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Pipo 8 problem
Posted: Fri Mar 24, 2017 9:55 am
by 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 5883 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
Re: Pipo 8 problem
Posted: Fri Mar 24, 2017 10:52 am
by G4EWJ
On one line it has "1930" and on the line below "3314563". There's no manufacturer's logo.
Brian
Re: Pipo 8 problem
Posted: Fri Mar 24, 2017 5:52 pm
by g8gtz
Thanks
Semtech 1456 might be it but seems too old (2000)
https://www.digchip.com/datasheets/part ... TR-pdf.php
Noel
Re: Pipo 8 problem
Posted: Fri Mar 24, 2017 6:14 pm
by G4EWJ
Seems like too small a package. How about:
http://www.mouser.co.uk/ProductDetail/M ... MAX1930ESA
Which pin is the ground on?
Brian
Re: Pipo 8 problem
Posted: Fri Mar 24, 2017 6:57 pm
by 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
Re: Pipo 8 problem
Posted: Wed Apr 05, 2017 10:26 pm
by 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
Re: Pipo 8 problem
Posted: Wed Apr 05, 2017 11:25 pm
by G4EWJ
There's 5.1v on the 220uF nearest the battery. The other 220uF has 12v on it - presumably the power input.
Brian