DOWNLOAD LG 42LH3000 / 42LH3010 / 42LH3020 / 42LH3040 (CHASSIS:LD91A) Service Manual ↓ Size: 4.15 MB | Pages: 79 in PDF or view online for FREE

Model
42LH3000 42LH3010 42LH3020 42LH3040 (CHASSIS:LD91A)
Pages
79
Size
4.15 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lh3000-42lh3010-42lh3020-42lh3040-chassis-ld91a.pdf
Date
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LG 42LH3000 / 42LH3010 / 42LH3020 / 42LH3040 (CHASSIS:LD91A) Service Manual ▷ View online

P801 Pin #9
Voltage level = 2V 
Check Power connector
OK ?
Replace Power Board
YES
NO
YES
NO
YES
Replace MAIN B’D Q802
MAIN B’D L1300 = 12V ?
Replace MAIN B’D Q806
NO
Replace Main Board
YES
P801 Pin #1, 2 = 15V?
Check LVDS Cable
OK ?
YES
Replace LVDS Cable
NO
Making 
Revision 
2009. 2 . 1
 LCD TV
Symptom
No OSD
19~22LH2000
4/34
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
Making 
Revision 
2009. 2 . 1
 LCD TV
Symptom
Digital TV Video Problem
26~42LH2000
32~47LH3000/LH4000
5/34
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
26~42LH2000
32~47LH3000/LH4000
6/34
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
26~42LH2000
32~47LH3000/LH4000
7/34
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