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Sanyo CE28CH3-C Service Manual

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Colour Television
Service Manual
Model CE28CH3-C
Service Ref. No. CE28CH3-C-00
PRODUCT CODE: 111361007
ORIGINAL VERSION: Chassis HA2A
Please use Circuit Diagram SKP20352 with this
service manual
Give complete "SERVICE REF. NO." for parts
order or servicing. It is shown on the rating
plate at the cabinet back of the unit.
This T.V. receiver will not work properly in
foreign countries where the television
transmission system and power source
differ from the design specifications. Refer
to the specification table.
CONTENTS
Safety precautions/Specifications ..........................................................................................................2
Block Diagrams..................................................................................................................................3 -9
Cabinet Disassembly ..........................................................................................................................10
Adjustment and Repair Procedures..............................................................................................11 - 15
CPU Functions..............................................................................................................................16 - 17
IC block diagrams ........................................................................................................................18 - 22
Pin description of semi-conductors ......................................................................................................23
Parts description and reading of schematic diagram ..........................................................................24
Cabinet Parts List/TV Stand Parts List ................................................................................................25
Electrical Parts List ........................................................................................................................26- 37
Part No. SKSM0539
C5WHV
MARCH 2002
28CH3
CE
-C

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Summary of Contents for Sanyo CE28CH3-C

  • Page 1: Table Of Contents

    Colour Television 28CH3 Service Manual Model CE28CH3-C Service Ref. No. CE28CH3-C-00 PRODUCT CODE: 111361007 ORIGINAL VERSION: Chassis HA2A Please use Circuit Diagram SKP20352 with this service manual Give complete “SERVICE REF. NO.” for parts order or servicing. It is shown on the rating plate at the cabinet back of the unit.

  • Page 2: Safety Precautions/Specifications

    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 converter transformer of the set.

  • Page 3: Block Diagrams

    CHASSIS DESCRIPTION [Chassis Block Diagrams] This is a basic diagram for all models and therefore differs slightly from the actual block diagram. Outline Fig.-1 C5WHV...
  • Page 4 CHASSIS DESCRIPTION Video signal rooting IF Stage IC101 IC241 IC351 IF/VIDEO/ SHARPNESS MATRIX CHROMA <TDA9178> <TDA9330H> <TDA9321H> SAW Filter IC731 R-VIDEO OUT <TDA6101Q> Y, U, V 2(Y, U, V) DIGITAL SCAN IC721 CONVERTER G-VIDEO OUT H-Sync CIRCUIT <TDA6101Q> Filtering V-Sync circuit Picture Tube IC711...
  • Page 5 CHASSIS DESCRIPTION System control RL649 Q649 Power CVBS input Supply Power ON/OFF Circuit 60 48 49 44-47 43 Key SW Input IC871 IC801 Power Failuer Detect RC Pre-amp. AV1 SW in AV2 SW in AV3 SW in I2C BUS Fig.-4 Deflection circuit DIGITAL SCAN...
  • Page 6 CHASSIS DESCRIPTION [Digital Scan Operation] 100Hz Digital Scan Converter circuit 100Hz converter circuit consists of the following ICs. - TC90A36F, IC7201 Field Progressive Converter - MSM518221A, IC7202, IC7203 Video Memory - TLC2932I, IC7205 PLL (Phase Locked Loop) - MC74HC04AFP, IC7204 invertor The Y-signal output from IC101 is sent to pin 85 of IC7201<TC90A36F>, field progressive converter, after controlling the amplitude level and band-pass limiting by the circuit consist of...
  • Page 7 CHASSIS DESCRIPTION 50Hz 100Hz A' = A, B'= B (b) Double Scan (a) Normal Scan Fig.-7 The U/V-signals are converted in progressive at multiplexer and converted from A to D in 8 bit, and then applied from pins 34 to 41 of IC7201 to pins 1 to 40 and 24 to 27 of IC7203 <MSM518221A>, video memory, for writing.
  • Page 8 CHASSIS DESCRIPTION sampling clock= 16MHz = 1024/1 horiz. sampling clock = 32MHz = 2048/1 horiz. 1024 sampling 2048 sampling 2048 sampling Double Scan Converting (a) Write (b) Read Write Time divided multiplex Read out in double clock B-Y7 R-Y Fig.-8 C5WHV...
  • Page 9 CHASSIS DESCRIPTION Power supply & Protection circuit Fig.-9 C5WHV...

  • Page 10: Cabinet Disassembly

    DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 7 screws (A), 4 screws (B). 2. Pull out the cabinet back. C5WHV...

  • Page 11: Adjustment And Repair Procedures

    SELECT: EXIT : RECALL ADJUST : EXIT : RECALL => SETTINGS FOR CE28CH3-C-00 To set the feature mode + Highlight the desired feature item by using the P or P button. + To change the feature mode, use the Volume - (LEFT) or Volume + (RIGHT) button.
  • Page 12 SERVICE ADJUSTMENTS [SERVICE ADJUSTMENT] Note: Some items of the service adjustments for this chassis are controlled by the CPU, IC801, these adjustments are carried out by using the RC handset. IMPORTANT NOTICE Do not attempt to adjust service adjustments not listed in this manual as it may result in loss of performance and product safety.
  • Page 13 SERVICE ADJUSTMENTS ADJUSTABLE SERVICE ADJUSTMENT IMPORTANT NOTICE Do not attempt to change the data value of service items not listed in the table below otherwise it may cause loss of performance and product safety. If you can not restore the data value of each service item, please initialize the memory IC following to the description below “INITIALIZATION OF MEMORY IC”...
  • Page 14 SERVICE ADJUSTMENTS [ADJUSTMENTS] For how to adjust each service data, please see “SERVICE ADJUSTMENT” on page 12 for entering the service mode , selecting service item and adjusting the service data value. IMPORTANT NOTICE Do not attempt to adjust service adjustments except those requiring readjustments in servicing otherwise it may cause loss of performance and product safety.
  • Page 15 SERVICE ADJUSTMENTS VERTICAL ADJUSTMENT PCC ADJUSTMENT VERTICAL CENTRING ADJUSTMENT 1. Receive circular pattern. 1. Receive circular pattern.. 2. Enter the service mode and select mode “SHAPE”, 2. Enter the service mode and select mode “SHAPE, item item “SHAPE 4.EWP” (see page 12). “SHAPE 13.VSC”...

  • Page 16: Cpu Functions

    CPU PORT FUNCTIONS Pin No. Function Name Function IN/OUT MMU0 MMU3 ADDR10 Address bus 10 ADDR11 Address bus 11 ADDR9 Address bus 9 ADDR8 Address bus 8 OSC-IN Clock Input OSC-OUT Clock Output ADDR13 Address bus 13 ADDR14 Address bus 14 MMU1 MMU2 MMU4...
  • Page 17 Pin No. Function Name Function IN/OUT WSCF VDD-A PXFM RESET Reset Input MCFM JTRSTO TXCF CVBS0 TEST0 CVBS1 CVBS2 GND-A DAT3 Data bus 3 DAT4 Data bus 4 DAT5 Data bus 5 DAT6 Data bus 6 DAT7 Data bus 7 DAT2 Data bus 2 DAT1...

  • Page 18: Ic Block Diagrams

    IC BLOCK DIAGRAMS IC001 TDA7263M <Audio Output> CF COUPL RF1 27K IN -L OUT L IN +L MUTE PROTECTION REFERENCES TURN-ON SUPPLY AND-OFF VOLTAGE PROTECTION IN +R OUT R IN -R TDA7263M RF1 27K CF COUPL IC101 TDA9321H <IIC bus controlled TV input processor> C5WHV...
  • Page 19 IC BLOCK DIAGRAMS IC241 TDA9178T <YUV Picture Improvement> IC351 TDA9330H <IIC bus controlled TV display processor> C5WHV...
  • Page 20 IC BLOCK DIAGRAMS IC711, IC721, IC731 TDA6101Q <Video Output> IC801 ST92R195 <CPU> C5WHV...
  • Page 21 IC BLOCK DIAGRAMS IC1211 MM1313BD <AV Selector> IC3451 TDA9870A <NICAM & Stereo Decoder> AUXOR SIF1 AUXOL SIF2 C5WHV...
  • Page 22 IC BLOCK DIAGRAMS IC7202, IC7203 MSM518221A <Field Memory> IC7204, IC7205 TLC2932 <PLL> C5WHV...

  • Page 23: Pin Description Of Semiconductors

    PIN DESCRIPTION OF SEMICONDUCTORS Diode Diode K: Cathode A: Anode Transistor/FET Transistor/FET C: Collector D: Drain B: Base G: Gate Index E: Emitter S: Source C1 C2 C1 C2 (GND) RESET (IN) (OUT) Index Index Index Index Index Index Index Index Index C5WHV...

  • Page 24: Parts Description And Reading Of Schematic Diagram

    PARTS DESCRIPTION AND READING OF SCHEMATIC DIAGRAM 1. The parts specification of resistors, capacitors and Resistor Reading coils are expressed in designated code. Please Example 1/2 D J 10K B check the parts description by the following code table. Characteristic 2.

  • Page 25: Cabinet Parts List/Tv Stand Parts List

    CABINET PARTS LIST FOR MODEL CE28CH3-C-00 Note: Parts order must contain Service Ref. No., Part No., and descriptions. Key No. Part No. Description Key No. Part No. Description CABINET PART 610 297 9183 BUTTON POWER-C5WA 1AA0CAM0258A- ASSY,CABINET FR-C5WA 610 283 9982...

  • Page 26: Electrical Parts List

    Note: Parts order must contain Service Ref. No., Part No., and descriptions. Ref. No. Part No. Description Chassis construction CE28CH3-C-00 Read description in the Capacitor and Resistor as follows: 013F7SHV OUT OF CIRCUIT F7SHV (Page 26) CAPACITOR 1AA0B10H049D0 ASSY,PWB,PWR&DEF C5WHV (Page 26~ 29)
  • Page 27 Ref. No. Part No. Description Ref. No. Part No. Description C1125 403 069 8315 CERAMIC 0.01U Z C682 403 248 1410 50 YK 1R0 M TA 0511 C1126 403 085 7405 NP-ELECT 10U M C683 403 039 6508 ELECT 100U M C1131 403 233 0817 ELECT...
  • Page 28 Ref. No. Part No. Description Ref. No. Part No. Description L462 645 037 8065 INDUCTOR,S-053-5043 R1912 401 026 9620 CARBON 470 JA 1/6W L465 610 203 9078 COIL 660UH R1913 401 026 9620 CARBON 470 JA 1/6W L502 645 008 5642 INDUCTOR,3.3U K R1914 401 025 8228...
  • Page 29 Ref. No. Part No. Description Ref. No. Part No. Description C1215 403 248 1410 50 YK 1R0 M TA 0511 TRANSFORMER C1216 403 298 9619 CERAMIC 0.1U K T401 610 000 1176 DRIVE TRANS C1217 403 153 9310 CERAMIC 82P J T402 645 041 1625 TRANS,FLYB.
  • Page 30 Ref. No. Part No. Description Ref. No. Part No. Description C234 403 257 0817 50 YK 0R47 M TA 0511 D1234 407 221 7116 ZENER D. UDZS-TE-1712B C236 403 233 1111 ELECT 22U M D1235 407 221 7116 ZENER D. UDZS-TE-1712B C3450 403 160 0020 ELECT...
  • Page 31 Ref. No. Part No. Description Ref. No. Part No. Description Q1262 406 007 2007 TR JC546B R1253 401 105 1610 MT-GLAZE 15K JA 1/16W Q1263 405 134 5925 TR 2SA1037AK-T146-R R1254 401 105 1610 MT-GLAZE 15K JA 1/16W Q1271 405 134 5925 TR 2SA1037AK-T146-R R1255 401 105 5816...
  • Page 32 Ref. No. Part No. Description Ref. No. Part No. Description R218 401 105 0415 MT-GLAZE 100 JA 1/16W TRANSFORMER R219 401 105 0613 MT-GLAZE 10K JA 1/16W T132 645 032 8626 TRANS,OSC,77.8MHZ R221 401 105 0415 MT-GLAZE 100 JA 1/16W R222 401 105 3218 MT-GLAZE...
  • Page 33 Ref. No. Part No. Description Ref. No. Part No. Description C1017 403 049 0800 ELECT 50MS7 1R0MTZ 0407 R1024 401 105 5915 MT-GLAZE 560 JA 1/16W C1018 403 049 0800 ELECT 50MS7 1R0MTZ 0407 R1025 401 105 0514 MT-GLAZE 1K JA 1/16W C1023 403 113 3815 CERAMIC...
  • Page 34 Ref. No. Part No. Description Ref. No. Part No. Description C7325 403 164 0214 CERAMIC 0.1U Z TRANSISTOR C7326 403 164 0214 CERAMIC 0.1U Z Q7211 405 134 5925 TR 2SA1037AK-T146-R C7327 403 164 0214 CERAMIC 0.1U Z Q7221 405 134 5925 TR 2SA1037AK-T146-R C7328 403 164 0214...
  • Page 35 Ref. No. Part No. Description Ref. No. Part No. Description R7332 401 105 4710 MT-GLAZE 39K JA 1/16W 1AA0B10H049BD ASSY,PWB,HOP C5WH R7333 401 105 5816 MT-GLAZE 56 JA 1/16W R7334 401 105 5915 MT-GLAZE 560 JA 1/16W CAPACITOR R7335 401 105 4017 MT-GLAZE 330 JA 1/16W C241...
  • Page 36 Ref. No. Part No. Description Ref. No. Part No. Description 645 004 2720 HOUSING PLUG 6P TRANSISTOR Q261 405 134 5925 TR 2SA1037AK-T146-R 645 008 3389 PLUG,15P S15B-JL-F-E Q271 405 014 4519 TR 2SC2412KT146/R 645 008 3389 PLUG,15P S15B-JL-F-E Q272 405 014 4519 TR 2SC2412KT146/R X351...
  • Page 37 TERMINAL PLUG K16HP2 645 008 4058 TERMINAL PLUG All information in this manual is correct at the start of production. Sanyo reserves the right to modify components and procedures in order to comply with their continuous improvement policy. -37- C5WHV...
  • Page 38 -38- C5WHV...
  • Page 39 -39- C5WHV...
  • Page 40 Printed in the U.K. Sanyo Industries [U.K.] Ltd. -40-...

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