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Flow Chart of Troubleshooting
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7-19
9. Key Back Light
Is BACKLIGHT set
AlwaysON in the Menu?
Set BACKLIGHT on AlwaysON
END
No
Yes
Yes
Key Backlight does not work
CN601 pin 19
Current > "20mA"?
No
Replace KeyPCB Module or
Yes
R607
VBATT_LCD
C613
6
7
7
8
8
9 9
21 21
22 22
23
23
24
24
3
3
4
4
5 5
6
14 14
15
15
16
16
17 17
18 18
19
19
2 2
20
20
CN601
1 1
10 10
11
11
12
12
13 13
C614