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
Q108 & Q107?
‘L’ level from U104 pin13p?
Backligh LED or LCD on
Check U104 pin 13p
Check Q108 & Q107 and its
neighboring circuits.
Replace if required
Check U104 pin7L
Replace if required
Yes
No
Yes
No
Yes
No
Содержание SCH-A105
Страница 2: ... Samsung Electronics Co Ltd July 2000 Printed in Korea Code No GH68 01246A BASIC ELECTRONICS ...
Страница 58: ...9 Block Diagrams SAMSUNG Proprietary Contents may change without notice 9 1 ...
Страница 59: ...SAMSUNG Proprietary Contents may change without notice 10 1 10 PCB Diagrams 10 1 Main PCB Top View ...
Страница 60: ...SAMSUNG Proprietary Contents may change without notice 10 2 PCB diagrams 10 2 Main PCB Bottom View ...