Rep: 1
1
2
my iphone does not charge i want
to measure each prong of battery terminal
in iphone 4.how can test and measure the
battery terminal. how much the voltage
of 4 prongse have to be?
thanks
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Rep: 783.4mil
1.1mil
893
2.3mil
tushmanluuu, you only measure the outside contacts. You should expect to get at 4.6 V or better on there.
Not sure if this is the jumper diagram you were looking for.
Here is the diagram for which connector does what:
If it is not charging, check the USB power fuses and the USB power IC (that can only be done through either reballing or replacing the BGA IC)
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how can use jumper for battery connector
I am a little confused about the jumper. What type of jumpers are you looking for?
i mean when battery is diconnected
measure the voltage of terminal pads
to see if conections are fine .i know there
is + and - pads but whitch one is witch
i 've seid i have charging and rebooting
problem ,i think maybe ther is other faulty
parts like power ic ,fuse etc.
thanks for answering.
Hope the added diagram will help further. Thank you for accepting my answer.
I have the two middle contacts missing on the logic board.
If I use jumper leads can you tell me what the components are that are under the heat shield?
How tolerant are they to heat.
Thanks
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Dave1961, if you post an image of the components in question, I might be able to find that information. With any logic board repair, you should only heat the board twice, once to desolder and once to resolder. It does require experience and good tools to solder properly.
there are 2 gold coloured circles behind 2 and 3, you can just bridge between the battery connector and the gold coloured pads, it will do the same as using jumper cables to the board. if you look very closely there is a track on the board from the original pad and the gold coloured pads
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