Required tools for repair

• JCID V1SE or V1S Pro Programmer: A main programmer device to read and write Face ID data.
• JCID Dot-matrix Detection Board: A module that attaches to the programmer to work with the dot projector.
• JCID Replacement Flex Cable: The new dot projector flex for the iPhone 13 or 13 Pro/Pro Max, which connects to the programmer for data writing. 

Repair method: Tag-on vs. IC chip

Tag-on flex cable

• How it works: This is a solder-free option. The new “tag-on” flex connects to the existing original flex cable. You use the JCID programmer to read data from the original dot projector and write it to the new tag-on flex cable.
• Best for: Technicians who prefer not to do microsoldering and want a faster repair process. 

IC chip replacement

• How it works: In this method, a new JCID replacement chip is soldered directly onto the original flex cable. The JCID programmer is then used to transfer the necessary Face ID data to the new chip.
• Best for: Experienced technicians who are comfortable with microsoldering. This method can sometimes be more stable and durable. 

The repair process

1. Read the original data: The technician connects the original dot projector module to the JCID programmer and reads the encrypted Face ID data, saving it to the programmer.
2. Attach the new flex:
   • For tag-on: The new tag-on flex cable is connected to the original.
   • For IC replacement: The original IC is removed and the new JCID IC is soldered to the original flex.
3. Write the data: The saved Face ID data is written from the programmer onto the new JCID flex cable or chip.
4. Install the component: The repaired dot projector flex is installed back into the iPhone.
5. Test Face ID: The technician verifies that Face ID is fully functional by setting up a new face on the device. 

Important considerations

• Professional repair only: This is not a DIY repair. It requires specialized tools and expertise. Attempting this without the right equipment or skills can permanently disable Face ID.
• True Tone compatibility: Note that True Tone function is sometimes tied to the screen and may require a separate repair if affected.
• Solder vs. solder-free: Choose the tag-on (solder-free) or IC replacement (microsoldering) method based on your comfort level with small component soldering.