Advice on PCB repair iPhone 7. Anyone?
Question for someone a little more on the micro soldering / PCB repair side of things.
Re iPhone 7 (intel) - Attached photo of my measurements and notes.
Phone stuck in boot loop, not charging, not registering in itunes. Getting into repairs so trying to fix it but finding it a bit difficult to wrap my head around. Getting there thou.
Tried so many things, took diode measurements for J4502 and other parts. Went through PCB to try and find a short of a fault somewhere, no luck.
I did notice some strange readings on J4502 pin 24,26, 30, 32, 36, 38. Got double the reading I should of got up in the 800, supposed to be 485 for all.
This led me down the line on the iPhone schematics chart to L3901, L3902 and L3903. All those had way high readings in diode mode so does that mean they are all fried??
Will they lead a phone to boot-loop and not charge?
What other pins should I check that would relate to a phone behaving like this? Would it lead me to find the culprit which is responsible for this happening?
Is there a way I could test the AUDIO IC with a multi-meter to find out if it is responsible?
Or could it be the base band pmu? all the capacitors around it seem to be good when measured in diode mode.
Any advice from someone experienced would be greatly appreciated.
I am learning so much on this phone and am confident of finding the solution with a little help and guidance
P.S Just noticed C1403 is measuring only 0.04v. Thats too much resistance right? way too low. shouldnt it me about 0.350 - 0.450v? Please correct me if I’m wrong
Cette question est-elle utile ?