Service manual

ManualsBrandsSharp ManualsTV26SL72

26SL72

29SL82

SHARP CORPORATION

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

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

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

» LOCATION OF USER'S CONTROL .....................................................................................................4

» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5

» SERVICE ADJUSTMENT .....................................................................................................................9

» CHASSIS LAYOUT .............................................................................................................................12

» BLOCK DIAGRAM ..............................................................................................................................14

» SCHEMATIC DIAGRAMS ...................................................................................................................16

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................35

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

» PACKING OF THE SET ......................................................................................................................51

CONTENTS

SPEAKER

SIZE ........................................................12 x 6 cm oval (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

POWER INPUT ......................................... AC110-220V, 50/60 Hz

POWER RATING .................................................................. 141W

PICTURE SIZE

26SL72 ...................................................... 2,032m

(315sq inch)

29SL82 ................................................. 2,193.5cm

(339sq 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

OUTPUT RATING .............. 5.0W + 5.0W (at 10% distortion and

Dual CH Operate)

Specifications are subject to change without

prior notice.

ELECTRICAL SPECIFICATIONS

SERVICE MANUAL

S81Y426SL72//

COLOR TELEVISION

Chassis No. MS-B

26SL72

29SL82

MODELS

Summary of content (45 pages)

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26SL72 29SL82 SERVICE MANUAL S81Y426SL72// COLOR TELEVISION Chassis No. MS-B MODELS 26SL72 29SL82 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 ......................................................................................................... 1 » IMPORTANT SERVICE SAFETY PRECAUTION ......................
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6SL72 29SL82 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 should be attempted. 2. Disconnect AC power before servicing. 3. Semiconductor heat sinks are potential shock hazards when the chassis is operating. 4.
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26SL72 29SL82 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, etc.) and measure the AC voltage drop across the resistor. AII checks must be repeated with the AC line cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the purpose of completing these check.) Any current measured must not exceed 0.
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26SL72 29SL82 LOCATION OF USER'S CONTROL Front Panel VIDEO/AUDIO IN2 TERMINALS POWER – POWER VOL + CH MENU VIDEO IN 2 L-AUDIO-R MTS STEREO POWER Press → On. Press again → Off. – VOL + POWER √ POWER CH √ MENU MENU Press → Accesses MAIN MENU. Press again → Exits MAIN MENU. SENSOR AREA FOR REMOTE CONTROL VOLUME UP/DOWN (+) Increases sound. (–) Decreases sound. CHANNEL UP/DOWN (') Selects next higher channel. (") Selects next lower channel.
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26SL72 29SL82 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 5.0A fuse (F5701), mounted on PWB-P, wired into one side of the AC line input.
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26SL72 29SL82 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.
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26SL72 29SL82 SERVICE NUMBER DATA ADJUSTMENT ITEM ADJUSTMENT CONTENTS INITIAL VALUE RANGE V01 V02 V03 V04 V05 V06 V07 V08 V09 V10 V11 V12 V13 V14 V15 V16 V17 V18 V19 V20 V21 V22 V23 V24 V25 V26 V27 V28 V29 V30 V31 V32 V33 V34 V35 V36 V37 V38 V39 V40 V41 V42 V43 V44 V45 V46 V47 V48 V49 V50 V51 V52 V53 PICTURE TINT COLOR SUB-COLOR BRIGHT R CUT-OFF G CUT-OFF B CUT-OFF G DRIVE B DRIVE SHARP N PHASE DC RESTORATION BLACK STRETCH ABL START POINT ABL GAIN γ POINT Y-MUTE/V-STOP ENERGY SAVE RTONE-G RTONE-B BTO
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26SL72 29SL82 SERVICE NUMBER DATA ADJUSTMENT ITEM ADJUSTMENT CONTENTS INITIAL VALUE RANGE D10 D11 D12 AFC GAIN V EHT H EHT 02 07 03 0-3(00h-03h) 0-7(00h-07h) 0-7(00h-07h) Must be set to "02" Must be set to "07" Must be set to "03" EX1 EX2 EX3 EX4 FAO VOLUME CC-POSITION INT A-ATT 24 21 7A 5A 0-50(00h-32h) 0-127(00h-7Fh) 0-255(00h-FFh) 0-127 Must be set to "24" OP1 OP2 OPTION1 OPTION2 BA 01 0-255(00h-FFh) 0-7(00h-07h) Must be set to "A4" Must be set to "03" M01 M02 M03 M04 M05 INPUT LEVE
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26SL72 29SL82 SERVICE ADJUSTMENT VCO Adjustment White Balance Adjustment 1. Connect a digital voltmeter between pin (55) of IC201 and ground. 2. Receive a good local channel. 3. Enter the service mode and select the service adjustment "R02". 4. Adjust T201 so that digital voltmeter reads 2.5±1.0VDC. 5. Adjustment is completed, remove the voltmeter, return to "normal" mode. 1. Receive a good local channel. 2.
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26SL72 29SL82 Vertical-Size and Linearity Adjustments Other Adjustments 1. Receive a good local channel. 2. Enter the service mode and select the service adjustment "D03" for V-size. 3. Adjust the "D03" bus data to get the proper V-size. 4. For V-linearity adjustment, select data bus "D05" and adjust to get the proper vertical linearity. Note: Aging for 10 min before adjustment. After the adjustment of V-center and V-size, readjustment for this V-line. 1. Enter the service mode. 2.
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26SL72 29SL82 Ë MTS ADJUSTMENT MTS Level Adjustment 1. Receive the following composite signal. Monaural signal: 400Hz, 100% modulation 2. Connect the rms voltmeter to pin (39) of IC3001. 3. Enter the service mode and select the service adjustment "M01" and set to "09". 4. Enter the service mode and select the service adjustment "EX4". 5. Adjust the data so that the rms voltmeter reads 490 ±10 mVrms. MTS VCO Adjustment 1. Keep the unit in no-signal state. 2.
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26SL72 29SL82 CHASSIS LAYOUT H G F E D C B A 1 2 3 12 4 5 6 7 8 9 10 11 13 12
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26SL72 29SL82 MODEL 26SL72 BLOCK DIAGRAM H G F E D C B A 1 2 3 4 14 5 6
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26SL72 29SL82 MODEL 29SL82 BLOCK DIAGRAM H G F E D C B A 1 2 3 4 15 5 6
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26SL72 29SL82 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: 1. The unit of resistance "ohm" is omitted. (K=kΩ=1000Ω, M=MΩ) 2.
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26SL72 29SL82 SCHEMATIC DIAGRAM: CONTROL Unit H G F E D C B A 1 2 3 4 17 5 6
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26SL72 29SL82 MODEL 26SL72 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 18 4 5 6 7 8 9 10 11 19 12
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26SL72 29SL82 MODEL 26SL72 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 20 4 5 6 7 8 9 10 11 21 12
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26SL72 29SL82 MODEL 29SL82 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 22 4 5 6 7 8 9 10 11 23 12
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26SL72 29SL82 MODEL 29SL82 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 24 4 5 6 7 8 9 10 11 25 12
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26SL72 29SL82 MODEL 26SL72 SCHEMATIC DIAGRAM: CRT Unit H G F E D C B A 1 2 3 4 26 5 6
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26SL72 29SL82 MODEL 29SL82 SCHEMATIC DIAGRAM: CRT Unit H G F E D C B A 1 2 3 4 27 5 6
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26SL72 29SL82 MODEL 26SL72 SCHEMATIC DIAGRAM: AV Unit H G F E D C B A 1 2 3 28 4 5 6 7 8 9 10 11 29 12
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26SL72 29SL82 MODEL 29SL82 SCHEMATIC DIAGRAM: AV Unit H G F E D C B A 1 2 3 30 4 5 6 7 8 9 10 11 31 12
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26SL72 29SL82 MODEL 26SL72 SCHEMATIC DIAGRAM: MULTI-POWER Unit H G F E D C B A 1 2 3 4 32 5 6
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SL72 29SL82 MODEL 29SL82 SCHEMATIC DIAGRAM: MULTI-POWER Unit H G F E D C B A 1 2 3 4 33 5 6
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26SL72 29SL82 SCHEMATIC DIAGRAM: MTS MODULE Unit H G F E D C B A 1 2 3 4 34 5 6
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26SL72 29SL82 PRINTED WIRING BOARD ASSEMBLIES H G F E PWB-B: CRT Unit (Wiring Side) D C B PWB-S: MTS MODULE Unit (Wiring Side) PWB-S: MTS MODULE Unit (Chip Parts Side) A 1 2 3 4 35 5 6
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26SL72 29SL82 H G F E D C B A PWB-A: MAIN Unit (Wiring Side) 1 2 3 4 36 5 6
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26SL72 29SL82 H G F E D C B A PWB-A: MAIN Unit (Chip Parts Side) 1 2 3 4 37 5 6
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26SL72 29SL82 H G F PWB-C: AV Unit (Wiring Side) E D C B A PWB-C: AV Unit (Chip Parts Side) 1 2 3 4 38 5 6
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26SL72 29SL82 H G F E D C B A PWB-F: CONTROL Unit (Wiring Side) 1 2 3 4 39 5 6
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26SL72 29SL82 H G F E D C B A PWB-P: MULTI-POWER Unit (Wiring Side) 1 2 3 4 40 5 6
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26SL72 29SL82 Ref. No. PARTS LIST ★ Part No. Description Code Ref. No. ★ Part No. Description Code PARTS REPLACEMENT PRINTED WIRING BOARD ASSEMBLIES 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.
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26SL72 29SL82 Ref. No. ★ Part No. Description Code Ref. No.
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26SL72 29SL82 Ref. No. Part No. ★ Description Code Ref. No.
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26SL72 29SL82 Ref. No. Part No. ★ Description Code Ref. No.
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26SL72 29SL82 Ref. No. Part No. ★ Description Code Ref. No.
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26SL72 29SL82 Ref. No. ★ Part No. Description Code Ref. No. PWB-A: DUNTKA526WEA3(26SL72) PWB-A: DUNTKA526WEA5(29SL82) MAIN UNIT (Continued) LX-HZ3007MEFD X Screw MSPRK0034BMFW J Spring ★ Part No.
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26SL72 29SL82 Ref. No. ★ Part No. Description Code Ref. No.
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26SL72 29SL82 Ref. No. ★ Part No. Description Code Ref. No. CONTROL UNIT DIODE [EL.··· Electrolytic] C4001 VCEA0A1CW476M J 47 16V AG D5702 VHD1SS119//-1 D5705 RH-DX0477CEZZ or RH-DX0259CEZZ å VA5701 RH-VX0048CEZZ EL.
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26SL72 29SL82 Ref. No. ★ Part No. Description Code Ref. No. PWB-S: DUNTKA070WEV3 INTEGRATED CIRCUIT å J CXA2074Q AY CAPACITORS C3001 C3002 C3003 C3004 C3005 C3006 C3007 C3008 C3009 C3010 C3011 C3012 C3013 C3014 C3015 C3016 C3017 C3018 [EL.··· Electrolytic] VCE9GA1HW475M J 4.7 50V VCKYCY1HB562K J 5600p 50V VCQYTA1HM123J J 0.012 50V VCEA0A1HW105M J 1.0 50V VCEA9A1HW475M J 4.7 50V VCEA0A1HW106M J 10 50V VCEA0A1HW475M J 4.7 50V VCKYCY1HF103Z J 0.01 50V VCEA0A1CW227M J 220 16V VCE9GA1HW475M J 4.
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26SL72 29SL82 Ref. No. ★ Part No. Description Code Ref. No. PACKING PARTS 26SL72 – – – – – Packing Case Polyethylene Sheet Buffer Material Polyethylene Bag Model Name Label – – – – – Packing Case Polyethylene Sheet Buffer Material Polyethylene Bag Model Name Label Code 26SL72 — — — — — 29SL82 SPAKC0010GJZZ SPAKP0106GJZZ SPAKX0005GJZZ SSAKA0101GJZZ TLABZ0141GJZZ Description CABINET PARTS (NOT REPLACEMANT ITEM) SPAKC0227GJZZ SPAKP0105GJZZ SPAKX0106GJZZ SSAKA0101GJZZ TLABZ0143GJZZ ★ Part No.
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26SL72 29SL82 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. ★ Bar Code Label REAR Use 12 staples to fix the bottom side of packing case. MARK ★ : Not replacement items.
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26SL72 29SL82 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. SHARP CORPORATION AV Systems Group Quality & Reliability Control Center Yaita, Tochigi 329-2193, Japan TQ1208-S Sep. 2001 Printed in Japan D SEM P SEMEX MI.