Key Data Input - Samsung SGH-E350E Service Manual

Flow Chart of Troubleshooting

7-7. Key Data Input

Check Initial Operation
When one of the keys is
is it displayed on LCD ?
When one of the keys is
KBIO signal is OK ?
KEY_COL(0:4)
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
KEY_ROW(0:2)
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
Yes
pushed,
Yes
pushed,
Yes
END
12
STAR1
12
DIGIT10
12
SHARP1
KEY_MAP
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No
Check the Dome sheet & Key Pad
No
Replace the PBA
12 12
DIGIT7 DIGIT4
1 2 12
DIGIT9 DIGIT6
12
DIGIT8
7-18
1 2 12
DIGIT1 DIGIT2
1 2 12
DIGIT3 DIGIT5