Recently, we got a iPhone 6 from our
customer, this iPhone 6 has some problem, it burned out when it was charging,
and it's been repaired, but it turned out to be a failure. We preliminary
judgment is USB management chip drop pins, as
shown in picture 6-81.
For those motherboard whose pins drops seriously, I have to replace it with other
workable motherboard. That is to say, remove all the major parts to other
workable motherboard. Find a iPhone 6 motherboard in picture 6-82.
Remove all the chips and tin them. First
solder main power supply, USB charge management chip, charge field tube,
NAND Flash and CPU and so on, as shown in picture 6-83.
Then turn it on and it can display
normally, as shown in picture 6-84. The previous parts are soldered normally.
Next I continue to remove the small parts.
After removing all the parts. Turn it on
and get into IOS to test. All the functions are normal. “about iPhone” can
display all the serial number, as shown in picture 6-85.
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