Sharp 20LK61M Service Manual

120LK31M20LK61MCOLOR TELEVISIONChassis No. SN-70AIn the interests of user-safety (Required by safety regulations in some countries) the set should be

1020LK31M20LK61M654321AB CDEFGHMODEL 20LK31M CHASSIS LAYOUTPWB-APWB-BPWB-C

1120LK31M20LK61M654321AB CDEFGHMODEL 20LK61M CHASSIS LAYOUTPWB-APWB-BPWB-C

1220LK31M20LK61M654321AB CDEFGHMODEL 20LK31M BLOCK DIAGRAM

1320LK31M20LK61M654321AB CDEFGHMODEL 20LK61M BLOCK DIAGRAM

1420LK31M20LK61MDESCRIPTION OF SCHEMATIC DIAGRAMNOTES:1. The unit of resistance "ohm" is omitted.(K=kΩ=1000Ω, M=MΩ)2. All resistors are 1/

1520LK31M20LK61M654321AB CDEFGHSCHEMATIC DIAGRAM: CRT and FRONT AV UnitË 20LK61MË 20LK31M

1720LK31M20LK61M16121110987654321ABCDEFGHMODEL 20LK31M SCHEMATIC DIAGRAM: MAIN Unit

1920LK31M20LK61M18121110987654321ABCDEFGHMODEL 20LK61M SCHEMATIC DIAGRAM: MAIN-1 Unit

2020LK31M20LK61M654321AB CDEFGHMODEL 20LK61M SCHEMATIC DIAGRAM: MAIN-2 Unit

2120LK31M20LK61M654321AB CDEFGHPWB-C: FRONT AV Unit (Wiring Side)PWB-B: CRT Unit (Wiring Side)PRINTED WIRING BOARD ASSEMBLIES

220LK31M20LK61MIMPORTANT SERVICE SAFETY PRECAUTIONËService work should be performed only by qualified service technicians who are throughlyfamiliar wi

2220LK31M20LK61M654321AB CDEFGHPWB-A: MAIN Unit (Wiring Side)

2320LK31M20LK61M654321AB CDEFGHPWB-A: MAIN Unit (Component Side)

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2420LK31M20LK61MPARTS LISTPARTS REPLACEMENTReplacement parts which have these

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2520LK31M20LK61MPWB-A: DUNTKA221WEV1 (20LK31M)PWB-A: DUNTKA221WEV3 (20LK61M)M

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2620LK31M20LK61MPWB-A: DUNTKA221WEV1 (20LK31M)PWB-A: DUNTKA221WEV3 (20LK61M)M

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2720LK31M20LK61MPWB-A: DUNTKA221WEV1 (20LK31M)PWB-A: DUNTKA221WEV3 (20LK61M)M

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2820LK31M20LK61MPWB-A: DUNTKA221WEV1 (20LK31M)PWB-A: DUNTKA221WEV3 (20LK61M)M

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2920LK31M20LK61MPWB-B: DUNTK9432WEW1CRT UNITTRANSISTORSQ852 VS2SC2229O/1E J 2

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code3020LK31M20LK61MMISCELLANEOUS PARTSåACC701QACCD3064CESA J AC Cord AM

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code3120LK31M20LK61MPACKING OF THE SETREARUse tapes tofix the packing case.★ Pack

320LK31M20LK61MSAFETY NOTICEMany electrical and mechanical parts in televisionreceivers have special safety-related characteristics.These characterist

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code3220LK31M20LK61MCOPYRIGHT © 2000 BY SHARP CORPORATIONALL RIGHTS RESERVED.No p

420LK31M20LK61MLOCATION OF USER'S CONTROLTVInfrared Transmitter WindowINPUTPress → Switch to external video inputmode.Press again → Switch to TV

520LK31M20LK61MCIRCUIT PROTECTIONThe receiver is protected by a 4.0A fuse (F701),mounted on PWB-A, wired into one side of the ACline input.X-RADIATION

620LK31M20LK61MFor adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit.Note: There are still a

720LK31M20LK61MBelow are the adjustments ranges and initial values for FIX VALUE category.FIX VALUEF01 OPTION 1 00-FF B0 A0F02 OPTION 2 00-FF 04 0CF03

820LK31M20LK61MWhite Balance Adjustment.1. Receive a good local channel.2. Select the service adjustment "S12" and set the datavalue to &quo

920LK31M20LK61MËMTS ADJUSTMENTMTS Level Adjustment1. Feed the following monaural signal to pin (14) ofIC3001.Monaural signal: 300Hz, 245mVrms2. Connec