Sanyo CE28H1A-C-00 Service Manual

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Colour Television

Chassis:

EH1-A

Service Ref. No.:

CE28H1A-C-00

For further technical information, please refer to the

training manual EH1 chassis, ref. No. TI520015.

Give complete "SERVICE REF. NO." for parts order

or servicing, it is shown on the rating sheet on the

cabinet back of the TV set.

Contents

Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Service adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-13

Component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-20

Special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Waveforms & voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-27

Service parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-51

Schematic diagram

Part Number: SKSM0274

Service Manual EH1 chassis

Service Manual

28H1A (CE28H1A-C)

Note

This TV receiver will not work properly in foreign

countries where the television transmission system

and power source differ from the design specifications.

Refer to the specifications for the design specifications

[Europe]

Table of Contents

Summary of Contents for Sanyo CE28H1A-C-00

Page 1: Table Of Contents
28H1A (CE28H1A-C) [Europe] Chassis: EH1-A Service Ref. No.: CE28H1A-C-00 For further technical information, please refer to the training manual EH1 chassis, ref. No. TI520015. Note This TV receiver will not work properly in foreign Give complete "SERVICE REF. NO." for parts order...
Page 2: Safety Precautions
SAFETY PRECAUTION 1: An isolation transformer should be connected in the 3: When replacing a chassis in the cabinet, always be power line between the receiver and the AC line certain that all the protective devices are installed when a service is performed on the primary of the properly, such as, control knobs, adjustment covers or converter transformer of the set.
Page 3: Circuit Description
CIRCUIT DESCRIPTION This is a diagram for all models and therefore differs slightly from the actual block diagram. Outline Service Manual EH1 chassis...
Page 4 Main signal flow This chassis consists of the tuner, IF detector, audio These signals are again input to the audio processor IC, signal processor, video signal processor, AV selector, and are controlled in volume, bass, treble, balance and double scan converter, vertical deflection, horizontal sound mute by the CPU via I C bus.
Page 5 Video signal rooting (Front) AV2-BLK AV2-R,G,B IC204 IC201 IC1200 IC202 X103 IC101 Video Chroma CVBS Def. Q105 Q112 Q1231 Q1201 Q1207 R,G,B Video Y/CVBS Q1202 R,G,B,BLK Video Q1208 IC206 IC207 Video Q831 Q1232 V-sync AV Selector Q832 Q833 H-sync VR1201 IC801 10 12 10 12...
Page 6 Power supply rooting FRONT BOARD Memory V-Driver SUB DEF. BOARD Q681 IC802 IC2341 IC2351 IC2361 IC2351 24LC04 MC74HC74AF CXD2018QP LA6358M RC5V CXD2018QP IC801 IC2391 IC361 IC2311 IC2371 IC2381 IC2331 QXXAV8079 LA6458M UPC1377C LA6393M LA6458M LA6458M CXA1315P IC001 H/V sync.det. C bus D/A TA8216H IC207 M74L532P...
Page 7 System control IC202 VIDEO CHRAMA DEF. Service Manual EH1 chassis...
Page 8: Disassembly
DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 10 screws(A) and 4 screws(B) 2. Pull out the cabinet back. PLACING THE CHASSIS TO SERVICE POSITION 1. Remove 2 screws (C). 2. Release the wires at hooks(D) and hooks(E). 3. Remove an AC cord holder(F). 4.
Page 9: Service Adjustments
SERVICE ADJUSTMENTS Note: Some items of the service adjustments for this chassis are controlled by the CPU, IC801, and the adjustments are carried out by using the RC handset. [After replacing the Memory IC (IC802)] The memory IC, IC802, stores the service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be readjusted the following adjustments and confirmed initial data value, refer to the adjustment table on next page.
Page 10 Adjustment Items and data Table Adjust. items Initial value Status Description +000 +000 ADJSTBL Signal level adjustment for A2 stereo, 500mVrms at 54% dev. on pin 1 of SCART 1 +001 -006 ADJSTBL Separation adjustment for A2 stereo, minimise R signal on pin 3 of SCART 1 +002 STID +000...
Page 11 +063 Xtal +002 Fixed X’tal setting, 0:3.58+3.58, 1:3.58, 2:4.43, 3:4.43+3.58 +064 System +224 Fixed Sub address setting 01 of TDA9134 +065 TintTDA +016 Fixed Tint setting of TDA9143 +066 YDelyPA +010 Fixed Y/C phase setting for PAL (sub address setting 18 of TDA9143) +067 YDelyNT +010...
Page 12 SERVICE ADJUSTMENTS-2 Please refer to the “Component Locations” for the adjustments and test points. VCO ADJUSTMENT VIDEO AMPLITUDE ADJUSTMENT(Europe only) 1. Receive the circular pattern. 1. Receive the PAL colour bar pattern. 2. Adjust the picture to obtain the best picture by using 2.
Page 13 [OUTPUT LEVEL ADJUSTMENT-R-Y] FOCUS ADJUSTMENT 1. Connect oscilloscope between pin 10 of K73C(+) and By using FOCUS VR, adjust focus control for well GND(-). defined scanning lines. 2. Adjust the R-Y signal amplitude to be 0.7Vp-p by using VR7352. 0.7Vp-p [OUTPUT LEVEL ADJUSTMENT-B-Y] 1.
Page 14: Component Locations
COMPONENT LOCATIONS MAIN BOARD (Component side) IC3521 IC3521 TP2A TP2B TP2C -14- Service Manual EH1 chassis...
Page 15 MAIN BOARD (Circuit side) -15- Service Manual EH1 chassis...
Page 16 POWER DEF BOARD (Component side) LIVE SIDE -16- Service Manual EH1 chassis...
Page 17 SUB DEF BOARD (Component side) IC2331 VR391 H-OSC J23HW IC361 H-SIZE Q2314 Q2312 K23M K23N SUB DEF BOARD (Circuit side) IC2361 IC2351 Q361 Q364 IC2341 Q2341 IC2391 IC2371 Q2311 IC2311 Q2313 IC2381 VIDEO BOARD (Component side) Q1753 IC2202 Q2204 Q1751 Q2207 IC2204 Q1752...
Page 18 DOUBLE SCAN BOARD (Component side) IC7223 IC2101 IC7203 IC7215 IC7206 IC7204 IC7222 IC7201 IC7212 T7201 IC7214 VR7201 REF TOP IC7207 CLAMP Q7351 Q7355 Q7359 Q7307 Q7338 Q7304 Q7356 Q7360 Q7352 Q7306 Q7308 Q7301 Q7362 Q7361 Q7358 Q7357 Q7354 Q7353 VR7353 VR7352 VR7351 IC7301...
Page 19 BACK BOARD (Component side) K1001 K1002 IC1201 Q1201 Q1202 Q1204 Q1208 Q1207 Q1002 Q1205 K1003 Q1203 Q1206 JT1201 Q1232 Q1001 Q1231 VR1201 K10W K10Y VIDEO AMP Video Level CRT BOARD (Component side) IC721 G-OUT IC731 IC711 R-OUT B-OUT JTP47G Q721 Q703 Q701 K701...
Page 20 FRONT BOARD (Component side) -20- Service Manual EH1 chassis...
Page 21: Special Functions
SPECIAL FUNCTIONS This TV set allows you to set up the following special functions. Maximum volume setting and prohibition of presetting ITEM-1 Sets the current volume as the maximum volume level and prohibition of presetting. 0 NO 1 YES Start up programme position ITEM-2 Presets the programme position when the set is switched on.
Page 22: Waveforms & Voltages
WAVEFORMS & VOLTAGES On the CRT Board IC711 3.3V 12.2V 3.3V 6.4V 210V 138V 138V 137V IC721 3.3V 12.1V 3.3V 6.4V 210V 141V 142V 140V IC731 3.3V 12.1V 3.3V 6.5V 210V 135V 136V 134V Q711 Q721 Q731 3.6V 3.6V 3.7V 3.0V 3.0V 3.1V...
Page 23 On the Main Board(2) IC202 2.1V 2.4V 2.4V 4.1V 3.8V 8.0V 5.1V 1.8V 3.3V 2.6V 2.5V 2.5V 0.3V 0.7V 5.1V 5.0V 5.0V 3.3V 0.1V 4.0V 3.8V 3.5V 5.0V 2.5V 2.7V IC203 1.1V 3.2V 0.4V 8.0V IC204 5.1V 7.1V 4.2V 5.2V 2.9V 2.9V 1.4V...
Page 24 On the Main Board(3) IC3521 4.5V 4.5V 4.5V 9.0V 4.5V 4.6V 4.6V 4.5V 4.5V 4.5V 4.6V 4.6V 4.6V IC3531 4.5V 5.2V 4.6V 4.6V 4.7V 0.2V 4.6V 4.5V 4.5V 0.1V 4.6V 4.6V 5.5V 5.4V 4.7V 4.5V 1.9V 5.4V 4.7V 4.7V 5.3V 4.6V 9.0V IC3800...
Page 25 On the Power/Def. Board IC652 IC653 15.7V 12.2V 2 -15.6V 3 -12.0V IC501 2 -14.3V 13.1V 0.8V 8 -12.2V Q401 Q402 Q421 Q422 Q471 Q472 Q474 Q554 Q555 135V 2.1V 12.5V 53.8V 32.0V 57.4V 12.3V 11.8V 0.1V 51.7V 13.2V 0.5V -1.6V B 134.5V 2.8V...
Page 26 On the Sub/Def. Board(2) IC361-pin1 IC361-pin3 IC361-pin10 IC361-pin12 IC361-pin18 IC361-pin19 <H sync in> <H osc> <H drive out> <V drive out> <V osc> <V sync in> 10 µ s/div. 10 µ s/div. 10 µ s/div. 2V/div. 2V/div. 2V/div. 5V/div. 2ms/div. 2V/div.
Page 27 On the Back Board IC1201 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.1V 3.7V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 9.0V...
Page 28: Service Parts Lists
SERVICE REF. NO. CE28H1A-C-00 CABINET PARTS LIST Note: Parts order must contain Service Ref. No., Part No., and descriptions. MENU SURROUND BASS -/-- WIDE Ref. No. Part No. Description Ref. No. Part No. Description CABINET PARTS ACCESSORIES 610 266 4195...
Page 29 Note: Parts order must contain Service Ref. No., Part No., and descriptions. Ref. No. Part No. Description Chassis construction: Read description in the Capacitor and Resistor as follows: SERVICE REF. NO.: CE28H1A-C-00 CAPACITOR CERAMIC 100P K 50V 610 265 7159 ASSY,PWB,FRONT F3TV 1AA0B10E35300...
Page 30 Ref. No. Part No. Description Ref. No. Part No. Description 405 019 1909 TR 2SC536-E-NP L601 645 019 3873 LINE FILTER 405 019 2708 TR 2SC536-F-NP L602 645 019 3873 LINE FILTER 405 019 3804 TR 2SC536-G-NP L607 610 237 1000 PIPE CORE L608 610 237 1000...
Page 31 Ref. No. Part No. Description Ref. No. Part No. Description 405 012 2002 TR 2SC1815-GR C432 403 322 3702 POLYPRO 0.2U J 400V 405 012 2101 TR 2SC1815-O C441 403 302 1902 MT-POLYEST 3.9U K 250V 405 012 2309 TR 2SC1815-Y C442 403 109 0900 ELECT...
Page 32 Ref. No. Part No. Description Ref. No. Part No. Description C645 403 053 3606 ELECT 2200U M R601 402 072 1204 WIRE WOUND 1.8 KA C646 403 148 0602 ELECT 220U M 402 075 8309 WIRE WOUND 1.8 KA C651 403 218 3106 ELECT 1000U M...
Page 33 Ref. No. Part No. Description Ref. No. Part No. Description D411 407 157 0806 DIODE RS4FS LF-L1 D552 407 007 9904 DIODE GMA01 D420 407 007 9904 DIODE GMA01 407 012 4406 DIODE 1SS133 407 012 4406 DIODE 1SS133 407 012 5809 DIODE 1SS176 407 012 5809 DIODE 1SS176...
Page 34 Ref. No. Part No. Description Ref. No. Part No. Description 405 015 8902 TR 2SC2812-L7-TB C2111 403 248 2001 ELECT 4.7U M Q2105 405 014 4509 TR 2SC2412K T146 R C2112 403 069 5601 CERAMIC 0.01U K 405 014 4608 TR 2SC2412K T146 S C2113 403 069 5601...
Page 35 Ref. No. Part No. Description Ref. No. Part No. Description C2223 403 248 1905 ELECT 10U M R2144 401 038 3504 MT-GLAZE 330 JA 1/10W C2224 403 070 2606 CERAMIC 0.1U Z R2145 401 038 3504 MT-GLAZE 330 JA 1/10W C2225 403 070 2606 CERAMIC...
Page 36 Ref. No. Part No. Description Ref. No. Part No. Description R2235 401 037 5608 MT-GLAZE 10K JA 1/10W 405 002 6904 TR 2SA1179-M7-TB R2236 401 037 5202 MT-GLAZE 100 JA 1/10W Q7308 405 002 0308 TR 2SA1037K T146 R R2237 401 037 5608 MT-GLAZE 10K JA 1/10W...
Page 37 Ref. No. Part No. Description Ref. No. Part No. Description IC7205 409 223 2004 IC MC74HC74AF-R1 C7314 403 186 5300 NP-ELECT 22U M IC7206 409 286 2904 IC MC74AC04MR1 C7351 403 186 5300 NP-ELECT 22U M IC7207 409 163 6803 IC MC74F374M C7352 403 186 5300...
Page 38 Ref. No. Part No. Description Ref. No. Part No. Description DIODE R7331 401 038 5003 MT-GLAZE 390 JA 1/10W R7332 401 038 5102 MT-GLAZE 3.9K JA 1/10W D7201 407 004 8009 DIODE DSB015-TB R7333 401 037 7909 MT-GLAZE 1.5K JA 1/10W D7202 407 004 8009 DIODE DSB015-TB...
Page 39 Ref. No. Part No. Description Ref. No. Part No. Description 610 267 2268 C732 403 161 9200 MT-POLYEST 0.22U K 250V C737 403 260 0306 ELECT 2.2U M 250V ASSY,PWB,SUB/DEF F3TV (1AA0B10E3980A ) C738 403 072 2604 CERAMIC 0.022U Z C739 403 076 4901 CERAMIC...
Page 40 Ref. No. Part No. Description Ref. No. Part No. Description C363 403 043 0202 ELECT 220U M R2382 401 039 0304 MT-GLAZE 820 JA 1/10W C367 403 049 0008 ELECT 1U M R2383 401 038 6505 MT-GLAZE 47K JA 1/10W C369 403 237 7901 MT-COMPO...
Page 41 Ref. No. Part No. Description Ref. No. Part No. Description 610 267 2275 CAPACITOR C1002 403 041 9405 ELECT 10U M ASSY,PWB,BACK TER. F3TV (1AA0B10E3980B ) C1004 403 049 0800 ELECT 1U M C1006 403 041 9405 ELECT 10U M TRANSISTOR C1008 403 049 0800...
Page 42 Ref. No. Part No. Description Ref. No. Part No. Description R1021 401 038 7601 MT-GLAZE 560 JA 1/10W L1025 645 001 4567 INDUCTOR,10U K R1022 401 038 7700 MT-GLAZE 5.6K JA 1/10W L1026 645 001 4567 INDUCTOR,10U K R1023 401 038 7601 MT-GLAZE 560 JA 1/10W L1028...
Page 43 Ref. No. Part No. Description Ref. No. Part No. Description Q211 405 014 4509 TR 2SC2412K T146 R IC677 409 241 5407 IC BA178M05T 405 015 8704 TR 2SC2812-L6-TB 409 265 4806 IC L78M05CV Q212 405 014 4509 TR 2SC2412K T146 R 409 172 1509 IC MC78M05CT 405 015 8704...
Page 44 Ref. No. Part No. Description Ref. No. Part No. Description C210 403 073 0005 CERAMIC 3300P K C3438 403 070 9803 CERAMIC 0.015U K C211 403 068 0409 CERAMIC 0.1U Z C3439 403 041 8804 ELECT 10U M 403 070 2606 CERAMIC 0.1U Z C3440...
Page 45 Ref. No. Part No. Description Ref. No. Part No. Description 403 070 2606 CERAMIC 0.1U Z R129 401 038 6208 MT-GLAZE 47 JA 1/10W C675 403 043 9106 ELECT 47U M R133 401 038 0701 MT-GLAZE 2.2K JA 1/10W C676 403 068 0409 CERAMIC 0.1U Z...
Page 46 Ref. No. Part No. Description Ref. No. Part No. Description VARIABLE RESISTOR R3533 401 180 0406 MT-GLAZE 7.5K FA 1/10W R3534 401 038 5102 MT-GLAZE 3.9K JA 1/10W VR101 645 006 5521 VR,SEMI,22K N R3535 401 038 5300 MT-GLAZE 39K JA 1/10W TRANSFORMER R354 401 037 5707...
Page 47 Ref. No. Part No. Description Ref. No. Part No. Description -47- F3TE...
Page 48 SANYO ELECTRIC CO. LTD. Service Manual EH1 chassis -48-...
Page 49 SP901 V IN R IN L IN A10B00400 D685 K1101 KR-2 2SC536E-NP 1AA0B10E35300 J30B0250N D684 1SS133 Q682 KR-1 :2SC536F-NP J12B1522N ;1SS176 J30B0250N 1SS133 :2SC536G-NP ASSY,PWB,FRONT F3TV :1SS176 :QT0378A :QT0378B R1101 C1102 PWB=1AA4B10E13100 C1105 R685 C684 KK100 KK100 D686 SP902 EM3.3 A10B00400 1SS133 R1909...
Page 50 FRONT_UNIT K19F (SEE SHEET 1) J11EH100N COIL IC671 BA178M09T :L78M09CV :MC78M09CT R671 2SJ22 C654 R891 J11EH120N 1/10GJ D801 C803 TP8A C671 C672 RC5V EM4.7 J10EA070N TECT 16EM R889 D671 KZ0.1FA C802 C800 C851 R800 1/10GJ 1SS355 :25KZ 6.3EM R806 R804 IC801 0.1FA 0.01...
Page 51 TO FRONT UNIT K16D (SEE SHEET 1) D664 Q664 R666 1S1553:1S2076A 2SC536 J10BP1200 :1S2471:DS442X (E-NP:F-NP RC5V :G-NP) D615 :QT0378(A:B) Power PC113B C632 :EL0199 24V(Audio) <CNY17F-3> J638 J639 24V(Audio) R665 D647 GND(Audio) 1SS(133:176) R601H1 GND(Audio) R601H3 R653 R652 R601A R602A T611 R601 R602H3 7WK1.8...
Page 52 TO FRONT_UNIT K19H TO FRONT_UNIT K19G (SEE SHEET 1) (SEE SHEET 1) J11EH070N J11EH050N FRONT JT110 SC-L R3422 C3448 1/10GJ SC-R R3421 1/10GJ C3415 JWA1 FR-V C3416 C3447 JWB1 R3432 FR-R R3434 1/10GJ C3427 1/10 C3446 FR-L GJ1K C3423 CSMO CSMO CPS1 CPS1...
Page 53 Part No. 1AA6P2P0675-- F3TT (SHEET 3/7)
Page 55 Part No. 1AA6P2P0675-- F3TT (SHEET 4/7)
Page 57 Part No. 1AA6P2P0675-- F3TT (SHEET 5/7)
Page 59 Part No. 1AA6P2P0675-- F3TT (SHEET 6/7)
Page 60 SUB DEF BOARD (Circuit side) SUB DEF BOARD (Component side) IC2331 VR391 H-OSC J23HW IC361 H-SIZE Q2314 Q2312 K23M K23N SUB DEF BOARD (Circuit side) IC2361 IC2351 Q361 Q364 IC2341 Q2341 IC2391 IC2371 Q2311 IC2311 Q2313 IC2381 BACK BOARD (Circuit side) BACK BOARD (Component side) K1001 K1002...
Page 61 Part No. 1AA6P2P0675-- F3TT (SHEET 7/7)
Page 62 SERVICE ADJUSTMENTS SERVICE ADJUSTMENTS-1 Note: Some items of the service adjustments for this chassis are controlled by the CPU, IC801, and the After replacing the memory IC, IC802, folllowing service adjustments must be carried out. adjustments are carried out by using the RC handset. STEREO SEPARATION ADJUSTMENT WHITE BALANCE ADJUSTMENT [After replacing the Menory IC (IC802)]...

Sanyo CE28H1A-C-00 Service Manual

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Table of Contents