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LGE Internal Use Only
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING GUIDE
1. Check the booting Voltage
Make sure the Stand-by Voltage
P401 4,5,6 pin , L403 : +8.8V_ST
Make sure the Normal voltage
4,5,6,7,8 pin :13.2V
Make sure the output
of SoC(IC101) LVDS
Make sure the CLK of X101
Is 24MHz
Make sure the Inverter control
and error
P401 11pin : High
Exchange the LCD Module
Make sure the Output Voltage
of power block
IC400 : +5V, IC400 : +1.1V,
IC404: +1.5V, Q406 : +3.3V
Make sure the Power
Connector
or Exchange the L403
Make sure the disconnection of
Main board 13.2V circuit
Exchange the
Circuit board
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Make sure the PWR_ON of P401
1pin : 3.3V
Make sure the voltage
of LVDS Power
Q405 : 13.2V
Make sure the Power
Connector
or Exchange the L403
Exchange the X101
Re-download of Firmware
Exchange the
IC400,
IC404,
Q406
Exchange the Q405
Exchange the SoC(IC101)
Or Main board
Exchange the circuit or
check
The LCD module
Exchange the circuit board
No
Exchange the SoC(IC101)
Or Main board
No
Содержание 43LW540S
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