New ESP32-POE-ISO - was I sold a second hand unit?

[chrismacp]

Hi,

I recently had to buy a new ESP32-POE-ISO as I mistakenly applied 12v to my previous one for a few seconds and it no longer functions (although LEDs do come on).

After unpacking the new unit I noticed it had an extra component ("570F KE") connecting capacitor C26+ to the black box component (DCDC1 I think). I couldn't find a match online to the extra component "570F KE".

I was wondering if this component was to be expected or if I should return this unit? I don't really want something that someone has modified.

Some images (don't seem to open using [img] tags)

https://drive.google.com/file/d/1ccucp0A1oC0FB8-1nU1VaNSfdpXIjaSX/view?usp=sharing

https://drive.google.com/file/d/1Ahccl6cMLyJu11ljA_Rqvy3IGnk5gCB4/view?usp=sharing

https://drive.google.com/file/d/1dgueAAM4adKMQBRIsOjPSFV30N7dl61-/view?usp=sharing


Note: I didn't purchase directly from Olimex, but another store, in Germany.

[LubOlimex]

No, you are good. This is a factory patch applied in hardware revision M1. It is mentioned in the hardware revision changes:

https://github.com/OLIMEX/ESP32-POE-ISO/blob/master/HARDWARE/Hardware-changes-log.txt

[LubOlimex]

Where did you apply 12V to? Maybe it can be fixed by changing a component or two.

[chrismacp]

Thanks for the response, happy to hear I don't have to send it back

For the 12v issue, I applied it to the 5v pin, no other power would have been applied from usb or ethernet.

[LubOlimex]

Probably U7 died. Maybe try replacing U7 which is TPS62A02ADRLR(SOT-563-6) and see if it'd work. It is not the easiest soldering job but not the hardest either. Hopefully it is the only component that died.