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Sanyo CE21B4-C Service Manual
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Sanyo CE21B4-C Service Manual

Sanyo CE21B4-C Service Manual

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Colour Television
Service Manual
Model CE21B4-C
Service Ref. No. CE21B4-C-00
PRODUCT CODE: 111339303
ORIGINAL VERSION: Chassis No. EB4-A
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
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/Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Cabinet disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Service control adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Circuit alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cabinet parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-19
SKSM0396
(W.Europe)
F7JDV
SEPTEMBER 2000
21B4
CE
-C

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Summary of Contents for Sanyo CE21B4-C

  • Page 1: Table Of Contents

    Colour Television 21B4 Service Manual Model CE21B4-C (W.Europe) Service Ref. No. CE21B4-C-00 PRODUCT CODE: 111339303 ORIGINAL VERSION: Chassis No. EB4-A Note This TV receiver will not work properly in foreign countries where the television transmission system and power source differ from the design specifications.

  • 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 when certain that all the protective devices are installed a service is performed on the primary of the converter properly, such as, control knobs, adjustment covers or transformer of the set.

  • Page 3: Block Diagram

    BLOCK DIAGRAM This is a diagram for all models and therefore differs slightly from the actual block diagram. F7JDV...

  • Page 4: Circuit Description

    CIRCUIT DESCRIPTION 1. POWER SUPPLY control) The chroma signal is divided into R-Y and B-Y The power supply circuit of the EB4-A chassis is chroma signals, demodulated in IC201, and output from composed of a rectifier smoothing circuit, an oscillation pin30 (R-Y) and pin31 (B-Y).
  • Page 5 6. HORIZONTAL OUTPUT Pin33: Green output for OSD A horizontal oscillation signal is output from pin37 of Pin34: Red output for OSD IC201 and switches the drive transistor Q431. This Pin35: Blanking output for OSD switching signal is current amplified by the drive Pin36: H-sync.

  • Page 6: Cabinet Disassembly

    CABINET DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 7 screws(A). 2. Pull out the cabinet back. F7JDV...

  • Page 7: Service Control Adjustment

    SERVICE CONTROL ADJUSTMENT B1 POWER SUPPLY ADJ. AFT ADJ. TU-AGC ADJ. MAIN BOARD HIGH VOLTAGE & H-WIDTH ADJ. FOCUS ADJ. V-CENTRE ADJ. V-SIZE ADJ. H-CENTRE ADJ. SIF BOARD SIF ADJ. GREY SCALE ADJ. CRT BOARD IC3811 IC3801 K38H2 K38H1 AUDIO BOARD IC1251 IC3451 IC3401...
  • Page 8 B1 POWER SUPPLY ADJUSTMENT HIGH VOLTAGE & WIDTH ADJUSTMENT 1. Set VR641 to be mechanically centre before [HIGH VOLTAGE ADJUSTMENT] pressing the mains ON/OFF switch. 1. Tune the receiver to the circular pattern. 2. Tune the receiver to a PAL circular pattern. 2.

  • Page 9: Circuit Alignment

    CIRCUIT ALIGNMENT 10kΩ 0.002µF 75Ω 1kΩ Output probe Input probe VIF alignment SETTING Adjustment Waveform DC 15.5V C644 + By using T141, adjust "P" to AGC voltage (4.3-4.5V) IC201-pin48 be maximum amplitude. Output probe IC201-pin45 (Side b) Input probe IC201-pin7 Marker frequency 38.9MHz Sweep ATT...

  • Page 10: Important Notice

    INITIALISATION (Important Notice) When you replace a memory IC (IC802), it is 2. Select the desired service item by using the Function necessary to initialise the IC as following step. button on the remote control handset. 3. Change the data by using the Level + or - button A.

  • Page 11: Cabinet Parts List

    CABINET PARTS LIST FOR MODELS CE21B4-C-00 Note: Parts order must contain Service Ref. No., Part No., and descriptions. WIDE -/-- MENU/ BASS TXT/TV • Item Part No. Description CABINET PARTS 1AA0CAM0164-H ASSY,CABINET FR-F7JDV 610 261 6057 BUTTON POWER-F3SCM 610 272 2192...

  • Page 12: Electrical Parts List

    Note: Parts order must contain Service Ref. No., Part No., and descriptions. Description Ref. No. Part No. Chassis construction CE21B4-C-00 Read description in the Capacitor and Resistor as follows: CAPACITOR ASSY,PWB,MAIN F7JDV 1AA0B10H039C0...
  • Page 13 Ref. No. Part No. Description Part No. Description Ref. No. IC501-1 610 251 5909 V HEAT SINK E7LC C138 403 069 9510 CERAMIC CHIP 0.01 Z 50V IC501-2 411 036 3208 SCR PAN+SW+W 3X10 C141 403 028 4419 CERAMIC 56P J 50V IC501-3 411 004 4404 NUT HEX 3...
  • Page 14 Description Ref. No. Part No. Ref. No. Part No. Description C606 403 076 6727 CERAMIC DE0607-486B102K1K R1007 401 038 3712 MT-GLAZE 33K JA 1/10W C607 404 047 1707 ELECT 220U M 400V R1008 401 027 6628 CARBON 75 JA 1/6W C613 403 179 1213 POLYESTER...
  • Page 15 Ref. No. Part No. Description Part No. Description Ref. No. R1901 401 037 8015 MT-GLAZE 15K JA 1/10W R508 401 025 7825 CARBON 2K2 JA 1/6W R1901A 401 037 5014 MT-GLAZE 0.000 ZA 1/10W R509 401 057 7507 OXIDE-MT 0.82 JA R1902 401 039 0413 MT-GLAZE...
  • Page 16 Description Ref. No. Part No. Ref. No. Part No. Description R864 401 039 0314 MT-GLAZE 820 JA 1/10W L441A 610 000 0605 LINEARITY COIL L442 610 000 0278 COIL R865 401 038 0711 MT-GLAZE 2.2K JA 1/10W L501 645 008 5642 INDUCTOR,3.3U K R866 401 038 0711...
  • Page 17 Ref. No. Part No. Description Part No. Description Ref. No. D685 407 012 4416 DIODE 1SS133-T-77 SW1904 610 011 4432 SWITCH,PUSH D831 408 007 8607 DIODE 1N4148 SW501 1LB4S10B00100 SWITCH,LEVER D861 407 012 4416 DIODE 1SS133-T-77 SW601 645 024 0607 PUSH SW POWER SDDFC3 D871 407 012 4416...
  • Page 18 Description Ref. No. Part No. Ref. No. Part No. Description K38H2 645 027 9294 TERMINAL 4P PB001 610 259 5857 PWB,AUDIO&SIF F2RC TRANSFORMER X3801 421 006 2902 SAW F OFW G9251 T3401 645 015 7943 COIL,FERRITE 2.5M X3811 645 003 2806 CERAMIC FILTER (5.5C) X3814 645 006 3022...
  • Page 19 EURO PLUG +2P HOUSE @ 2.1 W902 610 024 2531 GROUNDING CONNECTOR 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. -19- F7JDV...
  • Page 20 Sanyo Industries (UK) Ltd Printed in UK F7JDV...

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