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  1. #1
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    iPad A1458 low ppvcc_main?

    Hey I was wondering if anyone out there has an 820-3249-A out of an iPad 4th Generation A1458. This board has no liquid damage not sure if I'm dealing with a bad battery. I have no good parts to test with as this is my first iPad to set eyes on. I'm getting a rather low diode reading on ppvcc_main of .141 v. Can anyone tell me if this is on par or not? This ipad just showed some blue on the screen and then went dead. No signs of life since. Thanks for the info in advance.

    Mark

  2. #2
    Junior Member
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    Sep 2016
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    Re: iPad A1458 low ppvcc_main?

    Well since no one on this board has this info apparently I'm going to put it out there. I got my hands on a known good working ipad and that is a good reading on ppvcc_main. Here are some other reading I gathered off of this ipad.

    PPVCC_MAIN = .135
    PP1V1_CPU0_FET = .452
    PP1V1_CPU1_FET = .450
    PP1V1_SRAM = .282
    PP1V2_SOC = .034
    PP3V3_OUT = .361

 

 

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