
SAMSUNG Proprietary-Contents may change without notice
Level 3 Repair
8-22
This Document can not be used without Samsung's authorization
8-3-9. Key Data Input
Check Initial Operation
Yes
When one of the keys is
pushed, is it displayed on
LCD?
Change the Dome sheet
Yes
All of the key doesn't work
except POWER ON KEY ?
Replace the U502
Yes
No
END
No
VDD_IO1_1.8V=1.8V?
Resolder or Replace UCP200
(be possible of soldering not well or being
UCP a bad sample)
No
Yes