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현재 버전 게시자: Josh White ,

제목:

Can someone explain how to test a PCB for short circuit?

본문:

Hello again ifixit,

Trying to begin repairing some water damaged/ no power phones here. iPhone 5/5c/5s. Can anyone point me in the right direction of diagnostics for a water damaged board? I'm really not sure how to find a short, or an open trace as I have no idea where on the board to measure voltages. Are there schematics out there that show all the correct voltages? I have not been able to find any.

I guess the first part I want to know is, should there be continuity between the battery terminals on an iPhone 5/5c/5s board? I've seen people talking about that as a way to find if you board is shorted, is there any value to this? I also read about hooking up an external power source(low voltage, high current) and then replacing whichever components start overheating.

I guess I just need to know where to go to start making sense of these units with no signs of life. Its a mess at the moment. Thanks in advance

기기:

iPhone 5s

현황:

open

승인된 답변:

244616

편집 작업: Josh White ,

제목:

Can someone explain how to test a PCB for short circuit?

본문:

Hello again ifixit,
Hello again ifixit,
 
Trying to begin repairing some water damaged/ no power phones here. iPhone 5/5c/5s. Can anyone point me in the right direction of diagnostics for a water damaged board? I'm really not sure how to find a short, or an open trace as I have no idea where on the board to measure voltages. Are there schematics out there that show all the correct voltages? I have not been able to find any.
 
I guess the first part I want to know is, should there be continuity between the battery terminals on an iPhone 5/5c/5s board? I've seen people talking about that as a way to find if you board is shorted, is there any value to this? I also read about hooking up an external power source(low voltage, high current) and then replacing whichever components start overheating.
 
I guess I just need to know where to go to start making sense of these units with no signs of life. Its a mess at the moment. Thanks in advance

기기:

iPhone 5s

현황:

open

원문 게시자: Josh White ,

제목:

Can someone explain how to test a PCB for short circuit?

본문:

Hello ifixit,

Trying to begin repairing some water damaged/ no power phones here. iPhone 5/5c/5s. Can anyone point me in the right direction of diagnostics for a water damaged board? I'm really not sure how to find a short, or an open trace as I have no idea where on the board to measure voltages. Are there schematics out there that show all the correct voltages? I have not been able to find any.

I guess the first part I want to know is, should there be continuity between the battery terminals on an iPhone 5/5c/5s board? I've seen people talking about that as a way to find if you board is shorted, is there any value to this? I also read about hooking up an external power source(low voltage, high current) and then replacing whichever components start overheating.

I guess I just need to know where to go to start making sense of these units with no signs of life. Its a mess at the moment. Thanks in advance

기기:

iPhone 5s

현황:

open