The latest iPhone has been released for a while, and there are some problems come with that. But, today, we're not talking about it. Let's take care of the old iPhone. The iPhone 6 Plus, which has some problems, the touch function, the camera, the LCD screen, and so on. Now, Vip Pro Shop Team will introduce the troubles and show the repair guide step by step.
The iPhone occasionally appear touch
failure or jump randomly before dropping, it can return to normal after press
switch. When repair touch IC, the iPhone 6 Plus fell to the ground, the bottom right corner of
the touch screen glass is broken, and the front camera turned black, but the iPhone
still can be used. A few days ago, when turn it on; the screen is blurry when
the white Apple LOGO appears and it can't enter the IOS. Now, it can't boot, and the current is 150mA.
GPS antenna was broken and now it shows GPS signal is weak when moving.
Repair guide
Remove the motherboard (picture 7-3-1), it
is shocking to us. The touch IC and WiFi chip have been repaired, it doesn't matter, and we can fix it by replace
the new chip. The most important problem is the capacitance resistor and
inductor of back socket was empty solder. As shown in picture 7-3-2.
A row of resistors and capacitance, also
have bad chips, it's really a headache. Connect motherboard to DC power supply , the current jumps between 70mA and 120mA. The failure is as
follows:
1. The CPU was missing solder
2. Touch jump wire
3. Camera
4. Other problems caused by CP
First repair CPU, omit the process, the
result is shown in the picture 7-3-3.
After repair CPU, power on iPhone and test
it, there still have many diode data of socket are abnormal, and we directly remove
it and re-fill it under the stereo microscope, as shown in picture 7-3-4. When we remove it, we can find
that the glue is gone, but the glue on normal motherboard small components
won't drop.
After dealing with these, test it again,
still no display. Now, we can only do it step by step. Measuring display power
supply, all is normal. Measure the resistance of the display socket, we found
there is no 5.7V power supply, but when measuring the voltage behind it, it is
present, so we suspect that it is disconnect. After measurement, it's really
disconnected. Solder jump wire as show in picture 7-3-5 and 7-3-6.
After jump wire, test it, the display back
to normal, but the touch function doesn't work. Solder jump wire with soldering station to fix touch MI pin, as show in picture 7-3-7.
After soldering the jump wire and chip,
enter the IOS and test it, there still have a problem with the front camera,
and there is a vertical bar where the rear camera takes pictures. The problem
of rear camera is caused by camera 2.5V power supply direct connect and PVCCMAN
short connect. As shown in picture 7-3-8.
The problem with the front camera is that
the inductor is connected directly to the lead, as shown in picture 7-3-9.
Fill the missing components and measure the
resistance data, we found that the value of the front complement element has 10
Ohms difference. Power on and test it, both of the rear and front camera are
normal. But the deviation of the front camera resistance may cause by CPU, now is good, maybe it will be damaged
after a period of use.
Finally, the problem of the iPhone 6 Plus
has been solved, as shown in picture 7-3-10.
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