Samsung SM-G975F Service Manual page 96

8. Level 3 Repair
8-4-8-9. Fingerprint Sensor
Fingerprint Sensor does not work
Check the Dispaly connector
on Main PBA
Check the voltage
C12030, C12031 = above 3.4V
C12043 = 1.8V
Check the Fingerprint Sensor
MISO, MOSI, CLK, CS_N Pins
(SPI is OK?)
Replace the UB module
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung's written authorization is strictly prohibited.
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
END
No
Reconnect the HDC12000
No
No
Check L12010
Replace U12002
Replace UCP5000