Samsung GT-S5200 - Key Data Input

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Flow Chart of Troubleshooting
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9-15
9-7.
Key Data Input
When one of the keys is
pressed,
is it displayed on LCD?
Check the Dome sheet or
the KeyPBA connection with HDC50
0
END
No
Yes
Yes
Check Initial Operation
When one of the keys is
pressed,
KBIO signal is OK?
Replace the PBA
No
Yes