Phone · Samsung · Galaxy S20 Ultra
Samsung Galaxy S20 Ultra Fingerprint Sensor Repair
Fingerprint Sensor Repair guide for the Samsung Galaxy S20 Ultra
Before you begin
Tools
- Heat gun or iOpener
- Suction cup
- Plastic opening picks
- Phillips #00 screwdriver
- Plastic spudger
- Precision tweezers
Parts / materials
- Replacement Galaxy S20 Ultra fingerprint sensor
- Pre-cut back glass adhesive sticker
- 99% isopropyl alcohol
- Cotton swabs
Safety
- Wear safety glasses when heating glass to protect against sharp fragments.
- Disconnect the battery before touching internal motherboard components to avoid shorts.
- Do not puncture or bend the internal lithium-ion battery during disassembly.
Overview
Step-by-step
- 1
Heat the Back Glass
2 minApply a heated iOpener or heat gun around all edges of the back glass for two minutes to soften the strong adhesive.
- 2
Attach Suction Cup
2 minPlace a suction cup near the bottom edge of the back glass and pull upward firmly to create a slight gap.
- 3
Slice Back Glass Adhesive
4 minInsert an opening pick into the gap and slowly slide it around the perimeter to sever the perimeter adhesive.
- 4
Remove Back Glass
2 minLift the rear glass panel away from the frame and set it aside on a clean surface.
- 5
Unscrew Midframe Assembly
3 minUnscrew the 15 Phillips #00 screws securing the wireless charging coil and lower speaker cover.
- 6
Detach Wireless Charging Coil
2 minGently lift the wireless charging coil and NFC assembly off the motherboard and frame.
- 7
Disconnect Battery Cable
1 minUse a plastic spudger to pry the battery press connector straight up from its motherboard socket.
- 8
Remove Loudspeaker Module
2 minPry the lower loudspeaker assembly out of the chassis to expose the bottom sub-board.
- 9
Disconnect Fingerprint Sensor Cable
1 minUnplug the fingerprint sensor ZIF or press connector attached to the sub-board using a spudger.
- 10
Warm Lower Display Glass
2 minApply mild heat to the front lower display area for 60 seconds to soften the adhesive holding the ultrasonic sensor.
- 11
Pry Damaged Sensor Module
3 minCarefully slide thin tweezers underneath the sensor body to separate it from the inner screen housing.
- 12
Clean Housing Recess
2 minMoisten a cotton swab with isopropyl alcohol and wipe away remaining glue from the sensor bracket area.
- 13
Install New Fingerprint Sensor
3 minPeel the protective backing off the new ultrasonic sensor and seat it securely inside the frame recess.
- 14
Attach Sensor Flex Cable
1 minAlign and press the new fingerprint sensor flex connector firmly onto the socket until it clicks.
- 15
Reinstall Loudspeaker Assembly
2 minPlace the lower loudspeaker module back into the frame slot and press down to snap it in place.
- 16
Reconnect Battery Cable
1 minAlign the battery flex connector over its terminal and snap it down firmly.
- 17
Reattach Wireless Charging Shield
3 minLay the wireless charging pad back over the motherboard and reinstall the 15 Phillips #00 screws.
- 18
Reseal Back Glass
3 minApply pre-cut replacement adhesive along the frame borders and firmly press the back glass panel down.
After your Samsung Galaxy S20 Ultra fingerprint sensor repair
Power the Galaxy S20 Ultra back on and test the fingerprint sensor repair function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Samsung Galaxy S20 Ultra job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more Samsung Galaxy S20 Ultra repair context in the encyclopedia, or open related DIY guides.
