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Colour Television
Service Manual
Model CE21B3-C
Service Ref. No. CE21B3-C-01
PRODUCT CODE: 111339315
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
Cabinet description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Circuit disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Service control adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Circuit alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cabinet parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-19
Part No.
SKSM0327
F7JTV
(W.Europe)
OCTOBER 1999
21B3
CE
-C
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Summary of Contents for Sanyo CE21B3-C
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Page 1: Table Of Contents
Colour Television 21B3 Service Manual Model CE21B3-C (W.Europe) Service Ref. No. CE21B3-C-01 PRODUCT CODE: 111339315 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. F7JTV... -
Page 4: Cabinet 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.
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Page 6: Circuit Disassembly
CABINET DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 7 screws(A). 2. Pull out the cabinet back. F7JTV... -
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.
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Page 9: Circuit Alignment
CIRCUIT ALIGNMENT 10kΩ 0.002µF 75Ω 1kΩ Output probe Input probe VIF alignment Adjustment SETTING 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 CE21B3-C-01 Note: Parts order must contain Service Ref. No., Part No., and descriptions. BASS -/-- Item Part No. Description CABINET PARTS 610 273 1873 ASSY,CABINET FR A-F3JAV 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 Part No. Ref. No. Chassis construction CE21B3-C-01 Read description in the Capacitor and Resistor as follows: CAPACITOR ASSY,PWB,MAIN F7JTV 1AA0B10H018Y0... - 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 IC501-2 411 036 3208 SCR PAN+SW+W 3X10 C141 403 028 4419 CERAMIC 56P J IC501-3 411 004 4404 NUT HEX 3...
- Page 14 Description Ref. No. Part No. Ref. No. Part No. Description C607 404 047 1707 ELECT 220U M 400V R1010 401 027 6628 CARBON 75 JA 1/6W C613 403 179 1213 POLYESTER 4700P J R1011 401 037 5212 MT-GLAZE 100 JA 1/10W C614 403 237 8057 MT-COMPO...
- Page 15 Ref. No. Part No. Description Part No. Description Ref. No. R1905 401 038 0711 MT-GLAZE 2.2K JA 1/10W R619 401 016 1538 CARBON 22 JA 1/4W R1906 401 037 5014 MT-GLAZE 0.000 ZA 1/10W R620 401 007 5815 CARBON 120K JA 1/2W R1907 401 037 5618...
- Page 16 Description Ref. No. Part No. Ref. No. Part No. Description R869 401 038 2210 MT-GLAZE 27K JA 1/10W L641 645 033 2722 BEAD CORE TAIYO YUDEN 52M R870A 401 016 4836 CARBON 22K JA 1/4W L642 645 033 2722 BEAD CORE TAIYO YUDEN 52M R871 401 038 6416 MT-GLAZE...
- Page 17 Ref. No. Part No. Description Part No. Description Ref. No. MISCELLANEOUS SW1904 610 011 4432 SWITCH,PUSH SW501 610 011 2728 SWITCH,LEVER 1P-3T A101 645 023 4118 TUNER,U/V A1901 645 020 9277 UNIT,REMOCON RECEIVER SW601 645 024 0607 PUSH SW POWER SDDFC3 TP-A 645 008 4058...
- Page 18 Description Ref. No. Part No. Ref. No. Part No. Description K38H2 645 027 9294 TERMINAL 4P TRANSFORMER PB001 610 259 5857 PWB,AUDIO&SIF F2RC T3401 645 015 7943 COIL,FERRITE 2.5M X3801 421 006 2902 SAW F OFW G9251 X3811 645 003 2806 CERAMIC FILTER (5.5C) COIL X3814...
- 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-...
- Page 20 Sanyo Industries (UK) Ltd Printed in UK...
- Page 21 Some voltages may vary with sulla massa del chassis, i valori di voltag- ficato altrimenti. lare importanza per il sicuro funziona- CE21B3-C cance to product safety. It is particu- signal strength. Number: gio presi usando un segnale di barre col- mento del TV.
- Page 22 Main Board /Pannello Principal Circuit side/Lato del Circuito FRONT-IN K12A J10EA020N K12B J10EA R1251 050N 1/10 GJ2.7K SC2-IN R1252 C1251 16EM 1/10 GJ6.8K MONITOR-OUT R1253 1/10 Q1251 R1264 GJ82K 2SC2812L6 1/10 :BC848B R1254 GJ82K 1/10 GJ82K Q1252 2SC2812L6 R1263 IC3431 R1257 :BC848B 1/10...
- Page 23 Waveforms on ICs and Transistors J1EK1745- K1002 :J11B0490N IC201-pin7 IC201-pin15 IC201-pin18 IC201-pin19 IC201-pin20 64 µ s 64 µ s 90Vp-p <CVBS out> <CVBS in> <B out> <G out> <R out> 100Vp-p 10 µ s/div. 10 µ s/div. 10 µ s/div. 0.5V/div.
- Page 24 GENERAL BLOCK DIAGRAM FOR EB4 CHASSIS IC801 21P Scart: AV1 21P Scart: AV2 RC Pre.amp Control Keys Audio I/O Video I/O Video I/O Audio I/O 2: Bright 3: Contranst 4: Colour 5: Sharpness V-In Functuin In(AV1/AV2) IC802 V-In Memory IC810 CVBS In 8 Out Band sw.