Iphone 11 Pro Max Face Id Not Working Repair Repair Guide

Difficulty

Difficult

Steps

13

Time Required

                          1 hour            

Sections

1

• iPhone 11 Pro Max Face ID Not Working Repair
• 13 steps

Flags

4

Grammar Police

Embrace your inner English teacher and help improve this guide’s grammar!

Bullets!

Better coordination with markups and the color/type of bullets will help make this guide more clear!

In Progress

This guide is a work in progress. Reload periodically to see the latest changes!

Member-Contributed Guide

An awesome member of our community made this guide. It is not managed by iFixit staff.

• BackiPhone 11 Pro Max

• Full Screen

• Options

• History

• Save to Favorites

• Download PDF

• Edit

• Translate

• Get Shareable Link

• Embed This Guide

• Notify Me of Changes

• Stop Notifications

Introduction

Step 1

              iPhone 11 Pro Max Face ID Not Working Repair               

• Go to Settings > Face ID & Passcode > Set Up Face ID. When trying to set up Face ID, “Move iPhone a little lower/higher” pops up. Face ID cannot be normally set up. It can be judged that the dot projector of the Face ID has malfunctioned.
• Remove the display and then detach the Face ID module. We can see a red mark, which indicates that the phone has water damage.

Go to Settings > Face ID & Passcode > Set Up Face ID. When trying to set up Face ID, “Move iPhone a little lower/higher” pops up. Face ID cannot be normally set up. It can be judged that the dot projector of the Face ID has malfunctioned.

Remove the display and then detach the Face ID module. We can see a red mark, which indicates that the phone has water damage.

1024

Step 2

• Connect the dot projector flex cable with the I2C Repair Programmer. The test shows that the dot projector flex cable has malfunctioned.
• Press “Read” and read the data from the dot projector flex cable.
• Connect a new I2C iPhone 11 Pro Max flex cable to the programmer. Press “Write” and write the data that has been read on the new flex cable.

Connect the dot projector flex cable with the I2C Repair Programmer. The test shows that the dot projector flex cable has malfunctioned.

Press “Read” and read the data from the dot projector flex cable.

Connect a new I2C iPhone 11 Pro Max flex cable to the programmer. Press “Write” and write the data that has been read on the new flex cable.

Step 3

• Dip a small amount of UV Adhesive on the crystal of the dot projector flex cable and solidify it with UV Lamp. This step is aimed to fix the crystal.
• Remove the foam on the back of the dot projector.

Dip a small amount of UV Adhesive on the crystal of the dot projector flex cable and solidify it with UV Lamp. This step is aimed to fix the crystal.

Remove the foam on the back of the dot projector.

Step 4

• To make positioning easier while assembly, mark the module with Sculpture Knife.
• Since the dot projector flex cable is under the metal plate, lift the metal plate to remove the flex cable.

To make positioning easier while assembly, mark the module with Sculpture Knife.

Since the dot projector flex cable is under the metal plate, lift the metal plate to remove the flex cable.

Step 5

• Attach the Face ID module to the Holding Fixture and grind the welding position of the metal plate.
• Insert the pry knife into the gap between the dot projector module and the crystal.

Attach the Face ID module to the Holding Fixture and grind the welding position of the metal plate.

Insert the pry knife into the gap between the dot projector module and the crystal.

Step 6

• Heat with Hot Air Gun at 150℃ and remove the dot projector flex cable.
• Heat with Hot Air Gun at 320℃ and detach the dot projector module.

Heat with Hot Air Gun at 150℃ and remove the dot projector flex cable.

Heat with Hot Air Gun at 320℃ and detach the dot projector module.

Step 7

• Attach the dot projector module to the Holding Fixture. Heat with Hot Air Gun at 320℃ and take out the MOSFET.
• Apply a small amount of Solder Paste to the bonding pad with Soldering Iron at 365℃. Jump wire between pin 2 and pin 3 of the MOSFET with 0.02mm copper wire.

Attach the dot projector module to the Holding Fixture. Heat with Hot Air Gun at 320℃ and take out the MOSFET.

Apply a small amount of Solder Paste to the bonding pad with Soldering Iron at 365℃. Jump wire between pin 2 and pin 3 of the MOSFET with 0.02mm copper wire.

Step 8

• Attach the dot projector module to the holder. To clean the tin on the dot projector module, smear rosin with Soldering Iron at 365℃ and solder-wick.
• Clean the module with PCB Cleaner afterward. Heat with Hot Air Gun at 240℃ and remove residual adhesive with tweezers.

Attach the dot projector module to the holder. To clean the tin on the dot projector module, smear rosin with Soldering Iron at 365℃ and solder-wick.

Clean the module with PCB Cleaner afterward. Heat with Hot Air Gun at 240℃ and remove residual adhesive with tweezers.

Step 9

• Get the new flex cable. Put the Reballing Stencil in the right position and apply some medium-temperature Solder Paste evenly.
• Heat with Hot Air Gun at 320℃ and remove the Reballing Stencil after the flex cable has cooled.

Get the new flex cable. Put the Reballing Stencil in the right position and apply some medium-temperature Solder Paste evenly.

Heat with Hot Air Gun at 320℃ and remove the Reballing Stencil after the flex cable has cooled.

Step 10

• Heat with Hot Air Gun at 320℃ again and apply a small amount of Paste Flux to the flex cable.
• Fix the flex cable to the holder and align the dot projector module.

Heat with Hot Air Gun at 320℃ again and apply a small amount of Paste Flux to the flex cable.

Fix the flex cable to the holder and align the dot projector module.

Step 11

• Solder with Hot Air Gun at 320℃.
• Connect the flex cable that has been soldered to the I2C programmer. Press “Test” and the screen shows “Pass” which indicates that the flex cable is normal.
• Attach the flex cable to the Holding Fixture and put the dot projector flex cable in position.

Solder with Hot Air Gun at 320℃.

Connect the flex cable that has been soldered to the I2C programmer. Press “Test” and the screen shows “Pass” which indicates that the flex cable is normal.

Attach the flex cable to the Holding Fixture and put the dot projector flex cable in position.

Step 12

• Apply a small amount of 460 Adhesive between the dot projector module and the crystal.
• Once the adhesive has set, arrange the flex cable.

Apply a small amount of 460 Adhesive between the dot projector module and the crystal.

Once the adhesive has set, arrange the flex cable.

Step 13

• Install the flex cable on the phone. Boot up the phone, and go to Face ID settings. Face ID is set up normally and unlocks normally. The fault is cleared.

Install the flex cable on the phone. Boot up the phone, and go to Face ID settings. Face ID is set up normally and unlocks normally. The fault is cleared.

Please stay tuned for more content.

Cancel: I did not complete this guide.

                                                                                      2 other people completed this guide.                                             

Author

                                      with 2 other contributors 

                    REWA                     

Member since: 11/24/2020

11,219 Reputation

                                      53 Guides authored                  



                       Badges:
                       14







                                                        +11 more badges