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28LW-92E

SERVICE MANUAL

This document has been published to
 be used for after sales service only.

   AK- 45

 CHASSIS

In the interests of user safety (required by safety
regulations in some countries) the set should be re-
stored to its original condition and only parts identi-
cal to those specified should be used.

CONTENTS

ELECTRICAL SPECIFICATIONS ........................................................................................ 3
IMPORTANT SERVICING NOTES ...................................................................................... 4
CONTROLS & TERMINALS ................................................................................................ 5
PRINTED WIRING BOARD LAYOUT ................................................................................. 7
PARTS LISTING ................................................................................................................... 8
HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 11

SHARP  CORPORATION

 PAL 

B/G, I

 / SECAM 

L/L’, B/G, D/K  

SYSTEM COLOUR TELEVISION

     MODEL

 28LW-92E

ES

SE

0028

LW92E00

              

  Issued: 22

nd

 Jan. 2004

In  order  to   service the model 28LW-92E ,  refer  to
the AK-45 Chassis Service Manual
(SE

00

AK45CHA00).

Summary of Contents for 28LW-92E

Page 1: ...nd only parts identi cal to those specified should be used CONTENTS ELECTRICAL SPECIFICATIONS 3 IMPORTANT SERVICING NOTES 4 CONTROLS TERMINALS 5 PRINTED WIRING BOARD LAYOUT 7 PARTS LISTING 8 HOW TO UPDATE THE TECHNICAL INFORMATION 11 SHARP CORPORATION PAL B G I SECAM L L B G D K SYSTEM COLOUR TELEVISION MODEL 28LW 92EES SE0028LW92E00 Issued 22nd Jan 2004 In order to service the model 28LW 92E refe...

Page 2: ...f only part number changes are required just change part number directly the part number in the Parts Listing Section If you need more information please refer to the Technical Report Bulletin SERVICE MANUAL UPDATE LOG SHEET Part No Technical Report No Technical Bulletin No Cause Solution Page No Application Data Serial No ...

Page 3: ...C 1 2 DE 0 8 FGHJ 1 6 KLMN 1 4 F G H J 1 4 STUV 1 2 mm Picture Intermediate frequency L 33 9MHz L B G D K I 38 9MHz Sound Carrier Trap L 40 4MHz L D K 32 4MHz B G 33 4MHz I 32 9MHz Adjacent Sound Carrier Trap L 32 4MHz L D K B G 40 4MHz I 40 9MHz Adjacent Picture Carrier Trap L 41 9MHz L D K I 30 9MHz B G 31 9MHz Aerial Input Impedance VHF UHF 75 ohm Unbalanced Tuning Ranges 45 75MHz thru 855 25 M...

Page 4: ...dous x ray radiation levels This is a problem when in close proximity to the receiver for long periods of time To reduce any risks associated with this please observe the following precautions 1 When undertaking any servicing on this chassis DO NOT increase the EHT to more than 31 KV at a instantaneous beam current of 1000 µA 2 Ensure that during normal operation the EHT does not exceed 28 KV at a...

Page 5: ... 9 6 5 5217 9 17 7 7 REAR PANEL 9 Speakers left right Power On Off Volume P CH Program MENU Menu AUDIO L Audio left AUDIO R Audio right VIDEO VCR Headphone 3 6 mm Ø ANT Antenna 75 W EXT 1 Scart Socket 1 with RGB EXT 2 Scart Socket 2 with SVHS Power Cable ...

Page 6: ... mode button P CH Program Volume TV Quit Menu 7 EXT button EXT 1 RGB EXT 2 EXT 2S F AV Yellow Feature Menu Blue Installation Menu Hold Update Index Page Reveal Expand Mix Teletext Time Red Sound Menu Green Picture Menu Mute I II Mono Stereo Dual I II Volume P CH Program Flash back button M Menu Cursor Down Cursor Left ...

Page 7: ...7 28LW 92E CHASSIS LAYOUT Mother Unit CRT Unit Control Panel Unit Remote Control Unit ...

Page 8: ...0A AD AA D111 30001318 DIODE BA159 1A 800V 20A AB AA D118 30009366 DIODE UF5402 3A 200V 150A AF AB D119 30009366 DIODE UF5402 3A 200V 150A AF AB D121 20092405 CN ASY 37 DIODE UF5407 FERRITE BAR 5 8 AE AB D127 30001315 DIODE BYD33D 1A 200V 20A AE AA D130 30001329 DIODE 1N4007 1A 1000V 30A AB AA D131 30001318 DIODE BA159 1A 800V 20A AB AA D133 30003722 DIODE ZENER ZPD15V AA AA D2 30001371 DIODE ZENE...

Page 9: ...UF 50V M AB AA C708 30000407 CAP EL 470UF 16V M AC AA C717 30000092 CAP MKT 220NF 63V J AD AA C718 30000092 CAP MKT 220NF 63V J AD AA REF No PARTS DESCRIPTION SN CODE EX CODE L500 30001992 FIXED COIL 10UH Q65 K A AB AA L501 30001992 FIXED COIL 10UH Q65 K A AB AA L502 30001992 FIXED COIL 10UH Q65 K A AB AA L503 30001992 FIXED COIL 10UH Q65 K A AB AA L504 30001992 FIXED COIL 10UH Q65 K A AB AA L505 ...

Page 10: ...18085 CAP VAR SAFE 510V K MFCN14D512 AD AA R206 30000459 RES CF 1 4W 100R J AB AA R207 30000459 RES CF 1 4W 100R J AB AA REF No PARTS DESCRIPTION SN CODE EX CODE R219 30000792 RES CF 1 4W 75R J AB AA R221 30000792 RES CF 1 4W 75R J AB AA R231 30000792 RES CF 1 4W 75R J AB AA R235 30000655 RES CF 1 4W 330R J AB AA R247 30000500 RES CF 1 4W 12K J AB AA R265 30000459 RES CF 1 4W 100R J AB AA R266 300...

Page 11: ... SW AH AC A A 30009848 CABL 1P 240 SIS AB AA B B 30009834 CABL 1P 60 SIS AB AA J344 30001996 FIXED COIL 22UH Q40 K AB AA MD101 30001669 PREAMPLIFIER TFMS1380 AM AD S224 30000452 RES CF 1 4W 10R J AB AA SG901 30000428 SPARK GAP 300V AG AB SG902 30000428 SPARK GAP 300V AG AB SG903 30000428 SPARK GAP 300V AG AB SG904 30000428 SPARK GAP 300V AG AB SG905 30021532 SPARK GAP 1500V AG AC TH101 30001268 TH...

Page 12: ...cal photocopying recording or otherwise without prior written permission of the publisher Technical information and Production Vestel Electronik AS Technical information re issued SHARP ELECTRONICA ESPAÑA S A Service Manual Group Engineering Dept Polígono Industrial Can Sant Joan 08190 Sant Cugat del Vallès Barcelona Spain Think Ecology please use RECYCLED PAPER ...

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