DOWNLOAD LG 37LH50YD (CHASSIS:LB91B) Service Manual ↓ Size: 4.92 MB | Pages: 66 in PDF or view online for FREE

Model
37LH50YD (CHASSIS:LB91B)
Pages
66
Size
4.92 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37lh50yd-chassis-lb91b.pdf
Date
PREV: LG 37LH40FD (CHASSIS:LC91A) Service Manual

LG 37LH50YD (CHASSIS:LB91B) Service Manual ▷ View online

Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
Analog TV Video Problem
4/25
Check RF Cable
MAIN B’D L1111 = 5V ?
YES
MAIN B’D L1112 = 3.3V ?
NO
Replace MAIN B’D IC1103
YES
NO
Replace MAIN B’D IC808
MAIN B’D L1113 = 1.8V ?
Replace MAIN B’D IC1105
YES
NO
YES
MAIN B’D X1101 Clock ?
NO
Replace MAIN B’D X1101
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 
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 
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 
Revision 
2009. 2 . 1
7/25
LCD TV
Symptom
Component1 No Video/ 
No Color Problem
Page of 66
Display

Click on the first or last page to see other 37LH50YD (CHASSIS:LB91B) service manuals if exist.

RANDOM: