Read LG 60LS5700 / 60LS5750 / 60LS579C (CHASSIS:LA22E) Service Manual online
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TROUBLE SHOOTING
1. Power-up boot check
Check stand-by Voltage.
P2400 9~12pin : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X300 clock
32.768 KHz
Replace X300
Check P2400 PWR_ON.
1pin : 3.3V
Replace Micom (IC3000) or Main board
Check Multi Voltage
P2400 2,3,4pin:24V
17,19,21pin:12V
Replace Power Board
Check Inverter Control
P2400 18 pin : High
Check Power Board or Module
Check IC Input & Output Voltage
IC2404 : Input 12V, Output 5V
IC2400 : Input 12V, Output 1.2V
IC2403 : Input 3.5V, Output 1.5V
IC2405 : Input 12V, Output 3.3V
IC6503 : Input 3.3V, Output 1.8V
Replace IC2400,2403, 2404,2405,6503
Re-download software.
Check Micom Voltage
IC3000 48Pin : +3.5V
Check L2402
Check LVDS Power Voltage
Q2407 : 12V
Replace Q2407
Check Mstar LVDS Output
Replace LGE2112(IC105) or Main Board
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
No
No
No
No
No
No
ok
Replace Power board.
ok
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