Read LG 22LD350 (CHASSIS:LT01A) Service Manual online
1. Power-up boot check
Check stand-by Voltage.
P403 or P404 9~12pin : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X1002 clock
32 KHz
Replace X1002
Check P403 or P404 PWR_ON.
1pin : 3.3V
Replace Micom(IC1002) or Main board
Check Multi Voltage
P403 2 pin : 20V, 17 pin : 12V
P404 2 pin : *20V, 17 pin : 12V
Replace Power Board
Check Inverter Control & Error Out
P403 or P404 18 pin : High
P403 or P404 24 pin : Low
Check Power Board or Module
Check IC402/3/5/7 Output Voltage
IC402 : 2.5V
IC403 : 1.26V
IC405 : 3.3V
IC407 : 1.5V
IC407 : 1.5V
Replace IC402/ 3 / 5 / 7
Re-download Micom software.
Check Micom Voltage
IC1002 pin 48 : +3.5V
IC1002 pin 48 : +3.5V
Replace L404
*20V Voltage is dependent on Model
26LD350 => 24V
26LD350 => 24V
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
ok
ok
No
No
No
No
No
No
No
No
No
No
Check X201 Clock
24 MHz
Replace X201
ok
No
Replace Power board.
ok
-. P403 : 37inch / 42inch Model
-. P404 : 26inch / 32inch Model
-. P404 : 26inch / 32inch Model
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