iPhone 6s card changing slot Nand blows Open, causing Won't Turn On fault maintenance

iPhone 6s card changing slot Nand blows Open, causing Won’t Turn On fault maintenance

Machine model: iPhone 6s

Fault symptom: Won’t Turn On

Maintenance process: the shrapnel in the iPhone 6s card slot is broken, and the card is not read. The colleague took it and blew it. As a result, the card slot was not well done, and no booting was damaged. Show me that it can be turned on without displaying, power on and see if the current is 100. Make it clear to the customer that it is no booting status, and quote separately for troubleshooting. If Update System is not Keep data, we can start work after communication. Try it first, it can be online, DFU mode, It should be that the card blowing slot blew too hard, and Nand was blown to Inveracious Soldering, but Update System was not carried out at first.

iPhone 6s card changing slot Nand blows Open to cause Won’t Turn On failure maintenance Figure 1.

When Nand is removed, it is found that a useful point A5 pin is missing, and Nand can be supplemented with UV curable from the flying root line on the side Capacitor.

iPhone 6s card changing slot Nand blows Open to cause Won’t Turn On failure maintenance Figure 2.

There is no problem in the test rack on Nand. Re-test REBALLING. Before installing Nand, it is customary to hit diode value at the bottom of the board first, and make sure that it is installed without any problem. After powering on and starting up, the system will enter normally.

Next, deal with the card slot. Basically, it is difficult to disassemble the card slot, and it is easy to install it. To disassemble the card slot, you can first open several fixed pin together with SMD REWORK STATION Hand solder, or you can take good professional scissors and cut off the shell a little bit.

iPhone 6s card changing slot Nand blows Open to cause Won’t Turn On failure maintenance Figure 3.

Because the original card slot has been damaged, to use the disassembly card slot, you can choose a waste motherboard to blow off from the back at high temperature, which can ensure that the black glue inside the card slot is in good condition.

The card slot is well aligned with each pin bit, and it is pressed and blown with tweezers. I use Solder(138℃), so blowing from the front will not affect Nand on the back. After loading the card test, the card reading signal calls are normal. By the end of this maintenance.