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Colour Television
Service Manual
Model CE21BN4-C
Service Ref.No.: CE21BN4-C-00
PRODUCT CODE: 111339306
ORIGINAL VERSION: Chassis No.:EB4-A(MKII)
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/Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4~5
Cabinet Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Service control adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Circuit alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Special Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .,11
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12~21
Part No. SKSM0394
F7JGV
JULY 2000
21BN4
CE
-C
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Summary of Contents for Sanyo CE21BN4-C
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Page 1: Table Of Contents
Colour Television 21BN4 Service Manual Model CE21BN4-C Service Ref.No.: CE21BN4-C-00 PRODUCT CODE: 111339306 ORIGINAL VERSION: Chassis No.:EB4-A(MKII) 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/Specification
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 Diagram
BLOCK DIAGRAM F7JGV... -
Page 4: Circuit Description
CIRCUIT DESCRIPTION 1. POWER SUPPLY chroma signals, demodulated in IC201, and output from The power supply circuit of the EB4-A chassis is pin30 (R-Y) and pin31 (B-Y). These chroma signals pass composed of a rectifier smoothing circuit, an oscillation through the 1H delay line circuit (IC271), and they are circuit, a control circuit and an output rectifier circuit. - Page 5 6. HORIZONTAL OUTPUT Pin26: IREF A horizontal oscillation signal is output from pin37 of Pin27: Odd/Even output IC201 and switches the drive transistor Q431. This Pin28: GND switching signal is current amplified by the drive Pin29: - transformer T431 and drives the output transistor Q432. Pin30: V-deflection stop output When Q432 becomes ON, an amplifying current flows Pin31: RGB REF...
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Page 6: Cabinet Disassembly
CABINET DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 7 screws(A). 2. Pull out the cabinet back. F7JGV... -
Page 7: Service Control Adjustment
SERVICE CONTROL ADJUSTMENT B1 POWER SUPPLY ADJUSTMENT 6. Set screen VR for one colour to be just visible. 1. Set VR641 to be mechanical centre before pressing [BIAS VR ADJUSTMENT] the main switch. 7. By using VR601, VR611 or VR621, adjust line to be 2. -
Page 8: Circuit Alignment
CIRCUIT ALIGNMENT 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 20dB 0dB=176mVrms/75 SIF alignment SETTING Adjustment Waveform... -
Page 9: Important Notice
INITIALIZATION (Important Notice) When you replace a memory IC (IC802), it is necessary to initialise the IC as following step. A. Initialization Press and hold the ( ) normalization button on the remote control handset and press the ( ) programme + button on the TV set. -
Page 10: Special Function
SERVICE REF. NO. CE21BN4-C-00 CABINET PARTS LIST Ref. No. Part No. Description Ref. No. Part Description Note: Parts order must contain Service Ref. No., Part No., and descriptions. WIDE -/-- MENU/ BASS TXT/TV • Ref. No. Part No. Description Ref. No. -
Page 11: Electrical Parts List
Note: Parts order must contain Service Ref. No., Part No., and descriptions. Ref. No. Part No. Description Ref. No. Part No. Description Chassis construction CE21BN4-C-00 Read description in the Capacitor and Resistor as follows: OUT OF CIRCUIT-013F7JGV (Page 12) CAPACITOR 1AA0B10H03500 ASSY,PWB,CRT-MK2 F3SSY (Page 12-13) - Page 12 Ref. No. Part No. Description Ref. No. Part No. Description C721 403 073 2910 CERAMIC 390P K 405 019 2708 TR 2SC536-F-NP C731 403 077 2728 CERAMIC 1000P P 405 019 3804 TR 2SC536-G-NP C735 403 055 8401 ELECT 22U M 250V Q1003 406 007 2106...
- Page 13 Ref. No. Part No. Description Ref. No. Part No. Description 405 028 7909 TR 2SA608-G-CTV-NP 406 007 2007 TR JC546B Q171 406 007 2106 TR JC546A 405 019 1909 TR 2SC536-E-NP 406 007 2007 TR JC546B 405 019 2708 TR 2SC536-F-NP 405 019 1909 TR 2SC536-E-NP 405 019 3804...
- Page 14 Ref. No. Part No. Description Ref. No. Part No. Description C1009 403 041 8804 ELECT 10U M C207 403 068 0409 CERAMIC 0.1U Z C101 403 194 4609 ELECT 470U M 403 070 2606 CERAMIC 0.1U Z C102 403 043 9106 ELECT 47U M C208...
- Page 15 Ref. No. Part No. Description Ref. No. Part No. Description 403 076 7100 CERAMIC 1000P M R007 401 019 9600 CARBON 47 JA 1/4W C606 403 076 6727 CERAMIC DE0607-486B102K1K R008 401 014 4105 CARBON 1.5K JA 1/4W 403 076 7100 CERAMIC 1000P M R009...
- Page 16 Ref. No. Part No. Description Ref. No. Part No. Description R141 401 038 9209 MT-GLAZE 6.8K JA 1/10W R433 401 010 3102 CARBON 470 JA 1/2W R150 401 024 7004 CARBON 1K JA 1/6W R434 401 067 9201 OXIDE-MT 390 JA R151 401 022 1905 CARBON...
- Page 17 Ref. No. Part No. Description Ref. No. Part No. Description R820 401 037 5608 MT-GLAZE 10K JA 1/10W TRANSFORMER R821 401 038 0800 MT-GLAZE 22K JA 1/10W T101 610 037 4508 S COIL 33R4M-7K R822 401 038 6505 MT-GLAZE 47K JA 1/10W T141 610 037 4522 S COIL...
- Page 18 Ref. No. Part No. Description Ref. No. Part No. Description 407 158 3400 ZENER DIODE UZ-11BSC 407 007 6903 DIODE ES1Z D1101 407 063 8309 ZENER DIODE MTZJ11C 408 009 9008 DIODE BYD33D 407 158 3400 ZENER DIODE UZ-11BSC D618 407 013 1008 DIODE 1S1553 D1201...
- Page 19 Ref. No. Part No. Description Ref. No. Part No. Description 645 015 8339 OSC,CRYSTAL 12MHZ C3481 403 248 1618 ELECT 47U M C3482 403 069 9510 CERAMIC CHIP 0.01 Z C3483 403 069 9510 CERAMIC CHIP 0.01 Z ASSY,PWB,SIF-POLI 1AA0B10H030HA C3484 403 248 1618 ELECT...
- Page 20 2.7K 2.7K Figure 1. 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. Sanyo Industries (UK) Ltd Printed in UK...