Is your iPhone 7 not charged? Confused about that? Here! You can get the iPhone 7 cannot charge repair guide!
Pick up an iPhone 7 and measure it with Fluke 15B+ Digital Multimeter, the result is that the single side displays charging but actually no power gets in, the other side is no display and no no power gets in.
Firstly,
take an iPhone 7 charging port to replace, we need to
exclude the possibility of faulty external spart parts.
After
replacing the charging port, the same problem still exists, the single side has
diplay but no electricity. Next,
disassemble the iPhone to replace chip, this problem is generally caused by iPhone USB charge IC.
Remove
the screen we find the fingerprint inside, it is same after the replacement of
charging port parts. Disassemble the iPhone 7 motherboard to find the USB management chip motherboard, we
do not know which chip it is, so now take iPhone 7schematic diagram directly, we search the 1610 and find the part soon, as
shown in picture 10-5-2 .
Read
the point bitmap and quickly located to U4001. . As the
shield covers the chip, apply the nail clipper directly.
Now
dismantle directly with high temperature and fast speed, it should be done in
10 seconds.
Open
the DC power supply, we find the current is 700mA, then we change the side,
it can also be normally charged. Now there is 79% battery power, wait a minute
to see if there is power get in then we will install it.
Check it after a few minutes, the percentage of iPhone battery charge increased. The repair ends!
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