Samsung SM-A205FN Service Manual page 106

8. Level 3 Repair
8-4-7-2. Proximity sensor
Proximity Sensor does not work
Check the voltage
C3102 =1.8V
Check R3004, R3003
(crack, open, etc.)
Check U3016
(crack, open, etc.)
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Yes
Yes
Yes
Yes
END
No
Abnormal
Abnormal
Replace U3013
Replace R3003, R3004
Replace U3016