SERVICE SERV ICE MANUA MANUAL L
JD-TV9021 ( 3Y03 CHASSIS )
Contents Safety Notice Notice....................... ................................................ ........................................ ...............2 Technical specification ..................................................3 Chassis Block Diagram..................................................4 IC Block Diagram .......................................................5-7 Transistor mark ...........................................................8 Chassis wiring diagram ................................................9 P C B To p l a y e r............................................................1 0 - 1 1 Service Adjustments ................................................ 12-18 Purity and Convergence Adjustment ....... ........ ........ .....19 Contro l Locat ion ...........................................................20 I n p u t a n d O u t p u t Te r m i n a l s ...........................................2 1 Operation Operati on Instructi Instructions.......... ons................................... ....................................... ..............22-23 M e c h a n i c a l D i s a s s e m b l i e s .............................................2 4 C a b i n e t p a r t s L i s t ...........................................................2 5 Circuitt Diagra Circui Diagram.................. m.......................................... ............................................2 ....................26 6
Safety Notice SAFETY PRECAUTION PRECAUTIONS S 1:An isolation transfor mer should be connecte connecte d in the power power line between between the receiver and the AC line when a service is performed on the primary of the converter transforme r of the set. 2:Compl y with all caution and safety-relat ed notes provided provided on the cabinet cabinet back, inside the cabinet , on the the chassis or the the picture picture tube. 3:When replacing a chassis chassis in the the cabinet, always be certain certain that all the protecti protecti ve devices
Chassis Block Diagram L R E K A E P S
R R E K A E P S
3 5 0 8 4 2 4 C a I L
N I O E D I V
N I 2 V O I A / D 1 U V A A
2 V A / 1 V A
T R C
T U O O E D I V
S C U O F
N E E R C S
P B 3 0 5 0 O 4 4 c F I E H
P M A B G R
P B 1 2 0 5 4 O c 4 I F E H
N I O
N 0 L O 4 I 8 A T 7 C I C a T E L R L 1 E F 0 V E 3 c D I
T U O V
0 4
L N A T O I N T O C Z I E F R E O D H
T U O H
P B F
V 4 2
1 2 9 1 P
V 2 1 / V 9
IC Block Diagram VIF,SIF ,SIF,VIDEO ,VIDEO IC 201 (IIC BUS SINGLE CHI P VIF
CHROMA) LA76814K R T O U H O
7.5K 10K
P B N F I
330p F E R
8 2
R O O C H V
9 2
4.7K
2 C F A
P B F 6 5 2 / 1
R D / O H C
Meta MetalF lF il m(1%) m(1%) 0 3
R E S E T A F H I H P S
u 1
K 0 1
1000p
R P E E V S
u 7 24K 4 . 0
0.01u 16p
10u O V
R D E / V C
P R M E V A R
Y A R X
6 3 7 3 8 3 9 3 0 4
1 C P A
O C V
R P O M L A O L C C
T S T A R H T G I N R B O C
)
3 2
X I B R T G R A M
D S W S O
F F O T U C / E V I R D
) F F F P O / B N O (
O M E D
H K C C T A E L R B T S
T S T A D R H S T G I O N R B O C
c c V
T R U E V O
5.6k T B U O
0 2
T G U O
9 1
T R U O
0.01u 10u
7 1 6 1 P M A
0.33u(
1 2
8 1
T N I T
) V 9 R ( O C H C V
150
4 20.33u(
2
R E C L C A L I K
150 0.015u
56p 2 100
5 3
24K
1u
R c 5 O c 2 10u H V
3 3 4 3
3K 0.01u
1 3 2 3
7 2 6 2
1 C F A
1K 1K
R D O N H G
R T U O H O
5 1
)
c t n u y S O
) V C 2 C 1 V 9 ( B N F I
0.1u(
) B I N
0.1u(
) G I N
M A R G A I D K C O L B K 4 1 8
IC Block Diagram IC301
LA7840
PUMP UP THERMAL PROTECTION
-
AMP
+
1
D N G
2
T U P T U O . r e V
3 c c V E G A T S T U P T U O
IC 403(3W AUDIO OUTPUT) LA 4285
4
T U P N I . V N I N O N
5
T U P N I O N I T R E V N I
6 c c V
7
T U O P U P M U P
IC Block Diagram IC602 STR-G6653 4
VIN
1 D START
O.V.P
LATCH
DRIVE
2 REG.
T.S.D
+ Vth(1) O.S.C
Comp1
S 5 O.C .P/F.B
+ Vth(2) Comp2
3 GN D
IC603
TRANSISTOR> TLP621
Tran sisto r Mark
NPN
PNP
PNP
C 2 4 8 2
A 9 6 6
C 2 1 2 0
E
E
C
B
E
C
B
C
C 1 8 1 5
A 1 0 1 5
B
E C
NPN
NPN
PNP
B
E C
C 2 7 1 7
B
B
E
C
Chassis wiring diagram CN 601 AC IN CN 301 TO CRT BOARD
CN 301B FROM FR OM CN 301
SCREEN
CN 302
CN401 TO SPEAK ER
FOCUS
CN 201B
MAIN MAI N PCB PC B Top La Layer yer
CRT,, FRON CRT FR ONT T AV&C V&CON ONTR TROL OL PCB Top Top Lay L ayer er FRO NT AV AV & CONT ROL PCB TOP LAYER
Service Adjustments Please notice the following before alignment and equipment 1. Don’t short any two soldering points, points, which should not be shorted and don’t don’t touch any components, components, which should not be touched. 2. Please pull out plug before equipment. 3. For safety reasons, all components components equipped or replaced should be identical with with BOM. 4. Must be warm up for 30 minutes or more and degauss CRT thoroughly with demagnetizer demagnetizer before alignment. The data of EEPROM must be stored before the adjustment adjustment for main chassis. And EEPROM must be corrected by the correct file “3Y03_ROM_CORRECT.hex “ 3Y03_ROM_CORRECT.hex ” to avoid signal of CH6 weaken. R.bias, G.bias, B.bias, R.drv, R.drv, G.drv, B.drv B.drv should be set to proper values. Sub_bright is set to 63 usually. usually.
Tools and equipments for adjustment 1. 2. 3. 4. 5. 6. 7.
small “-“ screwdriver screwdriver without inductance Pattern Generator DC Regulated power supply Digital Voltmeter Sweep Signal Generator 20MHz 2-channel Oscilloscope
Service Adjustments B+ adjustment a. b. c. d.
Disconnect horizontal load. Connect a bulb (100 W) AC 250V across C321. Add 220V AC 50HZ to CN601 and switch on power switch. Test the voltage with digital digital voltage voltage meter meter between between C321 C321 two terminals. Adjust VR601 to obtain +110V¡À0.5V.
AGC alignment a. b.
c.
Receive 60dB RF signal. Connect Digital voltmeter positive terminal to tuner tuner AGC terminal and negative terminal to GND. Press “MENU” key, then press press “Q.VIEW” key, “MUTE” key in turn on telecontroller. telecontroller. TV SET will will go to factory factory mode. Press “TIMER” key to go to the next factory menu. Go to MENU5 status by this means. Press “MENU” key to exit factory mode. Select RF.AGC RF.AGC by pressing pressing “CH+” “CH+” and “CH-“keys. Adjust “VOL+” “VOL+” and “VOL-“ keys to obtain obtain 4V Digital Digital voltage voltage meter reading.
COMPLETE MACHINE GENERAL ADJUSTMENT Go to factory mode according to 4-2-2 before warm up line Focus Adjustment a. Receive monoscope pattern. b. Set TV to work in dynamic status. c. Adjust the focus focus knob knob of of FBT to get get the clearest picture.
Ver tical s ize and p incushion adjustment
Service Adjustments White balance adjustment (Applied when servicing) a. Set TV AV status and receive GREY SCAL. b. The one sampling tube of CRT color analyzer (CA-100) covers on GREY signal and the another covers on white signal. c. Go to factory mode “MENU2”. Obtain GREY signal X=281 and y=311 by adjusting R-CUT R-CUT and B-cut. Obtain white signal X=281 and y=311 by adjusting R-DRV and B-DRV. Obtain both X=281 and Y=311 by adjusting the two status repeatedly.
Sub_bright
adjustment
Receive the gray scale . Get into the menu5 of of factory mode. mode. Set SUBB.ADJ to “1”. Then option to get a scale to be seen a little brightness(Only two rows can be seen).
adjust the SUB..BRI
Verticall Size and PinCushion Adjus Vertica Adjustment tment a.
Receive monoscope pattern. Set TV standard status. Adjust V.size to obtain picture’s picture’s vertical redisplay ratio more than 90% in factory mode “MENU1”. b. Receive cross hatch pattern. Set TV standard status. Adjust V.LINE V.LINE and V.SC to obtain picture’s picture’s vertical pin cushion a good status in factory mode “MENU1”. c. Receive cross hatch pattern. Set TV standard status. In factory mode “MENU1” adjust adjust V.POS to obtain picture’s vertical center at the center of CRT screen.
Horizontal Center Adjustment
and horizontal position of OSD adjustme adjustment nt
Ver tical s ize and p incushion adjustment
Service Adjustments COLOR PURITY ADJUSTMENT a. b. c.
Before color purity adjustment, Warm up the TV set over 15 minutes and fully degauss. Receive pure white signal in AV status and set the TV receiver dynamic. Go to factory mode mode “MENU2”. “MENU2”. After write down down the values of R-BIAS and B-BIAS, B-BIAS, set the values values of R-BIAS and and B-BIAS zero.
d.
Loosen the clamp clamp screw of the deflection yoke and and pull pull the deflection yoke towards towards color color purity purity magnetic magnetic loop. loop.
e.
Adjust color purity magnetic loop to make make the green area at the center of CRT CRT screen. screen.
f.
Slowly push the deflection deflection yoke toward the front front of CRT and and set set it where a uniform uniform green field is obtained. obtained. Tighten the clamp screw of the deflection yoke.
g.
Restore the values of R-BIAS, G-BIAS and B-BIAS.
CONVERGENCE ADJUSTMENT a.
Receive a dotted dotted pattern. pattern. Set Set the TV receiver receiver dynamic.
b.
Loose the convergence convergence magnet clamper clamper and align red with blue dots at the center of the the screen by by rotating (R, (R, B) static convergence magnets.
c.
Align Red/Blue Red/Blue with green dots at the center center of the screen screen by rotating rotating (RB-G) static static convergence convergence magnet. magnet.
Ver tical s ize and p incushion adjustment
Service Adjustments APPENDIX FACTORY MENU DISCRIPTION
1 2 3 4 5 6 7
MENU1
VALUE
DISCRIPTION
V.SIZE V.POS V.LINE V.S C H.PHASE H.BLK.RL H.FREQ
101 32 16 0 8 4 22
Align vertical amplitude Align vertical DC bias Align vertical linearity Align vertical S-correction Align sync to flyback phase H-blanking Control(Width /Phase) Align ES Sample horizontal frequency
MENU2 1 2 3 4
V.KILL R.B G.B B.B
0 138 182 148
Disable vertical output Align Red out DC level Align Green out DC level Align Blue out DC level
5
R.D
67
Align Red out AC level
6
G.D
8
Align Green out AC level
Ver tical s ize and p incushion adjustment
Service Adjustments OPTION
1 2 AV AV.CH .CH 2 SRH.SPEED 3 TDA9852 4 TUN.AS.V 9852 AUTO.ADJ
3 0 1 1
Select AV numbers(0/ number s(0/ No AV;1/1 AV AV;; 2,3/2AV) Select auto search speed(0/fastest, 7/lowest) Disable 9852(0/disable; 1/able) Select the Tuner address(0/Tuner address(0/Tuner pin3 to ground;1/pin3 not used)
1 2 3 4 5 6 7 8
ADJ.FREQ ADJUSTING FM.LVL 76075.VOL L3-L0 TC2-TC0 A14-A10 A24-A20 TDA1
0 0 16 0 0 0 0 0
Disable auto adjusting(0/disable; adjusting(0/disable; 1/get into autoadjust mode)
1 2 3
VOL.RIGHT VOL.LEFT GMU
125 125 0
volume control right volume control left mute control for all outputs (general mute ) auto volume control (with 0.1Vrms-1.1Vrms 0.1Vrms-1.1Vrms input to get constant output
input level adjust timing current alignment data stereo alignment data for wideband expander stereo alignment data for spectral expander
Ver tical s ize and p incushion adjustment
Service Adjustments TDA3 1 2 3 4 5 6 7 8
ADJ AT1 AT1 -AT -AT22 TC2-TC0 WR.ERR RD ERR MANU ADJ STEREO SAP
0 0 0 0 0 0 0 0
stereo adjust on/off attack time at AVL timing current alignment data
mode selection for line out mode selection for line out
White Balance address
White Balance address Data Name
E2PROM Address
bright contrast color
12H 11H 10H
LA76814 ADDRESS #1011 1010B #0001 0100B #0001 0101B #1011 1010B
Purity and Converge nce Adjustment COLOR PU RITY ADJUSTMENT (1) Before color purity adjustment,war m up the TV set over 15 minutes and fully degauss. (2) Receive pure white signal in AV AV status and set the TV receiver dynamic. (3) Go to factory mod MENU2. After write down the values of R-BIAS and B-BIAS, set the values of RBIAS and B-BIAS z ero. (4) Loosen the clamp screw of the deflection yoke and pull the deflect ion yoke towards color purity Magnetic loop. (5) Adjust col or purity magn etic loop to make the green area at the center of CRT screen. (6) Slowly push the deflect ion yoke toward the front of CRT and set it where a uniform green field is Obtained. Tighten th e clamp sc rew of the deflecti on yoke. (7) Restore the values of R-BIAS, G-BIAS AND B-BIAS.
CONVERGENCE ADJUSTMENT (1) Receive a dotted pattern. Set the TV receiver dynami c. (2) Loose the convergen ce magnet clamper rrrr and align red with blu dots at the center of the screen by rotating(R,B) static convergence magnets. (3) Align Red/Blue with green dots at the center of the screen by rotatin g(RB-G) stat ic convergen ce magnet. (4) Remove the DY wedges and slightl y tilt the deflecti on yoke horizont ally and vertica lly to obtain the good
Control Location 1. Remote Sensor 2. Power Indicator 3. Main Switch 4. Speakers 5. Program Down Down & Up Button 6. Volume Down & Up Button 7. Menu Button 8. AV/TV Button 9. Front AV In (Option) 10. Audio/Video - In/Out Jack 11. AC Power Power Cord 12. Terminal Antenna (75 Ohm)
(STEREO)
4
9
5
6
7
8
2
1
3
4
Inputt and Output Termi Inpu Terminals nals VIDEO AND AUDIO INPUT/OUTPUT I NPUT/OUTPUT TERMINALS 1. Video / Audio input for playback for VCR. 2. Video / Audio output for TV monitor output. *Please keep AC cord unplugged when connecting TV system. (STEREO) AV-OUT
AV-IN
L
VIDEO
L
AUDIO
VIDEO
AUDIO R
R
(MONO) OUT VIDEO
IN AUDIO
VIDEO
AUDIO
Operation Instructions Turn the TV set set on, then power power indicator will light light up. After a few seconds seconds , the currently currently program number is displayed on the top right -hand corner of the screen.
MENU BUTTON 1.Press this button to select menu. VIDEO, TIME, and SETUP menu can be selected cyclically.
Video Menu
Audio Menu (Option)
Time Menu
Setup Menu
Exit Menu
2.After enters each menu, you can select the desired adjusting item by the PROG.+/- buttons, and adjust the item by the VOL. +/- buttons. *When you select a item, symbols¡°
/
¡±will display both sides of the item.
Video menu Video Audio Time
Custom Contrast Bright
16 16 Sharpness 16 16 Color -15 Tint
1.Enter the video menu , you can select the picture quality instantly among four preset modes and one user-set mode. (User-set mode) Custom Standard Sports Movies Mild
Setup
*You can adjust CONTRAST CONTRAS T ,BRIGHT , SHARPNESS SHARP NESS , COLOR and TINT items by pressing the VOL. +/- buttons . The adjusted level is stored s tored in Custom mode.
Audio menu(option)
Operation Instructions Setup menu 1.After enters the setup menu, you press the PROG+/-buttons to select PRESET MENU, CCD MENU and V-CHIP MENU.
Video Audio Time Setup
2.Select the Language item by the PROG+/-buttons, and press the VOL.+/buttons to select the desired language . The screen menu is automatically displayed in that language. The order shown below: English Espanol Portugues
Preset Captain V-Chip Language
PRESET MENU , CCD MENU MEN U AND V-CHIP MENU PRESET MENU Preset System
Antenna
Channel
03
Skip
Off
Auto Search Fine Tune
1.SYSTEM you can switch two signals :CABLE and ANTENNA . 2. CHANNEL Select the cable signal ,there are 01~125 channels Select the antenna signal , there are 02~69 channels . 3.SKIP Select "Skip ON" by VOL.+/- Buttons to skip unnecessary program number. 4.AUTO SEARCH Press VOL.+/-buttons to start auto searching. 5.FINE TUNE In areas of inferior broadcast conditions conditions where adjustment is necessary for
Mechanical Disassemblies CABINET BA CK REMOVAL
CHASSIS REMOV REMOVAL AL
1. Refe r to Figur e 1,remove 9 screws . 2. Pul l off cabinet back and remove.
1. Remove cabinet back. 2. Discha rge the pict ure tube ano de(2nd anode lead) to the dag coating (picture tube grounding lead). 3. Disconnect Degaussing coil socket(KE),Picture tube socket, Deflection yoke connector (KDY), Speaker connectors(KL and KR) , and 2nd anode lead . 4. Remov e chassis c omplet ely by slidi ng it strai ght back.
PICTURE PICT URE TUBE TU BE REMO REMOV VAL CAUTION: Do not disturb t he deflect ion yoke or magnet assembly on the picture tube Neck. Care mus t be tak en to keep these assembli es intact , unless picture tube is being repla ced. Discharge t he picture t ube to the coating befo re handing the Tube. 1. Remove chassis, r eferri ng to Chassis Removal instructio ns. 2. Place cabinet fr ont face down on the soft surf ace. 3. Remov e the sc rew on each corner of the picture tube and GENTLY lift the picture tube out of the cabinet . 4. Inst all a replacement picture tube in reverse order. Properly install the degaussing coil and picture tube grounding lead on the picture tube. See Figure 2.
Cabinet Parts List
1
6
2
7
4
3
5
1
10
8
9 11
12