Sharp 26SL40 Service Manual
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Sharp 26SL40 Service Manual

Sharp 26SL40 Service Manual

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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.
» 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 ................................................................................................................... 15
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 33
» REPLACEMENT PARTS LIST ............................................................................................................ 37
» PACKING OF THE SET ...................................................................................................................... 47
POWER INPUT ........................................ 110-220 V AC 50/60 Hz
POWER RATING
26SL40 .............................................................................. 120 W
26SL70 .............................................................................. 125 W
29SL80 .............................................................................. 130 W
PICTURE SIZE
26SL40, 26SL70 ................................... 2,032 cm
29SL80 .................................................. 2,193 cm
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
SERVICE MANUAL
MTS STEREO
MODELS
CONTENTS

ELECTRICAL SPECIFICATIONS

2
(315 sq inch)
2
(340 sq inch)
(Nominal)
SHARP CORPORATION
1
COLOR TELEVISION
Chassis No. SN-91A
26SL40, 26SL70
29SL80
AUDIO POWER
OUTPUT RATING
26SL40 ............................................................. 2.5 W + 2.5 W
26SL70, 29SL80 ..................................................... 5 W + 5 W
(at 5% distortion and Dual CH Operate)
SPEAKER
SIZE ............................................................... 12 × 6 cm (2 pcs.)
VOICE COIL IMPEDANCE ............................... 8 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
Specifications are subject to change without
prior notice.
26SL40, 26SL70
29SL80
S69J129SL80//
Page

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  • Page 1: Table Of Contents

    AUDIO POWER POWER RATING OUTPUT RATING 26SL40 ................120 W 26SL40 ............. 2.5 W + 2.5 W 26SL70 ................125 W 26SL70, 29SL80 ............. 5 W + 5 W 29SL80 ................130 W (at 5% distortion and Dual CH Operate)

  • Page 2: 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 3 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...

  • Page 4: 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 5: Installation And Service Instructions

    1. Apply 110-220V AC using a variac transformer for 4. The voltage should be approximately, 28.7kV accurate input voltage. (26SL40/70)/29.7kV(29SL80)(at zero beam). 2. Allow for warm up and adjust all customer controls If a correct reading cannot be obtained, check circuitry for normal picture and sound.
  • Page 6 The service adjustment number will vary in increments of one, from "S01" to "OP"(26SL40)/ "M05"(26SL70, 29SL80). Select the item you wish to adjust. 3. Data number selection Press the Vol-up or down button to adjust the data number.
  • Page 7 00-03 Must be set to "02" TUNER SETUP 00, 01 Must be set to "00" OPTION (Set to each model) 02/36 00-FF Must be set to "02"=26SL40, "36"=26SL70, 29SL80 INPUT LEVEL 00-0F ST VCO 00-3F FILTER 00-3F WIDE BAND 00-3F...
  • Page 8 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.
  • Page 9 3. This is a two position adjustment, "00" is ON, "01" is adjustment "S04". OFF. 4. Adjust "S04" data value to obtain normal brightness 4. Adjust data value to "00"(26SL40/70)/"01"(29SL80) level. for normal viewing. Vertical-Size Adjustment Sharpness and Audio Balance Adjust- ments 1.
  • Page 10 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.

  • Page 11: Chassis Layout

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

  • Page 12: Block Diagram

    26SL40, 26SL70 29SL80 MODEL 26SL40 BLOCK DIAGRAM...
  • Page 13 26SL40, 26SL70 29SL80 MODEL 26SL70 BLOCK DIAGRAM...
  • Page 14 26SL40, 26SL70 29SL80 MODEL 29SL80 BLOCK DIAGRAM...

  • Page 15: 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 16 26SL40, 26SL70 29SL80 MODEL 26SL40 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 17 26SL40, 26SL70 29SL80 7001GEFW...
  • Page 18 26SL40, 26SL70 29SL80 MODEL 26SL40 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 19 26SL40, 26SL70 29SL80...
  • Page 20 26SL40, 26SL70 29SL80 MODEL 26SL70 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 21 26SL40, 26SL70 29SL80 7001GEFW...
  • Page 22 26SL40, 26SL70 29SL80 MODEL 26SL70 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 23 26SL40, 26SL70 29SL80...
  • Page 24 26SL40, 26SL70 29SL80 MODEL 29SL80 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 25 26SL40, 26SL70 29SL80 7001GEFW...
  • Page 26 26SL40, 26SL70 29SL80 MODEL 29SL80 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 27 26SL40, 26SL70 29SL80...
  • Page 28 26SL40, 26SL70 29SL80 SCHEMATIC DIAGRAM: CRT Unit A63AFW32X (26SL40/70) A68KRQ58X (29SL80)
  • Page 29 26SL40, 26SL70 29SL80 SCHEMATIC DIAGRAM: FRONT AV Unit MODEL 26SL40 MODELS 26SL70, 29SL80...
  • Page 30 26SL40, 26SL70 29SL80 MODEL 26SL40 SCHEMATIC DIAGRAM: POWER Unit...
  • Page 31 26SL40, 26SL70 29SL80 MODEL 26SL70, 29SL80 SCHEMATIC DIAGRAM: POWER Unit...
  • Page 32 26SL40, 26SL70 29SL80 MODEL 29SL80 SCHEMATIC DIAGRAM: Y/C Unit...

  • Page 33: Printed Wiring Board Assemblies

    26SL40, 26SL70 29SL80 PRINTED WIRING BOARD ASSEMBLIES PWB-P: POWER Unit (Wiring Side)
  • Page 34 26SL40, 26SL70 29SL80 PWB-A: MAIN Unit (Wiring Side)
  • Page 35 26SL40, 26SL70 29SL80 PWB-A: MAIN Unit (Chip Parts Side)
  • Page 36 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 37: Replacement Parts List

    VS2SA1037KQ-1 J 2SA1037 (26SL40, 26SL70) QEARC2702MEZZ M Grounding Part VS2SB709AR/-1 (29SL80) Q403 VS2SC2412KQ-1 J 2SC2412 Q421 VS2SA1037KQ-1 J 2SA1037 (26SL40, 26SL70) AA VS2SB709AR/-1 Q451 VS2SA1037KQ-1 J 2SA1037 PRINTED WIRING BOARD ASSEMBLIES VS2SB709AR/-1 (NOT REPLACEMENT ITEM) Q601 VS2SC2482//-1 J 2SC2482 å...
  • Page 38 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 39 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)
  • Page 40 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.
  • Page 41 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)
  • Page 42 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) P901 QPLGN0561CEZZ J Plug, 5-pin (FA) R2046 VRD-RA2BE101J J 100 1/8W Carbon...
  • Page 43 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.
  • Page 44 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 45 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...

  • Page 46: 26Sl40, 26Sl70

    PKAi-0002PE00 X Door Latch HiNDP0102GJZZ X Indication Plate (26SL40) HiNDP0001GJZZ X Indication Plate (26SL70) GCABB0009GJKA J Rear Cabinet (26SL40) GCABB0008GJKA X Rear Cabinet (26SL70) SUPPLIED ACCESORRIES 29SL80 CCABA0007WEH0 X Front Cabinet Ass’y Not Available – Front Cabinet — RRMCG1339CESAM Infrared R/C Unit...

  • Page 47: 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.
  • Page 48 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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