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8. Level 3 Repair
8-4-10. Proximity/Ambient Light sensor
Pro Ambient Light Sensor does not work
Yes
No
Yes
No
Check the voltage
L4104,C4114 =3.4V
No
Replace U9014
Check the voltage
L4103, L4105, C4004, C4112
=1.8V
Yes
No
No
Replace U7004
Check U4001
’s package, smd status
(crack, open, short, etc.)
No
Yes
No
Replace U4001
Yes
No
END
Check R5027, R5029
(I2C is OK?)
No
Replace U4005
(If there is still problem, replace UCP500)
