
SAMSUNG Proprietary-Contents may change without notice
6-3
Troubleshooting
6-1-3 Abnormal Backlight,LCD or LED Operation
Press and button on the phone
‘H’ level output from
U104 pin 7L?
‘H’ level
from U101 pin7L drive
Q107 & Q108?
‘L’ level from U104 pin13p?
Backligh LED or LCD on
Check U104 pin 13p
Check Q107 & Q108 and its
neighboring circuits.
Replace if required
Check U104 pin7L
Replace if required
Yes
No
Yes
No
Yes
No