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F low Chart of Troubleshooting
7-10. Key Back Light
M a inK e y LE Dd o e sn o t w o rk
U 6 0 4p in 1=H?
6
CE
KEY_LED_ON
5
GND
4
NC
VOUT
Y e s
Y e s
E N D
VBAT
U604
1
VDD
2
GND
3
R633
R609
R610
C613
56
56
56
LED617
LED611
LED612
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N o
C h e ck th eU 2 0 0re la te dto"V D D _ K E Y "
R611
R612
R61 3
R615
R616
R617
R618
56
56
56
56
56
56
56
LED601
LED604
LED605
LED606
LED60 7
LED613
LED614
7- 18
R614
R61 9
R62 0
R621
R622
R623
R624
56
56
56
56
56
56
56
LED602
LED603
LED608
LED609
LED610
LED615
LED616
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