Phone · Google · Pixel 4 XL
Google Pixel 4 XL Titan Security Chip Repair
Titan Security Chip Repair guide for the Google Pixel 4 XL
Before you begin
Tools
- Heat gun
- T3 Torx screwdriver
- Plastic opening picks
- Spudger
- Tweezers
- Microscope
- Hot air station
- Soldering iron
Parts / materials
- Isopropyl alcohol (99%)
- No-clean solder flux
- Desoldering wick
- Titan M Security Chip replacement
- Pre-cut back glass adhesive
Safety
- Wear safety glasses when using hot air and soldering equipment.
- Perform soldering in a well-ventilated area or use a fume extractor.
- Disconnect the battery immediately after opening to prevent electrical shorts.
Overview
Step-by-step
- 1
Heat the rear glass panel
3 minApply heat evenly around the outer edges of the rear glass using a heat gun set to 80°C for approximately two minutes.
- 2
Slice rear glass adhesive
5 minInsert a thin plastic opening pick into the seam near the bottom edge and slide it around the perimeter to slice through the adhesive.
- 3
Remove the back glass
2 minGently lift the back glass panel off the chassis and set it aside on a clean surface.
- 4
Unbolt the midframe screws
4 minUse a T3 Torx screwdriver to remove the 10 screws securing the wireless charging coil and upper midframe shield.
- 5
Detach the midframe assembly
2 minPry up the midframe assembly using a flat spudger and lift it off the motherboard.
- 6
Disconnect the battery cable
1 minInsert a spudger under the battery connector and lift straight up to disconnect power from the motherboard.
- 7
Disconnect motherboard flex connectors
3 minPry up the display cable, rear camera, front camera, and lower board interconnect press connectors using a plastic spudger.
- 8
Remove motherboard retention screws
2 minUnscrew the T3 Torx screws holding the motherboard inside the phone frame.
- 9
Lift out the motherboard
2 minCarefully remove the motherboard from the frame and secure it into an anti-static PCB holder.
- 10
Apply flux to the Titan Security Chip
2 minLocate the Titan M Security Chip under a microscope and apply a small drop of no-clean liquid flux along its edges.
- 11
Desolder the Titan Security Chip
5 minHeat the Titan M chip with a hot air station set to 350°C and lift it off the board with fine-tip tweezers once the solder melts.
- 12
Clean motherboard contact pads
4 minApply flux and use a desoldering wick with a soldering iron to clear residual solder from the motherboard pads, then clean with isopropyl alcohol.
- 13
Align the replacement Titan Security Chip
3 minApply fresh flux to the clean pads and position the replacement Titan M chip precisely according to pin 1 orientation markings.
- 14
Solder the Titan Security Chip in place
5 minDirect hot air at 330°C over the chip until it reflows into place and seats evenly onto the pads.
- 15
Reinstall motherboard into chassis
3 minPlace the cooled motherboard back into the frame and secure it with the saved T3 Torx screws.
- 16
Reconnect battery and seal device
5 minReconnect all flex cables including the battery, reinstall the midframe, and press new back glass adhesive to seal the phone.
After your Google Pixel 4 XL titan security chip repair
Power the Pixel 4 XL back on and test the titan security chip 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 Google Pixel 4 XL job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more Google Pixel 4 XL repair context in the encyclopedia, or open related DIY guides.
