4. TROUBLE SHOOTING
- 99 -
LGE Internal Use Only
Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes
START
Yes
Resolder CN404 or
replace touch panel
Check IC signal of U01
R9, R30 (TP3~4)
Yes
Resolder or Replace
U01
No
Check supply voltage of U40
C417 (TP1)
Check touch signal
ZD40~405 (TP5~8)
Resolder or Replace
U40
No
Yes
Check CN404 and
touch panel
contact
Contact well CN404 and
touch panel
No
Touch will work
properly
Yes