Samsung SCH-E159 Service Manual page 10

SCH-E159 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-3 Abnormal Key Data Input
Check initial status
Yes
Scan1-6,keysense No
0-3 signal outputted
Check U201 and it's neighboring circuits
From U201?
Yes
No
Normal key data
Replace key dome sheet
Input?
Yes
END
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