Sanyo CE25B2-C Service Manual
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Sanyo CE25B2-C Service Manual

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Colour Television
Service Manual
CE25B2-C
(W.Europe)
CE25B2-C
Service Ref. No.
PRODUCT CODE: 111327615
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.
SKSM0251
F4GTV
-01
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
63cm diagonal, 110 degree
59cm
680 x 536 x 450 mm
25.5 Kg
JUNE 98
CE25B2-C

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Summary of Contents for Sanyo CE25B2-C

  • Page 1 Colour Television CE25B2-C Service Manual CE25B2-C (W.Europe) CE25B2-C Service Ref. No. PRODUCT CODE: 111327615 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.

  • 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. F4MTV...

  • 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. GREY SCALE ADJ. SIF BOARD SIF 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.

  • Page 8: Circuit Alignment

    CIRCUIT ALIGNMENT 10kΩ 0.002µF 75Ω 1kΩ Output probe Input probe 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...
  • 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 10 610 271 8867 DEC IND-F4MT 610 271 8881 BUTTON UNITED-F4MT 610 273 9251 ASSY,GRILLE SP-F2VA 610 253 2449 AC CORD HOLDER-U-D4VA 645 023 4316 BADGE,SANYO*46.2X13.5L45 610 261 3032 COIL SPRING-E7GCS ACCESSORIES JXZB RC TRANSMITTER SKP10128-A INST MANUAL -F4MT (GB,D,F) SKP10129-A...

  • 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.
  • Page 12 Description Ref. No. Part No. Ref. No. Part No. Description IC1202 409 120 3401 IC LA7221 C141 403 028 4419 CERAMIC 56P J IC201 409 380 8703 IC TDA8361/N5 C142 403 068 0419 CERAMIC 0.1U Z IC271 409 404 0201 IC U3665M C143 403 027 1211 CERAMIC 5P J...
  • Page 13 Ref. No. Part No. Description Part No. Description Ref. No. C514 403 049 4204 ELECT 10U M R1006 401 038 5310 MT-GLAZE 39K JA 1/10W C600 403 076 4000 CERAMIC 4700P K 500V R1007 401 038 3712 MT-GLAZE 33K JA 1/10W R1008 401 027 6628 CARBON 75 JA...
  • Page 14 Description Ref. No. Part No. Ref. No. Part No. Description R1902 401 039 0413 MT-GLAZE 8.2K JA 1/10W R481 401 015 4738 CARBON 180K JA 1/4W R1902A 401 037 5014 MT-GLAZE 0.000 ZA 1/10W R482 401 027 2620 CARBON 5K6 JA 1/6W R1903 401 038 6416 MT-GLAZE...
  • Page 15 Ref. No. Part No. Description Part No. Description Ref. No. R842 401 020 2053 CARBON 4.7K JA 1/4W L1026 645 001 4550 PEAKING COIL 10UHK R843 401 037 5618 MT-GLAZE 10K JA 1/10W L1027 645 001 5656 PEAKING COIL 4.7UH K R844 401 038 5112 MT-GLAZE 3.9K JA 1/10W...

  • Page 16: Assy,Pwb,Sif F2Rt

    Description Ref. No. Part No. Ref. No. Part No. Description D614 408 007 8607 DIODE 1N4148 KR-2 645 008 4058 TERMINAL PLUG 645 008 4058 TERMINAL PLUG D615 408 009 8407 PHOTO COUPLE CNY17GF-3 D616 408 007 8607 DIODE 1N4148 K10B 645 008 7288 HOUSING PLUG 5P D617...

  • Page 17: Assy,Pwb,Audio F2Rt

    Ref. No. Part No. Description Part No. Description Ref. No. CAPACITOR C3435 403 068 3212 CERAMIC 0.033U K C3802 403 069 9510 CERAMIC CHIP 0.01Z 50V C3436 403 074 7617 CERAMIC 5600P K C3803 403 069 9510 CERAMIC CHIP 0.01Z 50V C3437 403 074 7617 CERAMIC 5600P K...
  • Page 18 Description Ref. No. Part No. Ref. No. Part No. Description 1AA0B10E24500 MISCELLANEOUS SP901 610 232 3986 SPEAKER ASSY,PWB,CRT F2RC SP902 610 232 3986 SPEAKER / ! \W901 645 012 7632 EURO PLUG +2P HOUSE @ 2.1 TRANSISTOR W902 610 251 5831 GROUNDING CONNECTOR E7LC Q2601 405 041 6507 TR 2SC2621-D-RA Q2611...
  • Page 19 Ref. No. Part No. Description Part No. Description Ref. No. -19-...
  • Page 20 Description Ref. No. Part No. Ref. No. Part No. Description -20-...
  • Page 21 2SA564(QA,RA), oppure 2SA1015(O,Y) specified on the part service manual and controls adjusted for normal picture. in posizione "OFF". Il voltaggio puo variare CE25B2-C-01 SERVICE REF.NO. sostituti esclusivamente con quelli indi- a meno che sia specificato altrimenti. be used for components replacement Waveforms were taken by using a wide con l'intensita del segnale.
  • Page 22 Main Board /Pannello Principal Circuit side/Lato del Circuito...
  • Page 23 J1EK1745- K1002 :J11B0490N CRT Board /Pannello Cinescopio 64 µ s 64 µ s 90Vp-p 100Vp-p ASSY,PWB,CRT F2RC Component Location/Lato del Componente 1AA0B10E24500 L2601 Q2601 R2604 L1022 L2C1 2SC2688'1' 2SJ12K Z21B0040N B-OUT 331KN SP901 (K:L:M) 134.3V A10B00400 :2SC2621 L1023 L1024 L1025 L1026 J10EA020N <B-DRIVE>...
  • 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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