SAMSUNG Proprietary-Contents may change without notice
6-5
Troubleshooting
6-1-5 Abnormal Key Tone
Check initial status
Scanning signals
ouput from U104 pins
4A,4B,5A,5C,5D,6C,
5E.?
Check U104
pins 2A,4C and 3B.
Check CON J1.
Normal Key data input?
Replace the Keypad assembly.
Check U104 pins
4A,4B,5A,5C,5D,6C,5E.
END
Yes
Yes
Yes
Yes
No
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 ...