Device wont actively track Battery %

Question

iPad Mini 1st Generation

Apple's 2012 first-generation 7.9-inch iPad mini, with 16, 32, or 64 GB of storage and an A5 processor.

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Scott @scott35006

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게시일: 2017년 2월 21일

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Device wont actively track Battery %

hey team! ive encountered an issue.

Theres an iPad im trying to fix that has an issue with actively readying the battery.

if the battery is at say 54% hypothetically when i turn the device on, it will not read another battery level, but if i turn the device off, then on again, it will read a new battery level.

I tried 2 new charge ports, and a new battery.

I would prefer to keep the data if at all possible, though i am aware there is potential that it could be software reload time. this is my last resort, and would like to try other things (boardwork) first.

Please answer if you have seen this issue before.

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

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예 아니요

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Scott , Just a thought, could you just not install a free battery app something like one below.

https://itunes.apple.com/us/app/battery-...

L Pfaff 의 2017년 2월 21일

3UTools if you want to check battery information via computer.

Ben 의 2017년 2월 21일

i would like to learn how to fix it. thanks though.

Scott 의 2017년 2월 23일

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Minho @refectio

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게시일: 2017년 2월 23일

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Hi Scott. Do you know if the battery you used to test is "known-good"?

Have you checked FL7500, right next to the battery connector? It is the only thing inline between the battery gas gauge and it's ultimate destination, the PMIC and the CPU. Normally a bad or missing FL7500 causes erratic readings but that would certainly be the right thing to check in your case.

Verify it's presence, good electrical connection and measure its resistance. At DC levels, it should read essentially zero. It only becomes resistive at high frequency to filter out noise.

Otherwise, you should do a full restore to eliminate any software issues.

UPDATE

Hopefully for you, the missing pad is the one in the red square. You can easily jump it to the cap right next to it or the connector pin. If it is the blue circle, well then you will have to very delicately scrape the board to get some of the copper via because it connects directly to the CPU and PMIC.

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if you could post an image of the board, and highlight its location, so i can do as suggested, or a schematic for me to read, i would appreciate it.

Scott 의 2017년 2월 23일

The schematic is widely available on the web. You may need to sign up to GSM-Forum. This is a very tiny component...do you have the right tools to do this?

Minho 의 2017년 2월 23일

i do board work on Samsungs regularily, im assuming it will be similar to that.

Scott 의 2017년 2월 23일

Yeah, then no worries. It's a 0201 SMD component.

Minho 의 2017년 2월 23일

component is not present. one of the traces are missing. do you know where i could jump the lead to?

Scott 의 2017년 2월 23일

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Scott , Just a thought, could you just not install a free battery app something like one below.

https://itunes.apple.com/us/app/battery-... — L Pfaff
3UTools if you want to check battery information via computer. — Ben
if you could post an image of the board, and highlight its location, so i can do as suggested, or a schematic for me to read, i would appreciate it. — Scott
The schematic is widely available on the web. You may need to sign up to GSM-Forum. This is a very tiny component...do you have the right tools to do this? — Minho
i do board work on Samsungs regularily, im assuming it will be similar to that. — Scott
component is not present. one of the traces are missing. do you know where i could jump the lead to? — Scott

iPad Mini 1st Generation

Device wont actively track Battery %

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