Service manual

ManualsBrandsSharp ManualsCRT TV25L-M180

25L-M100/180/S100/180

CL25M10,CL25S18

SERVICE MANUAL

COLOR TELEVISION

Chassis No. SN-91

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its

original condition and only parts identical to those specified should be used.

S49F325L-M100

» ELECTRICAL SPECIFICATIONS........................................................................................................ 1

» IMPORTANT SERVICE SAFETY PRECAUTION ............................................................................... 2

» LOCATION OF USER'S CONTROL .................................................................................................... 6

» INSTALLATION AND SERVICE INSTRUCTIONS ............................................................................ 10

» CHASSIS LAYOUT ........................................................................................................................... 16

» BLOCK DIAGRAM ............................................................................................................................ 18

» SCHEMATIC DIAGRAMS ................................................................................................................. 20

» PRINTED WIRING BOARD ASSEMBLIES ....................................................................................... 38

» REPLACEMENT PARTS LIST .......................................................................................................... 41

» PACKING OF THE SET ..................................................................................................................... 49

Page

25L-S100/180

CL25S18

25L-M100/180

CL25M10

SHARP CORPORATION

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

CONTENTS

25L-M100/180, 25L-S100/180

CL25M10, CL25S18

MODELS

ELECTRICAL SPECIFICATIONS

POWER INPUT ................................................... 120 V AC 60 Hz

POWER RATING

25L-M100/180, CL25M10 ................................................. 105 W

25L-S100/180, CL25S18 .................................................. 110 W

PICTURE SIZE ........................................... 2,032cm

(315sq inch)

CONVERGENCE............................................................. Magnetic

SWEEP DEFLECTION ..................................................... Magnetic

FOCUS ............................................... Hi-Bi-Potential Electrostatic

INTERMEDIATE FREQUENCIES

Picture IF Carrier Frequency ..................................... 45.75 MHz

Sound IF Carrier Frequency ...................................... 41.25 MHz

Color Sub-Carrier Frequency..................................... 42.17 MHz

(Nominal)

AUDIO POWER

25L-M100/180, CL25M10 ............... 1.3W (at 10% distortion and

Dual CH Operate)

25L-S100/180, CL25S18 .... 1.3W +1.3W (at 10% distortion and

Dual CH Operate)

SPEAKER

SIZE ...................................................................... 8 cm (Round)

VOICE COIL IMPEDANCE ............................. 32 ohm at 400 Hz

ANTENNA INPUT IMPEDANCE

VHF/UHF .................................................... 75 ohm Unbalanced

TUNING RANGES

VHF-Channels .............................................................. 2 thru 13

UHF-Channels ............................................................ 14 thru 69

CATV Channels .......................................................... 1 thru 125

(EIA, Channel Plan U.S.A.)

Specifications are subject to change without

prior notice.

Summary of content (50 pages)

PAGE 1
25L-M100/180/S100/180 CL25M10,CL25S18 SERVICE MANUAL S49F325L-M100 COLOR TELEVISION Chassis No. SN-91 25L-M100/180 CL25M10 25L-S100/180 CL25S18 MODELS 25L-M100/180, 25L-S100/180 CL25M10, CL25S18 In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. CONTENTS Page » ELECTRICAL SPECIFICATIONS........................................................................
PAGE 2
5L-M100/180/S100/180 CL25M10,CL25S18 IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit should be attempted. 2. Disconnect AC power before servicing. 3. Semiconductor heat sinks are potential shock hazards when the chassis is operating. 4.
PAGE 3
25L-M100/180/S100/180 CL25M10,CL25S18 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon and etc.) and measure the AC voltage drop across the resistor. AII checks must be repeated with the AC ine cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the purpose of completing these check.
PAGE 4
25L-M100/180/S100/180 CL25M10,CL25S18 PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT LIMITES DES RADIATIONS X ET DE LA HAUTE TENSION 1. N'entreprendre aucune modification de tout circuit. C'est dangereux. 2. Débrancher le récepteur avant toute réparation. 3.
PAGE 5
25L-M100/180/S100/180 CL25M10,CL25S18 PRECAUTIONS A PRENDRE LORS DE LA REPARATION (Suite) • Toucher avec la sonde d'essai les pièces métalliques exposées qui présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson, etc.) et mesurer la chute de tension CA en-travers de la résistance. Toutes les vérifications doivent être refaites après avoir inversé la fiche du cordon d'alimentation.
PAGE 6
25L-M100/180/S100/180 CL25M10,CL25S18 LOCATION OF USER'S CONTROL (25L-M100, CL25M10) 6
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25L-M100/180/S100/180 CL25M10,CL25S18 LOCATION OF USER'S CONTROL(Continued) (25L-M180) 7
PAGE 8
25L-M100/180/S100/180 CL25M10,CL25S18 LOCATION OF USER'S CONTROL(Continued) (25L-S100) 8
PAGE 9
25L-M100/180/S100/180 CL25M10,CL25S18 LOCATION OF USER'S CONTROL(Continued) (25L-S180, CL25S18) 9
PAGE 10
25L-M100/180/S100/180 CL25M10,CL25S18 INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. CIRCUIT PROTECTION HIGH VOLTAGE CHECK The receiver is protected by a 4.0A fuse (F701), mounted on PWB-A, wired into one side of the AC line input.
PAGE 11
25L-M100/180/S100/180 CL25M10,CL25S18 For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit. Note: There are still a few analog adjustments in this series such as focus and master screen voltage. Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if service adjustments are required. 1. Service mode To enter the service mode and exit service mode.
PAGE 12
25L-M100/180/S100/180 CL25M10,CL25S18 SERVICE NUMBER DATA ADJUSTMENT ITEM INITIAL VALUE ADJUSTMENT CONTENTS RANGE S01 S02 S03 S04 S05 S06 S07 S08 S09 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 OP PICTURE TINT COLOR BRIGHTNESS SHARPNESS VERTICAL PHASE HORIZONTAL PHASE RF-AGC VERTICAL AMP VCO R CUT-OFF G CUT -OFF B CUT-OFF G GAIN B GAIN TRAP(3.58MHz) BALANCE C.C.POSITION Y-MUTE ENERGY SAVE OFFSET D.D.E.
PAGE 13
25L-M100/180/S100/180 CL25M10,CL25S18 SERVICE ADJUSTMENT VCO Adjustment White Balance Adjustment 1. Connect a digital voltmeter between pin (44) of IC201 and ground. 2. Receive a good local channel. 3. Enter the service mode and select the service adjustment "S10". 4. Adjust the data so that digital voltmeter reads 2.2V. 5. Adjustment is completed, remove the voltmeter, return to "normal" mode. 1. Receive a good local channel. 2.
PAGE 14
25L-M100/180/S100/180 CL25M10,CL25S18 Sub-Brightness Adjustment 3.58MHz Trap Adjustment 1. Receive a good local channel. 2. Make sure the customer brightness control is set to center position. 3. Enter the service mode and select the service adjustment "S04". 4. Adjust "S04" data value to obtain normal brightness level. 1. Receive a good local channel. 2. Enter the service mode and select the service adjustment "S16". 3. This is a two position adjustment, "00" is ON, "01" is OFF. 4.
PAGE 15
25L-M100/180/S100/180 CL25M10,CL25S18 MTS ADJUSTMENT (Only for 25L-S100/180, CL25S18) MTS Level Adjustment 1. Feed the following monaural signal to pin (14) of IC3001. Monaural signal : 300Hz, 245mVrms 2. Connect the rms voltmeter to pin (39) of IC3001. 3. Enter the service mode and select the service adjustment "M01". 4. Adjust the data so that the rms voltmeter reads. 490 ±10mVrms. MTS VCO Adjustment 1. Keep the unit in no-signal state. 2. Connect the frequency counter to pin (39) of IC3001. 3.
PAGE 16
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-M100/180, CL25M10 CHASSIS LAYOUT PWB-B H PWB-H G PWB-A F E D C B A 1 1 2 2 3 4 3 5 64 16 7 5 8 9 6 10
PAGE 17
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-S100/180, CL25S18 CHASSIS LAYOUT PWB-B H PWB-H G PWB-A F E D C B A 10 11 1 12 2 13 143 15 17 4 16 17 5 18 6 19
PAGE 18
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-M100/180, CL25M10 BLOCK DIAGRAM H G F E D C B A 1 1 2 2 3 4 3 5 64 18 7 5 8 9 6 10
PAGE 19
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-S100/180, CL25S18 BLOCK DIAGRAM H G F E D C B A 10 11 1 12 2 13 143 15 19 4 16 17 5 18 6 19
PAGE 20
25L-M100/180/S100/180 CL25M10,CL25S18 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: 1. Photographs taken on a standard gated color bar signal, the tint setting adjusted for proper color. The wave shapes at the red, green and blue cathodes of the picture tube depend on the tint, color level and picture control. 2. indicates waveform check points (See chart, waveforms are measured from point indicated to chassis ground.) NOTES: H 1. The unit of resistance "ohm" is omitted.
PAGE 21
25L-M100/180/S100/180 CL25M10,CL25S18 SCHEMATIC DIAGRAM: CRT and FRONT AV Unit H G F E D Ë 25L-M100/180, CL25M10 Ë 25L-S100/180, CL25S10 C B A 10 11 1 12 2 13 143 15 21 4 16 17 5 18 6 19
PAGE 22
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-M100, CL25M10 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 4 5 6 22 7 8 9 10
PAGE 23
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 23 16 17 18 19
PAGE 24
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-M100, CL25M10 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 4 5 6 24 7 8 9 10
PAGE 25
L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 25 16 17 18 19
PAGE 26
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-M180 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 4 5 6 26 7 8 9 10
PAGE 27
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 27 16 17 18 19
PAGE 28
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-M180 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 4 5 6 28 7 8 9 10
PAGE 29
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 29 16 17 18 19
PAGE 30
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-S100 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 4 5 6 30 7 8 9 10
PAGE 31
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 31 16 17 18 19
PAGE 32
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-S100 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 4 5 6 32 7 8 9 10
PAGE 33
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 33 16 17 18 19
PAGE 34
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-S180, CL25S18 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 4 5 6 34 7 8 9 10
PAGE 35
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 35 16 17 18 19
PAGE 36
25L-M100/180/S100/180 CL25M10,CL25S18 MODELS 25L-S180, CL25S18 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 4 5 6 36 7 8 9 10
PAGE 37
25L-M100/180/S100/180 CL25M10,CL25S18 10 11 12 13 14 15 37 16 17 18 19
PAGE 38
25L-M100/180/S100/180 CL25M10,CL25S18 PRINTED WIRING BOARD ASSEMBLIES H G F E D C B A PWB-A: MAIN Unit (Wiring Side) 1 1 2 2 3 4 3 5 64 38 7 5 8 9 6 10
PAGE 39
25L-M100/180/S100/180 CL25M10,CL25S18 H G F E D C B A 10 PWB-A: MAIN Unit (Chip Parts Side) 11 1 12 2 13 143 15 39 4 16 17 5 18 6 19
PAGE 40
25L-M100/180/S100/180 CL25M10,CL25S18 H G F E PWB-B: CRT Unit (Wiring Side) D C B PWB-H: FRONT AV Unit (Wiring Side) A 1 1 2 2 3 4 3 5 64 40 7 5 8 9 6 10
PAGE 41
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. PARTS LIST Part No. ★ Description LISTE DES PIECES Code Ref. No. Part No. ★ Description Code PARTS REPLACEMENT CHANGE DES PIECES Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features are identified by å and shaded areas in the Replacement Parts Lists and Schematic Diagrams.
PAGE 42
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. Part No. PWB-A: PWB-A: PWB-A: PWB-A: å ★ Description Code Ref. No.
PAGE 43
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. Part No. PWB-A: PWB-A: PWB-A: PWB-A: C402 C403 C404 C405 C406 C408 C409 C410 C411 C412 C413 C414 C421 C422 C451 C452 C453 C501 C502 C510 C511 C512 C513 C514 C515 C516 C517 C518 C551 C552 C606 C607 çå C610 çå C611 C615 C623 C631 C632 C633 C652 C653 C680 C682 å C701 C702 C703 å C705 å C706 C707 C708 C709 C710 C717 C718 C722 å C723 å C725 C726 C727 C729 å C730 å C731 C732 C741 C742 C753 C755 ★ Description Code Ref. No.
PAGE 44
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. ★ Part No. PWB-A: PWB-A: PWB-A: PWB-A: Description Code Ref. No. DUNTK9806WEK0 (25L-M100/CL25M10) DUNTK9806WEK1 (25L-M180) DUNTK9806WEK2 (25L-S100) DUNTK9806WEK3 (25L-S180/CL25S18) MAIN UNIT (Continued) C3014 RC-QZA473TAYK C3015 VCSATA1CE335K C3016 VCE9GA1HW475M C3017 VCSATA1CE106K C3018 VCEA0A1HW105M C3019 VCEA0A1HW475M C3020 VCEA0A1HW475M C3021 VCEA0A1HW475M C3022 VCEA0A1HW475M J 0.047 Mylar (25L-S100/180, CL25S18) J 3.
PAGE 45
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. Part No. PWB-A: PWB-A: PWB-A: PWB-A: R519 R520 R523 å R524 R526 R551 R552 R553 R554 å R604 R605 R606 å R607 å R609 R610 å R611 R622 R623 R624 R625 R626 R627 R631 R632 R633 R634 çå R651 çå R652 çå R653 çå R654 çå R655 R690 å R701 å R702 R704 å R705 å R706 R707 å R709 R710 R711 å R715 å R723 R724 R725 R727 å R728 å å ★ Description Code Ref. No.
PAGE 46
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. ★ Part No. PWB-A: PWB-A: PWB-A: PWB-A: Code Ref. No.
PAGE 47
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. ★ Part No. Description Code Ref. No.
PAGE 48
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. Part No. ★ Description Code Ref. No.
PAGE 49
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. Part No. ★ Description Code No. Part No. PACKING OFRef. THE SET ★ Description Code ★ Polyethylene Bag Operation Manual Registration Card (U.S.A.) Infrared R/C Unit ★ Batteries ★ Polyethylene Foam Sheet ★ Buffer Material FRONT ★ Packing Case Use tapes to fix the packing case. ★ Bar Code Label REAR MARK ★ : Not replacement items.
PAGE 50
25L-M100/180/S100/180 CL25M10,CL25S18 Ref. No. Part No. ★ Description Code Ref. No. ★ Part No. Description Code COPYRIGHT © 1999 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.