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21LF-90RU

SERVICE MANUAL

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

   AK- 44

 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.

SHARP  CORPORATION

CONTENTS

ELECTRICAL SPECIFICATIONS ........................................................................................ 3
IMPORTANT SERVICING NOTES ...................................................................................... 4
CONTROLS & TERMINALS ................................................................................................ 5
PRINTED WIRING BOARD LAYOUT ................................................................................. 6
PARTS LISTING ................................................................................................................... 7
HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 11

     MODEL

 21LF-90RU

SE

0021

LF90R00

              

  Issued:2

2

nd

 April 2005

 PAL 

B/G

 / SECAM 

L/L’, B/G, D/K  

SYSTEM COLOUR TELEVISION

In  order  to   service the model 21LF-90RU,  refer  to
the AK-44 Chassis Service Manual
(SE

00

AK44CHA00).

Summary of Contents for 21LF-90RU

Page 1: ...nd only parts identi cal to those specified should be used SHARP CORPORATION CONTENTS ELECTRICAL SPECIFICATIONS 3 IMPORTANT SERVICING NOTES 4 CONTROLS TERMINALS 5 PRINTED WIRING BOARD LAYOUT 6 PARTS LISTING 7 HOW TO UPDATE THE TECHNICAL INFORMATION 11 MODEL 21LF 90RU SE0021LF90R00 Issued 22nd April 2005 PAL B G SECAM L L B G D K SYSTEM COLOUR TELEVISION In order to service the model 21LF 90RU refe...

Page 2: ...If 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: ...ture Carrier Trap L 41 9MHz L D K 30 9MHz B G 31 9MHz Aerial Input Impedance VHF UHF 75 ohm Unbalanced Tuning Ranges 48 25MHz thru 855 25 MHz VHF S1 S41 CH Hyperband E2 E12 F2 F10 UHF E21 E69 Power Input 220V 240 Volts AC 50 Hz Power Consumption Normal Operation Method IEC60107 62 W Stand by Operation 3 W Audio Power Output Rating MPO Impedance Internal Left Speaker 4 W 16 Ω Internal Right Speaker...

Page 4: ...us 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 30 0 KV at a instantaneous beam current of 1300 µA 2 Ensure that during normal operation the EHT does not exceed 25 55 KV a...

Page 5: ...AV RGB 13 Yellow Feature Menu 14 Blue Installation Menu 15 Hold 16 Update 17 Index Page 18 Reveal 19 Expand 20 Mix 21 Teletext 22 Time 23 Red Sound Menu 24 Green Picture Menu 25 Mute 26 I II Mono Stereo Dual I II 27 Volume 28 P CH Program 29 Flash back button 30 M Menu 31 Cursor Down 32 Cursor Left CH MENU Speakers left right Power On Off Volume CH Program MENU Menu VIDEO VCR AUDIO L Audio left AU...

Page 6: ...6 21LF 90RU CHASSIS LAYOUT Mother Unit CRT Unit Headphone Unit ...

Page 7: ... LOAD CAP AB AG X403 30000074 CAP MKT 100NF 63V J AA AC X501 30002851 XTAL 4 000 30p HC49U AC AH X700 30001756 XTAL 18 432 12p HC49U AE AP COILS L1001 30001996 FIXED COIL 22UH Q40 K AA AB L1002 30001996 FIXED COIL 22UH Q40 K AA AB L101 30013412 FERRITE SMD 1 5K 100MHz 500 mA 0805 AA AA REF No PARTS DESCRIPTION SN CODE EX CODE 30017634 21 CRT TUBE SAFE EW FREE REALFLA BW CQ 30028644 21DEGCOIL EARTH...

Page 8: ...UF 50V M AA AB C424 30000345 CAP EL 10UF 50V M AA AB C425 30012586 CAP SMD 22NF 50V K 0603 AA AB REF No PARTS DESCRIPTION SN CODE EX CODE C426 30016654 CAP SMD 100NF 16V K R 0603 AA AB C427 30016654 CAP SMD 100NF 16V K R 0603 AA AB C429 30012589 CAP SMD 4 7NF 50V K 0603 AA AB C431 30000362 CAP EL 1UF 50V M AA AB C432 30012586 CAP SMD 22NF 50V K 0603 AA AB C433 30000345 CAP EL 10UF 50V M AA AB C434...

Page 9: ...A AB R1001 30000492 RES CF 1 4W 120R J AA AA REF No PARTS DESCRIPTION SN CODE EX CODE R1002 30000492 RES CF 1 4W 120R J AA AA R101 30000489 RES SMD 1 10W 1R J 0805 AA AB R103 30012509 RES SMD 1 16W 100K J 0603 AA AB R105 30000792 RES CF 1 4W 75R J AA AB R109 30012713 RES SMD 1 16W 75R J 0603 AA AB R110 30012713 RES SMD 1 16W 75R J 0603 AA AB R113 30012713 RES SMD 1 16W 75R J 0603 AA AB R114 300127...

Page 10: ...4 30007779 RES MO 5W 47R J RADIAL AA AC R665 30012708 RES SMD 1 16W 68K J 0603 AA AA R666 30001077 RES MO 2W 10R J AA AC R667 30012659 RES SMD 1 16W 2 2K J 0603 AA AB REF No PARTS DESCRIPTION SN CODE EX CODE R668 30012641 RES SMD 1 16W 10K J 0603 AA AB R669 30012659 RES SMD 1 16W 2 2K J 0603 AA AB R701 30000459 RES CF 1 4W 100R J AA AB R703 30000459 RES CF 1 4W 100R J AA AB R705 30000459 RES CF 1 ...

Page 11: ... HEADER 2P 2 5MM TOP BLACK AA AA PL405 30006709 CONN HEADER 5P 2 5MM TOP WHT SD AA AB PL407 30001836 CONN HEADER 3P 2 5MM TOP BLACK SD AA AB PL501 30001783 CONN HEADER 5P 2 5MM TOP BD AA AC PL503 30009085 CNAS 1P 350 DIS W CLIPS AA AC PL504 30019101 CABL 1P 350 DIS UL1672AWG22 AA AB PL601 30001827 CONN HEADER 4P 5 7 5MM TOP WHT AA AD PL602 30006660 CONN HEADER 4P 2 5MM TOP WHT SD AA AB PL801 30001...

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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