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1. Power-up boot check
Check stand-by Voltage.
P401 3, 5pin : +3.5V_ST
ok
Check stand-by Voltage
L404, L408 : +3.5V
ok
Check X201 clock
24 MHz
ok
Check P401 PWR_ON.
1pin : 3.3V
ok
Check Multi Voltage
P401 9, 10pin : 24V
/ 13, 14, 15pin:12V
ok
Check IC402/3/7 Output Voltage
IC402 : 2.5V
IC403 : 1.15V
IC407 : 1.5V
Q403 : 3.3V
ok
Check LVDS Power Voltage
Q409 : 12V
ok
Check Mstar LVDS Output
ok
Check DRV ON Control
P403 2 pin : High
ok
Change Module
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LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
No
Check 18pin Power connector
No
Replace L404, L408
No
Replace X201
No
Re-download software.
No
Replace Power Board
No
Replace IC402, IC403, IC407, Q403
No
Replace Q409
No
Replace Mstar(IC101) or Main Board
No
Check Power Board
Main B/D 3.5V Line
ok
Short Check
No
Replace Mstar(IC101) or Main board
- 16 -
ok
Replace Power board.
LGE Internal Use Only
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