Table of Contents
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Colour Television
Chassis:
EB4-A
(MKII)
Service Ref.No.:
CE28DN3-H-04
Contents
Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Cabinet Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Service control adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Circuit alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Special Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electric Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-20
Part No. SKSM0264
Service Manual
F7SZY
MAY 1998
CE28DN3-H
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
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Table of Contents
Related Manuals for Sanyo CE28DN3-H
Summary of Contents for Sanyo CE28DN3-H
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Page 1: Table Of Contents
CE28DN3-H Colour Television Service Manual Chassis: EB4-A (MKII) Service Ref.No.: CE28DN3-H-04 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. -
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 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 This is a diagram for all models and therefore differs slightly from the actual block diagram. Audio Audio Unit SIF Unit EB4 MKII chassis... -
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 Pin25: Black 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 10 screws(A). 2. Pull out the cabinet back. PLACING THE CHASSIS TO SERVICE POSITION 1. Pullout the chassis and put it to the rails on the side cabinet. 2. Fix main board with hook on the top rail. EB4 MKII chassis... -
Page 7: Service Control Adjustment
SERVICE CONTROL ADJUSTMENT B1 POWER SUPPLY ADJUSTMENT 5. Set mode to one horizontal scanning line, how to set 1. Set VR641 to be mechanical centre before pressing refer to "service mode" the main switch. 6. Set screen VR for one colour to be just visible. 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 Waveform Adjustment... -
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. The IC will be initialised automatically to set the following data. -
Page 10: Special Function
SPECIAL FUNCTION 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 prohibition of presetting. Start up programme position ITEM-1 SET ->... -
Page 11: Cabinet Parts List
SERVICE REF. NO. CE28DN3-H-04 CABINET PARTS LIST Note: Parts order must contain Service Ref. No., Part No., and descriptions. SURROUND BASS -/-- MENU Ref. No. Part No. Description Ref. No. Part No. Description CABINET PARTS ACCESSORIES 610 270 5904 ASSY,CABINET FR-F3SKM... -
Page 12: 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 compone nts whose value have special significance to product safety. - Page 13 Ref. No. Part No. Description Ref. No. Part No. Description R3815 401 037 5410 MT-GLAZE 1K JA 1/10W RESISTOR R2601 401 018 2800 CARBON 330 JA 1/4W R3816 401 038 3514 MT-GLAZE 330 JA 1/10W R3817 401 039 0314 MT-GLAZE 820 JA 1/10W R2602 401 019 1901...
- Page 14 Ref. No. Part No. Description Ref. No. Part No. Description C3510 403 069 5611 CERAMIC 0.01U K COIL C3511 403 010 1112 CERAMIC 1000P J L3450 401 037 5014 MT-GLAZE 0.000 ZA 1/10W L3451 645 008 2221 INDUCTOR,2.2U K C3512 403 192 5915 CERAMIC 0.1U K C3513...
- Page 15 Ref. No. Part No. Description Ref. No. Part No. Description Q641 406 007 2106 TR JC546A C1029 403 049 4204 ELECT 10U M Q681 405 059 9804 TR 2SD1913-Q-RA C1031 403 033 4510 CERAMIC 82P J Q682 406 007 1901 TR JC556A C104B 403 043 9106 ELECT 47U M...
- Page 16 Ref. No. Part No. Description Ref. No. Part No. Description C354 403 049 0008 ELECT 1U M C816 403 051 0607 ELECT 4.7U M C361 403 072 5615 CERAMIC 2700P K C818 403 051 0607 ELECT 4.7U M C362 403 069 9510 CERAMIC CHIP 0.01 Z C841 403 069 9510 CERAMIC CHIP 0.01 Z C363...
- Page 17 Ref. No. Part No. Deacription Ref. No. Part No. Deacription R1044 401 039 0314 MT-GLAZE 820 JA 1/10W R2005 401 019 1941 CARBON 3K9 JA 1/4W R1045 401 037 5410 MT-GLAZE 1K JA 1/10W R201 401 039 0413 MT-GLAZE 8.2K JA 1/10W R1046 401 038 0711 MT-GLAZE 2.2K JA 1/10W...
- Page 18 Ref. No. Part No. Description Ref. No. Part No. Description R611 401 027 2620 CARBON 5K6 JA 1/6W R863 401 038 0810 MT-GLAZE 22K JA 1/10W R615 401 025 8228 CARBON 22K JA 1/6W R864 401 038 7611 MT-GLAZE 560 JA 1/10W R617 401 024 7024 CARBON 1K JA...
- Page 19 Ref. No. Part No. Description Ref. No. Part No. Description L152 645 002 1459 PEAKING COIL D615 408 009 8407 PHOTO COUPLE CNY17GF-3 L201 645 001 4710 PEAKING COIL 10UH J D616 408 007 8607 DIODE 1N4148 L202 645 001 4710 PEAKING COIL 10UH J D617 407 007 6616 DIODE ES1 L203...
- Page 20 Ref. No. Part No. Description Ref. No. Part No. Description K1002Z 610 261 2813 MOUNTING BRKT-F2WV K1101 645 016 6433 JACK,RCA-3 PS601 408 013 3801 TH PTH451C262BF140M270 SW1901 610 011 4432 SWITCH,PUSH SW1902 610 011 4432 SWITCH,PUSH SW1903 610 011 4432 SWITCH,PUSH SW1904 610 011 4432 SWITCH,PUSH SW501...
- Page 21 TV. larly recommended that only parts 7. Waveforms were taken with colour bar posizioni normali ed il commutatore AFC CE28DN3-H-04 I suddetti componenti devono essere 2SA564(QA,RA), oppure 2SA1015(O,Y) specified on the part service manual and controls adjusted for normal picture.
- Page 22 J1EK1745- SERVICE REF NO. SERVICE REF NO. K1002 :J11B0490N CE28DN3-H-04 CE28DN3-H-07 64 µ s 64 µ s 64 µ s 64 µ s 90Vp-p 100Vp-p 90Vp-p 100Vp-p ASSY,PWB,CRT F2RC ASSY,CRT EB4 STEREO MK2 1AA0B10E24500 1AA0B10H03500 L2601 L1022 Q2601 R2604 L2C1...
- Page 23 Main Board /Pannello Principal Circuit side/Lato del Circuito...
- Page 24 6.3EM C3476 C3474 C3473 16KK 16KK C3489 C3485 0.01FA 0.33BA: 0.33BA: 16KK 16KK 0.01FA 0.01FA C3477 R3472 R3471 SERVICE REF NO. CE28DN3-H-07 0.33GMB 0.33GMB C3480 1/10 6.3EM 1/10 6.3EM GJ270 GJ270 C3483 C3482 C3481 6.3EM R3478 C3479 0.01FA 0.01FA C3478...
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