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Colour Television
Service Manual
Model CE25DN4-C
Service Ref.No.: CE25DN4-C-01
PRODUCT CODE: 111339716
ORIGINAL VERSION: Chassis No. EB4-A(MKII)
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
Contents
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Part No. SKSM0309
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F7VVV
APRIL 1999
25DN4
CE
-C
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Summary of Contents for Sanyo CE25DN4-C
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Page 1: Table Of Contents
Colour Television 25DN4 Service Manual Model CE25DN4-C Service Ref.No.: CE25DN4-C-01 PRODUCT CODE: 111339716 ORIGINAL VERSION: Chassis No. EB4-A(MKII) 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/Specifications
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 F7VVV... -
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 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. F7VVV... -
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. CE25DN4-C-01 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 610 278 4800 ASSY,CABINET FR-F7VT... -
Page 12: Electric Parts List
. Note: Parts order must contain Service Ref. No., Part No., and descriptions. Ref. No. Part No. Description Chassis construction CE25DN4-C-01 Read description in the Capacitor and Resistor as follows: OUT OF CIRCUIT-F7VVV (Page 12) CAPACITOR... - Page 13 Ref. No. Part No. Description Ref. No. Part No. Description R741 401 026 9927 CARBON 4K7 JA 1/6W ASSY, TEMPAUDIO-POLISH.2 1AA0B10H030EB R742 401 026 4328 CARBON 3K3 JA 1/6W R744 401 026 0627 CARBON 270 JA 1/6W TRANSISTOR R752 401 024 7430 CARBON 10K JA 1/6W...
- Page 14 Ref. No. Part No. Description Ref. No. Part No. Description R1255 401 038 9318 MT-GLAZE 68K JA 1/10W K34C 645 027 0178 PLUG,3P R1256 401 038 9318 MT-GLAZE 68K JA 1/10W X3451 645 024 7484 OSC,CRYSTAL 24.576MHZ R1257 401 038 9318 MT-GLAZE 68K JA 1/10W ASSY,PWB,MAIN F2VVV...
- Page 15 Ref. No. Part No. Description Ref. No. Part No. Description C005 403 258 3619 ELECT 33U M C141 403 028 4419 CERAMIC 56P J C006 403 258 3619 ELECT 33U M C142 403 068 0419 CERAMIC 0.1U Z C007 403 237 7941 MT-COMPO 0.22U J C143...
- Page 16 Ref. No. Part No. Description Ref. No. Part No. Description C513 403 049 4204 ELECT 10U M R1001 401 038 7611 MT-GLAZE 560 JA 1/10W C514 403 049 4204 ELECT 10U M R1002 401 038 0711 MT-GLAZE 2.2K JA 1/10W C600 403 076 4010 CERAMIC...
- Page 17 Ref. No. Part No. Description Ref. No. Part No. Description R150 401 024 7024 CARBON 1K JA 1/6W R435 402 075 2307 WIRE WOUND 10 JA R151 401 022 1935 CARBON 680 JA 1/4W R436 401 012 7049 CARBON 10K JA 1/4W R152 401 025 3827...
- Page 18 Ref. No. Part No. Description Ref. No. Part No. Description R812 401 038 5112 MT-GLAZE 3.9K JA 1/10W R813 401 018 4933 CARBON 33K JA 1/4W TRANSFORMER R815 401 012 4543 CARBON 100 JA 1/4W TP-A 645 008 4058 TERMINAL PLUG R816 401 038 9219 MT-GLAZE...
- Page 19 401 037 5014 MT-GLAZE 0.000 ZA 1/10W J130 401 037 5014 MT-GLAZE 0.000 ZA 1/10W production. Sanyo reserves the right to modify J151 401 037 5816 MT-GLAZE 1M JA 1/10W components and procedures in order to comply with J194 401 037 5014 MT-GLAZE 0.000 ZA 1/10W...
- Page 20 Sanyo Industries (UK) Ltd Printed in UK...
- Page 21 I suddetti componenti devono essere sostituito con 2SA933(Q,R), specified on the part service manual and controls adjusted for normal picture. CE25DN4-C-01 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 64 µ s 90Vp-p 64 µ s CRT Board /Pannello Cinescopio 100Vp-p Circuit side/Lato del Circuito ASSY,CRT EB4 STEREO MK2 1AA0B10H03500 L2601 L1022 Q701 R704 L2C1 2SC2688'1' 2SJ12K B-OUT 331KN Z21B0040N SP901 (K:L:M) 134.3V VS003PGA :2SC2621 L1023 L1024 L1025 L1026...
- Page 24 ASSY,PWB,AUDIO F3SS K12B 1AA0B10E494BB J10EA050N ASSY,PWB,AUDIO F3JS SC2-IN-R 1AA0B10E412BB IC3500 SC2-IN-L BA178M09T: C3514 C3513 L78M09CV: EM10 MC78M09CT 6800BA C3512 C3511 R1257 R3517 25KK R3518 1/10 0.1BA 1/10 1000GA 1/10 Q1253 GJ1K GJ68K 2SC2812L6 GJ2.2K R1258 :2SC2412KR 12.0V C3522 R1256 R1255 1/10 5.5V 16KK...