UOC III – (21 G-III Chassis)
SERVICE MANUAL COLOUR TELEVISION
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CONTENTS 1.
safety precautions……………………………………………………… precauti ons………………………………………………………………………………………3 ………………………………3
2.
block diagram and PHILIPS UOC functional difference between the various various IC versions ………………….4 ………………….4
3 4 5 6 7 8
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Replacement of memory IC……………………………………………………………………………18 Service adjustment……………………………………………………………………………………...19 ICs functional description………………………………………………………………………………23 Test point waveform………………………………………………………………………………….…30 All ICs/transistors voltages…………………………………………………………………………….31 Purity / convergence convergen ce adjustment………………………………… adjust ment……………………………………………………………………..33 …………………………………..33
2
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CONTENTS 1.
safety precautions……………………………………………………… precauti ons………………………………………………………………………………………3 ………………………………3
2.
block diagram and PHILIPS UOC functional difference between the various various IC versions ………………….4 ………………….4
3 4 5 6 7 8
．
．
．
．
．
．
Replacement of memory IC……………………………………………………………………………18 Service adjustment……………………………………………………………………………………...19 ICs functional description………………………………………………………………………………23 Test point waveform………………………………………………………………………………….…30 All ICs/transistors voltages…………………………………………………………………………….31 Purity / convergence convergen ce adjustment………………………………… adjust ment……………………………………………………………………..33 …………………………………..33
2
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SAFETY PRECAUTIONS 1.
The design of this this product product contains contains special hardware, hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Servi ce should be performed by qualified personnel only.
2.
Alterations of the design or circuitry circuitry of the products products should not be made. Any design alterations or additions will void the manufacturer’s warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.
3.
Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are identified by shading on the schematics and by ( ！ ) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards
4.
Don’t short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model’s power circuit is partly different in the GND. The difference of the GND is shown by the LIVE: ( ) side GND, ISOLATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don’t short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken.
5.
If any repair repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).
6.
The high voltage applied to the picture tube must must conform conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product.
7.
Do not not check high voltage by drawing drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k Ω 2W resitor to the anode button.
8.
When service service is required, observe the the original lead dress. dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of
overheating should be replaced. Always use the 9. manufacturer’s replacement components. 10. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. 11. The surface of the TV screen is coated with a thin film which can easily be damaged. Be very careful with it when handle the TV. Should the TV screen become soiled, wipe it with a soft dry cloth. Never rub it forcefully. Never use any cleaner or detergent on it. (1)
(2)
3
Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (…Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a periode of one second.) This method of test requires a test equipment not generally found in the service trade. Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a “Leakage Current Tester”, measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.). ●Alternate Check Method Plug the AC line cord directly into the AC outlet ( do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500 Ω 10W resistor paralleled by a 0.15 μ F AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.)
.
2 TV Block diagram CPT
RF SAWF (VIF)
SCAVEM VIF1 VIF2
RGB SCAVEM
IF
SAWF (SIF)
T U N E R ( F S )
Video AMP. (TDA6107JF)
BLKIN
SIF1 SIF2
(TDA6108AJF)
VDRA VDRB V uar H.drive EW.Drive EHT info
UOC-III
RGB
FRAME DEF. (TDA8359) Line Def. +EW
SPEAKER
I2C BUS Audio R Audio L
STB
EEPROM 24C32
MainSu
POWER Vaux
l
A A V V 1 2 / / S S
A D V V 3 D
Audio Amp. TDA7266
H e a d
M o n i t o r O u t
h o n e -
4
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3. UOC-III : The UOCIII series combines the functions of a Video Signal Processor (VSP) together with a FLASH embedded TEXT/Control/Graphics µController (TCG µ-Controller) The UOCIII series consists of the following 3 basic concepts: Stereo versions. These versions contain the TV processor with a stereo audio selector, the TCG m-Controller, the multi-standard stereo or BTSC decoder, the digital sound processing circuit and the digital video processing circuit. Options are the adaptive digital PAL/NTSC comb filter and a teletext decoder with 10 page text memory. AV stereo versions. These versions contain the TV processor with stereo audio selector and the TCG m-Controller. Options are the digital sound processing circuit, the digital video processing circuit, the adaptive digital PAL/NTSC comb filter and a teletext decoder with a 10 page text memory. Mono sound versions. These versions contain the TV processor with a selector for mono audio signals and the TCG m-Controller. Options are the adaptive digital PAL/NTSC comb filter and a teletext decoder with 10 page text memory.
MONO VERSIONS:
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3. UOC-III : The UOCIII series combines the functions of a Video Signal Processor (VSP) together with a FLASH embedded TEXT/Control/Graphics µController (TCG µ-Controller) The UOCIII series consists of the following 3 basic concepts: Stereo versions. These versions contain the TV processor with a stereo audio selector, the TCG m-Controller, the multi-standard stereo or BTSC decoder, the digital sound processing circuit and the digital video processing circuit. Options are the adaptive digital PAL/NTSC comb filter and a teletext decoder with 10 page text memory. AV stereo versions. These versions contain the TV processor with stereo audio selector and the TCG m-Controller. Options are the digital sound processing circuit, the digital video processing circuit, the adaptive digital PAL/NTSC comb filter and a teletext decoder with a 10 page text memory. Mono sound versions. These versions contain the TV processor with a selector for mono audio signals and the TCG m-Controller. Options are the adaptive digital PAL/NTSC comb filter and a teletext decoder with 10 page text memory.
MONO VERSIONS:
5
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AV STEREO VERSIONS
.
AV STEREO VERSIONS
6
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Block diagram of STEREO sound processor.
.
Block diagram of STEREO sound processor.
7
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.
8
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.
9
.
.
10
.
.
11
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PINNING DETAILS
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PINNING DETAILS
12
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.
13
.
.
14
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15
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16
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17
3.REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from AC outlet. (2) Replace IC Be sure to use memory IC written with the initial data values. (3) Power On Plug the power cord into the AC outlet and switch the power On. (4) Check and set SYSTEM default value:
3.REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from AC outlet. (2) Replace IC Be sure to use memory IC written with the initial data values. (3) Power On Plug the power cord into the AC outlet and switch the power On. (4) Check and set SYSTEM default value: 1) Press “MENU” key and then press number “6 4 8 3” key on the Remote control unit. 2) The “Service pages ” will be displayed on the screen. 3) Press digital key, (Mkey) and corresponding on-screen display will be appear. 4) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by [VOL+]/[VOL-] keys. 5) Press “STANDBY” key again and return to the normal screen.
18
4.SERVICE ADJUSTMENT
FOCUS ADJUSTMENT 1. Receive a crosshatch signal. 2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible.
DESIGN & SERVICE DATA Micon Flash
TDA 12020H/N1F00 ,29GIII EXPO
Memory Tuner
EEPROM, 24C32. GDC EWT5F3T43-E27W ( FS TUNER)
Software Date
GIIIA V EXPORT 26 JULY 06
Rev No Date Chassis
3 VE05 GIII
DESIGN DATA ( PRESS " MENU + 6483 " KEY ) & Press " Demo / Call " key to QUIT. S.N.
PARAMETER
0
UOC 3 AV Stereo
1
Init TV
2
Shipping
3
ISP Mode
4
VSD Brightness
5
VSD LINE
6
VG2
7
DCXO
8
DCXO Auto
9
Tube-Type
10
Track.Mode
11
Vert. Slope
12
Vert. Shift
13
Vert. Ampl
14
S-Corr.
15
Vert. Slope 60
16
Vert. shift 60
17
Vert. Ampl. 60
18
S-Corr. 60
19
Ver. Lin. 60
VALUE
4.01 0 0 0 34 0 32 79 0 1 0 34 36 52 32 (Adjust) 34 36 52 32 32 (Adjust)
116
Soft Clip Level
117
PSNS
118
Mute Pin
119
SUB BASS
120
SUB TRB
121
Vol 1
122
Vol 2
123
Vol 3
124
Vol 4
125
SWL
126
Vol. Gain
127
Vol. Gain 2
128
AGN
129
DSG
130
FMWS
131
100Hz
132
300Hz
133
1KHz
134
3KHz
135
10KHz
19
0 2 0 40 35 33 55 58 60 40 63 29 1 0 2 40 40 40 40 40
20
Expand Option
21
Compress OPTION
22
V. Lin. Ctrl.
23
V. Linearity
24
Rotation
25
EW Width-4
26
Hor. Shift-4
27
EW Parabola-4
28
Traepezium-4
29
UC Parabola-4
30 31
LC Parabola-4 Hor. Bow-4
32
Parallel-4
33
Hor. Shift 60-4
34
Vert. Scroll
35
VX Normal
36
VX Expand
37
VX Expand-60
38
VX Compr.
39
VS Subt.
40
HBL
41
WBF
42
WBR
43
WSS
44
Gld-SCART
45
R-CUT-N
46
G-CUT-N
47
RDrive-N
48
GDrive-N
49
BDrive-N
50
COOL OFFSET
51
WARM OFFSET
52
RGB
53
PV-BR-MV
54
PV-CL-MV
55
PV-CT-MV
56
PV-SH-MV
57
PV-BR-SP
58
PV-CL-SP
59
PV-CT-SP
60
PV-SH-SP
61
PV-BR-ST
62
PV-CL-ST
63
PV-CT-ST
64
PV-SH-ST
1 0 0 32 (Adjust) 0 58 ( ADJUST) 46 ( ADJUST) 40 ( ADJUST) 38 ( ADJUST ) 56 (ADJUST ) 38 ( ADJUST ) 32 ( ADJUST ) 24 ( ADJUST ) 44 ( ADJUST ) 32 (Adjust) 10 20 ( ADJUST) 20 ( ADJUST) 10 16 0 5 8 1* 1* 32(Adjust) 32(Adjust) 32(Adjust) 32(Adjust) 32(Adjust) 20 20 15 32 32 32 32 32 32 48 32 48 32 48 32
136
OP AUDIO CONFIG
137 138
OP WOOFER WOOFER FREQ.
139
OP EQUAL
140
OP DOLBY
141
OP TRUSUR
142
OP DUB
143
AVL-LEV
144
AVL-WGT
145
AVL-MOD
146
AVLE
147
LOUD-NA
148
LOUD-CH
149
BBE-CONT
150
BBE-PROC
151
OP CLIP
152
DEC-LEV
153
MONO-LEV
154
NIC-LEV
155
ADC-AM-L
156
ADC-AV-L
157
BGSCAL DEC
158
BGSCAL MONO
159
BGSCAL NIC
160
BGSCAL SAP
161
MSCAL DEC
162
MSCAL MONO
163
MSCAL NIC
164
MSCAL SAP
165
LSCAL DEC
166
LSCAL MONO
167
LSCAL NIC
168
LSCAL SAP
169
E2D
170
PA-BA-VO
171
PA-TR-VO
172
PA-LM-VO
173
PA-ST-VO
174
PA-LO-VO
175
PA-B1-VO
176
PA-B2-VO
177
PA-B3-VO
178
PA-B4-VO
179
PA-B5-VO
180
PA-BA-MU
20
2 0 4 1 0 0 0 8 0 3 0 3 1 7 7 3 15 15 10 15 15 1 1 1 1 1 1 1 1 1 1 1 1 0 30 55 1 5 0 15 50 50 30 15 30
65
PV-BR-GA
66
PV-CL-GA
67
PV-CT-GA
68
PV-SH-GA
69
Y SECAM
70
Y NTSC
71
Y PAL
72
YAV1
73
YAV2
74
YSVHS1
75
YSVHS2
76
ACL
77
MUS
78
PWL
79
CB
80 81
BPS FCO
82
SVMA
83
SVMD
84
SVMG
85
SMD
86
SVM-OSD-PW
87
SMD-OSD-TM
88
PeakFreqPAL443
89
PeakFreqPALM
90
PeakFreqPALN
91
PeakFreqNTSC443
92
PeakFreqNTSCM
93
PeakFreq SECAM
94
Peak Freq AV
95
CRAO
96
VIDEO CORING
97
CROMA TRAP
98
GAMMA
99
VA
100
VAI
101
Blackstrech
102
Bluestrech
103
SVM OPTION
104
Whitestrech
105
PeakRatio0vShot
106
Tint NTSC
32 32 16 32 10 10 10 10 10 10 ( N.A.) 10 ( N.A.) 0 0 8 0 0 0 0 7 3 3 3 2 2 2 2 2 2 2 2 0 0 0 0 1 1 1 1 0 1 2 40
181
PA-TR-MU
182
PA-LM-MU
183
PA-ST-MU
184
PA-LO-MU
185
PA-B1-MU
186
PA-B2-MU
187
PA-B3-MU
188
PA-B4-MU
189
PA-B5-MU
190
PA-BA-TH
191
PA-TR-TH
192
PA-LM-TH
193
PA-ST-TH
194
PA-LO-TH
195
PA-B1-TH
196
PA-B2-TH
197
PA-B3-TH
198
PA-B4-TH
199
PA-B5-TH
200
AGC Speed
201
AGC
202
OIF
203
IF
204
Tuner-0 G 1-T 2-P
205
SVO
206
GD
207
BPB
208
DVD1-IN
209
AV2-IN
210
CVBS-OUT
211
INCL-AV
212
SECAM
213
L
214
TXT-ON
215
TXT-SPILT
216
TXT-HPOSITION
217
TXT-CONT
218
PWR-SAVING
219
PWR-PERF
220
PWR-REST
221
PWR-ON KEY
222
BUS Stop
M-Mode 107
SUB BRI
40 (Adjust)
223 21
40 1 5 0 63 45 20 45 63 55 63 1 5 0 40 45 50 45 40 1 20 32 2 0 0 1 0 0 1 1 1 1 0 1 1 10 15 1 3 1 1 0 0 (1 For Mmode)
108
SUB CON
109
SUB COL
110
SUB SHAR
RC- OPT 111 112
OSO
113
FFI
114
FSL
115
HP2
63 60 40 64 ( VIDEOCON )
224
Comb Filter
225
BlUe Back Col
226
Game
227
Loudness
0 0 0 0
228
Calender - OPT
229
Lock-opt
230
EVG
231
DFL
232
XDT
233
AKB
234
OSVE
235
CL
22
0 1 0 1 0 1 1 1 1 0 0 8
5. ICs functional description. Power supply: FSCQ0765RT Description The FSCQ0765RT is an integrated Pulse Width Modulation (PWM) controller and Sense FET specifically designed for Quasi-resonant off-line Switch Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature compensated precise current sources for a loop compensation and self protection circuitry
23
24
25
Audio amplifier: DESCRIPTION The TDA7266 is dual bridge amplifier assembled in the Multiwatt package, specially designed for TV & Portable Radio applications.
26
27
Vertical Amplifier: The TDA8359J is an integrated power circuit for use in 90°and 110°colour deflection systems. It contains a vertical deflection bridge output, operating as a high efficiency class G system and can handle field frequencies from 25 to 200 Hz. The vertical coil of a 4 : 3 as well a 16 : 9 picture tube can be connected to this vertical deflection device. Due to the bridge configuration a DC deflection output application can be designed with a positive main supply of typical 12 Volts and a positive flyback supply of typical 45 Volt
Pinning:
28
Pin No. 6: Control keys input ( Limit voltages) Function
TV/AV
MENU
V-
V+
P-
P+
Voltage
0.45-0.55V
1.9-2.1V
1.4-1.7V
1.1-1.3V
0.75-0.85V
0.15-0.35V
29
6. Test point Waveforms – 1.5Vpp- R
2.0Vpp
H 80Vpp GIII PIN 43
80Vpp
H CRT KR
H
H
H CRT KG
1.5Vpp - G
H
GIII 80Vpp PIN 85
GIII0.7Vpp PIN 86 - Hor.
VDRB-0.8Vpp
GIII PIN23 CRT-PCB- 22Vpp
H HEATER– R713
GIII PIN24
GIII PIN 4.887Vpp
H
CRT KB
GIII PIN-66
1000VPP
2.0 Vpp
V
V
H
H
H
GIII PIN-67 VDRA- 0.8 Vpp
1.5Vpp - B
H GIII PIN36
H-OUT C
140 Vpp
H CRT SUPPLY
30
7. IC voltages AC supply :
176~260V 50/60Hz
GIII IC PIN V PIN V PIN V PIN V PIN V PIN V PIN V PIN V
1
2
3
4
5
6
7
8
9
10
11
12
13
0
0
1.74
3.09
3.09
0
3.09
0
3.09
1.41
1.41
0
0.14
17
18
19
20
21
22
23
24
25
26
27
28
29
2.3
0
2.29
2.30
3.30
0.71
0.66
1.91
1.91
2.31
1.93
0
33
34
35
36
37
38
39
40
41
42
43
0.18
NC
NC
2.09
2.09
2.29
2.44
0
1.99
1.80
49
50
51
52
53
54
55
56
57
2.18
2.18
1.39
NC
NC
NC
NC
2.18
65
66
67
68
69
70
71
NC
0.26
0.40
0
4.94
NC
81
82
83
84
85
0
4.91
3.32
3.8
97
98
99
4.82
NC
113 NC
15
16
4.92
1.6
30
31
32
1.90
1.90
4.14
1.9
44
45
46
47
48
4.87
NC
4.96
2.26
4.87
1.5
58
59
60
61
62
63
64
2.18
1.39
1.55
2.20
2.20
NC
NC
NC
72
73
74
75
76
77
78
79
80
NC
NC
2.08
1.78
NC
NC
3.38
1.24
1.24
1.2
86
87
88
89
90
91
92
93
94
95
96
2.94
2.95
2.81
3.07
0
3.11
1.54
0
1.66
3.11
0
1.6
100
101
102
103
104
105
106
107
108
109
110
111
11
NC
1.76
0
0.03
NC
NC
NC
3.76
0
3.20
3.20
2.10
NC
NC
114
115
116
117
118
119
120
121
122
123
124
125
126
127
12
0
NC
NC
1.76
1.77
NC
3.12
0
0
NC
1.72
1.72
NC
NC
NC
Vertical Amplifier IC TDA-8359 2 3 4 5 6 PIN 1 0 44.6 V 0.97 0 14.96 7.50
7
8
9
7.8
0
7.4
31
14 2.46
8. PURITY / CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT 1.
Demagnetize CRT with the demagnetizer.
2.
Loosen the retainer screw of the deflection yoke.
3.
Remove the wedges.
4.
Input a green raster signal from the signal generator, and turn the screen to green raster.
5.
Move the deflection yoke backward.
6.
Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig2)
7.
Adjust the gap between two lugs so that the GREEN RASTER will come into the center of the screen. (Fig. 3)
8.
Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green.
9.
Insert the wedge to the top side of the deflection yoke so that it will not move.
WEDGE DEFLECTION YOKE
P
CRT 4 6
P/C MAGNETS P: PURITY MAGNET 4: 4-POLES (convergence magnets) 6: 6-POLES (convergence magnets)
Fig. 1
PURITY MAGNETS Long lug
10. Imput a crosshatch signal. 11. Verify that the screen is horizontal. 12. Input red and blue raster signals, and make sure that
Short lug
purity is properly adjusted.
Bring the long lug over the short lug and position them horizontally.
Fig. 2
(FRONT VIEW) GREEN RASTER
CENTER
Fig. 3 32
