kHz) 10.0 us/div, 5.0v/div, Scale Centre = 0.0 vdc Figure C-1 ƒpwm Output of PWM Divider
C5.3 PWM FAULT DETECTOR CHECK: Verify the PWM fault detector circuit will produce a +15 vdc mod drive inhibiting output when the pulse width modulation frequency is not present, as follows: ⒜ Verify requirements of paragraph C5.1 and C5.2 are being met.
- 33 -
MODULATOR DRIVER PCB
⒝ Connect a digital multimeter(set to measure dc volts) between TP16 of the modulator driver PCB and
ground. ⒞ The digital multimeter's indication should be near zero volts dc. ⒟ Turn off the 2Fpwm input, by turning off output of test setup's function generator. ⒠ The digital multimeter's indication shall swich to a nominal +15 Vdc. ⒡ Turn on the 2Fpwm input by tuning on output of test setup's function generator. ⒢ The digital multimeter's indication shall return to near zero volts dc.
C5.4 PWM RAMP INTEGRATOR CHECK: Verify the output of the PWM ramp integrator circuit is a triangular waveform at the pulse width modulation frequency (ƒpwm) as follows: ⒜ Verify requirements of paragraphs C5.1 and C5.2 are completed and are being met. ⒝ Connect test leads of an oscilloscope between TP6 of the modulator driver PCB and ground. ⒞ Oscilloscope indication should be similar to example depicted figure C-2.
It should be a nominal 4.0 volt, peak-to-peak, triangular waveform, at ƒpwm. NOTE Negative going peaks of triangular waveform in step ⒞ should just touch 0.0 vdc.
2Fpwm = 160 kHz (ƒpwm = 80.0 kHz) 10.0 us/div, 5.0v/div, Scale Centre = 0.0 vdc Figure C-2 ƒpwm Output of PWM Divider
C5.5 NOISE CANCELLATION/AUDIO BALANCE CHECK Verify In-phase, equal amplitude, noise spikes are cancelled and the input audio is balanced as follows: ⒜ Verify requirements of paragraph C5.1 are being met. ⒝ Apply in-phase audio to the positive and negative audio inputs by reconnecting the audio signal
- 34 -
MODULATOR DRIVER PCB
generator's test leads so the shield is disconnected, the negative lead is connected to J2-7 and the positive lead is connected to J2-6 and J2-8. ⒞ Verify audio signal generator's frequency is 1000Hz and set its output level to +10 dBm. ⒟ Connect an oscilloscope between TP3 of the modulator driver PCB and ground. ⒠ Oscilloscope waveform should be a zero volt dc trace. ⒡
necessary, adjust modulator driver PCB's COMMON MODE BALANCE potentiometer (R17) for a null (dcIftrace) on oscilloscope's waveform. ⒢ Restore normal audio input by connecting the audio signal generator's test leads as depicted in figure C-7. ⒣ Oscilloscope waveform should be a symmetrical 1000 Hz sine wave that is centred on the zero vdc
reference. C5.6 MODULATION LEVEL DETECTOR/ COMPARATOR CHECK Check the modulation level detector/comparator circuit as follows: NOTE The modulation level detector/comparator circuit is a dynamic circuit that monitors the amplitude modulation information on the B-vdc being applied to the transmitter's rf power amplifiers. Its controlling factors are the frequency and amplitude of the modulation information. Since it is difficult to simulate the dynamic operation, the following is a go/no go test only. ⒜ Verify requirements of paragraph C5.1 and C5.5 are being met. ⒝ Set the modulator driver PCB's THRESHOLD potentiometer (R6) fully counter clockwise.
NOTE The THRESHOLD potentiometer's final setting is determined when the modulator driver PCB is installed in a transmitter. It will be necessary to reestablish the final setting when the modulator driver PCB is installed in the transmitter. ⒞ Set the output of the test setup's Test power supply to 3.0 vdc. ⒟ Verify an oscilloscope is connected to TP3 of the modulator driver PCB and it's waveform is a symmetrical
1000 Hz sine wave. ⒠ Connect a digital multimeter between TP1 of the modulator driver PCB and ground.
⒡ Multimeter indication should be +15.0 vdc. ⒢ Adjust modulator driver PCB's THRESHOLD potentiometer clockwise until digital multimeter's indication
just switches to 15.0 vdc. ⒣ Connect digital multimeter between U3-14, of the modulator driver PCB and ground. ⒤ Multimeter indication should be +15.0 vdc for at least one half of each audio cycle and than decrease
towards 15 vdc at an exponential rate during the second half-cycle.
- 35 -
MODULATOR DRIVER PCB
NOTE The voltage being monitored on the output of the comparator is capacitor C8's charge voltage. It is instantly charged to +15 vdc by the zero crossing reset circuit during the audio's negative half cycles and discharges towards 15 vdc during the positive half cycles, provided one or more comparator is turned on and providing a current sink to 15 vdc. The RC constant and the audio frequency determine the rate and amount of voltage change. ⒥ Slowly increase output voltage of Test power supply until the multimeter's indication just switches to 15.0
vdc. ⒦ Record Test power supply's output voltage at the instant of switchover. ⒧ The voltage recorded in step ⒦ should be a nominal 3.3 vdc. ⒨ Connect multimeter between U3-1/ground and repeat steps ⒤ thru ⒦. Voltage in step ⒦ should be a
nominal 3.8 vdc. ⒩ Connect multimeter between U3-2/ground and repeat steps ⒤ thru ⒦. Voltage in step ⒦ should be a
nominal 3.8 vdc. ⒪ Connect multimeter between U2-13/ground and repeat steps ⒤ thru ⒦. Voltage in step ⒦ should be a
nominal 4.0 vdc. ⒫ Connect multimeter between U2-2/ground and repeat steps ⒤ thru ⒦. Voltage in step ⒦ should be a
nominal 4.2 vdc. ⒬ Connect multimeter between U2-1/ground and repeat steps ⒤ thru ⒦. Voltage in step ⒦ should be a
nominal 4.4 vdc. ⒭ Connect multimeter between U2-2/ground and repeat steps ⒤ thru ⒦. Voltage in step ⒦ should be a
nominal 4.6 vdc. C5.7 POSITIVEMODULATION LIMITING: Verify a portion of the audio's positive half-cycles are inhibited(clamped to ground) when duration(frequency) and amplitude of the modulation information on the mod envelope input exceeds thresholds that represent the maximum stress current which the transmitter's rf power amplifiers can sustain without overheating, as follows: ⒜ Verify requirements of paragraph C5.1 are being met. ⒝ Set output voltage of the test setup's Test power supply to 0.0 vdc. ⒞ Verify an oscilloscope is connected to TP3 of the modulator driver PCB and it's waveform is a symmetrical
1000 Hz sine wave. ⒟ Set audio signal generator for a frequency of 30 Hz at an output level of +10 dBm. ⒠ Set Test power supply's output to 3.2 vdc. ⒡ Oscilloscope waveform indication should be similar to example depicted in figure C-3.
It should be a 30 Hz sine wave that has a portion of its positive half cycle inhibited
- 36 -
(clamped to ground).
MODULATOR DRIVER PCB
Audio = 30 Hz 10.0 ms/div, 1.0 V/div, Scale Centre = 0.0 vdc Figure C-3 Inhibited Audio Waveform
⒢ Modulator driver PCB's Audio Limiting lamp(DS1) shall be flashing at a 30 Hz rate. ⒣ Monitor the oscilloscope waveform while slowly increasing the Test power supply's output voltage to 4.7
vdc. ⒤ As each modulation level comparator threshold voltage (see in paragraph C5.6) is exceeded; a larger
segment of the audio's positive half-cycle will be inhibited. ⒥ Monitor the oscilloscope waveform while slowly increasing the frequency of the audio signal generator to
10 000 Hz, while maintaining its output at +10 dBm. ⒦ The inhibited portion of the audio's positive half-cycle shall decrease as the audio frequency is increased. ⒧ Set Test power supply's output to 0.0 vdc. ⒨ Set the audio signal generator's frequency to 1000Hz, at an output level of +10 dBm. ⒩ Oscilloscope waveform should be a symmetrical 1000Hz sine wave that is centred on the zero vdc
reference.
C5.8 AUDIO/MODULATION DEPTH CONTROL Verify the amplitude of the modulating audio, which ultimately determines the modulation depth, can be controlled and the 1.0dB high frequency roll-off point occurs at the selected audio frequency as follows: ⒜ Verify requirements of paragraph C5.1 and C5.4 are being met. ⒝ Connect the positive output of the test setup's Test power supply to J1.1, by setting the test setup's Test
switch to GAIN CONTROL. ⒞ Set output voltage of the Test power supply to precisely 9.0 vdc. ⒟ Connect an oscilloscope between TP8 of the modulator driver PCB and ground.
- 37 -
MODULATOR DRIVER PCB
⒠ Set audio generator's frequency to 1000 Hz, at an output level of +10 dBm. ⒡ Reduce the modulating audio's amplitude to zero by setting the modulator driver PCB's AUDIO
potentiometer (R34) fully counter clockwise (minimum of four turns). ⒢ Oscilloscope indication should be a nominal +1.65 vdc trace. ⒣ Slowly adjust the modulator driver PCB's AUDIO potentiometer clockwise and note a 1000 Hz audio, that
increases in amplitude as the AUDIO potentiometer is adjusted, is superimposed on +1.65 vdc reference level. ⒤ Stop clockwise adjustment of the AUDIO potentiometer as the audio waveform reaches 0.0 vdc and it
starts to distort (flatten) and then adjust for an undistorted audio waveform that sits just above 0.0 vdc. The oscilloscope waveform should be similar to example in figure C-4 with a peak-to-peak amplitude of 3.2 volts.
Audio = 1000Hz 0.5 ms/div, 1.0 V/div, Scale Centre = 0.0 vdc Figure C-4 Filtered Audio/Control Waveform
⒥ Monitor the oscilloscope waveform and sweep the frequency of the audio generator form 30 Hz thru 20
kHz. Maintain output level of the audio generator at +10 dBm.
⒦ The amplitude of the audio waveform should not change appreciably until the roll-off frequency selected by
low pass filter switch S1 is reached and then it should decrease quite rapidly.
⒧ Set audio generator's frequency to 1000 Hz, at an output level of +10 dBm. ⒨ Oscilloscope display should be an undistorted 1000 Hz, 3.2 volts peak-to-peak, audio waveform that sits
just above 0.0 vdc. C5.9 CARRIER LEVEL REFERENCE CONTROL Check the dc voltage that ultimately determines the transmitter's carrier level can be controlled as follows: ⒜ Verify requirements of paragraph C5.1 and C5.4 are being met.
- 38 -
MODULATOR DRIVER PCB
⒝ Connect the positive output of the test setup's Test power supply to J1-1, by setting the test setup's Test
switch to GAIN CONTROL. ⒞ Set output voltage of the test power supply to precisely 9.0 vdc. ⒟ Set output voltage of the test setup's B-vdc power supply to precisely 72.0 vdc. ⒠ Set audio generator's frequency to 1000 Hz, at an output level of +10 dBm.
⒡ Reduce the modulating audio's amplitude to zero by setting the modulator driver PCB's AUDIO
potentiometer (R34) fully counter clockwise (minimum of four turns).
⒢ Connect digital multimeter between TP9of the modulator driver PCB and ground. ⒣ Multimeter's indication should be 7.2 vdc. ⒤ Connect an oscilloscope between TP11 of the modulator driver PCB and ground. ⒥ Adjust the modulator driver PCB's CAR LVL potentiometer (R37) fully clockwise (minimum of four turns)
and note reference level of oscilloscope's dc trace. ⒦ Adjust CAR LVL potentiometer fully counter clockwise (minimum of four turns) and note reference level of
oscilloscope's dc trace. ⒧ The dc reference level in step ⒦ shall be at least 8% less than the dc reference level noted in step ⒥. ⒨ Adjust the CAR LVL potentiometer to set the oscilloscope's dc trace at +1.8 vdc. ⒩ Monitor dc reference level of oscilloscope's dc trace and slowly increase output voltage of the Test power
supply to +12.5 vdc. ⒪ The reference level for the oscilloscope's dc trace shall increase in proportion to increase in Test power
supply's output voltage. It should be a nominal 2.5 vdc when the Test power supply's output voltage is +12.5 vdc. ⒫ Monitor dc reference level of oscilloscope's dc trace and slowly decrease output voltage of the Test power
supply to 0.0 vdc. ⒬ The reference level for the oscilloscope's dc trace shall decrease in proportion to decrease in Test power
supply's output voltage. It should be a nominal 0.0 vdc when the Test power supply's output voltage is 0.0 vdc. ⒭ Set output voltage of the Test power supply to precisely 9.0 vdc. ⒮ The dc reference level of oscilloscope's dc trace shall return to 1.8 vdc. ⒯ Monitor dc reference level of oscilloscope's dc trace and slowly increase output voltage of the B-vdc power
supply to 79.2 vdc. ⒰ The reference level for the oscilloscope's dc trace shall decrease in proportion to increase in B-vdc power
supply's output voltage. It should be a nominal 1.6 vdc when B-vdc power supply's output voltage is -79.2 vdc.
- 39 -
MODULATOR DRIVER PCB
⒱ Monitor dc reference level of oscilloscope's dc trace and slowly decrease output voltage of the B-vdc
power supply to -64.8 vdc. ⒲ The reference level for the oscilloscope's dc trace shall increase in proportion to decrease in B-vdc power
supply's output voltage. It should be a nominal 2.0 vdc when B-vdc power supply's output voltage is -64.8 vdc. ⒳ Set output voltage of B- vdc power supply to precisely 72.0 vdc. ⒴
The dc reference level of oscilloscope's dc trace shall return to 1.8 vdc. ⒵ Slowly adjust the modulator driver PCB's AUDIO potentiometer (R34) clockwise and note a 1000 Hz audio,
that increases in amplitude as the AUDIO potentiometer is adjusted, is superimposed on the +1.8 vdc reference level. (aa) Stop clockwise adjustment of the AUDIO potentiometer as the audio waveform reaches 0.0 vdc and it starts to distort (flatten) and then adjust it for an undistorted audio waveform that sits just above 0.0 vdc. The Oscilloscope waveform should be similar to example in figure C-5, with a peak-to-peak amplitude of 3.6 volts. (ab) Monitor oscilloscope's waveform and slowly increase output voltage of the Test power supply to +12.5 vdc. (ac) The oscilloscope waveform shall be an undistorted audio that sits just above 0.0 vdc and increases in proportion to the increase in the Test power supply's output voltage. The peak-to-peak voltage of the audio waveform should be a nominal 5.0 volts [twice the dc reference voltage noted in step ⒪].
Audio = 1000 Hz 0.5 ms/div, 1.0 V/div, Scale Centre = 0.0 vdc Figure C-5 Carrier Level Reference Waveform
(ad) Monitor oscilloscope's waveform and slowly decrease output voltage of the Test power supply to +5.5 vdc. (ae) The oscilloscope waveform shall be an undistorted audio that sits just above 0.0 vdc and decreases in proportion to the decrease in the Test power supply's output voltage.
- 40 -
MODULATOR DRIVER PCB
(af) Set output voltage of the Test power supply to precisely 9.0 vdc. (ag) The oscilloscope waveform shall be an undistorted audio that sits just above 0.0 vdc and has a peak-to-peak voltage of 3.6 volts. C5.10 VARIABLE PULSE WIDTH GENERATOR CHECK Check the output of the variable pulse width generator circuit as follows: ⒜ Verify requirements of paragraphs C5.1 thru C5.6 are being met. ⒝ Switch off audio signal generator's output. ⒞ Verify Test power supply is set to 9.0 vdc. ⒟ Connect an oscilloscope between TP10 of mod driver PCB and ground. ⒠ Oscilloscope indication should be a waveform similar to example depicted in figure C-6.
It should be a series of 0.0 to 15.0 vdc rectangular waveform with nominal on-times (15 vdc) of 42 percent.
C5.11 SHUTBACK/MOD DRIVE ENABLE CONTROL CHECK Verify the mod drive output is clamped to ground when a shutback signal is applied or the mod drive enable signal is removed: ⒜ Verify requirements of paragraphs C5.1 thru C5.7 are being met. ⒝ Verify audio signal generator is switched off. ⒞ Verify Test power supply is set to 9.0 vdc. ⒟ Connect an oscilloscope between test setup's MOD DRIVE test point and GND. ⒠ Oscilloscope indication should be a waveform similar to example depicted in figure C-6.
It should be a series of 0.0 to 15.0 vdc rectangular waveform's with 15 vdc (on-time) period being a nominal 42 percent of each rectangular waveform's duty cycle.
- 41 -
MODULATOR DRIVER PCB
2Fpwm = 160 kHz (ƒpwm = 80.0 kHz) 10.0 us/div, 5.0 V/div, Scale Centre = 0.0 vdc Figure C-6 Mod Drive (PWM) Output
⒡ Simultaneously monitor oscilloscope and set test setup's SHUTBACK switch to ON. ⒢ Oscilloscope indication should switch to a waveform that is a 0.0 vdc trace. ⒣ Open the test setup's SHUTBACK switch. ⒤ Oscilloscope indication should switch to the same waveform observed in step ⒟. ⒥ Open the test setup's MOD DRIVE switch. ⒦ Oscilloscope indication should switch to a waveform that is a 0.0 vdc trace. ⒧ Set test setup MOD DRIVE switch to ENABLE. ⒨ Oscilloscope indication should switch to the same waveform observed in step ⒟.
C5.12 MOD DRIVE FAULT CHECK Verify mod drive fault detector circuit will inhibit mod drive output, when the mod drive's on/off ratio would cause an excessive rf carrier level to be produced by the associated transmitter, as follows: ⒜ Verify the requirements of paragraphs C5.1 thru C5.8 are being met. ⒝ Verify audio signal generator is switched off. ⒞ Verify Test power supply is set to 9.0 vdc. ⒟ Connect oscilloscope between test setup's MOD DRIVE test point and GND. ⒠ Oscilloscope indication should be a waveform similar to example depicted in figure C-6.
- 42 -
MODULATOR DRIVER PCB
It should be a series of 0.0 vdc to 15.0 vdc rectangular waveform's with 15 vdc (on-time) period being a nominal 42 percent of each rectangular waveform's duty cycle. ⒡ Increase Test pwr supply's output to 12.0 vdc. ⒢ Relay K1 of mod driver shall de-energize and oscilloscope indication shall switch to a waveform that is a
0.0 vdc trace. ⒣ Connect oscilloscope between TP10 of mod driver PCB and ground. ⒤ Oscilloscope indication should be a waveform similar to example depicted in figure C-6 except its 15 vdc
(on-time) period should be a nominal 60 percent of each rectangular waveform's duty cycle. ⒥ Connect oscilloscope between test setup's MOD DRIVE test point and GND. ⒦ Set output of Test power supply to 9.0 vdc. ⒧ Relay K1 should energize and oscilloscope indication shall return to a series of 0.0 vdc to 15.0 vdc
rectangular waveform's with a nominal 42 percent 15 vdc (on-time) period during rectangular waveform's duty cycle.
- 43 -
MODULATOR DRIVER PCB
Figure C_7
Test Setup for
- 44 -
Modulator Driver PCB
MODULATOR DRIVER PCB
Table C-1 Test Equipment
NOMENCLATURE
PART, MODEL, OR TYPE NUMBER (EQUIVALENTS MAY BE USED)
APPLICATION
Digital Multimeter
3 1/2 digit, ad/dc volts (10Mohm input),ohms and amperes, ±0.5% accuracy, beckman 3010
Testing and maintenance
Frequency Counter
5ppm up to 10 MHz Fluke Model 1900A
Measure PWM frequency
Oscillo Scope
Any good quality oscilloscope with a calibrated time base. Testing and maintenance Tektronix Model T922
Function Generator
10 Hz - 10 MHz, 600 ohms, 0 to 15 dBm Sine, square and triangular waveform with dc offset. Hewlett Packard model 651B
2Fpwm square wave signal source or 600 ohm balanced audio source during testing.
15 vdc Power Supply (Fixed)
15 vdc, 1.0 A
Test setup's +15 vdc Power Supply. + 15 vdc voltage source during testing.
15 vdc Power Supply (Fixed)
15 vdc, 1.0 A
Test setup's - 15 vdc Power Supply. - 15 vdc voltage source during testing.
0-15 Vdc Power 0.0 to 15 vdc, 100 mA Supply (Variable)
Test setup's Test Power Supply. Simulate control voltages during testing.
24 vdc Power Supply (Fixed)
Test setup's 24 vdc Power Supply. Unregulated 24 vdc voltage source during testing.
24 vdc, 1.0 A
0-100 vdc Power 0.0 to 100 vdc, 100 mA Supply (Variable)
Test setup's B-vdc Power Supply. B-vdc voltage source during testing.
Test Setup
Provides test circuit for modulator driver PCB.
As depicted in figure C-7
- 45 -
RF POWR AMPLIFIER (250W)
4-3. RF POWER AMPLIFIER (250W) TABLE OF CONTENTS A
PREPARATION
FOR USE
B
CIRCUIT DESCRIPTION
B1
RF POWER MODULE
--------------
B-1
B1.1
MODULATOR/POWER AMPLIFIER
--------------
B-1
B1.1.1
Logic Level Converter
--------------
B-1
B1.1.2
Modulator
--------------
B-1
B1.1.3
Low Pass Filter
--------------
B-1
B1.1.4
Power Amplifier
--------------
B-2
B1.1.5
Current Imbalance Detector
--------------
B-2
B1.1.6
Temperature Sensor
--------------
B-3
B1.1.7
Fault Switch
--------------
B-3
C
MAINTENANCE
C1
MAINTENANCE PHILOSOPHY
--------------
C-1
C2
TEST EQUIPMENT
--------------
C-1
C3
ANTI-STATIC PRECAUTIONS
--------------
C-1
C4
FUNCTIONAL TEST
--------------
C-1
C5
PA FAULT ISOLATION
--------------
C-1
C6
CORRECTIVE MAINTENANCE
--------------
C-1
C6.1
MODULATOR/POWER AMPLIFIER REMOVAL
--------------
C-1
C6.2
DEFECTIVE MOSFET ISOLATION
--------------
C-2
C6.3
MODULATOR/POWER AMPLIFIER DISASSEMBLY
--------------
C-3
C6.4
MOSFET REPLACEMENT
--------------
C-3
C6.5
RF DRIVE TRANSFORMER REPLACEMENT
--------------
C-4
C6.6
MODULATOR/POWER AMPLIFIER REASSEMBLY
--------------
C-4
C6.7
MODULATOR/POWER AMPLIFIER REINSTALLATION
--------------
C-4
- 46 -
RF POWR AMPLIFIER (250W)
B
CIRCUIT DESCRIPTION
B1 RF POWER MODULE The rf power module contains one wideband, modulator/power amplifier assemblies that contribute up to 458 watts of unmodulated, rf carrier power to a transmitter's rf output. B1.1 MODULATOR/POWER AMPLIFIER Modulator/power amplifier can contribute up to 458 watts of unmodulated rf power for RFAMP UNIT. Protection circuits inhibit the mod drive information by clamping it to ground potential (zero rf output) and cause current to flow in the 24 volt dc circuit should an unbalance load be sensed by the current imbalance detector circuit or if the temperature of the heat sink exceeds 85 °C. When the mod drive is being inhibited, the output of the modulator will also be clamped to ground and ensure power MOSFETs in the power amplifier stage do not have any voltage applied to their source/drain connections. B1.1.1 Logic Level Converter The logic level converter consists of transistors Q4, Q5, integrated circuit U1 and their associated components. This circuit shifts the logic 0 reference level, of mod drive input, from zero volts to the B- voltage (-72 volts DC). The zero (logic 0) to +15volt(logic 1) mod drive input will be converted to a -72 volt (logic 0) to -59 volt (logic 1) mod drive signal. The 13 volt differential is the difference in voltage applied to the V- and V+ inputs of U1. This difference is maintained by zener diode A1CR4. B1.1.2 Modulator The modulator consists of power MOSFET Q1, Q2, free-wheeling diode CR1 and the low pass filter circuit. Q1 and Q2 are connected in parallel as high speed switches to the B- (-72 vdc) input. When the logic level converter circuit's output is a logic 1, Q1/Q2 will turn on and apply -72 volts to the low pass filter circuit. When the logic level converter circuit's output is a logic 0, Q1/Q2 will turn off. Free-wheeling diode CR1 maintains current flow in the low pass filter and prevents the source connection of power MOSFETs Q1/Q2 from going positive. NOTE If free wheeling diode CR1 or MOD OUTPUT CROWBAR thyristor Q11 fail, it is probable that modulator power MOSFET transistor Q1/Q2 will also fail. In most instances this will also cause MOSFET driver A1U1 to fail. B1.1.3 Low Pass Filter The low pass filter consists of inductors A2L1, A2L2, A2L3 and capacitors A2C1 thru A2C5. This circuit is connected as a multi-pole tuned filter that shunts the PWM frequency (nominally 80 kHz) component of the mod drive input to ground. The output of the low pass filter will be a negative voltage that has a dc component (rf carrier level information) and an ac component (modulating audio). The amplitude of this negative voltage is proportional to B- voltage at the same radio as the off/on ratio of power MOSFETs Q1/Q2.
When the on/off ratio of mod drive input is constant (carrier level only present) output will be a constant level. When the on/off ratio of mod drive input is constant (carrie level only present) output will be a constant level. When the on/off ratio mod drive input is varying (carrier level plus modulation present) the output will be a negative dc voltage that varies, from the reference voltage present when the on/off ratio is constant, at the modulating audio frequency. The amplitude of the audio component is determined by the amount the on/off ratio of the mod drive varies.
- 47 -
RF POWR AMPLIFIER (250W)
B1.1.4 Power Amplifier The power amplifier consists of power MOSFETs Q3 thru Q10, Free-Wheeling diode CR10 and rf drive splitter transformers T1 and T2. The circuit is connected as two, parallel, push-pull, class 'D', rf power amplifier. Refer to figure B-1 as a guide to understanding the principles of power MOSFET push-pull, class 'D' operation. B1.1.5 Current Imbalance Detector This circuit consists of splitter/current sensing transformer A1T1, CR1, R2 and C3. A1T1 has two primary windings, which are out of phase. When all MOSFETs in the power amplifier stage are satisfactory, current flow through the primary windings will be balanced and the current imbalance circuit will have no influence. If a MOSFET fails, a voltage will be developed across R2 and applied to the MOD DRIVE CROWBAR (Q3).
SIMPLE CLASS 'D' OPERATION If the switch is opened and closed with a 50% duty cycle, a square wave at the switching frequency will result at the filter input. If the filter is designed to pass the switching frequency, but attenuate its harmonics, a sine wave will be applied to the load.
PUSH-PULL CLASS 'D' OPERATION
If S1 and S2 are opened and closed with a 50% duty cycle, a square wave of current, at the switching frequency, be appliedtotopass the primary of the transformer its secondary. If the filter will is designed the switching frequency, and but transformed attenuate itstoharmonics, a sine wave will be applied to the load.
- 48 -
RF POWR AMPLIFIER (250W)
POWER MOSFET CLASS 'D' OPERATION Power MOSFETs can be used to replace the switches as depicted in the simple class 'D' operation and push-pull class 'D' operation examples. It will be noted the switch contacts have been replaced by the phase oriented secondaries of an rf drive transformer. Q1 corresponds to S1-A, Q2 to S1-B, Q3 to S2-B and Q4 to S2-A as depicted in the push-pull class 'D' operation example. Q1 and Q4 turn on/off together and Q2 and Q3 turn on/off together. Figure B-1 Simplified Principle of Class 'D' Operation B1.1.6 Temperature Sensor Thermistor A1RT1 has a negative coefficient, as temperature rises the resistive value of A1RT1 decreases. When the temperature exceeds 85 °C, transistor A1Q1 will turn on and thyristor A1Q3 shall be gate on. The current drain through thyristor A1Q3 will result in the mod drive input to the logic converter being crowbarred to ground. A ground is also applied to the base of transistor A1Q2, A1Q2 will be forward biased which gates on the MOD OUTPUT CROWBAR.
B1.1.7
Fault Switch
Under normal operating conditions transistor A1Q2 is reversed biased, the fault switch circuit will have no influence. Should a current imbalance or high temperature fault occur transistor A1Q2 will turn on. The output on the collector of A1Q2 is passed to the gate of thyristor Q11, Q11 will turn on. The modulator's negative dc voltage shall be clamped to ground providing transient protection for the modulator's power MOSFETs.
- 49 -
RF POWR AMPLIFIER (250W)
C
MAINTENANCE
C1 MAINTENANCE PHILOSOPHY RF AMP UNIT is intended to be removed from the transmitter and placed on a suitable work surface for servicing. C2 TEST EQUIPMENT A digital multimeter is required for checking power MOSFETs in the modulator/power amplifier assemblies An oscilloscope are required when checking the resonant frequency of the rf drive input's tuned circuit. C3 ANTI-STATIC PRECAUTIONS The module contains semiconductor divices that are susceptible to damage from electrostatic discharge. The anti-static precautions must be observed at all times. C4 FUNCTIONAL TEST Functional testing of the module on a work bench requires specialized test equipment not normally available outside of the factory. The only practical method of functional testing the module in the field is to install it in its associated KMW transmitter and verify it is contributing to the transmitter's rf output. The transmitter utilizes fault detection circuits that automatically inhibit the output of an individual PA assembly, within a power module, which is not contributing its share to the transmitter's rf output. C5 PA FAULT ISOLATION The resistance measurements tabulated in table C-1 will aid in isolating a fault to a specific modulator/power amplifier assembly. If a resistance measurement is abnormal, indicating a fault, removal of the modulator/power amplifier assembly is required. C6 CORRECTIVE MAINTENANCE Corrective maintenance for an rf power module consists of resistance measurements and power MOSFET checks. Isolate a defective component or fault in the rf power module as follows: C6.1 MODULATOR/POWER AMPLIFER REMOVAL Remove a modulator/power amplifier assembly from the RF AMP UNIT.
NOTE If free wheeling diode CR1 or mod output crowbar thyristor Q11 fail, it is probable that power MOSFETs Q1/Q2 will also fail. In most cases this will also cause MOSFET driver A2U1 to fail.
- 50 -
RF POWR AMPLIFIER (250W)
Table C-1 Resistance Measurements ( Rf Power Module Fully Assembled)
OHMMETER CONNECTIONS (METER SET TO NON-DIODE POSITION)
OHMMETER INDICATIONS
POSITIVE LEAD
NEGATIVE LEAD
NORMAL
ABNORMAL
TB1-1
Ground
more than 1000 ohms
less than 1000 ohms
Ground
TB1-1
OPEN
SHORT
Ground
TB1-2
OPEN
SHORT
E1,E2
Ground
more than 2000 ohms
SHORT
*Ground
E1,E1,
more than 2000 ohms
SHORT
* Denotes ensure the storage capacitors are discharged by connecting a 50 ohm resistor between the -72 vdc and the chassis (ground)
C6.2 DEFECTIVE MOSFET ISOLATION Isolate MOSFET devices in the modulator/power amplifier assemby using a digital multimeter that is capable of measuring the forward/reverse resistance of a diode, as follows: A MOSFET under test must be turned on by theNOTE application of a dc voltage (between 4.0 and 9.0 vdc) between its gate and source terminals. some digital multimeters have sufficient dc voltage on their test leads when set to 'diode' or 'resistance' test positions. If the digital multimeter to be used falls in this category it may be used as the voltage source. If it does not, a dc voltage source that is between 4.0 and 9.0 vdc must be obtained.
(a) Unsolder and disconnect wiring from the gate terminal of modulator MOSFETs (Q1 and Q2) amplifier MOSFETs (Q3 thru Q10) to be tested.
and power
(b) Verify all MOSFETs to be tested are turned off, by momentarily connecting a jumper between their gate and source terminals. NOTE Because paired MOSFETs are connected in parallel, all MOSFETs must be turned off prior to testing to prevent interaction between the MOSFET under test and other MOSFETs. (c) Measure source/drain resistance, of MOSFET being tested, in both directions. (d) Resistance measurements in step (c) shall be an open circuit in the reverse direction and a diode pedestal in the forward direction. (e) If requirements of step (d) are not met, unsolder and disconnect wiring from the source of MOSFETs that are suspected of being defective and repeat steps (b) thru (d). (f) If requirements of step (d) are still not met, assume the MOSFET being tested is defective. Disassemble the modulator/power amplifier as detailed in paragraph C6.3 and then replace the defective power MOSFET as detailed in paragraph C6.4.
- 51 -
RF POWR AMPLIFIER (250W)
(g) Turn on a MOSFET by momentarily applying a dc voltage (4.0 to 9.0 vdc) between its gate(+) and source(-) terminals.
(h) Measure source/drain resistance of MOSFET in both directions. (i) Resistance measurements in step (h) shall be a short circuit in both directions. (j) Measure resistance between drain terminal of MOSFETs Q1, Q2, Q3, Q5, Q7 and Q9 and the (ground) in both directions. (k) Resistance measurements in step (j) shall be an open circuit in one direction and a diode other direction.
heat sink
pedestal in the
(l) If steps (i) and (k) are satisfied, the MOSFET may be assumed to be serviceable. (m) If requirements of steps (i) and (k) are not met, the MOSFET or, where applicable, its insulating washer may be assumed to be defective. Disassemble the modulator/power amplifier assembly as detailed in paragraph C6.3 and then replace the defective power MOSFET as detailed in paragraph C6.4. C6.3 MODULATOR/POWER AMPLIFIER DISASSEMBLY Disassemble modulator/power amplifier assembly as required for replacement of semiconductors as follows : RF POWER AMP MODULE (a) Remove the seven securing nuts and locking washers from the chassis fixed studs. (b) Remove the leads from the modulator drive filter pcb terminals A and B by loosening the
binding screw.
(c) Carefully lift the power MOSFET mounting plate away for repair. C6.4 MOSFET REPLACEMENT Replace defective MOSFETs as follows: (a) Unsolder the applicable leads of the MOSFET to be replaced, ensure solder is not splattered on the chassis. CAUTION When removing MOSFETs, note color and/or type of insulator between the MOSFET and heat sink. Ensure same type is used when reinstalling. If a thermo compound and mica insulator is being used in lieu of an insulator, ensure thermo compound is clean and mica insulator is not damaged prior to reinstalling MOSFET. (b) Remove attaching hardware from MOSFET to be replaced and remove MOSFET. Note type of insulator between heat sink and MOSFET. (c) Remove insulating sleeve from gate and source lead of removed MOSFET and install them on replacement MOSFET. (d) Position correct insulator on heat sink where mounting holes are properly aligned.
the MOSFETs will be installed, ensuring lead
- 52 -
and
RF POWR AMPLIFIER (250W)
CAUTION When replacing defective MOSFETs ensure that the mounting holes and mounting surface are free from burrs or any sharp projection that could damage the insulating pads and/or plastic sleeves. (e) Set the replacement MOSFETs in the appropriate position on the heat sink, ensuring insulator is installed between the device and the heat sink. (f) Position insulating spacers in the mounting holes of MOSFETs mentioned in step (e) from of the heat sink.
the under side
(g) Reinstall screws of MOSFETs ensuring that screws with Belville washers are torqued to five inch pounds (0.665 Newton meters). (h) Resolder the appropriate leads to the source terminals of the MOSFETs. (i) Verify terminals of MOSFETs, which protrude through the heat sink, are not shorting to the heat sink and the protective plastic sleeve over gate leads of Q1 thru Q10 and source terminals of Q1, Q2, Q4, Q6, Q8 and Q10 are present and not damage. (j) Verify the Chassis is free from solder silvers and other conductive foreign objects. Special attention will be paid to the holes in the heat sink containing MOSFET terminals, the area around the insulated, conductive circuit board. See CAUTION following step (d). (k) Ensure modulator MOSFETs, Q1 and Q2 have protective caps installed and mounting straps CR1 are securely fastened.
for diode
(l) Perform a resistance measurement as detailed in paragraph C6.2 to ensure replacement MOSFETs are serviceable. (m) Resolder leads to gate terminals of MOSFETs that have been replaced. C6.5 RF DRIVE TRANSFORMER REPLACEMENT Replace defective rf drive transformer T1 and/or T2 using the wiring information CAUTION When reinstalling modulator printed circuit board A1, ensure thermistor A2RT1 is properly fitted and seated into the hole located on extruded, finned heat sink chassis directly below the printed circuit board . C6.6 MODULATOR/POWER AMPLIFIER REASSEMBLY Reassemble the power MOSFET mounting plate to the main power amplifier chassis as follow: (a) Carefully place power MOSFET mounting plate on the main power amplifier chassis, taking pinch any circuit wires.
care not to
(b) Connect the two 14 AWG white wires srcinating at modulator MOSFET Q1 and Q2, to terminal A of low pass filter pcb A2. (c) Connect 14 AWG white wire srcinating at TT1, to terminal B of low pass filter pcb A2. (d) Install the seven securing nuts and locking washers on the modulator/power amplifier fixed studs. C6.7 MODULATOR/POWER AMPLIFIER REINSTALLATION Reinstall modulator/power amplifier assemblies in RF AMP UNIT.
- 53 -
MF RADIO BEACON CONTROL PCB
4-4. MF RADIO BEACON CONTROL PCB TABLE OF CONTE NTS A
PREPARATION
B
CIRCUIT DESCRIPTION
B1
MF RADIO BEACON CONTROL PCB
--------------
B-1
B1.1
400Hz 1020Hz Tone circuit
--------------
B-1
B1.2
Internal Tone output on off control and decrease control
--------------
B-1
B1.3
External voice signal input level control and code tone level reduction
--------------
B-1
C
MAINTENANCE
FOR USE
- 54 -
MF RADIO BEACON CONTROL PCB
B
CIRCUIT DESCRIPTION
B1 MF RADIO BEACON CONTROL PCB . This PCB is used to generate the audio tone signal and DC level used to control the modulation voltage. B1.1 400Hz 1020Hz Tone circuit . U1D and its circuitry generate either a 400 or 1020 Hz siganl depending on the position of jumpers. U1A and its circuitry comprise a 1020 Hz active filter and U1C and its circuitry comprise a 400 Hz active filter. B1.2 Internal Tone output on off control and decrease control . The selected tone frequency is fed to Gate U2A which is controlled by the squelch signal that will be present when an external voice signal is used, With no external voice signals is held high at 12V turning the gate on. An external voice signal will cause the gate to turn off and the audio tone will bypass the gate through R64 with a consequent decrease in amplitude. This feature is used when simultaneous voice and code tone modulation is desired with a low level code tone present whenever voice is present. When the voice signal is absent, the code tone will be revert back to its full amplitude. The code signal from Gate U2A is fed through Gate U2B which is controlled by the Keyer at J1-1 ( ATK ) . To select 1020 Hz or 400 Hz tone, install the appropriate jumpers that correspond with the desired frequency. See Beacon Control PCB Schematic and arrangement . Provisions are available for operating the transmitter in the optional emission modes of CW, MCW1, MCW2 . B1.3
External voice signal input level control and code tone level reduction .
The signal to amplifier U4Dcontrol and squelch The output is ofcoupled U4D drives the squelch circuitgate U4AU3. and U4B. the U4B logic voltage at pin 7 will go to a logic 1, or +12 Volts, as the input signal level rises above -28dBm. The logic voltage from pin 7 will cause squelch gate U3 to close and apply the audio signal to AF OUT circuit J5-3 . The squelch signal at pin U4-7 is used to control the automatic code tone level reduction during simultaneous voice and cone tone modulation. The timing for the return to high level IDENT modulation and/or the transmitter keyer may be adjusted by changing the value of R81 according to the following table.
Time
Value
Comments Default
5
sec
470K
8
sec
820K
11 sec
1.2M
R81 Adjust Table.
- 55 -
VDC CONTROL PCB
4-5. VDC CONTROL PCB B
CIRCUIT DESCRIPTION
B1
VDC CONTROL PCB
The VDC control pcb contains a relay control printed circuit board. Relay control circuit will either inhibit or apply the mod drive and B-vdc operating voltage to its associated rf power module.
B2 Relay Control When the transmitter is turned on, the 24 Vdc(Rf On) (A) input will be applied to the relay control pcb. When relay control's associated RF POWER MODULE CONTROL switch (S1) is turned off, the B-vdc input on the contacts of relay K1 will be inhibited. Relay control's associated field effect transistors Q3 and Q4 will be turned on. Transistor Q3 clamps the mod drive (A) output to ground and transistor Q4 applies a ground on the rf relay control (A) output. When relay control's associated RF POWER MODULE CONTROL switch (S1) is turned on, the B-Vdc (A) output will be applied to its associated rf power module. The associated rf power module's charging capacitors will begin charging, thru resistor R1 and thermistor RT1, towards the B-vdc level. When the voltage at J2-3 reaches a nominal -65.0 vdc, transistor A1Q2 will turn on, cause A1Q1 to turn on and energize relay K1. The high current B-Vdc input is then applied to the associated rf power module's charging capacitor to complete the charge and maintain the B-vdc level. At the same time A1Q3 and A1Q4 will turn off and remove the inhibiting ground from the mod drive (A) and rf relay control (A) outputs.
- 56 -
NO MOD DETECTOR
4-6. NO MOD DETECTOR TABLE OF CONTENTS A
PREPARATION
FOR USE
B
CIRCUIT DESCRIPTION
B1
GENERAL DESCRIPTION
--------------
B-1
B2
INSTALLATION
--------------
B-1
B3
CIRCUIT DESCRIPTION
--------------
B-1
C
MAINTENANCE
C1
ADJUSTMENT
--------------
C-1
- 57 -
NO MOD DETECTOR
B
CIRCUIT DESCRIPTION
B1
GENERAL DESCRIPTION
This NMD is a built-in device into AM semi-conductor Transmitter to monitor and compare RF output modulation signal to output alarming signal when non-modulation transmission is made. Alarming signal is enabled by relay contact, and transmitted to remote operating center through remote interface. B2
INSTALLATION
AF IN is connected to transmitter AUDIO INPUT in parallel. . RF OUT MONITOR is connected to RF OUTPUT MONITOR of transmitter. Power source must be 24VDC which is being supplied only when TX ON. B3
CIRCUIT DESCRIPTION
Audio Input Monitoring is designed not to influence input signal with comparatively higher resistor, 51K ohm than Audio Input resistor, 600 ohm. Audio Input signals supplied to J1-10 ~12 are amplified by U1A and transformed to DC by C7, CR2, CR3 and C8 and finally supplied to U2A-2 with allowed DC voltage. AM Modulated RF OUT Monitor Input Signals supplied to J1-9 are monitored by C4, R10, R11, CR1 and C5 and transformed to Audio Signals. Transformed Audio Signals are amplified at U1B and transformed to DC at C9, CR4, CR5 and C10 and finally supplied to U2A-3 with allowed DC voltage according to RF OUT AM Modulation Level. DC Input Signals to U2A-2 and U2A-3 are compared by U2A. Low Level at U2A-1 to drive U3-6.
And if it found non-modulation, it produces
U3 functions as Delay Timer to monitor continuous non-modulation alarm signals with its timer range from 0.5 sec ~ 10 sec. Output at U3-8 is activated to operate TR Q1 when in non-modulation status to drive RELAY K1 to output alarming signal of non-modulation. When alarming signal sounds, red LED DS1 is lit.
C
MAINTENANCE
C1
ADJUSTMENT
VR1 SET = To make + 2VDC at TP1 when 100% modulation is made. ( Normal Level at P/N J1-10~12 with 100% modulation =+10dBm ) VR2 SET = To make +10VDC at TP2 when 100% modulation is made.. (Normal Level at P/N J1-9 with 100% modulation =30Vpp, 0% modulation =15Vpp ) VR3 SET = Factory Set with 5 second when Ex-Factory. ( Delay Time Range for Non-Modulation Alarm Signal Monitoring
- 58 -
= 0.5Sec ~10Sec )
AUTO KEYER
4-7. AUTO KEYER TABLE OF CONTENTS A
PREPARATION
FOR USE
A1
Block Diagram
--------------
A-1
A2
Features
--------------
A-1
A3
Technical Specifications
--------------
A-1
A3.1
DC Power Supply Input
--------------
A-1
A3.2
Setting the Keying Rate
--------------
A-2
A3.3
Setting the No. of Characters
--------------
A-3
A3.4
Setting the Morse Code Character Selection
--------------
A-3
A3.5
Setting the Inter Character Sequence Tone ON/OFF Selection
--------------
A-3
A3.6
Setting the Inter Character Sequence Tone Time Period
--------------
A-3
A3.7
Setting the Buzzer Tone
--------------
A-4
B
CIRCUIT DESCRIPTION
C
MAINTENANCE
- 59 -
AUTO KEYER A PREPARATION FOR USE A1 Block Diagram
A2 Features · Up to 6 Character Morse Code Selection. · Characters selectable between 26 Alphabets, 10 Numbers & 23 Special Characters. · High Speed Contact Closure Relay Output. · Keying Rate Selectable from 55ms. to 250ms. · Inter Character Sequence Tone Time Period selectable from 1 Sec. to 64 Sec. · On – Board LED f or Visual indication of the Transmitted Morse Code. · On – Board Peizo Bu zzer for Audible indication of the Transmitted Morse Code.
A3 Technical Specifications A3.1 DC Power Supply Input · DC Power Supply Input : 7VDC to 40VDC @ 5 Watts. · Voltage Regulator : On – Board , Switching Mode Regulator. · Safety : Fuse Protection and Reverse Polarity Protection. Thermal Shutdown and Current Limit Protection.
- 60 -
AUTO KEYER
AK-09 Automatic Keying Device PCB Layout A3.2 Setting the Keying Rate The Keying Rate of the Morse Code can be set between & including 55ms. to 250ms. in a total of 8 steps. This selection can be done using the Switch Nos. 1 ( Rate 2 ), 2 ( Rate 1 ) & 3 ( Rate 0 ) on the 8 Way Switch SW7. The factory default value for the Keying Rate is set at 125ms. See Table 1. Table 1 - Keying Rate Selection Table 8 Way SW7 Keying Rate
Rate 2
Rate 1
Rate 0
Switch 1
Switch 2
Switch 3
Off
250ms.
Off
Off
166.67ms.
Off
Off
On
125ms.
Off
On
Off
100ms.
Off
On
On
83.33ms.
On
Off
Off
71.43ms.
On
Off
On
62.5ms.
On
On
Off
55ms.
On
On
On
- 61 -
AUTO KEYER A3.3 Setting the No. of Characters The No. of Morse Code Characters can be selected between & including 1 to 6. This selection can be done using the Switch Nos. 4 ( Chr. 2 ), 5 (Chr. 1 ) & 6 (Chr. 0 ) on the 8 Way Switch SW7. The factory default value for the No. of Morse Code Characters is set to 3 Characters. See Table 2. Table 2 - No of Characters Selection Table No. of Characters
8 Way SW7
8 Way SW 7 No 8 (Option)
Note
Chr.2
Chr.1
Chr.0
Switch 4
Switch 5
Switch 6
No Chrs
Off
Off
Off
x
1 Chr
Off
Off
On
x
2 Chrs
Off
On
Off
x
3 Chrs
Off
On
On
x
4 Chrs
On
Off
Off
x
5 Chrs
On
Off
On
x
6 Chrs
On
On
Off
Off
Test Chrs
On
On
On
x
A-Z,0-9,
Test Chrs
On
On
Off
On
Special Characters
A3.4 Setting the Morse Code Character Selection The AKD 616 supports 26 Alphabets from A – Z, 10 Numbers from 0 – 9 & 21 other Special Characters as the Full Set of Valid User Selectable Morse Code Characters. The setting of the same is done using the 6 Way Switches SW1 to SW6. The factory default Character Selections for the Switches SW1 to SW6 is set as AKD 616. The Morse Code will be transmitted in the sequence starting from the switch setting of Switch SW1 to the switch setting of Switch SW6. See Table 3. A3.5 Setting the Inter Character Sequence Tone ON/OFF Selection S7-7 Switch ON = Inter Character Sequence Tone ON S7-7 Switch OFF = Inter Character Sequence Tone OFF
A3.6 Setting the Inter Character Sequence Tone Time Period The Inter Character Sequence Tone Time Period can be selected between & including 1 Sec. to 64 Sec. in a total of 64 steps. This selection can be done using the 6 Way Switch SW6. This selection is activated only if the Switch No. 8 ( Option ) on the 8 Way Switch SW7 is set in the On position. Setting the Switch No. 8 ( Option ) on the 8 Way Switch SW7 to the Off position will set the Inter Character Sequence Tone Time Period to a fixed Time Period of 10 Sec. See Table 4. Note : With the Switch No. 8 ( Option ) on the 8 Way Switch SW7 is set in the On position ; the maximum No.
- 62 -
AUTO KEYER of Morse Code Characters selectable is only up to 5 Characters. A3.7 Setting the Buzzer Tone The Buzzer Tone of the On-Board Peizo Buzzer can be selected as Silent ( Off ) o r Audible ( On ). This selection can be done using the Jumper Pin JP7(Buzzer). The factory default value for the Buzzer Tone is set to Silent ( Off ).
- 63 -
AUTO KEYER
- 64 -
AUTO KEYER
- 65 -
`
Section 5.
SPECIFICATIONRS of UNIT
- 66 -
`
5-1. 1) 2) 3) 4) 5) 6) 7)
PLL SYNTHESIZER & MODULATION Frequency Range : Frequency Display : Type of Modulation : PWM Frequency : RF Output Power : Output Impedance : Frequency Stability :
DRIVER
PCB
190KHz – 535KHz BCD Switch of frequency in front Panel. PWM (Pulse Width Modulator) 80KHz (Square Wave) 14V p-p 50 ohm ±1PPM
8) Modulation Drive Voltage : 14V p-p (Square Wave) 5-2. 1) 2) 3) 4)
5-3.
RF AMPLIFIER
MODULE
RF Input Level : Modulation Level : Modulation Capability : RF Output Power :
POWE SUPPLY UNIT
1) Power Input Voltage : 2) Output Voltage:
3) Power Consumption:
& LOW PASS FILTER
14V p-p (Square Wave) 14V p-p (Square Wave) 100% (Variable for 0% to 100%) 317Vp-p (Square Wave)
(KMW-250RB-PS) AC 220V. Single Phase, 50Hz or 60Hz -72Vdc at 10A +24Vdc at 2A +15Vdc at 1A -15Vdc at 1A 600 watt
- 67 -
`
Section 6.
SCHEMATICS & PART LIST
- 68 -
`
KMW 250RB SCHEMATICS LIST NO
SCHEMATICS NAME
PAGE
1
KMW‐250RB MF RADIO BEACON FULL ASSEMBLY FRONT VIEW
‐‐‐‐‐‐‐‐‐‐
1
2
KMW‐250RB MF RADIO BEACON BLOCK DIAGRAM
‐‐‐‐‐‐‐‐‐‐
2
3
KMW‐250RB MF RADIO BEACON OVERALL SCHEMATIC DIAGRAM
‐‐‐‐‐‐‐‐‐‐
3
KMW‐250RB POWER SUPPLY UNIT ( KMW-250RB-PS ) 4
KMW‐250RB POWER SUPPLY UNIT FRONT REAR VIEW
‐‐‐‐‐‐‐‐‐‐
4
5
KMW‐250RB POWER SUPPLY UNIT SCR PS CONTROL PCB
‐‐‐‐‐‐‐‐‐‐
5
6
KMW‐250RB POWER SUPPLY UNIT VDC CONTROL PCB
‐‐‐‐‐‐‐‐‐‐
9
7
KMW‐250RB POWER SUPPLY UNIT LOW VOLT PS
‐‐‐‐‐‐‐‐‐‐
11
KMW‐250RB RF AMP UNIT ( KMW-250RB-PA ) 8
KMW‐250RB RF AMP UNIT FRONT REAR VIEW
‐‐‐‐‐‐‐‐‐‐
13
9
KMW‐250RB RF AMP UNIT CONTROL PCB
‐‐‐‐‐‐‐‐‐‐
16
10
KMW‐250RB RF AMP UNIT MODULATOR DRIVER PWB 1‐ 2
‐‐‐‐‐‐‐‐‐‐
20
11
KMW‐250RB RF AMP UNIT MODULATOR DRIVER PWB 2‐ 2
‐‐‐‐‐‐‐‐‐‐
21
12
KMW‐250RB RF AMP UNIT RF DRIVE PCB ( DDS OSC )
‐‐‐‐‐‐‐‐‐‐
25
13
KMW‐250RB RF AMP UNIT MODULATOR / RF AMP ( 250W )
‐‐‐‐‐‐‐‐‐‐
29
14
KMW‐250RB RF AMP UNIT LOW PASS FILTER PCB
‐‐‐‐‐‐‐‐‐‐
32
15
KMW‐250RB RF AMP UNIT FWD / REF DETECTOR
‐‐‐‐‐‐‐‐‐‐
34
16
KMW‐250RB RF AMP UNIT NO MOD DETECTOR PCB
‐‐‐‐‐‐‐‐‐‐
36
17
KMW‐250RB RF AMP UNIT AUTO KEYER PCB
‐‐‐‐‐‐‐‐‐‐
38
- 69 -
`
NO
SCHEMATICS NAME
PAGE
KMW‐250RB ANTENNA CHANGE UNIT ( KMW-250RB-CU ) 18
KMW‐250RB ANTENNA CHANGE UNIT FRONT REAR VIEW
‐‐‐‐‐‐‐‐‐‐
41
19
KMW‐250RB ANTENNA CHANGE UNIT
‐‐‐‐‐‐‐‐‐‐
42
20
KMW‐250RB ANTENNA CHANGE UNIT TX AUTO CHANGE PCB
‐‐‐‐‐‐‐‐‐‐
44
21
KMW‐250RB ANTENNA CHANGE UNIT FRONT PCB
‐‐‐‐‐‐‐‐‐‐
47
22
KMW‐250RB SYSTEM WIRING DIAGRAM
‐‐‐‐‐‐‐‐‐‐
49
- 70 -
`
KMW 250RB OPTIOINAL SCHEMATICS LIST NO
SCHEMATICS NAME
PAGE
1
KMW‐250RB OFF AIR REMOTE BEACON MONITOR FRONT VIEW
‐‐‐‐‐‐‐‐‐‐
50
2
KMW‐250RB OFF AIR REMOTE BEACON MONITOR
‐‐‐‐‐‐‐‐‐‐
51
3
KMW‐250RB OFF AIR REMOTE BEACON MONITOR MONITOR AMP
‐‐‐‐‐‐‐‐‐‐
53
4
KMW‐250RB OFF AIR REMOTE BEACON MONITOR METER AMP
‐‐‐‐‐‐‐‐‐‐
55
- 71 -
`
PARTS. NO
DESCRIPTION
STANDARD
‐
SCR P/S CONTROL PCB
‐
VDC CONTROL PCB
‐
LOW VOLT P/S
C1,C2,C3
CERAMIC CAPACITOR
103pF 1KV
3
C4
ELECT CAPACITOR
6800uF 100V
1
C5
BOX CAPACITOR
105pF 100V
1
C6
M.F CAPACITOR
1.8uF 250V
1
D1,D2
DIODE
1N4004
2
F1
FUSE
7A
1
F2,F3
FUSE / FUSE HOLDER
3A
2
FAN1,FAN2
FAN
92 * 92
2
J1
HRS CONNECTOR
1300 ‐ 20PIN
1
J2
3P AC RECEPTACLE
AC ‐ 012
1
L1
CHOKE
10mH 10A
1
LD1
LED
5phi GREEN
1
M1
METER
HS‐310 FS=DC 15A, 1mA 50mV
1
M2
METER
HS‐310 FS=DC 100V
1
M3
METER
HS‐310 100uA
1
R1,R4
W.W RESISTOR
250ohm 50W
R2
RESISTOR
4.7Kohm 2W
1
R3
M.F RESISTOR
33Kohm 1/2W
1
R5
M.F RESISTOR
4.7Kohm 1/2W
1
RL1
RELAY
VF‐24 DC24V
1
RL2
RELAY
SZY‐LY2 DC24V
1
S1
TOGGLE SWITCH
ST215N
1
S2
WINK SWITCH
2 CIRCUIT 4GANGED
1
S3
WINK SWITCH
2 CIRCUIT 2GANGED
1
ST1
SHUNT
HS‐S‐01 15A 50mA
1
T1
TRANSFORMER
1KVA
1
- 6 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
D1
DIODE
1N1190R
1
SCR1,SCR2
SCR
C228M T30NU 06 DU
2
ZNR1,ZNR2
ZNR
23G 181K
2
ZNR3,ZNR4
ZNR
23G 331K
2
- 7 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
C1
TANTAL CAPACITOR
47uF 35V
1
C2
BOX CAPACITOR
102pF 63V
1
C3,C9
BOX CAPACITOR
224pF 63V
2
C4
BOX CAPACITOR
103pF 63V
1
C5,C6
TANTAL CAPACITOR
1uF 50V
2
C7
TANTAL CAPACITOR
6.8uF 35V
1
CR1‐CR3
DIODE
1N4004
3
CR4
ZENER DIODE
1N4740 10V 1W
1
CR5
ZENER DIODE
1N5363 30V 5W
1
CR6‐CR10
DIODE
1N4004
5
F1‐F2 2
RESISTOR
TYPE FUSE 0.5A
2
J1
MOLEX CONNECTOR
5273,5239 8PIN
1
Q1,Q2
TRANSISTOR
2N3439
2
R1
M.F RESISTOR
33ohm 1/2W 1%
1
R2,R13
M.F RESISTOR
10Kohm 1/2W 1%
2
R3,4,15,16,20
M.F RESISTOR
3.3Kohm 1/2W 1%
5
R5
M.F RESISTOR
5.6Kohm 1/2W 1%
1
R6,R9
M.F RESISTOR
18Kohm 1/2W 1%
2
R7
M.F RESISTOR
560Kohm 1/2W 1%
1
R8
VARIABLE RESISTOR
WR 10Kohm 1/2W 1%
1
R10
M.F RESISTOR
47 Kohm 1/2W 1%
1
R11
M.F RESISTOR
1Kohm 1/2W 1%
1
R12 1
M.F RESISTOR
330 Kohm 1/2W 1%
1
R14,17,18
M.F RESISTOR
100 Kohm 1/2W 1%
3
R19
M.F RESISTOR
33 Kohm 1/2W 1%
1
R21
M.F RESISTOR
180Kohm 1/2W 1%
1
U1
I.C
7815
1
U2
I.C
MC3403
1
‐
I.C SOCKET
ROUND TYPE 14PIN
1
‐
P.C.B(1.6T EPOXY)
111.4 X 66
1
- 8 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
C1
BOX CAPACITOR
104pF 63V
1
C2
TANTAL CAPACITOR
6.8
F 35V
1
C3,C4
BOX CAPACITOR
103pF 63V
2
C5
BOX CAPACITOR
224pF 63V
1
C6
BOX CAPACITOR
102pF 63V
1
CR1‐CR4
DIODE
1SS83
6
J1
MOLEX CONNECTOR
5273,5239 5PIN
1
J2
MOLEX CONNECTOR
5273,5238 6PIN
1
Q1
TRANSISTOR
2N 2907
1
Q2
TRANSISTOR
2N 3440
1
Q3,Q4
F.E.T.
IRF 520
2
R1
M.F RESISTOR
3.3ohm 1/2W 1%
1
R2
M.F RESISTOR
47 Kohm 1/2W 1%
1
R3
M.F RESISTOR
20 Kohm 1/2W 1%
1
R4
M.F RESISTOR
1.8Kohm 1/2W 1%
1
R5
M.F RESISTOR
33Kohm 1/2W 1%
1
R6
M.F RESISTOR
1.8Kohm 2W 1%
1
R7,R8,R10,R11
M.F RESISTOR
1 Mohm 1/2W 1%
4
R9
M.F RESISTOR
560 ohm 1/2W 1%
1
‐
P.C.B (1.6T EPOXY)
110 X 55
1
- 10 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
BD1
BRIDGE DIODE
KBPC 603
1
C1‐C5
TANTAL CAPACITOR
6.8uF 35V
5
C6,C7
ELECT CAPACITOR
1000uF 50V
2
C8
ELECT CAPACITOR
2200uF 50V
1
CR1
ZENER DIODE
20V 1W
1
CR2
ZENER DIODE
1N5357 20V 5W
1
Q1
TRANSISTOR
MJ10012
1
Q2
TRANSISTOR
TIP147TU, MJ11015G
1
R1
M.F RESISTOR
4.7 Kohm 1/2W
1
R2
M.F RESISTOR
330 ohm 1/2W
1
TB1‐TB2
TERMINAL BOARD
SA‐9H 4 PIN
2
U1
REGULATOR I.C
7915
1
U2
REGULATOR I.C
78T15ACT
1
‐
TR SOCKET
TO‐3
2
‐
HEAK SINK
105 X 30 X150
- 12 -
Q'TY REMARK
1SET
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
‐
CONTROL PCB
1
‐
MOD DRIVER PCB
1
‐ ‐
RF DRIVE PCB ( DDS OSC )
1
RF DRIVE AMP
1
‐
MODULATOR / RF POWER AMP (250W)
1
‐
L.P.F PCB
1
‐
FWD / REF DETECTOR
1
‐
NO MOD DETECTOR PCB
1
‐
AUTO KEYER PCB
C1,C2
BOX CAPACITOR
222pF 63V
2
C3
BOX CAPACITOR
102pF 63V
1
C4,C5,C6
NOT USED
C7
WIMA CAPACITOR
105pF 100V
1
C8
ELECT CAPACITOR
22000uF 100V
1
C9
MF CAPACITOR
562pF 100V
1
CT1
HALL SENSOR
DJC‐1LM 50A 4V
1
D1-D8
DIODE
1N4004
8
FAN1
FAN
AC110V, 120 x 120,
1
FAN2
FAN
AC110V, 92 x 92,
1
J1
HRS CONNECTOR
J2
RF CONNECTOR
BNC-RBC
1
J3
RF CONNECTOR
M-BR ( S0-239 )
1
J4 L1
HRS CONNECTOR CHOKE
1300 ‐ 34pin 47uH
1 1
LD1,LD7
LED
5phi GREEN
2
LD2‐LD5
LED
5phi RED
4
LD6
LED
5phi YELLOW
1
R1
M.F RESISTOR
6.8Kohm 2W
1
R2
M.F RESISTOR
6.8Kohm 1/2W
1
1
1300 ‐ 20pin
- 14 -
1
`
PARTS. NO
DESCRIPTION
STANDARD
R3
M.F RESISTOR
2.4Kohm 2W
1
R4‐R6
M.F RESISTOR
3.3Kohm 1/2W
3
R7
M.F RESISTOR
10Kohm 1/2W
1
R8
M.F RESISTOR
330ohm 1/2W
1
R9
W.W RESISTOR
50ohm 50W
1
R10,R12
M.F RESISTOR
4.7Kohm 2W
2
R11
M.F RESISTOR
100Kohm 1/2W
1
R13
M.F RESISTOR
270ohm 1/4W
1
R14
M.F RESISTOR
120ohm 1/2W
1
R15
M.F RESISTOR
10ohm 20W
1
R16
M.F RESISTOR
1.1ohm 4W
1
RL1
RELAY
DS1E-ML2-DC24V
1
RL2-3
RELAY
DS2E-M-DC24V
2
S1
TOGGLE SWITCH
8A4001
1
S2
WINK SWITCH
2 Circuit 2 Solo Momentary
1
S3
WINK SWITCH
2 Circuit 3 Ganged Linkage
1
S4,S5,
TOGGLE SWITCH
MT105D
2
S6,
BCD Pushwheel Switch
PF-43
T1
TRANS
2T:12T
1
TP1
TEST POINT JACK
JT-602A-R ( Tip Jack )
1
U1
I.C
7815
1
VR1
VARIABLE RESISTOR
RV30Y 10Kohm
1
- 15 -
Q'TY REMARK
1set
`
PARTS. NO C1, C10, C12,C23
DESCRIPTION
STANDARD
Q'TY REMARK
BOX CAPACITOR
105pF 63V
8
C2,C3
BOX CAPACITOR
223 pF63V
2
C4,C5,C11,C55
BOX CAPACITOR
473 pF63V
4
C6,C7
BOX CAPACITOR
823 pF63V
2
C8,C16,C61
BOX CAPACITOR
103 pF63V
3
C9
TANTAL CAPACITOR
33 uF35V
1
C13,C54
TANTAL CAPACITOR
10 uF35V
2
C14,C35,C43,C45
BOX CAPACITOR
224pF 63V
4
C15
BOX CAPACITOR
474 pF63V
1
C46,C59,C62,C63
C17‐C19,C25‐C28, C32‐C33,C39,C40,
18 BOX CAPACITOR
104pF 63V
C20
TANTAL CAPACITOR
2.2uF 35V
1
C21
TANTAL CAPACITOR
1uF 35V
1
C24,C30,C37
WIMA CAPACITOR
100pF 100V
3
C29,C36
BOX CAPACITOR
102pF 63V
2
C31,C38
BOX CAPACITOR
472pF 63V
2
C47,C48,C52
TANTAL CAPACITOR
47uF 35V
3
C49
TANTAL CAPACITOR
4.7uF 35V
1
C57
TANTAL CAPACITOR
22uF 35V
1
C58
TANTAL CAPACITOR
33Uf 35V
1
DIODE
IN4004
15
DIODE
IN4148
18
D15
ZENER DIODE
IN4736 6.8V 1W
1
J1
MOLEX CONNECTOR
5273,5239
1
J2,J3,J4
MOLEX CONNECTOR
5273,5239 3PIN
3
C44,C50,C51,C53, C60,C64,C65
D1,D2,D4‐D8, D14,D26‐D28, D30‐D33 D3,D9‐D13, D16‐D25,D29 D34
- 17 -
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
J5,J6
MOLEC CONNECTOR
5273 10PIN
1
L1
CHOKE
100uH
1
PC1,PC2
PHOTO COUPLER
PC817
2
Q1
TRANSISTOR
SD986
1
Q10
TRANSISTOR
A1023
1
Q2,Q4,Q8
TRANSISTOR
2SC2235
3
Q3,Q9
TRANSISTOR
2SC3198
2
Q5,Q6,Q7
TRANSISTOR
MPSA13
3
M.F RESISTOR
10Kohm 1/4W
26
R51,R63,R65,R75, R76,R84,R85
M.F RESISTOR
100Kohm 1/4W
11
R4,R82
M.F RESISTOR
10Kohm 1/4W 1%
2
M.F RESISTOR
330Kohm 1/4W
5
R6,R50,R67,R78, R79,R86
M.F RESISTOR
47Kohm 1/4W
6
R7
M.F RESISTOR
68Kohm 1/4W
1
R8,R60
M.F RESISTOR
6.8Kohm 1/4W
2
R9
M.F RESISTOR
12Kohm 1/4W
1
R18
M.F RESISTOR
1Mohm 1/4W
1
M.F RESISTOR
4.7Kohm 1/4W
8
R30
M.F RESISTOR
1.8Kohm 1/4W
1
R14
M.F RESISTOR
39Kohm 1/4W
1
R15
M.F RESISTOR
5.6Kohm 1/4W
1
R16,R62
M.F RESISTOR
1.2Kohm 1/4W
2
R20
M.F RESISTOR
4.7Kohm 1/4W
1
R1,R2,R10‐R12,R17, R19,R23,R29, R31,R33,R34, R37‐R39,R41, R44,R46,R48, R49,R52,R53, R55,R69,R71,R83 R3,R35,R36,R43,
R5,R22,R27 R73,R74
R13,R24,R25,R28 R66,R68,R87,R88
- 18 -
`
Q'TY REMARK
PARTS. NO
DESCRIPTION
STANDARD
R21
JUMPER
0ohm
1
R26,R40,R47,R56
M.F RESISTOR
1.5Kohm 1/4W
4
R32
M.F RESISTOR
75ohm 1/4W
1
R42
M.F RESISTOR
20Kohm 1/4W
1
R45,R54
M.F RESISTOR
86.6Kohm 1/4W
2
R57
M.F RESISTOR
1Kohm 1/4W
1
R58
M.F RESISTOR
560ohm 1/4W
1
R59
M.F RESISTOR
56Kohm 1/4W
1
R61
M.F RESISTOR
8.2Kohm 1/4W
1
R64
M.F RESISTOR
22Kohm 1/4W
1
R72,R77
M.F RESISTOR
15Kohm 1/4W
2
R80,R81
M.F RESISTOR
470Kohm 1/4W
2
U1,U4
I.C
LM324
2
U2,U3
I.C
CD4066
2
U13
I.C
7812
1
U5,U7
I.C
4049
2
U6,U9,U12
I.C
4558
3
U8
I.C
AD 633JN
1
U10,U11
I.C
OP07
2
VR1
V.R
CT‐9 10Kohm
1
VR2,VR6,VR7
V.R
CT‐9 20Kohm
3
VR3
V.R
CT‐9 500Kohm
1
V.R
CT‐9 5Kohm
4
VR8,VR9
V.R
CT‐9 100Kohm
2
VR10,VR11
V.R
CT‐9 2Kohm
2
‐
I.C SOCKET
ROUND TYPE 8PIN
8
I.C SOCKET
ROUND TYPE 14PIN
4
‐
I.C SOCKET
ROUND TYPE 16PIN
2
‐
P.C.B (1.6Y EPOXY)
155 X 120
1
VR4,VR5,VR12 VR13
- 19 -
`
PARTS. NO
DESCRIPTION
STANDARD
C1
BOX CAPACITOR
103pF 63V
1
C2‐C7
TANTAL CAPACITOR
6.8
6
C8
M.F CAPACITOR
224pF 250V
1
C9
BOX CAPACITOR
473pF 63V
1
C10
TANTAL CAPACITOR
22
F 35V
1
C11,C17
BOX CAPACITOR
104pF 63V
2
C12,C15,16
MICA CAPACITOR
680pF 500V
3
C13
BOX CAPACITOR
222pF 63V
1
C14
MICA CAPACITOR
120pF 500V
1
C18,C23,C25
BOX CAPACITOR
103pF 50V
3
C19
BOX CAPACITOR
472pF 63V
1
C20,C21
BOX CAPACITOR
104pF 63V
2
C22
TANTAL CAPACITOR
1.0
F 50V
1
C24,C29
BOX CAPACITOR
102pF 63V
2
C26
MICA CAPACITOR
470pF 500V
1
CR1,CR7‐CR8
HAT CARRIER DIODE
1N5711
3
CR2‐CR6
DIODE
1N4148
5
CR9‐CR13
DIODE
1N4148
5
DS1
L.E.D
5
YELLOW
1
J1
MOREX CONNECTOR
5273, 5239 12 PIN
1
J2
MOREX CONNECTOR
5273, 5239 8 PIN
1
J3
RF CONNECTOR
BNC‐RB
1
K1
RELAY
D2A 120000
1
L1‐L6
FERRITE BEAD
Q1
P‐CH FET
J103 (2N4360)
1
Q2
TRANSISTOR
2N2222
1
Q3
TRANSISTOR
2N2219
1
F 35V
Q'TY REMARK
6
- 22 -
`
PARTS. NO
DESCRIPTION
STANDARD
R1‐R2
M.F RESISTOR
300 ohm 1/2W
2
R3‐R4
M.F RESISTOR
10 Kohm 1/2W
2
R5
M.F RESISTOR
33 Kohm 1/2W
1
R6
VARIABLE RESISTOR
WR 50K
1
R7‐R11
M.F RESISTOR
1 Kohm 1/2W
5
R12‐R13
M.F RESISTOR
1.5 Kohm 1/2W
2
R14
M.F RESISTOR
15 Kohm 1/2W
1
R15‐R16
M.F RESISTOR
10 Kohm 1/2W
2
R18‐R19
M.F RESISTOR
10 Kohm 1/2W
2
R17,R34
VARIABLE RESISTOR
WR 1K
2
R20,R27
M.F RESISTOR
120 Kohm 1/2W
2
R21
M.F RESISTOR
150 Kohm 1/2W
1
R22,R35
M.F RESISTOR
180 Kohm 1/2W
2
R23,R26
M.F RESISTOR
270 Kohm 1/2W
2
R24,R25
M.F RESISTOR
390 Kohm 1/2W
2
R28,R29
M.F RESISTOR
10 Kohm 1/2W
2
R30
M.F RESISTOR
1 Mohm 1/2W
2
R32,R42
M.F RESISTOR
3.3 Kohm 1/2W
2
R31,R33,R39,R43
M.F RESISTOR
100 Kohm 1/2W
4
R36,R47
M.F RESISTOR
82 Kohm 1/2W
2
R37
VARIABLE RESISTOR
WR 100K
1
R38,R51
M.F RESISTOR
18 Kohm 1/2W
2
R40,R60
M.F RESISTOR
22 Kohm 1/2W
2
R41,R48
M.F RESISTOR
33 Kohm 1/2W
2
R44
M.F RESISTOR
5.6Kohm 1/2W
1
R45
M.F RESISTOR
1.8Mohm 1/2W
1
R46
M.F RESISTOR
10 Mohm 1/2W
1
R49‐R50
M.F RESISTOR
10 Kohm 1/2W
2
R55,R57
M.F RESISTOR
10 Kohm 1/2W
2
- 23 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
R52,R56,R74
M.F RESISTOR
1 Kohm 1/2W
3
R53
M.F RESISTOR
120 Kohm 1/2W
1
R54,R59
M.F RESISTOR
100 Kohm 1/2W
2
R62,R76
M.F RESISTOR
100 Kohm 1/2W
2
R58,R61
M.F RESISTOR
47 Kohm 1/2W
2
R63,R71
M.F RESISTOR
10 Kohm 1/2W
2
R64
M.F RESISTOR
560 ohm 1/2W
1
R65
M.F RESISTOR
10 ohm 1/2W
1
R66
M.F RESISTOR
330 Kohm 1/2W
1
R67‐R68
M.F RESISTOR
150 Kohm 1/2W
2
R69
M.F RESISTOR
22 Kohm 1/2W
1
R70
M.F RESISTOR
43 Kohm 1/2W
1
R72,R77
M.F RESISTOR
150 Kohm 1/2W
2
R73
M.F REISTOR
1.5 Kohm 1/2W
1
R75
M.F RESISTOR
100 ohm 1/2W
1
R78
M.F RESISTOR
15 Kohm 1/2W
1
R79,R80
M.F RESISTOR
10 Kohm 1/2W
2
R81
M.F RESISTOR
22 Kohm 1/2W
1
S1
DIP SWITCH
KSD02
1
U1
I.C
TL084
1
U2‐U3
I.C
MC3302
2
U4,U6‐U8
I.C
TL082
4
U5
I.C
MC14013
1
U9
I.C
LM319
1
U10
I.C
RM4200A
1
‐
I.C SOCKET
8 PIN (ROUND TYPE)
5
‐
I.C SOCKET
14 PIN (ROUND TYPE)
6
‐
P.C.B (1.6T EPOXY)
243 X 115
1
- 24 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
AR1
RESISTOR NETWORK
M5‐1‐472
1
AR2
RESISTOR NETWORK
M5‐1‐333
1
BOX CAPACITOR
104pF 63V
31
C4
TANTAL CAPACITOR
2.2uF 25V
1
C5,C25,C27, C44,C53,C60
BOX CAPACITOR
103pF 63V
6
C21,C23
MICA CAPACITOR
390pF 500V
2
C24,C29, C30,C31,C35
TANTAL CAPACITOR
10uF 25V
5
C32,C39
BOX CAPACITOR
224pF 63V
2
C36
BOX CAPACITOR
474pF 63V
1
C1,C2,C3,
‐
C6 C20,C22, C26,C28, C33,C34,C38, C46‐C48, C52,C55‐C57
C37,C40,
TANTAL CAPACITOR
10uF 16V
4
C42,C43 C41
TANTAL CAPACITOR
47uF 16V
1
C45,C54
BOX CAPACITOR
102pF 63V
2
C49
BOX CAPACITOR
682pF 63V
1
C50
CERAMIC CAPACITOR
15pF 50V (CH)
1
C51
WIMA CAPACITOR
150pF 100V
1
C58,C59
CERAMIC CAPACITOR
22pF 50V (CH)
2
C60
JUMPER
0ohm
1
CN1
CONNECTOR
A1‐5PA‐2.54DSA
1
CN2
CONNECTOR
A1‐3PA‐2.54DSA
1
D1
DIODE
1N5711
1
D2‐D6
DIODE
1N4938
5
D7,D10
DIODE
1N4148
2
D8,D9,D11
DIODE
1N4004
3
J1
MOLEX CONNECTOR
5273, 5239 12pin
1
J2,J4
CONNECTOR
BNC‐RB
2
J3
MOLEX CONNECTOR
5051, 5045 8pin
1
JP1‐JP3, JP5‐JP7
CONNECTOR
A2-3PA-2.54DSA
6
- 26 -
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
JP4
CONNECTOR
A2-2PA-2.54DSA
4
JP8
CONNECTOR
A2-2PA-2.54DSA
4
L1
CHOKE (TDK)
1.8uH
1
L2,L8,L9
CHOKE
100uH 1A
3
L3‐L7
CHOKE (TDK)
100uH
5
L10,L12
CHOKE (Resistor Type)
1mH
2
L11
Not Used
Q1‐Q4
TRANSISTOR
2N3904
4
Q5
TRANSISTOR
2N2219A
1
Q6
TRANSISTOR
2N2905A
1
Q7‐Q10
TRANSISTOR
2N2222A
4
Q11
TRANSISTOR
2N2907A
1
R1,R6,R8,R9, R26,R51
M.F RESISTOR
100ohm 1/4W
5
R2,R35,R52 R3,R4, R17‐R19 R30,R31,R33 R42,R43,R54
M.F RESISTOR
4.75Kohm 1/4W
3
M.F RESISTOR
1Kohm 1/4W
11
R5
M.F RESISTOR
274ohm 1/4W
1
R7
M.F RESISTOR
1.21Kohm 1/4W
1
R10,R12,R14
M.F RESISTOR
47.5ohm 1/4W
4
R13
M.F RESISTOR
3.92Kohm 1/4W
1
R15
M.F RESISTOR
150ohm 1/4W
1
R16,R28,R29 R45,R46,R56
M.F RESISTOR
10Kohm 1/4W
6
R20
M.F RESISTOR
82.5ohm 1/4W
1
R21
M.F RESISTOR
22ohm 2W
1
R22
M.F RESISTOR
27.4Kohm 1/4W
1
R23
M.F RESISTOR
1.82Kohm 1/4W
1
R24
M.F RESISTOR
3.3Kohm 1/4W
1
R25
M.F RESISTOR
1.5Kohm 1/4W
1
R27
M.F RESISTOR
1Kohm 1/2W
1
- 27 -
`
PARTS. NO
DESCRIPTION
STANDARD
R32
Variable Resistor
CT-9 1Kohm
1
R34
M.F RESISTOR
2.21Kohm 1/4W
1
R36
M.F RESISTOR
33Kohm 1/4W
1
R37,R38
M.F RESISTOR
3.32Kohm 1/4W
2
R39,R44
M.F RESISTOR
22.1Kohm 1/4W
2
R40,R41,R57
M.F RESISTOR
4.7Kohm 1/4W
3
R47
M.F RESISTOR
5.6ohm 1/4W
1
R48-R50
NOT USED
R53
M.F RESISTOR
47Kohm 1/4W
1
S1
DIP SWITCH
KSD09H
1
S2
DIP SWITCH
KSD08H
1
J5
MOLEX CONNECTOR
5051, 5045 10pin
1
J6
MOLEX CONNECTOR
5051, 5045 8pin
1
U1
TCXO
TX-D2‐3.0FX 12MHz
1
U2
PHOTO COUPLER
PC827
1
U3
I.C
MC74 AC04N
1
U4
I.C
ATmega 16L-8AU
1
U5
I.C
AD9852ASVZ
1
U6
I.C
74MC390
1
U7
I.C
MC14526
1
U8
I.C
KIA7027
1
U9
I.C
7805
1
U10
I.C
MC14584
1
U11
I.C
LM3940-3.3
1
U12-U15
NOT USED
U16
I.C
MC14013
1
XT1
X-TAL
8MHz
1
-
I.C Socket
8pin
1
-
I.C Socket
14pin
3
-
I.C Socket
16pin
2
-
HEAT SINK
SY-200
2
-
SHORT PIN
HIF3GA-2.54SP
10
-
P.C.B (1.6T EPOXY)
140 x 133
1
- 28 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
A1
MODULATOR P.C.B
C1‐C2
BOX CAPACITOR
474pF 100V
2
C3‐C4
BOX CAPACITOR
103pF 50V
2
C8‐C11
BOX CAPACITOR
105pF 63V
4
C5
TANTAL CAPACITOR
6.8
F 35V
1
CR1
NOT USED
CR2
ZENER DIODE
1N4742 12V 1W
1
CR3
DIODE
1SS83
1
CR4
ZENER DIODE
1N5350 13V 5W
1
Q1
TRANSISTOR
2N2907A
1
Q2
TRANSISTOR
2N5416, 2N5415
1
Q3
SCR
PCR406, 2N5062G
1
Q4
TRANSISTOR
2N5416
1
Q5
TRANSISTOR
2N2369A
1
R1
M.F RESISTOR
22 Kohm 1/2W
1
R2
M.F RESISTOR
6.8 ohm 1/2W
1
R3,R6,R9,R12
M.F RESISTOR
1 Kohm 1/2W
4
R4,R5,R8,R10
M.F RESISTOR
3.3 Kohm 1/2W
4
R7
CEMENT RESISTOR
2 Kohm 5W
1
R11
RESISTOR
68 ohm 1/2W
1
R13,R14,
RESISTOR
5 ohm 30W
2
R15-R18
RESISTOR
RT1
THERMISTOR
200 Kohm at 25℃
1
T1
TRANSFORMER
FERRITE (2EA)
1
U1
I.C
ICL 7667 CPA
1
U2,U4,
I.C
MIC4451ZT
1
U3,U5,
I.C
MIC4452ZT
1
‐
I.C SOCKET
ROUND TYPE 8 PIN
1
‐
P.C.B (1.6T EPOXY)
122 X 42
1
1SET
4
- 30 -
`
PARTS. NO
DESCRIPTION
A2
LOW PASS FILTER PCB
C1,C2
M.M CAPACITOR
3μF 250V
2
C3‐C4
M.M CAPACITOR
1.8
2
C5
M.M CAPACITOR
0.39
L1 L2
INDUCTOR INDUCTOR
PQ3535 2EA PQ3535‐2EA
1SET 1SET
L3
INDUCTOR
PQ3535‐2EA
1SET
‐
P.C.B (1.6T EPOXY)
310 X 38
1
C1,C2
M.F CAPACITOR
224pF 250V
2
C3
TANTAL CAPACITOR
6.8
1
C4‐C11
M.F CAPACITOR
224pF 250V
8
CR1
POWER DIODE
DSEI60-06A
1
P6KE20CA
8
CR2‐CR9
SUPRESSOR ZENER DIODE
STANDARD
Q'TY REMARK 1SET
F 250V F 250V
‐
F 16V
1
CR10‐CR18
DIODE
MUR415
9
Q1‐Q10
MOS FET
IRFP140N
10
Q11
THYRISTOR (POWER)
2N6509G
1
R1
RESISTOR
3..3 Kohm 1/2W
1
T1
TRANSFORMER
CORE‐4EA
1SET
T2
TRANSFORMER
CORE‐4EA
1SET
TB1
TERMINAL BOARD
YUNG‐PUNG ML.2PIN
1
TB1
TERMINAL BOARD
YUNG‐PUNG ML.6PIN
1
‐
ELECT CAPACITOR
470uF 100V
2
‐
CERAMIC CAPACITOR
474pF 250V
2
‐
HEAT SINK
‐
P.C.B (1.6T EPOXY)
1 170 X 70
- 31 -
1
`
PARTS. NO
DESCRIPTION
STANDARD
C1,C14,C15
MICA CAPACITOR
5100pF 500V
3
C2,C6
MICA CAPACITOR
820pF 500V
2
C3,C17
MICA CAPACITOR
6800pF 500V
2
MICA CAPACITOR
2000pF (1000pF + 1000Pf) 500V
5
C5,C19
MICA CAPACITOR
680pF 500V
2
C7,C21
MICA CAPACITOR
3300pF 500V
2
C8
MICA CAPACITOR
8200pF 500V
1
C9
MICA CAPACITOR
510pF 500V
1
C10
MICA CAPACITOR
10000pF 500V
1
C12
MICA CAPACITOR
1000pF 500V
1
C13
MICA CAPACITOR
3900pF 500V
1
L1,L2
CHOCK COIL
13T
2
L3,L4
CHOCK COIL
23T
2
‐
P.C.B (1.6T EPOXY)
190 X 140
1
C4,C6,C11,C18 C20
- 33 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
C1,C2
MICA CAPACITOR
1800pF 500V
2
CR1‐CR5
DIODE
ISS83
5
L1,L3
CHOKE
22uH
2
L2,L4
CHOKE
1mH
2
R1‐R8
M.F RESISTOR
100ohm 2W
8
J1‐J4
CONNECTOR
BNC‐RB
4
T1
TRANSFORMER
CURRENT RF
1
T2
TRANSFORMER
VOLTAGE RF
1
TB1
TERMINAL BOARD
SA‐9H 4PIN
1
‐
P.C.B (1.6T EPOXY)
70 X 45
1
- 35 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
-
NO MOD Detector Pcb Assy
STANDARD
Q'TY REMARK
C1,2,6,16
Capacitor, Polyester BOX
105 pF 63V
4
C4
Capacitor, Polyester BOX
103 pF 100V
1
C3,7,9,15
Capacitor, Electric
6.8 uF 35V
4
C5
Capacitor, Polyester BOX
102 pF 63V
1
C8,C10
Capacitor, Tantalum
47 uF 25V
2
C11
Capacitor, Polyester BOX
103 pF 63V
1
C12-C14
Capacitor, Polyester BOX
104 pF 63V
3
CR1
Diode
ISS83
1
CR2-CR7
Diode
1N4148
6
DS1
LED
5mm RED
1
K1
RELAY
DS2EM, DC12V 1A
1
J1
CONNECTOR, MOREX
12PIN
1
Q1
TRANSISTOR, NPN
2SC1027Y
1
R1,2,5,6,7, 12,14,15,16
Resistor, Metal Film
51 Kohm 5% 1/4W
9
R3,4,8,9
Resistor, Metal Film
10 Kohm 5% 1/4W
4
R10
Resistor, Metal Film
1 Kohm 5% 1/4W
1
R11
Resistor, Metal Film
100 Kohm 5% 1/4W
1
R13
Resistor, Metal Film
1 Mohm 5% 1/4W
1
R17
Resistor, Metal Film
5.1 Kohm 5% 1/4W
1
R18
Resistor, Metal Film
220 Kohm 5% 1/4W
1
R19
Resistor, Metal Film
3.3 Kohm 5% 1/4W
1
U1,U2
IC, OP AMP, Dual
LM358
2
U3
IC, CMOS, Osc/Timer
MC14541
1
U4
IC, Voltage Regulator
7815, 15V 1A
1
VR1
Resistor, Variable
68WR, 1M ohm 1/2W
1
VR2,VR3
Resistor, Variable
68WR, 100K ohm 1/2W
2
XK1
Socket, Relay
16 pin, Round Type
1
XU1,XU2
Socket, IC
8 pin, Round Type
2
XU3
Socket, IC
14 pin, Round Type
1
1
- 37 -
`
PARTS. NO
DESCRIPTION
STANDARD
AR1
RESISTOR NETWORK
5PX103, M5-1‐103,
1
ARD1-ARD6
DIODE NETWORK
D7-1C, DSN601,
6
BZ1
Magnetic Buzzer
ALP1205S, BTH-5, ( 5V / 12mm )
1
C1,C2,C3, C6,C9,C11,
BOX CAPACITOR
104pF 63V
6
C4,C5,
CERAMIC CAPACITOR
22pF 50V ( CH )
2
C7
ELECTRIC CAPACITOR
100uF 50V
1
C8
ELECTRIC CAPACITOR
330uF 16V
1
C10
ELECTRIC CAPACITOR
22uF 25V
1
CN1 (JTAG)
Pin Header Connector
Dual 10pin ( 2.54mm )
1
CN2 (ISP)
Pin Header Connector
Dual 6pin ( 2.54mm )
1
D1
DIODE
1N4004
1
D2
DIODE
1N5819
1
D3
DIODE
NOT USED, ( 1N4148 )
1
J1
CONNECTOR
5273, 5239 4pin
1
JP1-JP3
Pin Header
A2-2PA‐2.54DSA
3
JP1-JP3
Short Pin
HIF3GA-2.54SP 2pin
3
L1
INDUCTOR
100uH 1A ( Ring Core Type )
1
LD1
LED
3phi Green
1
Q1-Q2
TRANSISTOR
2SC3198GR
2
R,
M.F RESISTOR
47Kohm 1/4W
1
R2
M.F RESISTOR
1Kohm 1/4W
1
R3,R5
M.F RESISTOR
2.2Kohm 1/4W
2
R4,R6
M.F RESISTOR
22Kohm 1/4W
2
RL1
RELAY
NOT USED, ( DS2EM DC5V )
1
S1-S6
DIP SWITCH
KSD06H
6
S7
DIP SWITCH
KSD08H
1
U1
I.C
ATmega16-16AU TQFP
1
U2
I.C
KIA7045
1
U3
I.C
LM2576T-5.0-P
1
XT1
X-TAL
8MHz ( ATS-25/U )
1
XK1
Socket, Relay
16 pin, Round Type
1
- 39 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
-
HEAT SINK ( U3 )
SY-200
1
-
P.C.B (1.6T EPOXY)
120 X 90
1
- 40 -
Q'TY REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
-
FRONT PCB
1SET
-
TX AUTO CHANGE PCB
C1
CERAMIC CAPACITOR
103pF 1KV
1
D3
DIODE
1N4004
1
J1-J4,
CONNECTOR
M-R
4
J5,
HRS CONNECTOR
1300-20pin
1
J6,
HRS CONNECTOR
1300-60pin
1
J7-J8,
HRS CONNECTOR
1300-34pin
2
RL3
RELAY
JQX-40F 2C DC24V
1
1SET
PARTS. NO
DESCRIPTION
STANDARD
BD1
BRIDGE DIODE
KBPC606
D1-2,D4-15
DIODE
1N4004
J3
MOLEX CONNECTOR
5273. 5239 6pin
1
J4
MOLEX CONNECTOR
5273. 5239 7pin
1
J5
MOLEX CONNECTOR
5045. 5051 8pin
1
J6
MOLEX CONNECTOR
5273. 5239 2pin
1
J7
MOLEX CONNECTOR
5273. 5239 12pin
1
J8
HIF CONNECTOR
HIF 3BA-40PA‐2.54DSA
1
RL1,RL2
RELAY
DS2M DC24V
2
RL4
RELAY
SD404B24V
1
RL5
RELAY
DS1ML DC24V
1
RL6
RELAY
DS1ML DC12V
1
RL7
RELAY
DS1M DC12V
1
S1,
SWITCH
MT105D, WTS-3203S,
1
U1
I.C
7812
1
XK5-XK7,
Socket, Relay
14 pin, Round Type
3
XK1,XK2,
Socket, Relay
16 pin, Round Type
2
-
P.C.B (1.6T EPOXY)
170X150
1
- 43 -
Q'TY REMARK 1 14
`
PARTS. NO
DESCRIPTION
STANDARD
C1,C10
TANTAL CAPACITOR
1uF 25V
2
C2
TANTAL CAPACITOR
2.2uF 25V
1
C3,C4
BOX CAPACITOR
102pF 100V
2
BOX CAPACITOR
104pF 100V
5
C6
BOX CAPACITOR
105pF 63V
1
C7
TANTAL CAPACITOR
22uF 25V
1
C11
BOX CAPACITOR
103pF 100V
1
DIODE
1N4004
7
DIODE
1N4148
12
J1,J2
MOLEX CONNECTOR
5273. 5239 14pin
2
PC1,PC2
PHOTO COUPLER
PC817
2
R1,R2
C.F RESISTOR
1Kohm 1/4W
1
R3-R
C.F RESISTOR
4.7Kohm 1/4W
1
R5,R6
C.F RESISTOR
1Mohm 1/4W
1
R7
C.F RESISTOR
3Kohm 1/4W
1
R8
C.F RESISTOR
2.2Kohm 1/4W
1
R9
C.F RESISTOR
200Kohm 1/4W
1
R10
C.F RESISTOR
300Kohm 1/4W
1
R11
C.F RESISTOR
150Kohm 1/4W
1
RL1
RELAY
DS2E-ML2-DC12V
1
RL2
RELAY
DS4E-M-DC12V
1
RL3,RL4
RELAY
DS1E-ML2-DC12V
2
U1
I.C
MC14049
1
U2
I.C
MC14011
1
U3
I.C
MC14013
1
U4
I.C
ULN2004
1
U5
I.C
KIA7045
1
C5,C8,C9, C12,C13
Q'TY REMARK
D1,D2, D10-D12, D17,D18, D3-D9, D13-D16,D19
- 45 -
`
PARTS. NO
DESCRIPTION
STANDARD
U6
I.C
NE555
1
XK3,XK4
Socket Relay
14 pin, Round Type
2
XK1
Socket Relay
16 pin, Round Type
1
XK2
Socket Relay
28 pin, Round Type
1
XU2,XU3
Socket I,C
14 pin, Round Type
2
XU1,XU4
Socket I,C
16 pin, Round Type
2
XPC1,XPC2
Socket pc817
4 pin, Round Type
2
- 46 -
Q'TY REMARK
`
- 47 -
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY REMARK
BZ1
BUZZER
DM-04 DC12V
1
J1
HIF CONNECTOR
HIF 3BA-40PA‐2.54DSA
1
L.E.D
3Phi Green
19
C.F RESISTOR
1.2Kohm 1/4W
19
RELAY
DS1ML DC12V
1
SWITCH
Eao96-323
12
S8
SWITCH
AT1D-2M3
1
-
I.C SOCKET MOLEX CONNECTOR
14Pin 5051,5045 2Pin
1 1
-
P.C.B (1.6T EPOXY)
LD1-LD7, LD8-LD10, LD11-LD14, LD16-LD17, LD19-LD21 R74-R77, R78-R80, R81-R86, R88-R89 R91-R94 RL15 S1-S3,S4-S6 S7,S9-S13
1
- 48 -
`
PARTS. NO
DESCRIPTION
STANDARD
Q'TY
-
RECEIVER
IC-R75
1SET
-
Off Air Beacon Monitor Monitor Amp
1SET
-
Off Air Beacon Monitor Meter Amp
PSI
POWER SUPPLY
AD-55 24VA
1SET
PS2
POWER SUPPLY
VSF30-DDW 30VA
1SET
C1,C2
BOX CAPACITOR
104pF 63V
2
F1
FUSE
1A
1
J1
CONNECTOR
M-R
1
J2
3P AC RECEPTACLE
AC-012
1
LD1
LED
5G
1
M1
METER
HS-310 1mA50mV
1
NF1
NOISE FILTER
250V 6A
1
R1 R2
M.F RESISTOR M.F RESISTOR
2.4Kohm 1W 8ohm 6W
1 1
SP1
SPEAKER
4ohm 6W
1
S1
TOGGLE SWITCH
215N
1
VR6
VARIABLE RESISTOR
RV24YN 10Kohm
1
-
HEAT SINK
SY403
1
1SET
- 52 -
REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
C1,C2,C4, C8,C9
BOX CAPACITOR
224pF 63V
5
C3,C5
BOX CAPACITOR
331pF 63V
2
C6,C11
BOX CAPACITOR
333pF 63V
2
C7
BOX CAPACITOR
102pF 63V
1
C10
ELECT CAPACITOR
220uF 25V
1
C12
ELECT CAPACITOR
470uF 25V
1
C13
BOX CAPACITOR
105pF 63V
1
C14,C15
TANTAL CAPACITOR
10uF 25V
2
CN1
CONNECTOR
5267 4Pin
1
CN2
CONNECTOR
5267 3Pin
1
CN3
CONNECTOR
5267 2Pin
1
R1
M.F RESISTOR
59Kohm 1/4W
1
R2
M.F RESISTOR
4.7Kohm 1/4W
1
R3,R4,R14
M.F RESISTOR
1Kohm 1/4W
3
R5,R6
M.F RESISTOR
300ohm 1/4W
2
R7
M.F RESISTOR
3.9Kohm 1/4W
1
R8
M.F RESISTOR
56Kohm 1/4W
1
R9
M.F RESISTOR
220Kohm 1/4W
1
R10
M.F RESISTOR
5.6Kohm 1/4W
1
R11
M.F RESISTOR
330ohm 1/4W
1
R12
M.F RESISTOR
3.3Kohm 1/4W
1
R13
M.F RESISTOR
100Kohm 1/4W
1
R15
M.F RESISTOR
82Kohm 1/4W
1
R16
M.F RESISTOR
39ohm 1/4W
1
R17
M.F RESISTOR
220ohm 1/4W
1
R18
M.F RESISTOR
2.2ohm 1/4W
1
R19
M.F RESISTOR
47ohm 1/4W
1
R20,R21
M.F RESISTOR
10Kohm 1/4W
2
U1,U2
I.C
4556
2
U3
I.C
TDA2003
1
UC1,UC2
BOX CAPACITOR
104pF 63V
2
UC3
ELECT CAPACITOR
470uF 25V
1
- 54 -
Q'TY
REMARK
`
PARTS. NO
DESCRIPTION
STANDARD
C1,C6,C7, C12,
BOX CAPACITOR
102PF63V
6
C3,C9,
NOT USE
C2,C8
NOT USE
C4,C10
TANTAL CAPACITOR
10uF 25V
2
C5,C11
BOX CAPACITOR
103PF 63V
2
D1,D2
DIODE
1N4148
2
J1
MOLEX CONNECTOR
5273,5237 7PIN
1
J2
MOLEX CONNECTOR
5273,5237 6PIN
1
L1,L2
CHOKE
100uH
2
PC1
PHOTO COUPLER
PC817
1
Q1
TRANSISTOR
C3228Y
1
R1,R9
M.F RESISTOR
4.3Kohm 1/4W
2
M.F RESISTOR
1Kohm 1/4W
5
R3,R11
M.F RESISTOR
68Kohm 1/4W
2
R4,R5,R6, R12,R13,R14
M.F RESISTOR
100Kohm 1/4W
6
R7,R15
M.F RESISTOR
4.7Kohm 1/4W
2
R17
M.F RESISTOR
560ohm 1/2W
1
U1,U4
I.C
OP07
4
VR1,VR2,
VARIABLE RESISTOR
10Kohm
2
VR3,VR4,
NOT USE
_
I.C SOCKET
8PIN
4
R2,R8,R10
Q'TY REMARK
R16,R18
- 56 -