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LGE Internal Use OnlyCopyright ©2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 14 -
1. Power-up boot check
TROUBLESHOOTING
Check stand-by Voltage.
P403 9~12pin : +3.5V_ST
Check Power connector.
Main B/D 3.5V Line
Short Check
Check X201 clock.
24 MHz
Replace X201.
Check P403 PWR_ON.
1pin : 3.3V
Replace Mstar(IC101) or Main board.
Check Multi Voltage.
P403 2pin:24V, 17pin:12V
Replace Power Board.
Check Inverter Control & Error Out.
P403 18 pin : High
P403 24 pin : low
Check Power Board or Module.
Check IC402/3/7 Output Voltage.
IC402 : 2.5V
IC403 : 1.1V
IC407 : 1.5V
Q403 : 3.3V
Replace IC402/3/7, Q403.
Re-download software.
Check Micom Voltage.
L404 : +3.5V
Replace L404.
Check LVDS Power Voltage.
Q409 : 12V
Replace Q409.
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
Change Module.
ok
ok
ok
ok
ok
ok
ok
ok
okNo
No
No
No
No
No
No
No
No
No
ok
Replace Power board.
ok