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LC-20A2U

SERVICE MANUAL

S00J6LC-20A2U

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.

MODEL

LC-20A2U

CONTENTS

IMPORTANT SERVICE SAFETY NOTES ......... 2

SPECIFICATIONS ............................................. 4

OPERATION MANUAL ...................................... 5

DIMENSIONS .................................................... 7

REMOVING OF MAJOR PARTS ....................... 8

TROUBLE SHOOTING TABLE ........................ 11

ADJUSTMENT PROCEDURES ...................... 14

CHASSIS LAYOUT .......................................... 16

BLOCK DIAGRAM ........................................... 18

DESCRIPTION OF SCHEMATIC DIAGRAM .. 20

SCHEMATIC DIAGRAM

OPERATION UIT ....................................... 21

MAIN UNIT ................................................ 22

TERMINAL UNIT ....................................... 26

Page

Y/C SEPARATION UNIT ............................ 28

INVERTER UNIT ....................................... 30

PRINTED WIRING BOARD ASSEMBLIES ..... 31

PARTS LIST

ELECTRICAL PARTS ................................ 36

MAIN UNIT ................................................ 36

Y/C SEPARATION UNIT ............................ 40

TERMINAL UNIT ....................................... 42

INVERTER UNIT ....................................... 43

OPERATION UNIT .................................... 44

CABINET AND MECHANICAL PARTS ..... 44

ACCESSORIES PARTS ............................ 46

PACKING PARTS ...................................... 46

PACKING OF THE SET ................................... 47

SHARP CORPORATION

This document has been published to be used for
after sales service only.
The contents are subject to change without notice.

LCD COLOR TELEVISION

Содержание LC-20A2U

Страница 1: ...ASSIS LAYOUT 16 BLOCK DIAGRAM 18 DESCRIPTION OF SCHEMATIC DIAGRAM 20 SCHEMATIC DIAGRAM Ë OPERATION UIT 21 Ë MAIN UNIT 22 Ë TERMINAL UNIT 26 Page Page Ë Y C SEPARATION UNIT 28 Ë INVERTER UNIT 30 PRINTED WIRING BOARD ASSEMBLIES 31 PARTS LIST Ë ELECTRICAL PARTS 36 Ë MAIN UNIT 36 Ë Y C SEPARATION UNIT 40 Ë TERMINAL UNIT 42 Ë INVERTER UNIT 43 Ë OPERATION UNIT 44 Ë CABINET AND MECHANICAL PARTS 44 Ë ACCE...

Страница 2: ... create shock fire or other hazards WARNING 1 For continued safety no modification of any circuit should be attempted 2 Disconnect AC power before servicing BEFORE RETURNING THE RECEIVER Fire Shock Hazard Before returning the receiver to the user perform the following safety checks 1 Inspect all lead dress to make certain that leads are not pinched and check that hardware is not lodged between the...

Страница 3: ...ons X ou autres accidents AVERTISSEMENT 1 N entreprendre aucune modification de tout circuit C est dangereux 2 Débrancher le récepteur avant toute réparation VERIFICATIONS CONTRE L INCEN DIE ET LE CHOC ELECTRIQUE Avant de rendre le récepteur à l utilisateur effectuer les vérifications suivantes 1 Inspecter tous les faisceaux de câbles pour s assurer que les fils ne soient pas pincés ou qu un outil...

Страница 4: ...4 LC 20A2U Specifications ...

Страница 5: ...5 LC 20A2U Operation Manual ...

Страница 6: ...6 LC 20A2U ...

Страница 7: ...7 LC 20A2U Dimensions Unit inch mm ...

Страница 8: ...pieces of tape Disconnect the connection cables Note Some pieces of tape are located below the PWBs To access such tape detach the PWBs peel off the tape and disconnect the cables 8 Disconnect the connectors from the PWBs 2 Table Stand Table Stand Cover Cabinet B Cabinet A 5 4 1 Terminal Cover 6 7 6 8 6 9 6 6 6 5 6 4 6 3 6 2 6 1 3 3 Speaker Assembly Left Speaker Assembly Right SC1201 SC1202 P753 P...

Страница 9: ...lock screws from the MAIN PWB 10 Remove the four lock screws from the Y C SEPARATION PWB 11 Remove the three lock screws from the INVERTER PWB 12 Remove the lock screw from the TERMINAL PWB and the lock screw from the grounding terminal Detach the reinforcement plate too 13 Remove the two lock screws from the LCD display unit 14 Remove the three lock screws from the OPERATION PWB ...

Страница 10: ...flection sheets 17 Detach the top and bottom fluorescent lamps 18 Remove the photoconductive plate 19 Detach the top and bottom reflection sheets 20 Detach the ITO sheet 21 Detach the diffusion sheet and reflection deflection plate Fluorescent Lamp Top KLMP 0101CEZZ Lamp Reflector PSHEP0223CEZZ LCD Display Unit Fluorescent Lamp Bottom KLMP 0102CEZZ Lamp Reflector Bottom PSHEP0224CEZZ Diffusion She...

Страница 11: ...heck the tuner and its peripheral parts No Is input at pin 1 of IC402 as specified Check the line in question Yes Check IC402 and its peripheral parts Yes No Are pins 2 and 4 of IC402 at H and L respectively Are pins 65 and 66 of IC2001 at H and L respectively No VIDEO 1 output Yes No Is input at pin 1 of IC402 as specified Check the line in question Yes No Are pins 2 and 4 of IC402 both at L No V...

Страница 12: ...ble Replace F3701 and F3702 Check S4701 and connection cable Check the secondary side load of T701 Fluorescent lamp Yes No Does F7751 function Yes No Is Pin 34 of IC1201 at H Yes No Are the oscillation waveforms at the primary side of T7751 6 as specified Yes Replace F7751 No Is input at pin 71 of IC802 as specified Check SC3301 SC line and peripheral parts Yes Check the line IC1201 and its periph...

Страница 13: ...its peripheral parts Check the line in question IC7305 and its peripheral parts Yes Check the speakers and their peripheral parts No sound from headphone Yes No Is pin 55 of IC2001 at L Check the headphone and its peripheral parts Check Q306 J4001 and their peripheral parts No sound from output line Yes No Is pin 52 of IC2001 at L No Are outputs at pins 1 and 7 of IC902 as specified Yes Check the ...

Страница 14: ...electing a receiving channel Select an actual receiving channel with the CH keys Short push in Channels are selected one after another Long push in Channels are skipped up to the next receivable channel Adjustments All the items can be adjusted one by one with the MENU CH and VOL keys on the set and the remote controller The MENU key serves to toggle between adjustment items the next item is selec...

Страница 15: ...ent 1 Receive the monoscope pattern signal 2 Adjust so that the RCUTOFF and BCUTOFF settings on page 2 of the adjustment process are optimum Note The RCUTOFF and BCUTOFF settings in the adjustment process should be in the range of 10 thru 10 If without this range the variable user control range will be reduced 6 Factory Settings Holding down the TV VIDEO and MENU keys of the set at once turn on th...

Страница 16: ...7 16 LC 20A2U 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H CHASSIS LAYOUT MAIN Unit Side A Y C SEPARATION Unit Side A MAIN Unit Side B Y C SEPARATION Unit Side B OPERATION Unit INVERTER Unit TERMINAL Unit ...

Страница 17: ...19 18 LC 20A2U 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM ...

Страница 18: ...s are µF unless otherwise noted P pF µµF 2 All capacitors are 50V unless otherwise noted 3 All capacitors are Ceramic type unless otherwise noted ML Mylar TA Tantalum PF Polypro Film ST Styrol CAUTION This circuit diagram is original one therefore there may be a slight difference from yours SAFETY NOTES 1 DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACEING PARTS 2 SEMICONDUCTOR HEAT SINKS ...

Страница 19: ...21 6 5 4 3 2 1 A B C D E F G H LC 20A2U SCHEMATIC DIAGRAM Ë OPERATION Unit ...

Страница 20: ...23 22 LC 20A2U 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë MAIN Unit 1 2 ...

Страница 21: ...25 24 LC 20A2U 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë MAIN Unit 2 2 ...

Страница 22: ...27 26 LC 20A2U 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë TERMINAL Unit ...

Страница 23: ...29 28 LC 20A2U 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Ë Y C SEPARATION Unit ...

Страница 24: ...30 6 5 4 3 2 1 A B C D E F G H LC 20A2U Ë INVERTER Unit ...

Страница 25: ...31 6 5 4 3 2 1 A B C D E F G H LC 20A2U PRINTED WIRING BOARD ASSEMBLIES Y C SEPARATION Unit Side A Y C SEPARATION Unit Side B ...

Страница 26: ...32 6 5 4 3 2 1 A B C D E F G H LC 20A2U MAIN Unit Side A ...

Страница 27: ...33 6 5 4 3 2 1 A B C D E F G H LC 20A2U MAIN Unit Side B ...

Страница 28: ...34 6 5 4 3 2 1 A B C D E F G H LC 20A2U OPERATION Unit Wiring Side TERMINAL Unit Wiring Side ...

Страница 29: ...35 6 5 4 3 2 1 A B C D E F G H LC 20A2U INVERTER Unit Wiring Side ...

Страница 30: ...TC144EE AA Q2003 VS2SC2712Y 1 J 2SC2712Y AB Q2004 VSDTC144EE 1 J DTC144EE AA Q2005 VSDTA144EE 1 J DTC144EE AA Q2006 VSDTC144EE 1 J DTC144EE AA DIODES D201 VHDDAN222 1 J Diode AA D702 VHDSFPB56 2E J Diode AC D703 VHD1SS250 1E J Diode AB D704 VHD1SS250 1E J Diode AB D705 VHDDAN222 1 J Diode AA D706 VHDSFPB74 2E J Diode AD D707 VHDDAN222 1 J Diode AA D709 VHDDAN222 1 J Diode AA D710 VHDDAN222 1 J Dio...

Страница 31: ...0 35V Electrolytic AE C721 RC EZ1340CEZZ J 33 50V Electrolytic AD C722 VCKYTV1HF104Z J 0 1 50V Ceramic AA C728 VCKYTV1HF104Z J 0 1 50V Ceramic AA C729 VCKYTV1CF105Z J 1 0 16V Ceramic AB C731 VCCCCY1HH181J J 180p 50V Ceramic AA C733 RC EZ0538CEZZ J 330 16V Electrolytic AE C734 VCKYTV1CF105Z J 1 0 16V Ceramic AB C735 RC EZ0416CEZZ J 330 6 3V Electrolyitc AD C736 RC EZ0416CEZZ J 330 6 3V Electrolyitc...

Страница 32: ... AA C1213 VCEAPF0JW107M J 100 6 3V Electrolytic AC C1214 VCEAPF0GW107M J 100 4 0V Electrolytic AC C1215 RC KZ1025CEZZ J 1 0 10V Ceramic AB C1216 VCEAPF1VW226M J 22 35V Electrolytic AB C1218 VCEAPF1CN106M J 10 16V Electrolytic AD C2001 VCKYCY1HB102K J 1000p 50V Ceramic AA C2002 VCCCCY1HH221J J 220p 50V Ceramic AA C2003 VCEAPF1HW105M J 1 0 50V Electrolytic AB C2004 VCCCCY1HH220J J 22p 50V Ceramic AA...

Страница 33: ...xide AC R803 VRS CB1JF220J J 22 1 16W Metal Oxide AC R804 VRS CA1JF101J J 100 1 16W Metal Oxide AA R806 VRS CY1JF221J J 220 1 16W Metal Oxide AA R807 VRS CY1JF000J J 0 1 16W Metal Oxide AA R808 VRS CY1JF000J J 0 1 16W Metal Oxide AA R809 VRS CY1JF000J J 0 1 16W Metal Oxide AA R810 VRS CB1JF220J J 22 1 16W Metal Oxide AC R811 VRS CY1JF222J J 2 2k 1 16W Metal Oxide AA R812 VRS CY1JF000J J 0 1 16W Me...

Страница 34: ...xide AC R2025 VRS CY1JF103J J 10k 1 16W Metal Oxide AA R2028 VRS CB1JF102J J 1 0k 1 16W Metal Oxide AA R2031 VRS CY1JF101J J 100 1 16W Metal Oxide AA R2032 VRS CY1JF471J J 470 1 16W Metal Oxide AA R2033 VRS CY1JF105J J 1 0M 1 16W Metal Oxide AA R2035 VRS CY1JF102J J 1 0k 1 16W Metal Oxide AA R2041 VRS CA1JF101J J 100 1 16W Metal Oxide AA R2042 VRS CY1JF101J J 100 1 16W Metal Oxide AA R2043 VRS CY1...

Страница 35: ...CKYCY1HB103K J 0 01 50V Ceramic AA C7054 VCKYCY1HB103K J 0 01 50V Ceramic AA C7055 VCEAPF0JW107M J 100 6 3V Electrolytic AC C7056 VCEAPF0JW107M J 100 6 3V Electrolytic AC C7057 VCKYCY1CF104Z J 0 1 16V Ceramic AA C7058 VCKYCY1CF104Z J 0 1 16V Ceramic AA C7059 VCEAPF1HW474M J 0 47 50V Electrolytic AB C7060 VCCCCY1HH391J J 390p 50V Ceramic AA C7061 VCKYCY1CF104Z J 0 1 16V Ceramic AA C7062 VCCCCY1HH12...

Страница 36: ...59CEZZ J Ferrite Bead AB FB7056 RBLN 0059CEZZ J Ferrite Bead AB FB7057 RBLN 0059CEZZ J Ferrite Bead AB FB7058 RBLN 0059CEZZ J Ferrite Bead AB P7101 QPLGN0241CEZZ J Plug 2 pin AA P7102 QPLGN0841CEZZ J Plug 8 pin AB P7301 QPLGN0278GEZZ J Plug 2 pin AA P7305 QPLGN0278GEZZ J Plug 2 pin AA SC7001 QSOCN0484FJZZ J Socket 16 pin AE PRDAR3229CEFW J Heat Sink AG PSLDM0132CEZZ J Shield AE PSLDM4639CEFW J Shi...

Страница 37: ...3J J 10k 1 16W Metal Oxide AA R3431 VRS CY1JF104J J 100k 1 16W Metal Oxide AA R3432 VRS CY1JF104J J 100k 1 16W Metal Oxide AA R3435 VRS CY1JF103J J 10k 1 16W Metal Oxide AA R3461 VRS CY1JF104J J 100k 1 16W Metal Oxide AA R3462 VRS CY1JF104J J 100k 1 16W Metal Oxide AA R3463 VRS CY1JF102J J 1 0k 1 16W Metal Oxide AA R3464 VRS CY1JF102J J 1 0k 1 16W Metal Oxide AA R3465 VRS TV1JD1R0J J 1 0 1 16W Met...

Страница 38: ...J Cover LED AE 1 3 GCOVA1798CESA J Cover Front L AF 1 4 GCOVA1917CEKA J Cover Front R AG 1 5 GCOVA1932CESA J Cover IR Filter AC 1 6 GDORF2048CEKA J Front Door AF 1 7 HDECA0759CESA J Decoration Panel BW 1 8 HiNDP5645CESA J Indication Plate AD Cabinet Side 1 9 HiNDP5646CESA J Indication Plate AD Door Side 1 10 JBTN 2057CEKA J Power Button AF 1 11 LX HZ3111CEFN J Screw x4 AB 1 12 MSPRC0203CEFW J Spri...

Страница 39: ... 6 17 58 25 62 36 47 52 50 2 11 2 11 2 10 2 17 2 1 47 52 33 45 41 44 3 52 52 34 50 56 39 22 19 19 19 19 21 13 9 10 8 24 7 7 2 13 23 26 2 6 2 6 2 5 2 13 2 5 2 8 2 7 2 13 2 12 18 2 9 2 2 52 20 29 Terminal Unit Inverter Unit Y C Separation Unit Main Unit Operation Unit 1 11 1 12 1 8 1 14 1 20 1 4 1 15 1 2 1 3 1 1 1 11 1 9 1 6 1 7 1 5 1 10 1 4 31 52 37 46 1 17 1 16 1 19 1 19 1 18 1 13 1 21 ...

Страница 40: ...51 RCORF0106CEZZ J Core AH 52 XBBSD30P06000 J Screw x12 AA 53 XBBSF30P04000 J Screw x4 AA 54 XBBSF30P08000 J Screw x6 AA 55 XBBSF40P25000 J Screw x4 AA 56 XBPSD30P06JS0 J Screw AA 57 XEBSD30P08000 J Screw x8 AA 58 XEBSD40P10000 J Screw x2 AA 59 XEBSF30P08000 J Screw x4 AA 60 XEBSF40P16000 J Screw x5 AA 61 XTBSF30P12000 J Screw x4 AA 62 CZETK0093CE02 J Insulating Sheet AN 63 TLABN0260CEZZ J Product...

Страница 41: ...G OF THE SET Packing Case AC Cord AC Adaptor Buffer Material Caution Label for Carrying Reinforcing Pad Speaker Net Reinforcing Pad Wireless Remote Control Antenna Cable Accessories Operation Manual Cable Clamp Batteries ...

Страница 42: ...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 D Japan P Japan TQ0998 S Oct 2000 Printed in Japan NA KG ...

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