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Colour Television
Service Manual
Model C28ER57
Service Ref. No. C28ER57-01
PRODUCT CODE: 1113 27204
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.
Specifications
Power source
Television system
Colour system
Receiving channel
Aerial input impedance
AV terminal
21 Pin socket
Sound output(Music)
Picture tube
(Visible picture diagonal)
Dimensions (WxHxD)
Weight
Part No.
SKSM0210
F3SEV
(W.Europe)
AC 220~240V 50Hz
System B/G
PAL
VHF: E2-E12
CATV: X, Y, Z, S1-S41
UHF: #21~69
75ohm
CENELEC standard
12 watts X2
70cm diagonal, 110 degree
66cm
736 x 596 x 500mm
32 Kg
JULY 1997
28D2
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Related Manuals for Sanyo C28ER57
Summary of Contents for Sanyo C28ER57
- Page 1 Colour Television 28D2 Service Manual Model C28ER57 (W.Europe) Service Ref. No. C28ER57-01 PRODUCT CODE: 1113 27204 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.
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Page 2: Safety Precaution
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. F3SEV... -
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: Horizontal Output
6. HORIZONTAL OUTPUT Pin25: Black A horizontal oscillation signal is output from pin37 of Pin26: IREF IC201 and switches the drive transistor Q431. This Pin27: Odd/Even output switching signal is current amplified by the drive Pin28: GND transformer T431 and drives the output transistor Q432. Pin29: - When Q432 becomes ON, an amplifying current flows Pin30: V-deflection stop output... -
Page 6: 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. GREY SCALE ADJ. SIF BOARD SIF ADJ. CRT BOARD IC3811 IC3801 K38H2 K38H1 AUDIO BOARD IC1251 IC3451 IC3401... - Page 7 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 8: 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 9 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 10 CABINET PARTS LIST FOR MODELS C28ER57 Note: Parts order must contain Service Ref. No., Part No., and descriptions. BASS -/-- A•B 1AV0U10B03202 JXRG Item Part No. Description CABINET PARTS 610 264 7556 ASSY,CABINET FR-F3SLV 610 261 6057 BUTTON POWER-F3SCM 610 270 5905...
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Page 11: Chassis Electrical Parts List
Part No. Description Part No. Description Ref. No. Chassis construction Read description in the Capacitor and Resistor as follows: CAPACITOR C28ER57-01 (28D2) CERAMIC 100P K 50V Rated Voltage Tolerance Symbols: ASSY,PWB,MAIN F3SEV 1AA0B10H015Z0 (Page 11) Less than 10PF ASSY,PWB,SIF F2RT... - Page 12 Description Ref. No. Part No. Ref. No. Part No. Description 405 019 2708 TR 2SC536-F-NP 405 064 7505 TR 2SB1274-S-RA 405 019 3804 TR 2SC536-G-NP 405 139 1100 TR 2SB1565-D RA Q1201 406 007 2106 TR JC546A 405 139 1209 TR 2SB1565-E RA 406 007 2007 TR JC546B...
- Page 13 Ref. No. Part No. Description Part No. Description Ref. No. INTEGRATED CIRCUIT C1106 403 069 1702 CERAMIC 1000P K IC001 409 301 4906 IC TDA7263M C1107 403 041 8804 ELECT 10U M IC1201 409 018 7603 IC LA7016 C1108 403 014 9203 CERAMIC 180P J IC1202...
- Page 14 Description Ref. No. Part No. Ref. No. Part No. Description C353 403 073 9107 CERAMIC 4700P K C652 403 069 9500 CERAMIC 0.01U Z C354 403 049 0008 ELECT 1U M C653 403 043 9106 ELECT 47U M C361 403 072 5605 CERAMIC 2700P K C655...
- Page 15 Ref. No. Part No. Description Part No. Description Ref. No. R1028 401 027 6608 CARBON 75 JA 1/6W R2005 401 026 7002 CARBON 3.9K JA 1/6W R1029 401 025 1308 CARBON 150 JA 1/6W R201 401 038 6505 MT-GLAZE 47K JA 1/10W R1031 401 038 0612 MT-GLAZE...
- Page 16 Description Ref. No. Part No. Ref. No. Part No. Description R623 401 025 4200 CARBON 1.8K JA 1/6W R874 401 037 5608 MT-GLAZE 10K JA 1/10W R624 401 068 6902 OXIDE-MT 56 JA R875 401 038 7700 MT-GLAZE 5.6K JA 1/10W R625 401 065 9609 OXIDE-MT...
- Page 17 Ref. No. Part No. Description Part No. Description Ref. No. L461 610 031 1367 INDUCTOR 202J D432 407 005 7308 DIODE EM01Z 610 211 3488 INDUCTOR D438 407 095 8001 DIODE ERD07-15L 645 005 5645 INDUCTOR,2200U K D439 407 006 4108 DIODE ERB44-04 645 007 8361 INDUCTOR,2000U...
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Page 18: Assy,Pwb,Sif F2Rt
Description Ref. No. Part No. Ref. No. Part No. Description 409 026 8005 IC L5630 C3812 403 069 9500 CERAMIC 0.01U Z 409 057 5103 IC UPC574J C3813 403 049 9803 ELECT 2.2U M D681 407 005 7308 DIODE EM01Z C3814 403 049 9803 ELECT... -
Page 19: Assy,Pwb,Crt F2Rc
Ref. No. Part No. Description Part No. Description Ref. No. R1257 401 038 6307 MT-GLAZE 470 JA 1/10W R2622 401 019 1901 CARBON 3.9K JA 1/4W R1258 401 038 0701 MT-GLAZE 2.2K JA 1/10W R2623 401 015 2704 CARBON 1.8K JA 1/4W R1262 401 039 0502... - Page 20 Description Ref. No. Part No. Ref. No. Part No. Description -20-...
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Page 21: Colour Television
Some voltages may vary with gio presi usando un segnale di barre col- lare importanza per il sicuro funziona- ficato altrimenti. 28D2/C28ER57 cance to product safety. It is particu- MODEL NUMBER signal strength. ore sono con tutti i controlli alle loro Il transistore 2SA608(E,F) puo essere 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 C1251 R1252 1/10 16EM GJ6.8K MONITOR-OUT R1253 Q1251 1/10 GJ82K R1264 2SC2812L6 1/10 :BC848B R1254 GJ82K 1/10 GJ82K Q1252 2SC2812L6 R1263 IC3431 R1257 :BC848B 1/10...
- Page 23 J1EK1745- K1002 :J11B0490N ASSY,PWB,CRT F2RC Waveforms on ICs and Transistors 1AA0B10E24500 L2601 L1022 Q2601 R2604 L2C1 2SC2688'1' B-OUT 2SJ12K Z21B0040N 331KN IC201-pin7 IC201-pin15 IC201-pin18 IC201-pin19 IC201-pin20 SP901 (K:L:M) A10B00400 :2SC2621 <CVBS out> <CVBS in> <B out> <G out> <R out> L1023 L1024 L1025...
- Page 24 Main Board /Pannello Principal Component Location/Lato del Componente GENERAL BLOCK DIAGRAM FOR EB4 CHASSIS Audio- Video- Audio- SW1901 SW1902 SW1904 SW1903 input-R input-L Headphones Prog.+ Prog.- input Vol.- Vol.+ IC801 Audio In Video In 21P Scart: AV1 21P Scart: AV2 RC Pre.amp Control Keys Audio I/O...