Chosen Solution
Hello. I have iPhone 6 Plus and I replaced tristar to it. Before repair I tested it with multimeter for how mutch USB cable give power to the battery bracket on logigboard
and the volt was 0.01v and with new tristar the battery bracket gived random volts wery fast 3.50v, 2.45v 1.20v etc. Do anybody have any ideas what is going on? Before repair iPhone wasn’t charging or warming at all and no powered on. Screen was black and still is. I have reflowed it without any results. Any help would be much appreciated. EDIT 01.08.2017 With new good battery and tristar reflowed once again the iPhone works again.
Is that with the battery plugged in? Maybe it isn’t sensing the gas gauge circuit and dropping the voltage.
1st the TriStar is not a charging IC it is a high speed switch that switches between vcc main/vccbatt it also switches cpu and baseband hence the name tri. Tigris is the charging IC. TriStar requires three voltages to function, a reverse gate handshake pin power in. If you have schematics and tools I will help you tomorrow when I am in work
I have iPhone 6s Plus Its never charges after 87%, charging very slowly and battery quickly draining What’s the reason for this problem? What I do? Update (01/22/2018) yes. I already charged 3 batteries and chacked but it’s never charged fully Never charging after 87%
