Fez Panda 2 power regulator

NETMF & Gadgeteer
1

Hi!

I have running now a Panda2 with Ethershield and various sensors for about two years. The last time there were more and more crashes (mostly network errors) causing the board to hang. Soft reboot succsesless.
I thought the power supply has gone - no: constant 7.5V, max1000mA - End of all: the onboard voltage regulator seems to be brocken! The PWR LED glooms a bit and the board refuses to start.

USB power feeding is OK but not an alternative.

Is the Panda ready for the garbage can, or is there a way to repair it?

greets,
mark

2

If USB powers up the board, then it sounds like the 5V regulator has failed. This is not used when powering from the USB port from a quick glance at the schematic.

If you are handy with a soldering iron, you could source a spare regulator and replace it?

The part is pretty standard and various electronics suppliers, Farnell, Digikey etc should all have this part available.

3

Thanks for the answer - this was unfortunately what i guessed…

I’ll try to get the schematics as it’s out of warranty!

4

@ Mark15, I have a handful of the 3v3 and 5v regulators suitable for this if you are in AU that I’ll post you gratis (I bought 100 of each on ebay)

You can get the schematic and eagle files on https://www.ghielectronics.com/catalog/product/256, resources tab.

5

@ Brett: Thank you very much, nice! But I’m sitting in the heart of Bavaria/Germany, so it’s not the next way :wink:

i’ll have a try these days/weeks within the first time SMD soldering…

6

Hi

Not sure where in Germany you are but these guys will have the part you need.

http://de.farnell.com/?CMP=ffp-sm-flag-de

Good luck with the SMD. If you don’t have a hot air pencil I like to use solder braid and then cut the leads and remove them.