Table of Contents
Advertisement
Quick Links
Colour Television
Service Manual
Model CE25B3-C
Service Ref. No. CE25B3-C-01
PRODUCT CODE: 111339415
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.
Contents
Safety precautions/Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Cabinet description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Circuit disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Service control adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Circuit alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Important notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Cabinet parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-19
Part No.
SKSM0326
F7PTV
(W.Europe)
OCTOBER 1999
25B3
CE
-C
Advertisement
Table of Contents
Related Manuals for Sanyo CE25B3-C
Summary of Contents for Sanyo CE25B3-C
-
Page 1: Table Of Contents
Colour Television 25B3 Service Manual Model CE25B3-C (W.Europe) Service Ref. No. CE25B3-C-01 PRODUCT CODE: 111339415 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 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 or 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. F7PTV... -
Page 4: Cabinet 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 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: Circuit Disassembly
CABINET DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 7 screws(A). 2. Pull out the cabinet back. F7PTV... -
Page 7: 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. IC3811 IC3801 K38H2 K38H1 AUDIO BOARD CRT BOARD IC1251 IC3451 IC3401... - Page 8 B1 POWER SUPPLY ADJUSTMENT HIGH VOLTAGE & WIDTH ADJUSTMENT 1. Set VR641 to be mechanically centre before pressing [HIGH VOLTAGE ADJUSTMENT] the mains ON/OFF switch. 1. Tune the receiver to the circular pattern. 2. Tune the receiver to a PAL circular pattern. 2.
-
Page 9: Circuit Alignment
CIRCUIT ALIGNMENT 10kΩ 0.002µF 75Ω 1kΩ Output probe VIF alignment Input probe 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: Important Notice
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 11: Cabinet Parts List
645 019 2449 LATCH PUSH,7.9X6.9BK 610 253 2449 AC CORD HOLDER-U-D4VA 610 260 0148 HOLDER RC GBR-BLFA 610 265 4202 HOLDER DC GBR-F3SC 645 023 4316 BADGE,SANYO*46.2X13.5L45 ACCESSORIES JXZB RC TRANSMITTER 645 027 6927 BATTERY SKP10172 INST MANUAL - F7S SKP10173... -
Page 12: Electrical Parts List
Note: Parts order must contain Service Ref. No., Part No., and descriptions. Description Part No. Ref. No. Chassis construction: Read description in the Capacitor and Resistor as follows: SERVICE REF. NO.: CE25B3-C-01 CAPACITOR CERAMIC 100P K 50V ASSY,PWB,MAIN F7PTV 1AA0B10H036K0 (Page 18) - Page 13 Description Ref. No. Part No. Description Part No. Ref. No. IC501 409 192 5709 IC LA7833 C146 403 010 8507 CERAMIC 12P J IC501-1 610 251 5909 V HEAT SINK E7LC C151 403 024 2112 CERAMIC 39P J IC501-2 411 036 3208 SCR PAN+SW+W 3X10 C162 403 068 2512...
- Page 14 Ref. No. Part No. Ref. No. Part No. Description Description C607 404 047 1608 ELECT 270U M 385V R1017 401 024 7430 CARBON 10K JA 1/6W C613 403 179 1213 POLYESTER 4700P J R1018 401 038 3514 MT-GLAZE 330 JA 1/10W C614 403 237 8057 MT-COMPO...
- Page 15 Description Ref. No. Part No. Description Part No. Ref. No. R2005 401 019 1941 CARBON 3K9 JA 1/4W R624 401 068 6902 OXIDE-MT 56 JA R201 401 039 0413 MT-GLAZE 8.2K JA 1/10W R625 401 065 9609 OXIDE-MT 18 JA R202 401 037 5717 MT-GLAZE...
- Page 16 Description Ref. No. Part No. Ref. No. Part No. Description R877 401 039 0413 MT-GLAZE 8.2K JA 1/10W D1021 407 063 8319 ZENER DIODE MTZJ11C R878 401 037 7919 MT-GLAZE 1.5K JA 1/10W D1022 407 063 8319 ZENER DIODE MTZJ11C R879 401 037 5618 MT-GLAZE...
- Page 17 Description Ref. No. Part No. Description Part No. Ref. No. IC001-5 645 009 9601 FIXER 645 008 4058 TERMINAL PLUG J025 401 037 5014 MT-GLAZE 0.000 ZA 1/10W 645 008 4058 TERMINAL PLUG J130 401 037 5014 MT-GLAZE 0.000 ZA 1/10W 645 008 4058 TERMINAL PLUG J151...
- Page 18 Ref. No. Part No. Ref. No. Part No. Description Description INTEGRATED CIRCUIT J3432 401 037 5014 MT-GLAZE 0.000 ZA 1/10W J3467 401 037 5014 MT-GLAZE 0.000 ZA 1/10W IC1251 409 009 2501 IC HD14052BP IC3401 409 371 6206 IC TDA9840/V2 J3469 401 037 5014 MT-GLAZE...
- Page 19 EURO PLUG +2P HOUSE @ 2.1 W902 610 251 5831 GROUNDING CONNECTOR E7LC All information in this manual is correct at the start of production. Sanyo reserves the right to modify components and procedures in order to comply with their continuous improvement policy. -19- F7PTV...
- Page 20 Sanyo Industries (UK) Ltd Printed in UK...