LG H990ds Service Manual page 87

3.16.3 Sensor - Fingerprint Sensor
When Fingerprint sensor does not working, check fingerprint sensor IC and contact pin.
Checking Flow
START
Check the sensor function
Function is OK ?
No
Calibration OK ?
No
Change the sensor FPCB
Function is OK ?
No
Replace Main PCB
LGE Internal Use Only
YES
END
Yes
END
YES
END
Fingerprint Sensor FPCB
87
3. TROUBLE SHOOTING
Image
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