LG 32LH200H (CHASSIS:LD91Y) Service Manual ▷ View online
Check Power connector
OK ?
Replace Power Board
NO
YES
Replace Power Board
NO
Replace MAIN B’D IC801
NO
Replace MAIN B’D IC805
NO
Replace MAIN B’D IC806
NO
Replace MAIN B’D IC100
NO
Replace MAIN B’D IC103
Serial Flash
NO
Replace MAIN B’D
IC300, IC301 DDR2 Memory
NO
Replace MAIN B’D IC100
NO
Making
Revision
2009. 2 . 1
LCD TV
Symptom
Power-Up Boot Fail
22LH200H
P801 Pin #5~#6
Voltage Level = 5V ?
YES
P801 Pin #1, 2 = 15V?
MAIN B’D L803 = 3.3V ?
YES
MAIN B’D L813 = 1.26V ?
YES
MAIN B’D L805 = 3.3V ?
YES
Check MAIN B’D X100 Clock
12MHz
YES
Replace MAIN B’D IC102
NAND FLASH
YES
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
22~42LH200H
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
22LH200H
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
22~42LH200H
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