Trouble Shooting Guide - LG 19LV2500 Service Manual

Trouble shooting guide

1. Power-up boot check
Check Adater power.
JK7500 : 24V
ok
Check Standby Voltage
C7538 : +3.5V_ST
ok
Check X201 clock
24 MHz
ok
Check R7505(RL_ON).
RL_ON : 3.3V
ok
Check IC7502/7, IC403/7 Output Voltage
IC7502 : 12V
IC7507 : 5.0V
IC403 : 1.1V
IC407 : 1.5V
Q403 : 3.3V
ok
Check LVDS Power Voltage
Q7506 : 5V(22"/19")
ok
Check Mstar LVDS Output
ok
Check Inverter Control
P10001
ok
Change Module
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Only for training and service purposes
No
Replace Adapter
No
Replace IC7503
No
Replace X201
No
Re-download software.
No
Replace IC7502/7, IC403/7, Q403
No
Replace Q7506
No
Replace Mstar(IC101) or Main Board
No
Change LED driver IC(IC10000)
No
Replace Mstar(IC101) or Main Board
LGE Internal Use Only