UOC III – (21 G-III Chassis)

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CONTENTS 1. safety precautions……… ………………………………………………………………………………3 2. block diagram

and PHILIPS UOC functional difference between the v arious IC versions ………………….4

3．．．． Replacement of memory IC…………………………………………………………………… ………18 4．．．． Service adjustment…………………………………………………………………………………… ...19 5．．．． ICs functional description……………………………………………………………… ………………23 6．．．． Test point waveform……………………………………………………………………………… ….…30 7．．．． All ICs/transistors voltages………………………………………………………… ………………….31 8．．．． Purity / convergence adjustment……………………………………………… ……………………..33

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SAFETY PRECAUTIONS 1. The design of this product contains special 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. Service should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the 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 schematic s 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 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 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 check high voltage by 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 10kΩ 2W resitor to the anode button.

8. When service is required, observe the original lead 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) 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.

(2) 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 1500Ω 10W resistor paralleled by a 0.15μF 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.)

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2 TV Block diagram

SAWF

(VIF)

SAWF

(SIF)

TUNER(FS)

UOC-III

RF CPT

Video AMP.

(TDA6107JF)

(TDA6108AJF)

RGB IF

SIF2

SIF1

VIF1

VIF2 RGB

SCAVEM

BLKIN

SCAVEM

EEPROM

24C32

I2C BUS

FRAME DEF.

(TDA8359)

VDRA

VDRB

Vguar

Line Def.

+EW

H.drive

EW.Drive EHT info

Audio Amp.

TDA7266

Audio R

Audio L

POWER

STB

SPEAKER

R

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25

29

30 84

65

85/86/8

22

23

13

67

21

32

61

60 107

108/109

MainSuppl

Vaux

AV1/S

AV2/S

AV3

DVD

Monito

r-Out

Headphone-

70/71/7

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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 µ-Controller (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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AV STEREO VERSIONS

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Block diagram of STEREO sound processor.

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9

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10

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PINNING DETAILS

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15

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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.

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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 EEPROM, 24C32.

Tuner GDC EWT5F3T43-E27W ( FS TUNER)

Software Date GIIIA V EXPORT 26 JULY 06

Rev No 3 Date Chassis VE05 GIII

DESIGN DATA ( PRESS " MENU + 6483 " KEY ) & Pr ess " Demo / Call " key to QUIT.

S.N. PARAMETER VALUE

0 UOC 3 AV Stereo 4.01 116 Soft Clip Level 0 1 Init TV 0 117 PSNS 2 2 Shipping 0 118 Mute Pin 0 3 ISP Mode 0 119 SUB BASS 40 4 VSD Brightness 34 120 SUB TRB 35 5 VSD LINE 0 121 Vol 1 33 6 VG2 32 122 Vol 2 55 7 DCXO 79 123 Vol 3 58 8 DCXO Auto 0 124 Vol 4 60 9 Tube-Type 1 125 SWL 40

10 Track.Mode 0 126 Vol. Gain 63 11 Vert. Slope 34 127 Vol. Gain 2 29 12 Vert. Shift 36 128 AGN 1 13 Vert. Ampl 52 129 DSG 0 14 S-Corr. 32 (Adjust) 130 FMWS 2 15 Vert. Slope 60 34 131 100Hz 40 16 Vert. shift 60 36 132 300Hz 40 17 Vert. Ampl. 60 52 133 1KHz 40 18 S-Corr. 60 32 134 3KHz 40 19 Ver. Lin. 60 32 (Adjust) 135 10KHz 40

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20 Expand Option 1 136 OP AUDIO CONFIG 2 21 Compress OPTION 0 137 OP WOOFER 0 22 V. Lin. Ctrl. 0 138 WOOFER FREQ. 4 23 V. Linearity 32 (Adjust) 139 OP EQUAL 1 24 Rotation 0 140 OP DOLBY 0 25 EW Width-4 58 ( ADJUST) 141 OP TRUSUR 0 26 Hor. Shift-4 46 ( ADJUST) 142 OP DUB 0 27 EW Parabola-4 40 ( ADJUST) 143 AVL-LEV 8 28 Traepezium-4 38 ( ADJUST ) 144 AVL-WGT 0 29 UC Parabola-4 56 (ADJUST ) 145 AVL-MOD 3 30 LC Parabola-4 38 ( ADJUST ) 146 AVLE 0 31 Hor. Bow-4 32 ( ADJUST ) 147 LOUD-NA 3 32 Parallel-4 24 ( ADJUST ) 148 LOUD-CH 1 33 Hor. Shift 60-4 44 ( ADJUST ) 149 BBE-CONT 7 34 Vert. Scroll 32 (Adjust) 150 BBE-PROC 7 35 VX Normal 10 151 OP CLIP 3 36 VX Expand 20 ( ADJUST) 152 DEC-LEV 15 37 VX Expand-60 20 ( ADJUST) 153 MONO-LEV 15 38 VX Compr. 10 154 NIC-LEV 10 39 VS Subt. 16 155 ADC-AM-L 15 40 HBL 0 156 ADC-AV-L 15 41 WBF 5 157 BGSCAL DEC 1 42 WBR 8 158 BGSCAL MONO 1 43 WSS 1* 159 BGSCAL NIC 1 44 Gld-SCART 1* 160 BGSCAL SAP 1 45 R-CUT-N 32(Adjust) 161 MSCAL DEC 1 46 G-CUT-N 32(Adjust) 162 MSCAL MONO 1 47 RDrive-N 32(Adjust) 163 MSCAL NIC 1 48 GDrive-N 32(Adjust) 164 MSCAL SAP 1 49 BDrive-N 32(Adjust) 165 LSCAL DEC 1 50 COOL OFFSET 20 166 LSCAL MONO 1 51 WARM OFFSET 20 167 LSCAL NIC 1 52 RGB 15 168 LSCAL SAP 1 53 PV-BR-MV 32 169 E2D 0 54 PV-CL-MV 32 170 PA-BA-VO 30 55 PV-CT-MV 32 171 PA-TR-VO 55 56 PV-SH-MV 32 172 PA-LM-VO 1 57 PV-BR-SP 32 173 PA-ST-VO 5 58 PV-CL-SP 32 174 PA-LO-VO 0 59 PV-CT-SP 48 175 PA-B1-VO 15 60 PV-SH-SP 32 176 PA-B2-VO 50 61 PV-BR-ST 48 177 PA-B3-VO 50 62 PV-CL-ST 32 178 PA-B4-VO 30 63 PV-CT-ST 48 179 PA-B5-VO 15 64 PV-SH-ST 32 180 PA-BA-MU 30

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65 PV-BR-GA 32 181 PA-TR-MU 40 66 PV-CL-GA 32 182 PA-LM-MU 1 67 PV-CT-GA 16 183 PA-ST-MU 5 68 PV-SH-GA 32 184 PA-LO-MU 0 69 Y SECAM 10 185 PA-B1-MU 63 70 Y NTSC 10 186 PA-B2-MU 45 71 Y PAL 10 187 PA-B3-MU 20 72 YAV1 10 188 PA-B4-MU 45 73 YAV2 10 189 PA-B5-MU 63 74 YSVHS1 10 ( N.A.) 190 PA-BA-TH 55 75 YSVHS2 10 ( N.A.) 191 PA-TR-TH 63 76 ACL 0 192 PA-LM-TH 1 77 MUS 0 193 PA-ST-TH 5 78 PWL 8 194 PA-LO-TH 0 79 CB 0 195 PA-B1-TH 40 80 BPS 0 196 PA-B2-TH 45 81 FCO 0 197 PA-B3-TH 50 82 SVMA 0 198 PA-B4-TH 45 83 SVMD 7 199 PA-B5-TH 40 84 SVMG 3 200 AGC Speed 1 85 SMD 3 201 AGC 20 86 SVM-OSD-PW 3 202 OIF 32 87 SMD-OSD-TM 2 203 IF 2 88 PeakFreqPAL443 2 204 Tuner-0 G 1-T 2-P 0 89 PeakFreqPALM 2 205 SVO 0 90 PeakFreqPALN 2 206 GD 1 91 PeakFreqNTSC443 2 207 BPB 0 92 PeakFreqNTSCM 2 208 DVD1-IN 0 93 PeakFreq SECAM 2 209 AV2-IN 1 94 Peak Freq AV 2 210 CVBS-OUT 1 95 CRAO 0 211 INCL-AV 1 96 VIDEO CORING 0 212 SECAM 1 97 CROMA TRAP 0 213 L 0 98 GAMMA 0 214 TXT-ON 1 99 VA 1 215 TXT-SPILT 1

100 VAI 1 216 TXT-HPOSITION 10 101 Blackstrech 1 217 TXT-CONT 15 102 Bluestrech 1 218 PWR-SAVING 1 103 SVM OPTION 0 219 PWR-PERF 3 104 Whitestrech 1 220 PWR-REST 1 105 PeakRatio0vShot 2 221 PWR-ON KEY 1 106 Tint NTSC 40 222 BUS Stop 0

107 SUB BRI 40 (Adjust) 223

M-Mode 0 (1 For M-

mode)

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108 SUB CON 63 224 Comb Filter 0 109 SUB COL 60 225 BlUe Back Col 1 110 SUB SHAR 40 226 Game 0

111

RC- OPT 64 ( VIDEOCON ) 227 Loudness 1

112 OSO 0 228 Calender - OPT 0 113 FFI 0 229 Lock-opt 1 114 FSL 0 230 EVG 1 115 HP2 0 231 DFL 1 232 XDT 1 233 AKB 0 234 OSVE 0 235 CL 8

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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

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Audio amplifier: DESCRIPTION The TDA7266 is dual bridge amplifier assembled in the Multiwatt package, specially designed for TV & Portable Radio applications.

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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:

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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

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6. Test point Waveforms –

GIII PIN 85

1.5Vpp - B

1.5Vpp - G

1.5Vpp- R

H H H

GIII PIN 86 GIII PIN 87

2.0Vpp

H H

GIII PIN 43

H-OUT C

4.8 Vpp 0.7Vpp - Hor.

1000VPP

2.0 Vpp

H H

VDRA- 0.8 Vpp

V H

CRT KB CRT KG CRT KR

80Vpp

80Vpp

80Vpp

H H H

CRT SUPPLY HEATER– R713

140 Vpp

CRT-PCB- 22Vpp

H H

GIII PIN-67 GIII PIN-66

VDRB-0.8Vpp

V

GIII PIN23 GIII PIN24 GIII PIN36

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7. IC voltages AC supply : 176~260V 50/60Hz

GIII IC

PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

V 0 0 1.74 3.09 3.09 0 3.09 0 3.09 1.41 1.41 0 0.14 2.46 4.92 1.60

PIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

V 2.3 0 2.29 2.30 3.30 0.71 0.66 1.91 1.91 2.31 1.93 0 1.90 1.90 4.14 1.94

PIN 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

V 0.18 NC NC 2.09 2.09 2.29 2.44 0 1.99 1.80 4.87 NC 4.96 2.26 4.87 1.59

PIN 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

V 2.18 2.18 1.39 NC NC NC NC 2.18 2.18 1.39 1.55 2.20 2.20 NC NC NC

PIN 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

V NC 0.26 0.40 0 4.94 NC NC NC 2.08 1.78 NC NC 3.38 1.24 1.24 1.24

PIN 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

V 0 4.91 3.32 3.8 2.94 2.95 2.81 3.07 0 3.11 1.54 0 1.66 3.11 0 1.66

PIN 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112

V 4.82 NC NC 1.76 0 0.03 NC NC NC 3.76 0 3.20 3.20 2.10 NC NC

PIN 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128

V NC 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 PIN 1 2 3 4 5 6 7 8 9

V 0.97 0 14.96 7.50 0 44.6 7.8 0 7.4

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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. 10. Imput a crosshatch signal. 11. Verify that the screen is horizontal. 12. Input red and blue raster signals, and make sure that

purity is properly adjusted.

CRT

WEDGE

DEFLECTION YOKE

P

4 6

P: PURITY MAGNET

4: 4-POLES (convergence magnets)

6: 6-POLES (convergence magnets)

P/C MAGNETS

Fig. 1

PURITY MAGNETS

Long lug

Short lug

Bring the long lug over the short lug

and position them horizontally.

Fig. 2

(FRONT VIEW)

GREEN RASTER

CENTER

Fig. 3

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STATIC CONVERGENCE ADJUSTMENT 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red

and blue lines in the center of the screen (Fig. 1) and turn them to magenta (red/blue).

3. Using 6-pole convergence magnets, overlap the

magenta (red/blue) and green lines in the center of the screen and turn them to white.

4. Repeat 2 and 3 above, and make the best

convergence. DYNAMIC CONVERGENCE ADJUSTMENT 1. Move the deflection yoke up and down and overlap

lines in the periphery. (Fig. 2) 2. Move the deflection yoke left to right and overlap the

lines in the periphery. (Fig. 3) 3. Repeat 1 and 2 above, and make the best

convergence. After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the 6 magnets with glue.

(FRONT VIEW)

Fig. 1

(FRONT VIEW)

RED GREEN BLUE

BLUE

RED

GREEN GREEN

RED BLUE

BLUE GREEN RED

Fig.2

(FRONT VIEW)

RED GREEN BLUE BLUE GREEN RED

RED

GREEN

BLUE

BLUE

GREEN

RED