6+ pulling .50 and rebooting - GSM-Forum

alfyguy · 05-27-2017, 04:58

Hey everyone. I have a iPhone 6+ for data recovery. It had some water damage and corrosion near the camera connector. It also had a little bit near the NAND.
I cleaned it and removed all caps that looked shorted.
I currently get no signs of life but it does pull .50 amps and it reboots.
I checked 1.8v, 3v those are present. Vcc has no short.
Any ideas?

ctccellulaire · 05-27-2017, 07:57

Check U2 (Tristar) and Tigres (Charge IC)
0.50 current means something is bad near CPU
Regards
Adonis IRAQi

Sent from my SM-G935F using Tapatalk

alfyguy · 05-27-2017, 17:45

How could replacing those repair the issue if you say it's a CPU issue?

ctccellulaire · 05-27-2017, 18:25

Quote:

Originally Posted by alfyguy

How could replacing those repair the issue if you say it's a CPU issue?

Bro I said near CPU not Cpu itself

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alfyguy · 05-29-2017, 22:14

thanks I checked around the cpu I cannot find any shorts.. all caps look good. I removed u1580 there was some corrosion under that ic. i also removed u1502 but same results. with dc board I'm getting a short it is pugging .25mA.
any suggestions how can i go about finding this short?
I noticed BB cpu gets a little hot

abukuru · 05-30-2017, 04:01

Quote:

Originally Posted by ctccellulaire

Check U2 (Tristar) and Tigres (Charge IC)
0.50 current means something is bad near CPU
Regards
Adonis IRAQi

Sent from my SM-G935F using Tapatalk

Bro how do u know its near cpu????

Sent from my iPhone using Tapatalk Pro

05-27-2017, 04:58	#1 (permalink)
alfyguy Freak Poster Join Date: Dec 2010 Posts: 253 Member: 1481974 Status: Offline Thanks Meter: 42	6+ pulling .50 and rebooting Hey everyone. I have a iPhone 6+ for data recovery. It had some water damage and corrosion near the camera connector. It also had a little bit near the NAND. I cleaned it and removed all caps that looked shorted. I currently get no signs of life but it does pull .50 amps and it reboots. I checked 1.8v, 3v those are present. Vcc has no short. Any ideas?

05-27-2017, 07:57	#2 (permalink)
ctccellulaire Freak Poster Join Date: Dec 2014 Location: PCB Posts: 315 Member: 2320407 Status: Offline Thanks Meter: 88	Check U2 (Tristar) and Tigres (Charge IC) 0.50 current means something is bad near CPU Regards Adonis IRAQi Sent from my SM-G935F using Tapatalk

05-27-2017, 17:45	#3 (permalink)
alfyguy Freak Poster Join Date: Dec 2010 Posts: 253 Member: 1481974 Status: Offline Thanks Meter: 42	How could replacing those repair the issue if you say it's a CPU issue?

05-29-2017, 22:14	#5 (permalink)
alfyguy Freak Poster Join Date: Dec 2010 Posts: 253 Member: 1481974 Status: Offline Thanks Meter: 42	thanks I checked around the cpu I cannot find any shorts.. all caps look good. I removed u1580 there was some corrosion under that ic. i also removed u1502 but same results. with dc board I'm getting a short it is pugging .25mA. any suggestions how can i go about finding this short? I noticed BB cpu gets a little hot