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iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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08-24-2019, 03:09 | #1 (permalink) |
Junior Member Join Date: May 2019 Location: usa
Posts: 15
Member: 2911332 Status: Offline Thanks Meter: 2 | iphone 7, not charging, working from battery If I remove the battery, and measure the voltage on the battery terminals there's voltage pulsing about 2x a second (tigris is trying to output 3.8v but shuts down). There's no obvious short on the battery line or pp_vdd_main PP5v0_USB is ok at 5v Tigris_LDO is pulsing I replaced tigris, tristar, and tried a new dock flex to no change. What could cause Tigris output to pulse other than a short on the power line(s) considering the phone is working fine off a battery? Perhaps I missed a short on some secondary supply line? |
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