DOWNLOAD LG 55LH50YD (CHASSIS:LB91B) Service Manual ↓ Size: 7.68 MB | Pages: 66 in PDF or view online for FREE

Model
55LH50YD (CHASSIS:LB91B)
Pages
66
Size
7.68 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55lh50yd-chassis-lb91b.pdf
Date
PREV: LG 55LH50 (CHASSIS:LA91L) Service Manual

LG 55LH50YD (CHASSIS:LB91B) Service Manual ▷ View online

Check the RCA Cable
YES
Check MAIN B’D
C229, C230
MAIN B’D
C2011 (Right Sound)
C2012 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
AV1 Video OK ?
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
Making 
Revision 
2009. 2 . 1
16/25
LCD TV
Symptom
AV1 No Audio Problem
Check the RCA Cable
YES
Check MAIN B’D
C2008, C2009
MAIN B’D
C2008 (Right Sound)
C2009 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
AV2 Video OK ?
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
Making 
Revision 
2009. 2 . 1
17/25
LCD TV
Symptom
AV2 No Audio Problem
Check the Component Cable
YES
Check MAIN B’D
C229, C230
MAIN B’D
C229 (Right Sound)
C230 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
Component Video OK ?
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
Making 
Revision 
2009. 2 . 1
18/25
LCD TV
Symptom
Component1 No Audio Problem
Check the Component Cable
YES
Check MAIN B’D
C2013, C2014
MAIN B’D
C2013 (Right Sound)
C2014 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
Component Video OK ?
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
Making 
Revision 
2009. 2 . 1
19/25
LCD TV
Symptom
Component2 No Audio Problem
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