Sanyo CE25DN7-C Service Manual
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Sanyo CE25DN7-C Service Manual

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
CPU Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12~13
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
All manuals and user guides at all-guides.com
C2VYS
MARCH 2002
25DN7
CE
-C

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  • Page 1: Table Of Contents

    All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com 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.
  • Page 4 All manuals and user guides at all-guides.com 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...
  • Page 5 All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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 All manuals and user guides at all-guides.com 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.
  • Page 11 All manuals and user guides at all-guides.com 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.

  • Page 12: Cpu Functions

    All manuals and user guides at all-guides.com 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...
  • Page 13 All manuals and user guides at all-guides.com 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...

  • Page 14: Component Locations

    All manuals and user guides at all-guides.com COMPONENT LOCATIONS MAIN BOARD A101 T131 IC001 IC802 IC501 Q432 T611 -14- C2VYS...
  • Page 15 All manuals and user guides at all-guides.com CRT BOARD Q701 C735 K7D1 -15- C2VYS...

  • Page 16: Ic Block Diagrams

    All manuals and user guides at all-guides.com 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>...
  • Page 17 All manuals and user guides at all-guides.com 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...
  • Page 18 All manuals and user guides at all-guides.com IC3451 TDA9875A <NICAM & Stereo Sound Decoder> AUXOR SIF1 AUXOL SIF2 -18- C2VYS...
  • Page 19 All manuals and user guides at all-guides.com 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...
  • Page 20 All manuals and user guides at all-guides.com 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.

  • Page 21: Pin Description Of Semiconductors

    All manuals and user guides at all-guides.com 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...

  • 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 All manuals and user guides at all-guides.com Ref. No. Part No. Ref. No. Part No. Description Description 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...

  • Page 24: Electric Parts List

    All manuals and user guides at all-guides.com Ref. No. Part No. Ref. No. Part No. Description Description IC642 409 377 5401 IC L78M09CV DIODE D1001 407 221 7116 ZENER D. UDZS-TE-1712B IC801 410 329 1600 IC ST92R195 D1002 407 221 7116 ZENER D.
  • Page 25 All manuals and user guides at all-guides.com Description Part No. Ref. No. 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...
  • Page 26 All manuals and user guides at all-guides.com Ref. No. Part No. Ref. No. Part 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...
  • Page 27 All manuals and user guides at all-guides.com 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...
  • Page 28 All manuals and user guides at all-guides.com Ref. No. Description Ref. No. Part No. Description Part No. 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...
  • 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 All manuals and user guides at all-guides.com -30- C2VYS...
  • Page 31 All manuals and user guides at all-guides.com -31- C2VZS...
  • Page 32 All manuals and user guides at all-guides.com Sanyo Industries (UK) Ltd Printed in UK -32- C2VYS...
  • Page 33 Transistor 2SC536(Q,R,S), whose values have special significance Kind(Ceramic) C, K, B : Ceramic 6. Voltage readings taken a digital voltmeter are from point indi- CE25DN7-C 2SC1740(Q,R,S), 2SC945A(Q,R,P) or MODEL NUMBER servicing the area, connect an F : Mylar film Rated voltage (1,000V) Diode to product safety.
  • Page 34 All manuals and user guides at all-guides.com MAIN BOARD CL167 CL168 CL177 CL178 CL179 CL171 CL174 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...
  • Page 35 All manuals and user guides at all-guides.com 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...

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