Guru
Joined: 13/10/2014
Location: AustraliaPosts: 715
| Posted: 02:08am 27 Jun 2019 |
This is not looking good:
I compared the two boards and checked the voltages on the USB +5v switch.
Both boards use the same parts:
Both SS switches have exactly the same voltages applied to the inputs.
Pin:
1: USB V-out 0v on V2 (+4.8 on V1)
2: GND
3: Fault 3.27v Active low.
4: Enable 3.27v
5: 5v in 4.8v
Output is connected correctly to USB socket, no shorts.
Again Both V2 boards are the same.
It's all too hard.