Table of Contents
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PAL
/ SECAM
B/G
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
SHARP CORPORATION
SERVICE MANUAL
SYSTEM COLOUR TELEVISION
L/L', B/G, D/K
21LF-90RU
MODEL
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.
In order to service the model 21LF-90RU, refer to
the
AK-44
(SE00AK44CHA00).
CONTENTS
1
Issued:22
AK- 44
CHASSIS
Chassis
Service
This document has been published to
be used for after sales service only.
21LF-90RU
SE0021LF90R00
April 2005
nd
Manual
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Summary of Contents for Sharp 21LF-90RU
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Page 1: Table Of Contents
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. In order to service the model 21LF-90RU, refer to AK-44 Chassis Service Manual (SE00AK44CHA00). - Page 2 21LF-90RU SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Application Cause / Solution Part No. Page No. Data /Serial No. Technical Bulletin No. Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section.
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Page 3: Electrical Specifications
21LF-90RU ELECTRICAL SPECIFICATIONS •Picture Intermediate frequency •Power Input ....220V-240 Volts AC 50 Hz L’ ..........33.9MHz L, B/G, D/K ......38.9MHz •Power Consumption •Sound Carrier Trap Normal Operation (Method IEC60107) ....62 W L’ ..........40.4MHz Stand-by Operation .......... < 3 W L, D/K ......... -
Page 4: Important Servicing Notes
21LF-90RU IMPORTANT SERVICING NOTES Only qualified service personnel are allowed to carry out maintenance and repair of this receiver. Servicing of High Voltage System and CRT It is important that the static charge is removed from the high voltage system when carrying out work on the receiver. -
Page 5: Controls & Terminals
21LF-90RU CONTROLS & TERMINALS Speakers (left + right) = Power On / Off = Volume -/+ = Program -/+ MENU = Menu VIDEO = VCR AUDIO L = Audio left AUDIO R = Audio right MENU = Headphone 3,6 mm Ø... -
Page 6: Printed Wiring Board Layout
21LF-90RU CHASSIS LAYOUT Mother Unit Headphone Unit CRT Unit... -
Page 7: Parts Listing
PICTURE TUBE D602 30001329 DIODE 1N4007 1A/1000V 30A 30017634 21" CRT TUBE SAFE EW FREE REALFLA D603 30001285 DIODE 1N4148 SMD 30028644 21DEGCOIL&EARTH SAFE CB.WO/UL FLAT SHARP D608 30001318 DIODE BA159 1A/800V 20A TUNER D609 30001318 DIODE BA159 1A/800V 20A... - Page 8 21LF-90RU REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE L110 30013412 FERRITE SMD 1.5K/100MHz 500 mA(0805) C426 30016654 CAP SMD 100NF 16V K R (0603) L111 30013412 FERRITE SMD 1.5K/100MHz 500 mA(0805)
- Page 9 21LF-90RU REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE C643 30000116 CAP MKT 68NF 63V J R1002 30000492 RES CF 1/4W 120R J. C644 30000362 CAP EL 1UF 50V M. R101 30000489 RES SMD 1/10W 1R J (0805) C700 30012565 CAP SMD 1.8PF 50V J CH (0603)
- Page 10 21LF-90RU REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE R507 30000466 RES CF 1/4W 1K J. R668 30012641 RES SMD 1/16W 10K J (0603) R508 30000622 RES CF 1/4W 270R J R669 30012659 RES SMD 1/16W 2.2K J (0603)
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Page 11: How To Update The Technical Information
J303 30012985 JUMPER SMD 0610 30027691 CNAS 2P/690 90° DIS W/BLK C+FER AWG24 J304 30012985 JUMPER SMD 0611 30028208 POWER CORD SAFE EURO 2.2M SHARP W/F ROHS J305 30012985 JUMPER SMD 0612 35000013 SPRING ON/OFF SWITCH J306 30001734 JUMPER SMD (0805) - Page 12 Technical information and Production: Vestel Electronik AS PRINTED BY: Think Ecology, please use 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...