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Flow Chart of Troubleshooting
7-10. Key Back Light
Main Key LED does not work
U606 pin3 = H ?
VBAT
C622
KEY_LED_ON
R607
Yes
Yes
END
U606
3
VIN
VOUT 4
2
GND
5
NC
1 STBY
GND
6
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No
Check the U200 related to " V DD_KEY "
R611
R612
R613
75
75
75
LED601
LED602
LED600
7-22
R614
R615
R616
R618
R619
75
75
75
75
75
LED603
LED604
LED605
LED606
LED607
KEY_LED
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