Samsung SM-A507FN Service Manual page 83

8. Level 3 Repair
8-4-8-5. Fingerprint Sensor
Fingerprint Sensor does not work
Do you change Octa or Main
PCB or Finger sensor?
Check Finger sensor
Connector. Is it broken?
Check the Fingerprint Sensor
SPI Line and VCC 3.3V.
(They are OK?)
Replace the Fingerprint sensor module
And Calibration
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Yes
No
No
No
Yes
No
Yes
No
END
YES
YES
Replace Finger Sensor
No
Replace Main FPCB
Do calibration.