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Colour Television
Service Manual
Model: CE28MT2-EH
(E.EUROPE)
Ser Ref No. CE28MT2-EH-01
Product Code: 111325619
Chassis: EC5-A
Original Manual
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 sys-
tem and power source differ from the design
specifications. Refer to the specifications for the
design specifications
SPECIFICATIONS
Power Source
Television System
Colour System
Receiving Channels
Aerial input impedance
Speaker
Sound output
Picture tube
Visible picture
Dimensions (W x H xD) 628 x 567 x 469 mm
Weight
Part No. SKSM0243
F4ZZV MAY 1998
AC220~240V 50Hz
System B/G,D/K
PAL,SECAM
VHF : E2~E12,R1~R2
CATV : X,Y,Z,S1~S41
UHF : 21~69
75ohm
2 X 16ohm, 5 x 9 cm
3W (cont.)
70 cm diagonal, 90˙
66 cm (diagonal)
30.4 kg
CE28MT2-EH
CONTENTS
Safety precautions ..............................2
Main signal routing ..........................3
Power signal routing ........................4
Circuit description .............................5~6
Service control adjustments..............7~8
Circuit alignment .................................9
Memory IC replacement ....................10
Special functions................................11
Cabinet parts list ................................12
Chassis electricl parts list ...............13~20
Schematic Diagram .........................loose
Page
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Summary of Contents for Sanyo CE28MT2-EH
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Page 1: Table Of Contents
CE28MT2-EH Colour Television Service Manual Model: CE28MT2-EH (E.EUROPE) Ser Ref No. CE28MT2-EH-01 Product Code: 111325619 Chassis: EC5-A Original Manual 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
SAFETY PRECAUTION 1: An isolation transformer should be connected in the 3: When replacing a chassis in the cabinet, always be cer- power line between the receiver and the AC line when tain that all the protective devices are installed proper- a service is performed on the primary of the converter ly, such as, control knobs, adjustment covers or transformer of the set. -
Page 3: Block Diagram Main Signal Routing
BLOCK DIAGRAM (Main signal routing) This is a diagram for all models and therefore differs slightly from the actual block diagram. V out V-F/B H out Service manual-EC5 chassis... -
Page 4: Power Signal Routing
(Power supply routing) Service manual-EC5 chassis... -
Page 5: Circuit Description
CIRCUIT DESCRIPTION 1. POWER SUPPLY IC201, and output from pin30 (R-Y) and pin31 (B-Y). The power supply circuit of the EC5-A chassis is com- These chroma signals pass through the 1H delay line cir- posed of a rectifier smoothing circuit, an oscillation circuit, cuit (IC271), and they are input to pin29 (R-Y) and pin28 a control circuit and an output rectifier circuit. - Page 6 ing signal is current amplified by the drive transformer Pin28: GND T431 and drives the output transistor Q432. When Q432 Pin29: - becomes ON, an amplifying current flows directly to DY Pin30: V-deflection stop output(Stop:Lo) through C441/C442 Q432 GND, and defec- Pin31: RGB REF Pin32: Blue output for OSD tion is performed in the last half of the scanning period.
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Page 7: Service Control Adjustments
SERVICE CONTROL ADJUSTMENT B1 POWER SUPPLY ADJ. AFT ADJ. TU-AGC ADJ. MAIN BOARD SW1901 SW1902 SW1903 SW1904 SW1905 SW1906 Prog- Level+ Prog+ Level- Function Memory IC801 F601 SW601 Fuse Mains SW R638 IC802 D615 Memory VR631 +B ADJ. Q612 IC001 T611 Audio output Converter... - Page 8 B1 POWER SUPPLY ADJUSTMENT HIGH VOLTAGE & WIDTH ADJUSTMENT 1. Set VR641 to be mechanical centre before pressing [HIGH VOLTAGE ADJUSTMENT] the main switch. 1. Tune the receiver to circular pattern. 2. Tune the receiver to PAL circular pattern. 2. Set brightness and contrast controls to maximum. 3.
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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: Memory Ic Replacement
MEMORY IC REPLACEMENT (Important Notice) When you replace a memory IC (IC802), it is neces- sary to initialise the IC as follows. A. Initialisation of Memory IC 1. When you press and hold the Recall button on the RC transmitter and then press the Prog + button on the TV set, the following picture will appear on the screen. -
Page 11: Special Functions
Special Function Special Function Maximum volume setting and prohibition of presetting Start up programme position This TV set allows you to set up the following special functions. Maximum volume setting and prohibition of presetting ITEM-1 Sets the current volume as the maximum volume level and ITEM-1 SET 0 prohibition of presetting. -
Page 12: Cabinet Parts List
SERVICE REF. NO. CE28MT2-EH-01 CABINET PARTS LIST Note: Parts order must contain Service Ref. No., Part No., and descriptions. -/-- Ref. No. Part No. Description Ref. No. Part No. Description CABINET PARTS 610 267 0868 ASSY,CABINET FR-F4ZS 610 266 1811... -
Page 13: Chassis Electricl 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 spe- cial significance to product safety. -
Page 14: Integrated Circuit
Ref. No. Part No. Description Ref. No. Part No. Description Q682 406 007 2106 TR JC546A C172 403 068 0419 CERAMIC 0.1U Z Q685 406 007 2106 TR JC546A C173 403 041 8804 ELECT 10U M C2001 403 068 0419 CERAMIC 0.1U Z Q686 406 007 1901 TR JC556A... - Page 15 Ref. No. Part No. Description Ref. No. Part No. Description C615 403 179 3217 POLYESTER 0.015U J R1033 401 037 6714 MT-GLAZE 1.2K JA 1/10W C616 403 165 8427 CERAMIC 680P K R104 401 037 6813 MT-GLAZE 12K JA 1/10W C617 403 179 2418 POLYESTER 0.022U K...
- Page 16 Ref. No. Part No. Description Ref. No. Part No. Description R243 401 025 7429 CARBON 220 JA 1/6W R662 401 069 5607 OXIDE-MT 8.2 JA R251 401 037 5014 MT-GLAZE 0.000 ZA 1/10W R663 401 013 5341 CARBON 1K2 JA 1/4W R252 401 037 5618 MT-GLAZE...
- Page 17 Ref. No. Part No. Description Ref. No. Part No. Description R884 401 038 2111 MT-GLAZE 2.7K JA 1/10W D1910A 610 222 0322 LED HOLDER-G2CA-A R885 401 038 5112 MT-GLAZE 3.9K JA 1/10W D221 407 012 4416 DIODE 1SS133-T-77 R887 401 038 5112 MT-GLAZE 3.9K JA 1/10W D222 408 007 8607 DIODE 1N4148...
- Page 18 Ref. No. Part No. Description Ref. No. Part No. Description KDY-3 645 008 4058 TERMINAL PLUG VARIABLE RESISTOR KDY-5 645 008 4058 TERMINAL PLUG VR701 645 003 5722 VR,SEMI,4.7K N KDY-6 645 008 4058 TERMINAL PLUG VR702 645 003 5647 VR,SEMI,1K N KE-1 645 008 4058 TERMINAL PLUG VR711...
- Page 19 Ref. No. Part No. Description Ref. No. Part No. Description -19- F4ZZV...
- Page 20 Ref. No. Part No. Description Ref. No. Part No. Description -20- F4ZZV...
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Page 21: Colour Television
1S1555, 1S2076, 1S2473, DS442, 1N4148, 1SS176, 1SS133, GMA01 MODEL DIFFERENCES 4. PARTS MARKED WITH ARE RELATED WITH X-RADIATION. P (7DD00021) 1S1553, 1S2076A,1S2471, 1N4148 CE28MT2-EH CE28MT2-EZ 5. THICK LINES ARE 15WATTS SUPPLY LINE. 9. LIST OF REPLACEABLE TRANSISTORS. 6. VIEW OF TR & IC. - Page 23 Waveforms on ICs and Transistors L105 R102/R104/R106 1/10GJ 1/10GJ 1/10GJ TUNE IC201-pin7 IC201-pin15 IC201-pin18 IC201-pin19 IC201-pin20 Q102/Q104/Q106 R105 Q101/Q103/Q105 <CVBS out> <CVBS in> <B out> <G out> <R out> QT0378(A:B): QT0378(A:B): QT0378(A:B): R106 QT0379(A:B): QT0379(A:B): QT0379(A:B): 2SC536(E-NP: 2SC536(E-NP: 2SC536(E-NP: 2SA608(ECNP: 2SA608(ECNP: 2SA608(ECNP: F-NP:G-NP)
- Page 24 V out V-F/B H out...
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