Table of Contents
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Flow Chart of Troubleshooting
7-11. Key Back Light
Main Key LED d o es not work
U716 pin 1 = H ?
U716 pin 4 = H ?
typical 3.8V
VBAT
KEYLED_ON
C753
Yes
Yes
Yes
END
+VDD_BL
U716
5
1
STBY
SEL
2
4
GND
VOUT
3 VIN
GND
6
C754
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used with
No
Check the U716 related to " K EYLED_ON"
No
7-20
out Samsung' s authoriz a tion
signal
Replace U716
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