Read LG 42LT560E-SA (CHASSIS:LJ2AC) Service Manual online
- 14 -
TROUBLE SHOOTING
1. Power-up boot check
Check stand-by Voltage.
P404/P401 9~12pin : +3.5V_ST
Check Power connector
Main B/D 3.5V Line
Short Check
Check X201 clock
24 MHz
Replace X201
Check P404/P401 PWR_ON.
1pin : 3.3V
Replace Mstar(IC101) or Main board
Check Multi Voltage
P404/P401 2pin:24V ,17pin:12V
Replace Power Board
Check Inverter Control & Error Out
P404/P401 18 pin : High
P404/P401 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
ok
No
No
ok
Replace Power board.
ok
No
No
No
No
No
No
No
No
Click on the first or last page to see other 42LT560E-SA (CHASSIS:LJ2AC) service manuals if exist.