Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
- 15 -
TROUBLESHOOTING
1. No Raster - LCD
(1) Symptom
1) Does’t minute discharge at module.
2) It maintains the condition where the front LED is normal.
(2) Check follow
Is the Inverter
On or Off
Check the Power board.
Off
No
Is the
inverter 24V on power
board normal
No
No
No
No
Is output
the normality Low/High
voltage except
stand-by 5V?
No
'Inverter_On'
Signal is High of 5
th
pin in
P1001 on
Main board
Yes
On
Yes
Is the link cable
normal?
1. Check the Inverter connector
2. Check the LCD Module
Yes
1. Check the Main Board.
1. Reconnect the link cable in
P1301
No
1. Check the Main board
1. Change the Power Board
1. Change the Main Board
Yes
Is the Power Board
normal?
Yes
Is the VSC Board
normal?
Is the P1301's output
normal?
Содержание 47LB9R Series
Страница 37: ...Oct 2007 Printed in Korea P NO MFL39407702 ...
