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Sharp 26SL71 Service Manual
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Sharp 26SL71 Service Manual

Sharp 26SL71 Service Manual

Chassis no. sn-91a
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PUSH OPEN
POWER
POWER
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.
This Service Manual covers the modifications from Models 26SL70 and 29SL80. For data and information
not discussed here, please refer to the 26SL70/29SL80 Service Manual (S69J129SL80//).

SERVICE MANUAL

MTS STEREO
MODELS
OUTLINE

SHARP CORPORATION

1
COLOR TELEVISION
Chassis No. SN-91A
26SL71
29SL81
26SL71
29SL81
S60B526SL71//

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Summary of Contents for Sharp 26SL71

  • Page 1: Service Manual

    26SL71 29SL81 SERVICE MANUAL S60B526SL71// COLOR TELEVISION Chassis No. SN-91A 26SL71 PUSH OPEN POWER POWER MTS STEREO 29SL81 MODELS 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: List Of Changed Parts

    26SL71 29SL81 LIST OF CHANGED PARTS Ref. No. Description Current (26SL70) New (26SL71) Note PRINTED WIRING BOARD ASSEMBLIES PWB-A Main Unit DUNTK9806WEV1 DUNTKA270WEV0 MAIN UNIT IC751 I.C. VHiKA7809Pi-1 VHiKA7809AP-1 or VHiKA7809Pi-1 IC2001 I.C. RH-iX3256CEZZ RH-iX3366CEZZ IC2101 I.C. VHiM24C01B/-1 VHiBR24C02/-1 L2040...
  • Page 3 26SL71 29SL81 LIST OF CHANGED PARTS Ref. No. Description Current (29SL80) New (29SL81) Note PICTURE TUBE DY601 Deflection Yoke RCiLH0119MEZZ RCiLH0104GJZZ PRINTED WIRING BOARD ASSEMBLIES PWB-A MAIN Unit DUNTK9806WEV2 DUNTKA270WEV1 MAIN UNIT IC751 I.C. VHiKA7809Pi-1 VHiKA7809AP-1 or VHiKA7809Pi-1 IC2001 I.C.
  • Page 4 26SL71 29SL81 MODEL 26SL71 SCHEMATIC DIAGRAM:MAIN-1 Unit 7001GEFW...
  • Page 5 26SL71 29SL81 MODEL 26SL71 SCHEMATIC DIAGRAM:MAIN-2 Unit...
  • Page 6 26SL71 29SL81 MODEL 29SL81 SCHEMATIC DIAGRAM:MAIN-1 Unit 7001GEFW...
  • Page 7 26SL71 29SL81 MODEL 29SL81 SCHEMATIC DIAGRAM:MAIN-2 Unit...
  • Page 8 26SL71 29SL81 SCHEMATIC DIAGRAM: POWER Unit...

  • Page 9: Printed Wiring Board Assemblies

    26SL71 29SL81 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 10 26SL71 29SL81 PWB-A: MAIN Unit (Component Side)

  • Page 11: Parts List

    çå DY601 RCiLH0104GJZZ X Deflection Yoke (29SL81) PRINTED WIRING BOARD ASSEMBLIES CABINET PARTS (NOT REPLACEMENT ITEM) PWB-A DUNTKA270WEV0 – MAIN Unit (26SL71) — 26SL71 PWB-A DUNTKA270WEV1 – MAIN Unit (29SL81) — CCABA0008WEH3 X Front Cabinet Ass'y JBTN-0106GJSB X Button, Power...
  • Page 12 26SL71 29SL81 COPYRIGHT © 2000 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.

  • Page 13: Table Of Contents

    Picture IF Carrier Frequency ........45.75 MHz UHF-Channels ............14 thru 69 Sound IF Carrier Frequency ........41.25 MHz CATV Channels ............1 thru 125 Color Sub-Carrier Frequency ........42.17 MHz (Nominal) Specifications are subject to change without prior notice. SHARP CORPORATION...

  • Page 14: Important Service Safety Precaution

    26SL40, 26SL70 29SL80 IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are throughly 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 15: Safety Notice

    26SL40, 26SL70 29SL80 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 16: Location Of User's Control

    26SL40, 26SL70 29SL80 LOCATION OF USER'S CONTROL Front Panel VIDEO/AUDIO IN 2 TERMINALS (VIDEO/AUDIO terminals are also provided on the rear.) – VOL + MENU VIDEO IN 2 L-AUDIO-R POWER POWER MTS STEREO POWER Press → On. Press again → Off. –...

  • Page 17: Installation And Service Instructions

    26SL40, 26SL70 29SL80 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 High voltage is not adjustable but must be checked The receiver is protected by a 5.0A fuse...
  • Page 18 26SL40, 26SL70 29SL80 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.
  • Page 19 26SL40, 26SL70 29SL80 DATA SERVICE ADJUSTMENT ITEM ADJUSTMENT CONTENTS NUMBER RANGE INITIAL VALUE PICTURE 00-7F TINT 00-7F COLOR 00-7F BRIGHTNESS 00-7F SHARPNESS 28/24 00-3F Must be set to "28"(26SL40/70)/"24"(29SL80) VERTICAL PHASE 00-07 Must be set to "00" HORIZONTAL PHASE 00-1F RF-AGC 00-3F VERTICAL AMP...

  • Page 20: Service Adjustment

    26SL40, 26SL70 29SL80 SERVICE ADJUSTMENT VCO Adjustment White Balance Adjustment 1. Connect a digital voltmeter between pin (44) of IC201 1. Receive a good local channel. and ground. 2. Enter the service mode and select the service 2. Receive a good local channel. adjustment "S03"...
  • Page 21 26SL40, 26SL70 29SL80 Sub-Brightness Adjustment 3.58MHz Trap Adjustment 1. Receive a good local channel. 1. Receive a good local channel. 2. Make sure the customer brightness control is set to 2. Enter the service mode and select the service center position. adjustment "S16".

  • Page 22: Mts Adjustment

    26SL40, 26SL70 29SL80 MTS ADJUSTMENT (Only for Models 26SL70, 29SL80) MTS Level Adjustment 1. Feed the following monaural signal to pin (14) of IC3001. Monaural signal : 300 Hz, 245 mVrms 2. Connect the rms voltmeter to pin (39) of IC3001. 3.

  • Page 23: Chassis Layout

    26SL40, 26SL70 29SL80 CHASSIS LAYOUT...

  • Page 24: Block Diagram

    26SL40, 26SL70 29SL80 MODEL 26SL40 BLOCK DIAGRAM...
  • Page 25 26SL40, 26SL70 29SL80 MODEL 26SL70 BLOCK DIAGRAM...
  • Page 26 26SL40, 26SL70 29SL80 MODEL 29SL80 BLOCK DIAGRAM...

  • Page 27: Schematic Diagrams

    26SL40, 26SL70 29SL80 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 28 26SL40, 26SL70 29SL80 MODEL 26SL40 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 29 26SL40, 26SL70 29SL80 7001GEFW...
  • Page 30 26SL40, 26SL70 29SL80 MODEL 26SL40 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 31 26SL40, 26SL70 29SL80...
  • Page 32 26SL40, 26SL70 29SL80 MODEL 26SL70 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 33 26SL40, 26SL70 29SL80 7001GEFW...
  • Page 34 26SL40, 26SL70 29SL80 MODEL 26SL70 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 35 26SL40, 26SL70 29SL80...
  • Page 36 26SL40, 26SL70 29SL80 MODEL 29SL80 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 37 26SL40, 26SL70 29SL80 7001GEFW...
  • Page 38 26SL40, 26SL70 29SL80 MODEL 29SL80 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 39 26SL40, 26SL70 29SL80...
  • Page 40 26SL40, 26SL70 29SL80 SCHEMATIC DIAGRAM: CRT Unit A63AFW32X (26SL40/70) A68KRQ58X (29SL80)
  • Page 41 26SL40, 26SL70 29SL80 SCHEMATIC DIAGRAM: FRONT AV Unit MODEL 26SL40 MODELS 26SL70, 29SL80...
  • Page 42 26SL40, 26SL70 29SL80 MODEL 26SL40 SCHEMATIC DIAGRAM: POWER Unit...
  • Page 43 26SL40, 26SL70 29SL80 MODEL 26SL70, 29SL80 SCHEMATIC DIAGRAM: POWER Unit...
  • Page 44 26SL40, 26SL70 29SL80 MODEL 29SL80 SCHEMATIC DIAGRAM: Y/C Unit...

  • Page 45: Printed Wiring Board Assemblies

    26SL40, 26SL70 29SL80 PRINTED WIRING BOARD ASSEMBLIES PWB-P: POWER Unit (Wiring Side)
  • Page 46 26SL40, 26SL70 29SL80 PWB-A: MAIN Unit (Wiring Side)
  • Page 47 26SL40, 26SL70 29SL80 PWB-A: MAIN Unit (Chip Parts Side)
  • Page 48 26SL40, 26SL70 29SL80 PWB-B: CRT Unit (Wiring Side) PWB-K: Y/C Unit (Wiring Side) (only for 29SL80) PWB-K: Y/C Unit (Chip Parts Side) PWB-F: Front AV Unit (Wiring Side) (only for 29SL80)

  • Page 49: Replacement Parts List

    26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PARTS LIST PWB-A: DUNTK9806WEV0 (26SL40) PWB-A: DUNTK9806WEV1 (26SL70) PARTS REPLACEMENT PWB-A: DUNTK9806WEV2 (29SL80) Replacement parts which have these special safety characteristics MAIN UNIT identified in this manual; electrical components having such features å...
  • Page 50 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTK9806WEV0 (26SL40) CAPACITORS PWB-A: DUNTK9806WEV1 (26SL70) [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film] PWB-A: DUNTK9806WEV2 (29SL80) VCEA0A1CW476M J 47 MAIN UNIT (Continued) VCEA0A1HW105M J 1.0 VCEA0A1HW475M J 4.7 D402 RH-EX0601GEZZ J Zener Diode, 3.6V (29SL80) AA...
  • Page 51 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTK9806WEV0 (26SL40) C954 VCKYCY1HF103Z J 0.01 Ceramic PWB-A: DUNTK9806WEV1 (26SL70) (26SL70, 29SL80) PWB-A: DUNTK9806WEV2 (29SL80) C955 VCEA0A1CW106M J 10 (26SL70, 29SL80) MAIN UNIT (Continued) C956 VCEA0A1CW106M J 10 EL.
  • Page 52 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTK9806WEV0 (26SL40) R401 VRS-CY1JF682J J 6.8k 1/16W M-Ox. PWB-A: DUNTK9806WEV1 (26SL70) R402 VRS-CY1JF331J J 330 1/16W M-Ox. PWB-A: DUNTK9806WEV2 (29SL80) R403 VRS-CY1JF391J J 390 1/16W M-Ox. R404 VRD-RA2BE102J J 1.0k 1/8W...
  • Page 53 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTK9806WEV0 (26SL40) R910 VRD-RA2BE102J J 1.0k 1/8W Carbon PWB-A: DUNTK9806WEV1 (26SL70) (26SL70, 29SL80) PWB-A: DUNTK9806WEV2 (29SL80) R911 VRS-CY1JF683J J 68k 1/16W M-Ox. (26SL70, 29SL80) MAIN UNIT (Continued) R912 VRS-CY1JF223J...
  • Page 54 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTK9806WEV0 (26SL40) P651 QPLGN0361CEZZ J Plug, 3-pin PWB-A: DUNTK9806WEV1 (26SL70) P702 QPLGN0361CEZZ J Plug, 3-pin (BB) PWB-A: DUNTK9806WEV2 (29SL80) P704 QPLGN0304CEZZ J Plug, 3-pin (PC) P901 QPLGN0861CEZZ J Plug, 8-pin (FA) (26SL40) MAIN UNIT (Continued)

  • Page 55: Crt Unit

    26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-F: DUNTK9831WEV0 (26SL40) PWB-B: DUNTK9510WEV0 PWB-F: DUNTK9831WEV1 (26SL70, 29SL80) CRT UNIT FRONT AV UNIT TRANSISTORS DIODE Q851 VS2SC3198-Y-1 J 2SC3198(Y) D4001 RH-PX0383CEZZ X LED, Power Ind. Q852 VS2SC3789//2E J 2SC3789...
  • Page 56 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1407 VRS-CY1JF103J J 10k 1/16W M-Ox. PWB-K: DUNTK9832WEV0 (29SL80) R1408 VRS-CY1JF821J J 820 1/16W M-Ox. Y/C UNIT R1409 VRS-CY1JF101J J 10 1/16W M-Ox. R1410 VRS-CY1JF681J J 680 1/16W M-Ox.
  • Page 57 26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-P: DUNTK9830WEV0 (26SL40) C5704 RC-QZA104TAYK J 0.1 Mylar PWB-P: DUNTK9830WEV2 (26SL70, 29SL80) C5707 RC-KZ0311CEZZ J 3300p AC250V Ceramic å C5708 RC-KZ0029CEZZ J 0.01 AC250V Ceramic POWER UNIT C5709 RC-KZ0029CEZZ J 0.01...

  • Page 58: Miscellaneous Parts

    Not Available – Front Cabinet — QCNW-0107GJZZ X Connecting Cord GCOVA0106GJSA X Cover for R/C QCNW-0108GJZZ X Connecting Cord HBDGB3141CESA X Badge, "SHARP" QCNW-0109GJZZ X Connecting Cord JBTN-0106GJSA X Button, Power (26SL40, 26SL70) MSPRC0005PEFW R Spring for Power Button VSP1206PB378E X Speaker 8 ohm (L)

  • Page 59: Packing Of The Set

    26SL40, 26SL70 29SL80 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKING OF THE SET Polyethylene Bag Operation Manual Registration Card Infrared R/C Unit Batteries Wrapping Paper Buffer Material FRONT Packing Case The packing case top is tape-sealed. REAR Use 12 staples to fix the bottom side...

  • Page 60: 26Sl40, 26Sl70

    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.

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29sl81

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