DOWNLOAD LG 22LH250C (CHASSIS:LD91Z) Service Manual ↓ Size: 6.95 MB | Pages: 76 in PDF or view online for FREE

Model
22LH250C (CHASSIS:LD91Z)
Pages
76
Size
6.95 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
22lh250c-chassis-ld91z.pdf
Date
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P800 Pin #20
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
P800 Pin #13, 14 = 12V  
P800 Pin #17, 18 = 24V ?
Check LVDS Cable
OK ?
YES
Replace LVDS Cable
NO
Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
No OSD
26~42LH250C
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
19~22LH250C
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
19~42LH250C
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
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