Samsung SM-G975F Service Manual page 92

8. Level 3 Repair
8-4-8-5. Proximity sensor
Proximity Sensor does not work
Check the voltage
L5059, C5086 =1.8V
(Sensor's IO voltage)
Check the voltage
L5058, C5084=3.4V
(Sensor's LED voltage)
Check R5004, R5005
Check U5005
(crack, damaged, etc.)
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Yes
No
Yes
No
Yes
No
(I2C is OK?)
Yes
No
Yes
No
END
No
No
No
Abnormal
Replace U5006
Replace U10002
Replace U5002
Replace U5005