Samsung GT-S5200 Service Manual page 44

Flow Chart of Troubleshooting
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_ROW(4)
VDD_MAINKEY_3V3
1 3 4 5 6
ZD501
2 PESD5V0L5UV
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HDC500
1 1 2 2
3 3 4 4
5 5 6 6
7 7 8 8
9 9 10 10
11 11 12 12
13 14
13 14
15 16 16
15
9-16
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)