Sanyo CE28DFN3-B Service Manual
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Sanyo CE28DFN3-B Service Manual

Sanyo CE28DFN3-B Service Manual

Chassis no. eb8-d
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Colour Television
Service Manual
Model CE28DFN3-B
Service Ref. No. CE28DFN3-B-00
PRODUCT CODE: 111361003
ORIGINAL VERSION: Chassis No. EB8-D
Please use Schematic Diagram SKP20528
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
Cabinet Disassembly ......................................................................................................................................4
Adjustment and Repair Procedures............................................................................................................5~9
CPU Functions ..............................................................................................................................................................................10~11
Component Locations ..................................................................................................................................12
IC Block Diagrams ..................................................................................................................................13~15
Pin description of semiconductors ................................................................................................................16
Part Description and reading of schematic diagram ....................................................................................17
Cabinet Parts List ........................................................................................................................................18
Electric Parts List ....................................................................................................................................19~24
Part No. SKSM0794
C7VDS
MARCH 2005
28DFN3
CE
-B

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Summary of Contents for Sanyo CE28DFN3-B

  • Page 1: Table Of Contents

    Colour Television 28DFN3 Service Manual Model CE28DFN3-B Service Ref. No. CE28DFN3-B-00 PRODUCT CODE: 111361003 ORIGINAL VERSION: Chassis No. EB8-D Please use Schematic Diagram SKP20528 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

    BLOCK DIAGRAM This is a diagram for all models and therefore differs slightly from the actual block diagram. Outline C7VDS...

  • Page 4: Cabinet Disassembly

    CABINET DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 9 screws(A) for 28” 2. Pull out the cabinet back. C7VDS...

  • Page 5: Adjustment And Repair Procedures

    SURROUND VIRT SUB WOOFER WIDE ADJUST : EXIT : RECALL OPTION MODE FOR CE28DFN3-B-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 6 SERVICE ADJUSTMENTS After replacing the Memory IC (IC801)] The memory IC, IC801, stores the service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be programmed by using “OPTION SETTING” on previous page and the following adjustments. ADJUSTABLE SERVICE ADJUSTMENT Item No.
  • Page 7 To enter to the Service Mode + Press and hold the GREEN button on the remote control and then press the P button on the cabinet. To select the service item and change data value + To select the adjustment item, use the P or P button.
  • Page 8 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. + B VOLTAGE ADJUSTMENT PCC ADJUSTMENT 1. Receive white raster pattern. PCC ADJUSTMENT 2.
  • Page 9 CORNER ADJUSTMENT VERTICAL ADJUSTMENT 1. Receive cross hatch pattern and set screen mode to “FULL”. VERTICAL CENTRING ADJUSTMENT 2. Enter the service mode and select item no. 25. UC 1. Receive circular pattern and set screen mode to PARABOLA for top corner adjustment OR item no. “FULL”.

  • Page 10: Cpu Functions

    CPU PORT FUNCTIONS Pin No Function Name Function In/Out 1v8_1 1.8v Supply 3.3v Supply Vref 3.3v Reference Vref V Ref Gnd Vref 3.3v Reference Vref V Ref Gnd Vref 3.3v Reference XTAL IN Clock Oscillator XTAL OUT Clock Oscillator Vguard sw Dec Dig 1.8v source supply 5v Supply...
  • Page 11 CPU PORT FUNCTIONS (continued) Pin No Function Name Function In/Out Scan Velocity Modulation FbiSo Flyback In SandCastle Out In/out Hout Horizontal Drive Out VssComb V5Comb 5v Supply Vin/R2/Pr Scart 2 R-In Uin/B2/Pb Scart 2 B-In Yin/G2/Y Scart 2 G-In Y Sync Y Sync Y out Yout...

  • Page 12: Component Locations

    COMPONENT LOCATIONS MAIN BOARD / CRT BOARD B10E00900 R699 R692 IC1601 R637 R691 KGG-2 KGG-1 C650 B10E0090B C023 KF-1 KEM1 D1603 R602 KF-2 K701 C691 C655 IC601 C022 C021 IC601-1 R644 D642 Q461-1 Q461 C468 C642 R435 C803 C686 C203 C214 C209 R441...

  • Page 13: Ic Block Diagrams

    IC BLOCK DIAGRAMS IC001 LA42072-E <Audio Output> STAND BY INPUT AMPLIFIER R In = 20Ko + OUT 1 IN 1 OUTPUT AMPLIFIER - OUT 1 Vcc GND SHORTING PROTECTION CIRCUIT. LOAD SHORTING PROTECTION CIRCUIT THERMAL PROTECTION CIRCUIT PRE GND POWER MUTE + OUT R In = 20Ko...
  • Page 14 IC601 Block Diagram TN6Q03/04 VDD pin Input Under voltage protection Internal power supply Falling edge detection EDGE pin Oscillator Over heat protection Burst On Latch Circuit Burst Off Over voltage protection Latch for Burst circuit Reference Voltage DRAIN pin Over current/FB comparator Logic Driver FB pin...
  • Page 15 -15- C7VDS...

  • Page 16: 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 -16-...

  • Page 17: Part Description And Reading Of Schematic Diagram

    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 18: Cabinet Parts List

    CABINET PARTS LIST FOR MODEL CE28DFN3-B-00 Note: Parts order must contain Service Ref. No., Part No., and descriptions. Item Part No. Description CABINET PARTS 610 319 1287 CABINET FRONT-C7VA 665 000 4375 BUTTON POWER-C7VA 665 000 4382 BUTTON UNITED-C7VA 610 308 4428...

  • Page 19: Electric Parts List

    Note: Parts order must contain Service Ref. No., Part No., and descriptions. Description Part No. Ref. No. Chassis construction CE28DFN3-B-00 013C7VDS ELECTRICAL PARTS (PAGE 19) 1AA0B10H068RA ASSY,PWB,MAIN C7VDS...
  • Page 20 Description Description Ref. No. Part No. Ref. No. Part No. C1033 403 113 3815 GRM188R71H102KA01D PT115 C252 403 215 2211 GRM188R71H103KA01D PT115 C1036 403 323 8815 GRM21BF51C225ZA01K PT115 C256 403 233 0817 ELECT 10U M C257 403 164 0214 GRM188F51E104ZA01D PT115 C1037 403 323 8815 GRM21BF51C225ZA01K PT115...
  • Page 21 Ref. No. Part No. Description Ref. No. Part No. Description D441 407 218 0707 PHOTO COUPLE TLP421 C603 403 076 6727 DEBB33A102KP3A P335 D442 407 149 0817 DIODE 1SS355-TE-17 C604 403 076 6727 DEBB33A102KP3A P335 D445 407 149 0817 DIODE 1SS355-TE-17 C605 404 088 3104 DE1E3KX102MB5BM37...
  • Page 22 Ref. No. Part No. Description Part No. Ref. No. Description L212 645 008 2887 P.COIL LALO2TB5R6K R016 401 105 0613 MT-GLAZE 10K JA 1/16W L213 645 008 2887 P.COIL LALO2TB5R6K R017 401 024 7440 CARBON 10K JA 1/6W L214 645 008 2887 P.COIL LALO2TB5R6K R021...
  • Page 23 Part No. Ref. No. Part No. Ref. No. Description Description R209 401 105 1115 MT-GLAZE 12K JA 1/16W R445 401 024 6730 CARBON 100 JA 1/6W R211 401 024 6730 CARBON 100 JA 1/6W R447 401 105 5311 MT-GLAZE 4.7K JA 1/16W R212 401 024 6730 CARBON...
  • Page 24 Ref. No. Part No. Description Ref. No. Part No. Description R665 401 105 1016 MT-GLAZE 1.2K JA 1/16W J225 401 105 7919 MT-GLAZE 0.000 ZA 1/16W R667 401 061 8903 OXIDE-MT 4.7 JA J240 401 105 7919 MT-GLAZE 0.000 ZA 1/16W J259 401 105 7919 MT-GLAZE...
  • Page 25 610 237 2328 PIPE CORE All information in this manual is correct at the start of L1602 610 237 2328 PIPE CORE production. Sanyo reserves the right to modify components L1603 645 019 3873 LINE FILTER-SAMWHA TECOM L1604 645 042 6735...
  • Page 26 -26- C7VDS...
  • Page 27 -27- C7VDS...
  • Page 28 Sanyo Industries (UK) Ltd Printed in UK -28- C7VDS C7VDS...
  • Page 29 M, N : Polypropylene 7. Waveforms were taken with colour bar and controls adjusted wise noted. CE28DFN3-B MODEL NUMBER the part service manual be used for Z : Metallized paper isolating transformer between for normal picture.
  • Page 30 FRONT BOARDS VOL- VOL+ D1961 A1951 SW1954 SW1953 SW1952 SW1951 R1952 R1966 R1965 R1964 R1963 DANGER K1931 K1131 C1138 LIVE MAINS C1937 R1960 B10E3340A C1136 R1934 SW1601 C1932 RL1601H3 RL1601H2 R1933 L1603 L1132 C1135 L1931 C1933 L1131 C1137 L1936 C1134 R1936 J1131 RL1601H1...
  • Page 31 IC001 LA42072 J10EF100N C055 C402 KZ0.01GQF C040 C052 C1108 CJ220CGQ KK100 C009X C016 C021 C006 R013 R012 C1107 C015 R011 L1108 L1107 25KZ 1/16GJ 25EM C1103 KK100 25KZ 0.22GQF 10KC 0.012GQ 47CD 1/16GJ 0.22GQF C053 C005 1/16GJ 2.7KC C010X R1101 R1106 3.9KC KK0.012GQ...
  • Page 32 50FK0.0 R272 22BE D466 R271 R462 1/16GJ MTZJ20B 1/16GJ 180KC 1/16GZ0C 47KC D465 R269 1SS133 1/16GJ12KC D463 1SS133 C272 R450 DA TE: 26.01.05 ASSY , PWB,MAIN C7VDS KK0.01GQ 6.8K ASSY P ART NUMBER 1AA0B10HO68RA EB8-D C7VDS/CE28DFN3-B FACTORY MODEL NUMBER/MODEL NUMBER...
  • Page 33 MAIN BOARD / CRT BOARD COMPONENT LOCATION B10E00900 R692 R699 IC1601 R637 R691 KGG-2 KGG-1 C650 B10E0090B C023 KF-1 KEM1 D1603 R602 KF-2 K701 C691 C655 IC601 C022 C021 IC601-1 R644 D642 Q461-1 Q461 C468 C642 R435 C803 C686 C203 C214 R441 C209...
  • Page 34 5. Press the LEVEL+ or LEVEL - button to adjust volt- TRAPEZOID ADJUSTMENT age to be 3.2Vdc. OPTION MODE FOR CE28DFN3-B-00 1. Receive cross hatch pattern and set screen mode to “FULL”. 2. Enter the service mode and select item no. 24.

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