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| iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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01-24-2017, 16:49
| #1 (permalink) |
| No Life Poster  Join Date: Jul 2016
Posts: 536
Member: 2598526 Status: Offline Thanks Meter: 52 | IPhone 6S+ hangs at 30ma No more short on vcc_main but when power button pressed bench supply goes to 30ma and hangs never starts booting I can't find the CPU reset line in schematics to test. Is it called something else in the 6s series? |
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01-24-2017, 17:10
| #2 (permalink) |
| Freak Poster  Join Date: Jul 2008 Location: Earth
Posts: 171
Member: 813803 Status: Offline Thanks Meter: 120 | I will check for you tomorrow, but I had this issue before and I think the pmic was the reason. I know you replaced it, but try reball or replace another one again Sent from my iPhone using Tapatalk Pro |
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01-24-2017, 17:11
| #3 (permalink) | |
| No Life Poster Join Date: Jul 2016
Posts: 536
Member: 2598526 Status: Offline Thanks Meter: 52 | IPhone 6S+ hangs at 30ma Quote:
Funny you say that I just reflowed and same issue. The pmic in 6s are a pain to align perfectly. The pins are so close together. This is also the 2nd one I tried. First pmic was giving short too like original | |
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01-24-2017, 17:25
| #4 (permalink) |
| Freak Poster Join Date: Jul 2008 Location: Earth
Posts: 171
Member: 813803 Status: Offline Thanks Meter: 120 | Ok so not pmic, on schematic page 39, there is AP to BB/wlan/bt/Sh connections. Test voltages on these lines. Warning there are many netnames! Sent from my iPhone using Tapatalk Pro |
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01-24-2017, 17:28
| #5 (permalink) | |
| No Life Poster Join Date: Jul 2016
Posts: 536
Member: 2598526 Status: Offline Thanks Meter: 52 | IPhone 6S+ hangs at 30ma Quote:
I'm not seeing those on my schematic page 39. Are they reset lines or? Btw voltages at CPU, nand are all present | |
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01-24-2017, 17:32
| #7 (permalink) | |
| No Life Poster Join Date: Jul 2016
Posts: 536
Member: 2598526 Status: Offline Thanks Meter: 52 | Quote:
Will check. What does AP stand for? Also did you find what the reset lines are? | |
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01-24-2017, 17:49
| #8 (permalink) |
| No Life Poster Join Date: Jul 2016
Posts: 536
Member: 2598526 Status: Offline Thanks Meter: 52 | IPhone 6S+ hangs at 30ma All the voltages from u2000 on page 15 of schematics are present. With the exception of PP_GPU_SRAM but I think that'd only be present when the phone boots an image no? Should iTunes detect it currently? Because I have a USB amperage detector and it's showing 0 amps drawn. How could I force it into DFU without a home button? Screen doesn't have one Last edited by short_toground; 01-24-2017 at 18:06. |
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01-25-2017, 17:41
| #9 (permalink) |
| No Life Poster Join Date: Jul 2016
Posts: 536
Member: 2598526 Status: Offline Thanks Meter: 52 | Update: Noticed Tristar u2 chip was missing. Board must have had work done before. Installed one thinking there's a good chance but still didn't boot, same issue. Going to give back to customer |
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