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Colour Television
Service Manual
Model CE28B3-C
Service Ref. No. CE28B3-C-00
PRODUCT CODE: 111339516
ORIGINAL VERSION: Chassis No. EB4-A
Specifications
Power source
Television system
Colour system
Receiving channel
Aerial input impedance
AV terminal
21 Pin SCART Terminal
Sound output(Music)
Picture tube
(Visible picture diagonal)
Dimensions (WxHxD)
Weight
Part No.
SKSM0300
F7STM
(W.Europe)
AC 220~240V, 50Hz
System B/G
PAL
VHF: E2-E12
CATV: X, Y, Z, S1-S41
UHF: #21~69
75ohm
AV1:CENELEC standard (S-Video
Input)
AV2:CENELEC standard
12 watts x 2
70cm diagonal, 110 degree
66cm
736 x 596 x 500mm
31.6 Kg
FEB 1999
28B3
CE
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.
-C
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Summary of Contents for Sanyo CE28B3-C
- Page 1 Colour Television 28B3 Service Manual Model CE28B3-C (W.Europe) Service Ref. No. CE28B3-C-00 PRODUCT CODE: 111339516 ORIGINAL VERSION: Chassis No. EB4-A Specifications Power source AC 220~240V, 50Hz Television system System B/G Colour system Receiving channel VHF: E2-E12 CATV: X, Y, Z, S1-S41...
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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 shields, barriers, isolation resistor-capacitor networks 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. F7STM... -
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. SIF BOARD SIF ADJ. GREY SCALE 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 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.
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Page 10: Cabinet Parts
CABINET PARTS LIST FOR MODELS CE28B3-C-00 Note: Parts order must contain Service Ref. No., Part No., and descriptions. BASS -/-- Ref. No. Part No. Description Ref. No. Part No. Description CABINET PARTS 610 270 5904 ASSY,CABINET FR-F3SKM 610 261 6057... -
Page 11: Chassis Electrical Parts List
CHASSIS ELECTRICAL PARTS LIST Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by a mark in this parts list and the circuit diagram show components whose value have special significance to product safety. It is particularly recommended that only parts specified on the following parts list be used for components replacement pointed out by the mark. - Page 12 Description Ref. No. Part No. Ref. No. Part No. Description IC501 409 192 5709 IC LA7833 C1901 403 069 1712 CERAMIC 1000P K IC501-1 610 251 5909 V HEAT SINK E7LC C200 403 068 0419 CERAMIC 0.1U Z IC651 409 365 2900 IC BA178M12T C2001 403 068 0419...
- Page 13 Ref. No. Part No. Description Part No. Description Ref. No. C616 403 246 8708 CERAMIC 1000P K R1023 401 038 7611 MT-GLAZE 560 JA 1/10W C617 403 179 2418 POLYESTER 0.022U K R1024 401 038 0711 MT-GLAZE 2.2K JA 1/10W C631 404 060 6505 CERAMIC...
- Page 14 Description Ref. No. Part No. Ref. No. Part No. Description R204 401 024 6720 CARBON 100 JA 1/6W R632 402 000 8602 SOLID 5.6M KA 1/2W R205 401 024 6720 CARBON 100 JA 1/6W R641 401 014 6149 CARBON 150K JA 1/4W R206 401 037 5212...
- Page 15 Ref. No. Part No. Description Part No. Description Ref. No. R884 401 037 7810 MT-GLAZE 150 JA 1/10W D1024 407 063 8319 ZENER DIODE MTZJ11C R885 401 038 5112 MT-GLAZE 3.9K JA 1/10W D1026 407 063 8319 ZENER DIODE MTZJ11C R886 401 037 7810 MT-GLAZE...
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Page 16: Assy,Pwb,Sif F2Rt
Description Ref. No. Part No. Ref. No. Part No. Description J226 401 037 5014 MT-GLAZE 0.000 ZA 1/10W ASSY,PWB,SIF F2RT 1AA0B10E230BA J231 401 037 5014 MT-GLAZE 0.000 ZA 1/10W J232 401 037 5014 MT-GLAZE 0.000 ZA 1/10W TRANSISTOR J233 401 037 5014 MT-GLAZE 0.000 ZA 1/10W Q3801... - Page 17 Ref. No. Part No. Description Part No. Description Ref. No. C3409 403 248 2813 ELECT 2.2U M C3411 403 069 5611 CERAMIC 0.01U K ASSY,PWB,CRT F3SS 1AA0B10E48900 C3412 403 069 5611 CERAMIC 0.01U K C3421 403 069 9510 CERAMIC CHIP 0.01 Z C3422 403 233 0817 ELECT...
- Page 18 Description Ref. No. Part No. Ref. No. Part No. Description SP902 610 232 3986 SPEAKER W901 645 012 7632 EURO PLUG +2P HOUSE @ 2.1 W902 610 204 6090 GROUNDING CONNECTOR-D8ZL -18-...
- Page 19 Ref. No. Part No. Description Part No. Description Ref. No. -19-...
- Page 20 -20- SERVICE MANUAL FOR EB4 CHASSIS SANYO ELECTRIC CO. LTD...
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Page 21: Colour Television
I suddetti componenti devono essere sostituito con 2SA933(Q,R), specified on the part service manual and controls adjusted for normal picture. CE28B3-C-00 posizioni normali ed il commutatore AFC in SERVICE REF.NO. sostituti esclusivamente con quelli indi- 2SA564(QA,RA), oppure 2SA1015(O,Y) - Page 22 Main Board /Pannello Principal Circuit side/Lato del Circuito...
- Page 23 J1EK1745- K1002 :J11B0490N CRT Board /Pannello Cinescopio 64 µ s 90Vp-p 64 µ s 100Vp-p ASSY,PWB,CRT F3SS Component Location/Lato del Componente 1AA0B10E48900 L2601 Q701 R704 L1022 L2C1 2SC2688'1' 2SJ12K Z21B0040N B-OUT 220KN SP901 (K:L:M) 134.3V VS003PGA :2SC2621 L1023 L1024 L1025 L1026 J10EA020N (DRA:ERA)
- Page 24 FRONT-IN K12A J10EA020N K12B J10EA R1251 050N 1/10 GJ2.7K SC2-IN R1252 C1251 1/10 16EM GJ6.8K MONITOR-OUT R1253 1/10 Q1251 GJ82K R1264 2SC2812L6 1/10 :BC848B R1254 GJ82K 1/10 GJ82K Q1252 2SC2812L6 R1263 IC3431 R1257 :BC848B 1/10 TDA8424 1/10 GJ82K C3431 GJ470 R1256 R1262 1/10...
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