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8. Level 3 Repair
8-4-11. Proximity/Ambient Light sensor
Pro Ambient Light Sensor does not work
Yes
No
Yes
No
Check the voltage
L5100, C5200 =3.4V
No
Replace U10002
Check the voltage
L5101, R5100, C5203, C5204
=1.8V
Yes
No
No
Replace U5011
Check U5100
’s package, smd status
(crack, open, short, etc.)
No
Yes
No
Replace U5100
Yes
No
END
Check U5101
’s package, smd status
(crack, open, short, etc.)
No
Replace U5101
Check R5102 R5103
(I2C is OK?)
No
Yes
No
Replace U5100,U5101
(If there is still problem, replace
UCP5000)