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Colour Television
Service Manual
CE28R2-C
(W.Europe)
Service Ref. No. CE28R2-C-00
PRODUCT CODE: 1113 28004
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.
SKSM0217
F4SEM
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
628 x 569 x 473 mm
30.4 Kg
SEPT 1997
28R2
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Summary of Contents for Sanyo 28R2
- Page 1 Colour Television 28R2 Service Manual CE28R2-C (W.Europe) Service Ref. No. CE28R2-C-00 PRODUCT CODE: 1113 28004 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. F4SEM... -
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 H-WIDTH ADJ. HIGH VOLTAGE FOCUS ADJ. V-CENTRE ADJ. V-SIZE ADJ. H-CENTRE ADJ. GREY SCALE ADJ. SIF BOARD SIF ADJ. T3801 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 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 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 BACK-B-E6ZV 610 270 4952 DOOR-F4SE 610 262 0955 DEC BOARD-E8GWV 610 262 7725 DEC CONTROL SHEET-F4PT 610 104 6336 BADGE,SANYO-D7PA 610 104 2505 LATCH PUSH,7.9X6.9BK 610 210 7302 COIL SPRING-D8HA 610 258 2123 GRILL SP-L-E6ZR 610 258 2130 GRILL SP-R-E6ZR...
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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 CE28R2-C-00 (28R2) CERAMIC 100P K 50V Rated Voltage ASSY,PWB,MAIN F4SEM 1AA0B10H024D0 (Page 11) Tolerance Symbols: 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 406 007 2007 TR JC546B 405 019 3804 TR 2SC536-G-NP 405 019 1909 TR 2SC536-E-NP Q1201 406 007 2106 TR JC546A 405 019 2708 TR 2SC536-F-NP 406 007 2007 TR JC546B 405 019 3804...
- Page 13 Ref. No. Part No. Description Part No. Description Ref. No. IC651 409 143 3402 IC AN78M12 LB C1201 403 041 8804 ELECT 10U M 409 365 2900 IC BA178M12T C1202 403 041 8804 ELECT 10U M 409 026 9507 IC L78M12-RA C1203 403 069 8305 CERAMIC...
- Page 14 Description Ref. No. Part No. Ref. No. Part No. Description / ! \C423 404 044 1700 MT-POLYPRO 5400P J 1.5K C683 403 147 9606 ELECT 1000U M C424 403 083 3914 POLYPRO 0.018U J 400V C684 403 050 6600 ELECT 3.3U M C430 403 075 7101...
- Page 15 Ref. No. Part No. Description Part No. Description Ref. No. R1042 401 037 5608 MT-GLAZE 10K JA 1/10W R205 401 024 6720 CARBON 100 JA 1/6W R1043 401 039 0304 MT-GLAZE 820 JA 1/10W R206 401 037 5202 MT-GLAZE 100 JA 1/10W R1044 401 039 0304 MT-GLAZE...
- Page 16 Description Ref. No. Part No. Ref. No. Part No. Description R641 401 014 6109 CARBON 150K JA 1/4W R884 401 037 7800 MT-GLAZE 150 JA 1/10W R642 401 027 4307 CARBON 6.2K JA 1/6W R885 401 038 5102 MT-GLAZE 3.9K JA 1/10W R643 401 015 4708 CARBON...
- Page 17 Ref. No. Part No. Description Part No. Description Ref. No. L643 645 002 1787 CORE,PIPE 407 151 9102 ZENER DIODE UZ-8.2BCA L871 645 008 0203 INDUCTOR,5.6U K D464 407 053 6605 ZENER DIODE MTZ5.6A L881 645 001 4697 INDUCTOR,1.5U M 407 056 9801 ZENER DIODE RD5.6EB1 407 163 9602...
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Page 18: Assy,Pwb,Sif F2Rt
Description Ref. No. Part No. Ref. No. Part No. Description 407 012 5809 DIODE 1SS176 R3815 401 038 2200 MT-GLAZE 27K JA 1/10W D831 407 005 4505 DIODE DS442X R3845 401 037 5004 MT-GLAZE 0.000 ZA 1/10W 407 013 1008 DIODE 1S1553 R3846 401 037 5004... -
Page 19: Assy,Pwb,Crt F2Rc
Ref. No. Part No. Description Part No. Description Ref. No. R3434 401 037 7909 MT-GLAZE 1.5K JA 1/10W VARIABLE RESISTOR R3435 401 037 5202 MT-GLAZE 100 JA 1/10W VR2601 645 003 5722 VR,SEMI,4.7K N R3436 401 037 7909 MT-GLAZE 1.5K JA 1/10W VR2602 645 003 5647 VR,SEMI,1K N... - Page 20 Description Ref. No. Part No. Ref. No. Part No. Description -20-...
- Page 21 2SA564(QA,RA), or 2SA1015(O,Y) D : Carbon MODEL NUMBER 28R2/CE28R2-C cance to product safety. It is particu- signal strength. Resistance value (1.2Ω) mento del TV. gio presi usando un segnale di barre col- Il transistore 2SA608(E,F) puo essere unless otherwise noted.
- Page 22 Main Board /Pannello Principal Main Board /Pannello Principal REGOLAZIONI DI SERVIZIO TECNICO Circuit side/Lato del Circuito Component Location/Lato del Componente REGOLAZIONE DELL’ALIMENTATORE B1 7. Per regolar il livelli, premere il tasto livello. 1. Regolare VR641 in modo che sia centro meccanico, prima di premere l’interruttore principale.
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