iPhone 12 Pro Repair Process Sharing
Received a seriously drop-damaged iPhone 12 Pro, the situation as below
- The screen and glass back cover is cracked
- The camera module is damaged
- The motherboard separated
The phone owner wants to keep the data in the phone.
Troubleshooting
Disassemble the phone then take out the motherboard, it was separated by the drop damage already.
- The pads on the middle layer are missing
- The motherboard also has gotten deformed
- The CPU, NAND chip, and Logic EEPROM looks good from the appearance
So the only possible repair method is to swap the encrypted chips to another donated motherboard.
Repair Process
- Remove the NAND chip and CPU carefully from the motherboard
2. Remove the Logic EEPROM, since this chip is easy to crack and very small. Be careful when removing this little chip, do not hold with too much force, and pay attention to the airflow to avoid the chip being flowed away.
3. Solder the Logic EEPROM, NAND chip, and CPU to the new donated motherboard.
Fo the NAND chip
we need to remove the black glue first with a special knife and the hot air gun.
Then reball the pads on the chip, to ensure each pad is smooth and clean.
For the CPU
we also need to remove all the residual glue patiently with a specific knife
Then reball and ensure each pad on the CPU is clean and smooth
Then well align and solder back the NAND and CPU chip
For the detailed soldering and handworking process, you can visit REWA Academy to learn the details
Step 4. Trigger to boot with the signal board only, the boot current is normal. This means the CPU and the NAND chip are in good condition.
Step 5. Later we plan to connect with Wi-Fi to back up the data, so the Wi-Fi module should be swapped to the signal board too.
- Heat and remove the Wi-Fi module chip
- Clean and reball the Encrypted Wi-Fi module
- Solder it to the new board
Step 6. Recombine the two layers of the motherboard by the heating platform
Step 7. Assemble the phone, then connect with Wi-Fi to back up the data
Stay tuned to the REWA Academy to learn more tips and skills of iPhone 12 Pro Repair.
