iPhone 7 Charging and Conectivity Mystery need advice! - GSM-Forum

4dbz333q · 01-28-2020, 16:08

Hello guys hopping someone can help me with iphone 7 not charging issue.
So beginning is that device loads with new battery but is sucked on apple logo, I can tell that it's on because home button reacts to press and device vibrates. To eliminate charging ic i changed it but nothing changed. All power lines are checked like VDD_MAIN gets 4.2V, USB_5V0, Tigris_to_battery_SWI_1V8, PP1.8_SDRAM, these lines are fine and gets correct voltage. Only battery connector voltage is strage. it gets 3.7V stays for like 1-2sec and then power cycles from 3.7V to 0V and back to 3.7V. So just to try i changed Tigris IC with Q2101 mosfet but story is still same. Maybe some one saw similar case and could help me to figure it out what can be faulty on this device, No water damage or something like that, no components looks missing. Thanks in advance!!!

phryne · 02-19-2020, 07:47

what about the USB IC?

01-28-2020, 16:08	#1 (permalink)
4dbz333q Junior Member Join Date: Feb 2017 Posts: 1 Member: 2684342 Status: Offline Thanks Meter: 0	iPhone 7 Charging and Conectivity Mystery need advice! Hello guys hopping someone can help me with iphone 7 not charging issue. So beginning is that device loads with new battery but is sucked on apple logo, I can tell that it's on because home button reacts to press and device vibrates. To eliminate charging ic i changed it but nothing changed. All power lines are checked like VDD_MAIN gets 4.2V, USB_5V0, Tigris_to_battery_SWI_1V8, PP1.8_SDRAM, these lines are fine and gets correct voltage. Only battery connector voltage is strage. it gets 3.7V stays for like 1-2sec and then power cycles from 3.7V to 0V and back to 3.7V. So just to try i changed Tigris IC with Q2101 mosfet but story is still same. Maybe some one saw similar case and could help me to figure it out what can be faulty on this device, No water damage or something like that, no components looks missing. Thanks in advance!!!

02-19-2020, 07:47	#2 (permalink)
phryne Freak Poster Join Date: Jun 2017 Location: USA Posts: 207 Member: 2730637 Status: Offline Thanks Meter: 101	what about the USB IC?