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Flow Chart of Troubleshooting
7-16
KEY_CONNECTOR
7
8
8
9
9
18
18
19
19
2
2
20 20
3
3
4
4
5
5
6
6
7
10
10
11
11
12
12
13
13
14
14
15
15
16 16
17
17
HDC710
1
1
2
3
4
56
78
9
*
U720
1
10
9
*
1
10
23
4
5
6
7
8
U721
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_COL(0)
+VDD_BL