Sharp 25R-M100 Service Manual
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Sharp 25R-M100 Service Manual

Sharp 25R-M100 Service Manual

Chassis no. sn-010
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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.
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» LOCATION OF USER'S CONTROL ..................................................................................................... 4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 5
» CHASSIS LAYOUT ............................................................................................................................. 11
» BLOCK DIAGRAM .............................................................................................................................. 12
» SCHEMATIC DIAGRAMS ................................................................................................................... 13
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 17
» REPLACEMENT PARTS LIST ............................................................................................................ 22
» PACKING OF THE SET ...................................................................................................................... 29
POWER INPUT .................................................... 120 V AC 60 Hz
POWER RATING ................................................................... 95 W
PICTURE SIZE ........................................... 2,032cm
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
AUDIO POWER
OUTPUT RATING ................................ 1.5W (at 10% distortion)

SHARP CORPORATION

SERVICE MANUAL

MODEL
CONTENTS
ELECTRICAL SPECIFICATIONS
SPEAKER
SIZE ...................................................................... 8 cm (Round)
VOICE COIL IMPEDANCE ............................ 32 ohm at 400 Hz
2
(315sq inch)
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
(Nominal)
Specifications are subject to change without
prior notice.
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
1
COLOR TELEVISION
Chassis No. SN-010
25R-M100
(EIA, Channel Plan U.S.A.)
25R-M100
S21O525R-M100
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Summary of Contents for Sharp 25R-M100

  • Page 1: Table Of Contents

    25R-M100 SERVICE MANUAL S21O525R-M100 COLOR TELEVISION Chassis No. SN-010 25R-M100 MODEL 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.

  • Page 2: Important Service Safety Precaution

    25R-M100 IMPORTANT SERVICE SAFETY PRECAUTION Ë 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 1.

  • Page 3: Safety Notice

    25R-M100 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal BEFORE RETURNING THE RECEIVER parts having a return to the chassis (antenna, metal (Fire & Shock Hazard) cabinet, screw heads, knobs and control shafts, escutcheon and etc.) and measure the AC voltage Before returning the receiver to the user, perform drop across the resistor.

  • Page 4: Location Of User's Control

    25R-M100 LOCATION OF USER'S CONTROL Front Panel POWER – VOL + VIDEO/AUDIO IN TERMINALS POWER – VOL + POWER MENU Press → On. Press again → Off. VOLUME UP/DOWN CHANNEL UP/DOWN SENSOR AREA FOR (+) Increases sound. ) Selects next higher channel.

  • Page 5: Installation And Service Instructions

    25R-M100 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. HIGH VOLTAGE CHECK CIRCUIT PROTECTION The receiver is protected by a 4.0A fuse (F701),...
  • Page 6 25R-M100 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 adjusment is required.
  • Page 7 25R-M100 Below are the adjustments ranges and initial values for FIX VALUE category. FIX VALUE DATA SERVICE ADJUST ITEM INITIAL VALUE (Hex) POSITION RANGE OPTION 1 00-FF OPTION 2 00-FF E-SAVE 00-3F TUNER SETUP 00, 01 R-TONE RD 00-7F R-TONE BD...
  • Page 8 25R-M100 SIGNAL DATA SERVICE ADJUST ITEM ADJUSTMENT CONTENTS POSITION RANGE INITIAL VALUE RF AGC 00-3F VIDEO LEVEL 00-07 "01": Y-MUTE, "02": V-STOP & Y-MUTE Y-MUTE 00-03 "03": Activate color killer circuit. SUB BIAS 00-FF Must be "30" R-BIAS 00-FF G-BIAS...

  • Page 9: Service Adjustment

    25R-M100 Ë SERVICE ADJUSTMENT 4. Select the service adjustment "S03" and set the data Note: Before making the service adjustment, make the bus data settings. value to "01" to turn off the luminance signal (Y-mute). +B Adjustment 5. Select the service adjustment "S14" and adjust the data value to obtain 2.35 volts as shown in Figure B.
  • Page 10 25R-M100 Vertical-Size, V-Linearity and V-S Correction Adjustments 1. Receive a good local channel. 2. Enter the service mode DEF category and select the adjustment "D02" for Vertical Size, "D05" for V- Linearity and "D06" for V-S Correction Adjustment. 3. Set in order "D05" for V-Linearity, "D06" for V-S Correction and set the data to get the best linearity.

  • Page 11: Chassis Layout

    25R-M100 CHASSIS LAYOUT...

  • Page 12: Block Diagram

    25R-M100 BLOCK DIAGRAM...

  • Page 13: Schematic Diagrams

    25R-M100 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. (K=k Ω =1000 Ω , M=M Ω ) signal, the tint setting adjusted for proper color. The wave shapes at the red, green and blue cathodes of 2.
  • Page 14 25R-M100 SCHEMATIC DIAGRAM: MAIN Unit...
  • Page 15 25R-M100 SCHEMATIC DIAGRAM: CRT and FRONT A/V Unit...

  • Page 16: Printed Wiring Board Assemblies

    25R-M100 PRINTED WIRING BOARD ASSEMBLIES PWB-B: CRT Unit (Wiring Side) PWB-H: FRONT A/V Unit (Wiring Side)
  • Page 17 25R-M100 PWB-A: MAIN Unit (Wiring Side)
  • Page 18 25R-M100 PWB-A: MAIN Unit (Chip Parts Side)

  • Page 19: Replacement Parts List

    2. REF. NO. VTUENV56D82-1 3. PART NO. 4. DESCRIPTION in USA: Contact your nearest SHARP Parts Distributor to order. For location of SHARP Parts Distributor, Please call Toll- INTEGRATED CIRCUITS Free; 1-800-BE-SHARP IC201 RH-iX3354CEN1 X I.C. ' å IC351 VHiAN7511//-1...
  • Page 20 25R-M100 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA450WEV0 D708 VHD1SS119//-1 J Diode MAIN UNIT (Continued) VHD1SS244//-1 D709 RH-DX0229CEZZ J Diode å Q702 VS2SC3198-Y-1 J 2SC3198-Y å å D712 RH-DX0487CEZZ J Diode VS2SC945AQ/-1 RH-DX0302CEZZ...
  • Page 21 25R-M100 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA450WEV0 C703 RC-KZ0029CEZZ J 0.01 Ceramic AC250V MAIN UNIT (Continued) RC-KZ0016CEZZ C705 RC-EZ0800CEZZ J 560 200V EL. å CAPACITORS [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film] RC-EZ1336CEZZ VCEA0A1AW108M J 1000 10V VCEA0A1HW105M J 1.0...
  • Page 22 25R-M100 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA450WEV0 R458 VRD-RA2EE564J J 560k 1/4W Carbon R461 VRS-CY1JF274J J 270k 1/16W M-Ox. MAIN UNIT (Continued) R462 VRS-CY1JF563J J 56k 1/16W M-Ox. R491 VRS-CY1JF102J J 1.0k 1/16W M-Ox.
  • Page 23 25R-M100 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA450WEV0 R2501 VRS-CY1JF123J J 12k 1/16W M-Ox. R2503 VRS-CY1JF273J J 27k 1/16W M-Ox. MAIN UNIT (Continued) R2504 VRS-CY1JF123J J 12k 1/16W M-Ox. R2505 VRS-CY1JF563J J 56k 1/16W M-Ox.

  • Page 24: Crt Unit

    25R-M100 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA450WEV0 PWB-B: DUNTK9510WEW2 MAIN UNIT (Continued) CRT UNIT TRANSISTORS RDA701 PRDAR0265PEFW R Heat Sink, for Q701 TLABN0101GJZZ X Label Q851 VS2SC3198-Y-1 J C3198-Y LX-BZ3049GEFD J Screw...

  • Page 25: Cabinet Parts

    – Front Cabinet — J1001 QJAKE0053GEZZ J Jack, Video-In GCOVA0108GJKA X R/C Cover J1003 QJAKE0055GEZZ J Jack, Audio-In HBDGB0103GJSB X "SHARP" Badge P1001 QPLGN0541CEZZ J Plug, 5-pin(HA) JBTN-0107GJKA X Button, Power, Vol-up/down AH JBTN-0108GJKA X Button, CH-up/down GCABB0108GJKA X Rear Cabinet...

  • Page 26: Packing Of The Set

    25R-M100 PACKING OF THE SET Polyethylene Bag Operation Manual Infrared R/C Unit Batteries Polyethylene Sheet Buffer Material FRONT Packing Case Use tape to fix the top side of packing case. REAR Bar Code Label Use 12 staples to fix the bottom side of packing case.
  • Page 27 25R-M100 COPYRIGHT © 2001 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.

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