Key Back Light - Samsung GT-B7702 Service Manual

Flow Chart of Troubleshooting

9-8. Key Back Light

Main Key LED does not work
Yes
No
Check the U504 related to
U504 pin A20 = "H"?
"KEY_POWER_ON"
Yes
No
U504 pin A20 = 3.3V ?
Change U504
Yes
END
9-17
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization