LG 32LD350 Service Manual page 34

1. Power-up boot check
Check stand-by Voltage.
P403 9~12pin : +3.5V_ST
ok
Check Micom Voltage
IC400 pin 3 : +3.3V
ok
Check X100 clock
12MHz
ok
Check P403 PWR_ON.
1pin : 3.3V
ok
Check Multi Voltage
P403 2 pin : 24V , 17 pin : *12V
ok
Check Inverter Control & Error Out
P403 18 pin : High
P403 24 pin : low
ok
Check IC403/5/7 Output Voltage
IC403 : 1.26V
IC405 : 3.3V
IC407 : 1.8V
ok
Check LVDS Power Voltage
Q409 : 12V
ok
Check Mstar LVDS Output
ok
Change Module
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Only for training and service purposes
No
Check Power connector
No
Replace IC400
No
Replace X100.
No
Re-download software.
No
Replace Power Board
No
Check Power Board or Module
No
Check
Enable Signal & VCC IN
IC403,IC405,IC407
No
Replace Q409
No
Replace Mstar(IC100) or Main Board
ok
Check Fuse.
No
Replace Mstar(IC100) or Main board
*12V Voltage is dependent on Model
26/32LD350 => 12V
19/22LD350 => 15V
OK
Replace IC403/5/7
ok
Replace Power board.
LGE Internal Use Only