LG 32LX330C Series, Service Manual

Page: 17 / 55

- 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLESHOOTING GUIDE
1. Check the booting Voltage
Make sure the Stand-by Voltage
P401 4,5,6 pin ,
L403 : +8.8V_ST
Make sure the Power
Connector
or Exchange the L403
Make sure
the disconnection of
Main board 13.2V circuit
Exchange the
Circuit board
Make sure the Normal voltage
4,5,6,7,8 pin
:13.2V
Make sure the Power
Connector
Exchange the L403, L415
Exchange the circuit
board
Make sure the CLK of X101
Is 24MHz
Exchange the X101
Make sure the PWR_ON of
P401
1pin : 3.3V
Re-download of Firmware
Exchange
the LGE2134(IC101)
Or Main board
Make sure the Output Voltage of
power block
IC400 : +5V, IC400 : +1.1V,
IC404: +1.5V, Q406 : +3.3V
Exchange the IC400, IC404,
Q406
Make sure the voltage of
LVDS Power
Q405 : 13.2V
Exchange the Q405
Make sure the output of
LGE2134(IC101) LVDS
Exchange the
LGE2132(IC101)
Or Main board
Make sure
the Inverter control and error
P401 11pin : High
Exchange the circuit or check
The LCD module
Exchange the LCD Module
NO NO
NO
NO NO
NO
NO
NO
NO
NO YES YES
YES
YES
YES
YES
YES
YES
YES
YES