Pipo 8 problem

[g8gtz]

Due to confusion with red and black wires during the activity weekend, my Pipo8 went bang

To start with, it looks like it took out a 220 uF capacitor and what I presume is a low voltage regulator IC seem to have suffered but I can't read the part number as it's brown and charred - see the picture.

pipo damage.jpg (77.47 KiB) Viewed 5884 times

Is anyone willing to take the bottom off their Pipo and drop the main board (just 4 screws and the wifi aerial connection) and see if you can read the IC part number.

Thanks in advance
Noel - G8GTZ

[G4EWJ]

On one line it has "1930" and on the line below "3314563". There's no manufacturer's logo.

Brian

[g8gtz]

Thanks

Semtech 1456 might be it but seems too old (2000)

https://www.digchip.com/datasheets/part ... TR-pdf.php

Noel

[G4EWJ]

Seems like too small a package. How about:

http://www.mouser.co.uk/ProductDetail/M ... MAX1930ESA

Which pin is the ground on?

Brian

[M0DTS]

It's a DC-DC convertor chip, mine has exactly the same markings and no manufacture logo.

pin 4=Ground
Pin 1,2 go to the large inductor, as far as the rest not really sure!
There's an LT1930 but it does not show up as so8 package....

Rob

[g8gtz]

Is anyone willing to measure the volts on the inductor / 0 ohm / 220 uf capacitor, all of which I presume are on the output of the switched regulator?

Once I know that I can rig up a supply and test whether everything else works before trying to find a replacement

Thanks in advance.

Noel - G8GTZ

[G4EWJ]

There's 5.1v on the 220uF nearest the battery. The other 220uF has 12v on it - presumably the power input.

Brian