LG 49LF5400 - Trouble Shooting

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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. Power-up boot check
Check PSU DC Voltage
P401_5,6,7,8 pin : 13.2V
Check stand-by Voltage
L202 : +3.3V
Check P200 PWR_ON.
1pin : 3.3V
Check X100 clock
24 MHz
Check Mstar LVDS
Output
Check DRV ON Control
P200 11pin : High
Change Module
Check TCON(Module)
Panel_VCC
Q205 : 13.2V
Check IC402/3/4 Output
Voltage
IC202 : 1.15V & 5V
IC200 : 1.8V
Q204 : 3.3V
NO
NO
NO
NO
NO
NO
NO
NO
OK
OK
NO
OK
Check 12pin
Power connector
Main B/D 3.3V Line
Short Check
Re-download software.
Replace X100
Replace Mstar(IC102) or
Main Board
Check PSU
Replace Q205
Replace IC402, IC403,
IC404, Q403
Main B/D 13.2V Line
Short Check
Replace IC201
(DCDC)
Replace Mstar(IC102)
or Main board
Replace PSU
OK
OK
OK
OK
OK
OK
OK
OK