DOWNLOAD LG 42LH250C (CHASSIS:LD91Z) Service Manual ↓ Size: 7.51 MB | Pages: 76 in PDF or view online for FREE

Model
42LH250C (CHASSIS:LD91Z)
Pages
76
Size
7.51 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lh250c-chassis-ld91z.pdf
Date
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LG 42LH250C (CHASSIS:LD91Z) Service Manual ▷ View online

Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
Analog TV Video Problem
Check RF Cable
MAIN B’D L1201 = 5V ?
YES
MAIN B’D L1202 = 3.3V ?
NO
Replace MAIN B’D IC809
YES
NO
Replace MAIN B’D IC808
MAIN B’D IC804
Pin #2 = 1.2V ?
Replace MAIN B’D IC804
YES
NO
YES
MAIN B’D R1210 Clock ?
NO
Replace MAIN B’D TU1200
19~42LH250C
Check Signal format
Is it supported?
Check the SCART Cable
YES
MAIN B’D JK1100 Check
Replace MAIN B’D JK1100
YES
NO
Check MAIN B’D R1117
Video Signal ?
NO
YES
Check MAIN B’D C210
Video Signal ?
Replace
MAIN B’D C210
NO
Replace MAIN B’D IC 100
YES
Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
AV1(Scart CVBS) No Video
Problem
19~42LH250C
Check Signal format
Is it supported?
Check the SCART Cable
YES
Check MAIN B’D JK1100
Replace MAIN B’D JK1100
YES
NO
YES
Check MAIN B’D C200 (RED)
C201 (GREEN)
C202 (BLUE)
Video Signal ?
Replace
MAIN B’D C200, C201, C202
NO
Replace MAIN B’D IC 100
YES
Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
AV1(Scart RGB) No Video 
Problem
19~42LH250C
Check Spec (Refer to User Manual)
Is it supported?
Check the SCART Cable
YES
MAIN B’D IC100 Check
YES
Check MAIN B’D C1142
Video Signal ?
NO
Replace MAIN B’D Q1205
YES
Check MAIN B’D C1107
Video Signal ?
NO
MAIN B’D JK1100 Check
YES
Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
AV1 No Video Out Problem
19~42LH250C
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