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Sanyo CE25DN7-C Service Manual

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Colour Television
Service Manual
Model CE25DN7-C
Service Ref. No. CE25DN7-C-00
PRODUCT CODE: 111351218
ORIGINAL VERSION: Chassis No. EB6-B
Please use Schematic Diagram SKP20357 with
this service manual.
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.
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
Contents
Safety precautions/Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3~5
Cabinet Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Adjustment and Repair Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7~11
Component Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14~15
IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16~20
Pin description of semiconductors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Part Description and reading of schematic diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electric Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24~31
Part No. SKSM0538
C2VYS
MARCH 2002
25DN7
CE
-C

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Summary of Contents for Sanyo CE25DN7-C

  • Page 1: Table Of Contents

    Colour Television 25DN7 Service Manual Model CE25DN7-C Service Ref. No. CE25DN7-C-00 PRODUCT CODE: 111351218 ORIGINAL VERSION: Chassis No. EB6-B Please use Schematic Diagram SKP20357 with this service manual. 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.

  • 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

    Q701 Q711 Aerial Q721 VIDEO-OUT A101 TUNER Q242 X132 Q141 Q243 Q244 IC201 X131 TV-OUT PC-IN POWER Q121~Q133 IF/VIDEO/ CHROMA/ TV-IN SC-1 SIF-IN C BUS C-OUT SC-2 Y-OUT IC801 MONTO SYNC-IN -OUT EW-OUT Refer also IC803 to FIG.-2. MEMORY AV SELECTOR H-OUT T451 NICAM DECODER...

  • Page 4: System Control

    AV Selector NICAM DECODER FROM KH K12H IC1201 LA7952 IC1202 NJM2233BD Q1202 AV3 VIDEO IN FROM MAIN K1101 AV3-L Q1207 AV3-R K12J Y-OUT TV IN SC2 VIDEO IN SC1 VIDEO IN SCART 2 VIDEO OUT Q1203 SC2 L-OUT SC2 R-OUT CTRL B FROM IC801 Q3453 SC2 C-IN...
  • Page 5 Deflection Control IC501 V-Output<LA7833> Deflection Yoke Vert. V-Drive Coil IC201 IF/VIDEO/ Q431 H-Output DEFLECTION Horiz. T431 Q431 <TB1251> Drive Trans Coil H-Drive T451 FlyBack Trans EW-Out Pcc Control Q461 Q462 C2VYS...

  • Page 6: Cabinet Disassembly

    CABINET DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 7 screws(A). 2. Pull out the cabinet back. C2VYS...

  • Page 7: Adjustment And Repair Procedures

    3D SURROUND BG + DK SIF OPTION ADJUST : EXIT : RECALL OPTION SETTINGS FOR CE25DN7-C-00 To set the option mode + Highlight the desired option item by using the P or P button . + To switch the option mode, use the Volume - (LEFT) or Volume + (RIGHT) button.

  • Page 8: 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 (IC803)] The memory IC, IC803, stores the service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be programmed by following “OPTION SETTING”...
  • Page 9 To select the mode and service item and change data value + Highlight the desired adjustment mode by using the P or P button and then press the F/OK button. + To select the adjustment item, use the P or P button.
  • Page 10 ADJUSTMENTS IMPORTANT NOTICE Do not attempt to adjust the following service adjustments except when adjustments are required in servicing otherwise it may cause loss of performance and product safety. DRIVE ADJUSTMENT + B VOLTAGE ADJUSTMENT 6. Select item no.3 “REGULAR 3, GRY” (G-Drive) or 4 “REGULAR 4, GRY”...
  • Page 11 CORNER ADJUSTMENT VERTICAL HEIGHT ADJUSTMENT 1. Receive cross hatch pattern and set screen mode to 1. Receive circular pattern and set screen mode to “FULL”. “FULL”. 2. Enter to the service mode and select mode “WIDE”, 2. Enter to the service mode and select mode “WIDE”, and select item no.

  • Page 12: Cpu Port Functions

    CPU PORT FUNCTIONS Pin No. Function Name Function IN/OUT MMU0 External memory 0 MMU3 External memory 3 ADDR10 Address bus 10 Data Strobe ADDR11 Address bus 11 ADDR9 Address bus 9 ADDR8 Address bus 8 Read Write Strobe Power Supply OSC-IN Clock Input OSC-OUT...
  • Page 13 Pin No. Function Name Function IN/OUT WSCF VPS/WSS Slicer Line PLL VDD-A Analogue Power Supply PXFM Pixel Frequency Multiplier RESET Reset Input (Active L) MCFM Pixel Frequency Multiplier JTRSTO TXCF CVBS0 TEST0 CVBS1 Video signal Input CVBS2 Video Signal Input GND-A DAT3 Data bus 3...

  • Page 14: Component Locations

    COMPONENT LOCATIONS MAIN BOARD A101 T131 IC001 IC802 IC501 Q432 T611 -14- C2VYS...

  • Page 15: Crt Board

    CRT BOARD Q701 C735 K7D1 -15- C2VYS...

  • Page 16: 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 PROTECTION VOLTAGE IN +R OUT R IN -R TDA7263M RF1 27K CF COUPL IC501 LA7833N <Vertical Output> PUMP UP VERTICAL VERTICAL...
  • Page 17 IC201 TB1251AN <IF/Video/Chroma/Def.> H.AFC ABCL IN ref R FBP IN/SCP OUT H Vcc(9V) V OUT H OUT V NFB V RAMP Dig GND V BIAS FILTER B OUT BLACK Det G OUT Dig.VDD R OUT Sync in YC GND Y IN EXT.B IN DC Restor EXT.G IN...
  • Page 18 IC3451 TDA9875A <NICAM & Stereo Sound Decoder> AUXOR SIF1 AUXOL SIF2 -18- C2VYS...
  • Page 19 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 -19-...
  • Page 20 PARTS DESCRIPTION AND READING IN 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 21: Pin Description Of Semiconductors

    CABINET PARTS LIST FOR MODEL CE25DN7-C-00 Note: Parts order must contain Service Ref. No., Part No., and descriptions. Ref. No. Part No. Description Ref. No. Part No. Description CABINET PARTS ACCESSORIES 1AA0CAM0259-D ASSY,CABINET FR-C2VR JXMTA RC TRANSMITTER 1AA2BUM0202A- BUTTON POWER-F7WC...

  • Page 22: Part Description And Reading Of Schematic Diagram

    Note: Parts order must contain Service Ref. No., Part No., and descriptions. Description Part No. Ref. No. Chassis construction CE25DN7-C-00 1AA0B10H050L0 ASSY,PWB,MAIN C2VZS (Page 22~27) 1AA0B10H043L0 NO 3D. NIC.SW.C2KRV...
  • Page 23 Description Ref. No. Part No. Description Ref. No. Part No. C1102 403 113 3815 CERAMIC 1000P K C434 403 054 0703 ELECT 47U M C1107 403 113 3815 CERAMIC 1000P K C437 403 066 6106 MT-POLYEST 0.47U J 250V C1108 403 233 0817 ELECT 10U M...

  • Page 24: Electric Parts List

    Ref. No. Part No. Description Ref. No. Part No. Description IC642 409 377 5401 IC L78M09CV DIODE IC801 410 329 1600 IC ST92R195 D1001 407 221 7116 ZENER D. UDZS-TE-1712B D1002 407 221 7116 ZENER D. UDZS-TE-1712B IC802 410 330 3105 IC M27C1001-12B3 D1003 407 221 7116...
  • Page 25 Ref. No. Part No. Description Part No. Ref. No. Description Q242 405 002 0318 TR 2SA1037K-T96-R R103 401 061 4400 OXIDE-MT 33K JA Q243 405 002 0318 TR 2SA1037K-T96-R R1031 401 105 4710 MT-GLAZE 39K JA 1/16W Q244 405 002 0318 TR 2SA1037K-T96-R R1032 401 105 2914...
  • Page 26 Part No. Ref. No. Part No. Ref. No. Description Description R237 401 024 6720 CARBON 100 JA 1/6W R631 402 000 8602 SOLID 5.6M KA 1/2W R238 401 105 0415 MT-GLAZE 100 JA 1/16W R632 402 000 8602 SOLID 5.6M KA 1/2W R239 401 105 2815...
  • Page 27 Ref. No. Description Ref. No. Part No. Part No. Description R876 401 024 7430 CARBON 10K JA 1/6W KR-1 645 008 4058 TERMINAL PLUG R878 401 024 7430 CARBON 10K JA 1/6W KR-2 645 008 4058 TERMINAL PLUG R879 401 105 0613 MT-GLAZE 10K JA 1/16W K1001...
  • Page 28 Ref. No. Description Ref. No. Part No. Part No. Description C3487 403 248 1410 ELECT 1U M R1232 401 060 6405 OXIDE-MT 27 JA C3492 403 149 9218 CERAMIC 0.01U Z R1235 401 105 1412 MT-GLAZE 150 JA 1/16W C3493 403 149 9218 CERAMIC 0.01U Z...
  • Page 29 EURO PLUG +2P HOUSE @ 2.1 W902 610 286 1600 GND,WIRE CONEC.C2VAV 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. -29- C2VYS...
  • Page 30 -30- C2VYS...
  • Page 31 -31- C2VZS...
  • Page 32 Sanyo Industries (UK) Ltd Printed in UK -32- C2VYS...
  • Page 33 Transistor 2SC536(Q,R,S), whose values have special significance C, K, B : Ceramic 6. Voltage readings taken a digital voltmeter are from point indi- Kind(Ceramic) CE25DN7-C 2SC1740(Q,R,S), 2SC945A(Q,R,P) or MODEL NUMBER servicing the area, connect an F : Mylar film to product safety. It is particularly rec- cated chassis ground.

  • Page 34: Main Board

    MAIN BOARD CL167 CL168 CL171 CL174 CL177 CL178 CL179 CL169 CL170 CL175 CL176 CL048 SW1907 SW1906 SW1905 SW1904 SW1903 SW1902 SW1901 R1909 CL075 CL049 CL089 CL090 CL091 CL092 CL046 R1908 Q682 A1901 CL050 CL093 CL047 R685 CL172 CL112 K1101 CL094 CL113 CL114 R1904...
  • Page 35 MAIN BOARD OPTION SETTING ADJUSTMENTS CPU PORT FUNCTIONS [After replacing the Memory IC (IC803)] Pin No. Function Name Function IN/OUT The memory IC, IC803, stores the option data of TV set and service adjustments data for each circuit, therefore, IMPORTANT NOTICE MMU0 External memory 0 when the memory IC is replaced, it should be performed following setting and SERVICE ADJUSTMENT on next...

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