DOWNLOAD LG 42SL90QD-DA (CHASSIS:LT91L) Service Manual ↓ Size: 4.5 MB | Pages: 69 in PDF or view online for FREE

Model
42SL90QD-DA (CHASSIS:LT91L)
Pages
69
Size
4.5 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42sl90qd-da-chassis-lt91l.pdf
Date
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LG 42SL90QD-DA (CHASSIS:LT91L) Service Manual ▷ View online

Check Signal format
Is it supported?
Check the RCA Cable
YES
MAIN B’D JK402 Check
Replace MAIN B’D JK402
YES
NO
Check MAIN B’D R420
Video Signal ?
NO
YES
Check MAIN B’D C217
Video Signal ?
Replace
MAIN B’D C217
NO
Replace MAIN B’D IC 100
YES
Making 
전자 - 6-2
Revision 
2009. 2 . 1
LCD TV
Symptom
AV1 (CVBS) No Video
Problem
5/25
Check Signal format
Is it supported?
Check the RCA Cable
YES
MAIN B’D JK402 Check
Replace MAIN B’D JK404
YES
NO
Check MAIN B’D R465
Video Signal ?
NO
YES
Check MAIN B’D C211
Video Signal ?
Replace
MAIN B’D C211
NO
Replace MAIN B’D IC 100
YES
Making 
전자 - 6-2
Revision 
2009. 2 . 1
LCD TV
Symptom
AV2 (CVBS) No Video
Problem
6/25
Check Signal format
Is it supported?
Check the Component Cable
YES
MAIN B’D JK402 Check
Replace MAIN B’D JK402
YES
NO
Check MAIN B’D R421
Video Signal ?
NO
YES
Check MAIN B’D C200, C203 (Y)
C201 (Pb)
C202 (Pr)
Video Signal ?
Replace
MAIN B’D C200 or C203 or C201 or C202
NO
Replace MAIN B’D IC 100
YES
Making 
전자 - 6-2
Revision 
2009. 2 . 1
7/25
LCD TV
Symptom
Component1 No Video/ 
No Color Problem
Check Signal format
Is it supported?
Check the Component Cable
YES
MAIN B’D JK402 Check
Replace MAIN B’D JK402
YES
NO
Check MAIN B’D R422
Video Signal ?
NO
YES
Check MAIN B’D C214, C209 (Y)
C215 (Pb)
C216 (Pr)
Video Signal ?
Replace
MAIN B’D C214 or C209 or C215 or C216
NO
Replace MAIN B’D IC 100
YES
Making 
전자 - 6-2
Revision 
2009. 2 . 1
8/25
LCD TV
Symptom
Component2 No Video/ 
No Color Problem
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