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Current version by: oldturkey03 (vote details) ,

Title:

current draw fluctuating when power button pressed

Text:

Hi , i have an iphone 5s which had a charging issue , i changed the U2 and it was working fine i charged battery fully and phone was ok .

I replaced the shields ,put the phone back together and it didnt work .

took it apart again and found U1600 looked a bit damaged ,  i thought i was careful but maybe i caught it when replacing the shields , anyway i have changed U1600 but still the same .

when connected to dc power the amps fluctuate (see this video)

[https://youtu.be/_knDmtpjeNA|5S no boot]

What does this indicate . ?

I have checked PP_BATT_VCC_CONN and its good 3.8 V

I thought on the schematic it listed the critical  voltage lines but i cant seem to find them .

Device:

iPhone 5s

Status:

open

Accepted Answer:

395157

Edit by: oldturkey03 (vote details) ,

Title:

current draw fluctuating when power button pressed

Text:

Hi , i have an iphone 5s which had a charging issue , i changed the U2 and it was working fine i charged battery fully and phone was ok .

I replaced the shields ,put the phone back together and it didnt work .

took it apart again and found U1600 looked a bit damaged ,  i thought i was careful but maybe i caught it when replacing the shields , anyway i have changed U1600 but still the same .

when connected to dc power the amps fluctuate (see this video)

[https://youtu.be/_knDmtpjeNA|5S no boot]

What does this indicate . ?

I have checked PP_BATT_VCC_CONN and its good 3.8 V

I thought on the schematic it listed the critical  voltage lines but i cant seem to find them .

Device:

iPhone 5s

Status:

open

Accepted Answer:

395157

Edit by: oldturkey03 (vote details) ,

Title:

current draw fluctuating when power button pressed

Text:

Hi , i have an iphone 5s which had a charging issue , i changed the U2 and it was working fine i charged battery fully and phone was ok .

I replaced the shields ,put the phone back together and it didnt work .

took it apart again and found U1600 looked a bit damaged ,  i thought i was careful but maybe i caught it when replacing the shields , anyway i have changed U1600 but still the same .

when connected to dc power the amps fluctuate (see this video)

[https://youtu.be/_knDmtpjeNA|5S no boot]

What does this indicate . ?

I have checked PP_BATT_VCC_CONN and its good 3.8 V

I thought on the schematic it listed the critical  voltage lines but i cant seem to find them .

Device:

iPhone 5s

Status:

open

Accepted Answer:

395157

Original post by: markparnell1972 ,

Title:

current draw fluctuating when power button pressed

Text:

Hi , i have an iphone 5s which had a charging issue , i changed the U2 and it was working fine i charged battery fully and phone was ok .

I replaced the shields ,put the phone back together and it didnt work .

took it apart again and found U1600 looked a bit damaged ,  i thought i was careful but maybe i caught it when replacing the shields , anyway i have changed U1600 but still the same .

when connected to dc power the amps fluctuate (see this video)

[https://youtu.be/_knDmtpjeNA|5S no boot]

What does this indicate . ?

I have checked PP_BATT_VCC_CONN and its good 3.8 V

I thought on the schematic it listed the critical  voltage lines but i cant seem to find them .

Device:

iPhone 5s

Status:

open