DOWNLOAD LG 47SL90QD-AA (CHASSIS:LB91L) Service Manual ↓ Size: 4.57 MB | Pages: 65 in PDF or view online for FREE

Model
47SL90QD-AA (CHASSIS:LB91L)
Pages
65
Size
4.57 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
47sl90qd-aa-chassis-lb91l.pdf
Date
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Making 
Revision
2009. 2 . 1
13/25
LCD TV
Symptom
All Source no Audio Problem
Check The Speaker
Replace Speaker
Revision 
Check Speaker Cable
YES
NO
Replace Speaker Cable
NO
YES
Replace MAIN B’D IC807
NO
YES
MAIN B’D
L824 = 1.8V
YES
MAIN B’D
Check R701, R702, R705
Signal
YES
Replace MAIN B’D IC100
NO
Check P700 Cable
NO
MAIN B’D
L705 Pin #1
L704 Pin #2
PWM Signal ?
YES
Replace MAIN B’D IC701
NO
Replace MAIN B’D IC 701
YES
Making 
Revision
2009. 2 . 1
14/25
LCD TV
Symptom
Digital TV No Audio Problem
Digital TV Video OK ?
Revision 
YES
Replace MAIN B’D IC 100
Making 
Revision
2009. 2 . 1
15/25
LCD TV
Symptom
Analog TV No Audio Problem
Revision 
Analog TV Video OK ?
YES
Check MAIN B’D
R2046 Signal (SIF)
Replace MAIN B’D IC100
YES
MAIN B’D
L1101 Signal (SIF)
Replace MAIN B’D IC1102
NO
NO
YES
Making 
Revision
2009. 2 . 1
16/25
LCD TV
Symptom
AV1 No Audio Problem
AV1 Video OK ?
Revision 
Check the RCA Cable
YES
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
MAIN B’D
C2011 (Right Sound)
C2012 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
Check MAIN B’D
C229, C230
NO
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