Key Data Input - Samsung SGH-J400 Service Manual

9-5. Key Data Input

Check Initial Operation
When one of the keys is
pushed,
is it displayed on LCD?
When one of the keys is
KEY_IO signal is OK?
Yes
Yes
pushed,
Yes
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
Check the Dome sheet & Key Pad
No
Replace the PBA
9-9
Flow Chart of Troubleshooting