DOWNLOAD LG 42LH90QD (CHASSIS:LT91C) Service Manual ↓ Size: 7.11 MB | Pages: 72 in PDF or view online for FREE

Model
42LH90QD (CHASSIS:LT91C)
Pages
72
Size
7.11 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lh90qd-chassis-lt91c.pdf
Date
PREV: LG 42LH90 (CHASSIS:LA92C) Service Manual

LG 42LH90QD (CHASSIS:LT91C) Service Manual ▷ View online

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
19
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
20
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 
Revision 
2009. 2 . 1
8/25
LCD TV
Symptom
Component2 No Video/ 
No Color Problem
21
Check Signal format
Is it supported?
Check the RGB Cable
YES
MAIN B’D JK405 Check
Replace MAIN B’D JK405
YES
NO
NO
YES
Check MAIN B’D C207 (Video)
R2030 (HSYNC)
R2031 (VSYNC)
Replace
MAIN B’D C207 or R2030 or R2031
NO
Replace MAIN B’D IC 100
YES
MAIN B’D JK405 Pin #2
Video signal ?
R446 has Vsync ?
R447 has Hsync ?
Making 
Revision 
2009. 2 . 1
9/25
LCD TV
Symptom
RGB No Video Problem
22
Page of 72
Display

Click on the first or last page to see other 42LH90QD (CHASSIS:LT91C) service manuals if exist.

RANDOM: