Page 1 of 2
Removing a ULA
Posted: Mon Jul 03, 2017 11:17 pm
by mrtinb
This is not the way to remove a defective ULA. There's no room. Aargh... I'll try again tomorrow.
Re: Removing a ULA
Posted: Mon Jul 03, 2017 11:25 pm
by Andy Rea
Oh my... where you trying the hammer method
Well now that's happened i would use a small.pair of side cutters to cut each pin remove the bulk of the chip and the one at a time remove each pin with tweezers and soldering iron, clean the up the pads and your good to go.
Re: Removing a ULA
Posted: Tue Jul 04, 2017 10:14 am
by MaFli
Wow... That one must have been running quite hot
Or did you Widlarize it?
(
https://en.wikipedia.org/wiki/Bob_Widlar)
Re: Removing a ULA
Posted: Tue Jul 04, 2017 11:12 am
by mrtinb
I'm trying to remove it but I don't have a cutter that's small enough. And I gave up desoldering.
To put it simple: I don't have the tools to remove an IC.
Re: Removing a ULA
Posted: Tue Jul 04, 2017 11:27 am
by PokeMon
Well - this is not a high quality tool like side cutters from Knipex (I prefer) but sufficient for this job.
http://www.ebay.de/itm/Red-Plastic-Coat ... SwR29ZLovl
Re: Removing a ULA
Posted: Tue Jul 04, 2017 11:48 am
by mrtinb
Once again Dremel is your friend.
Re: Removing a ULA
Posted: Tue Jul 04, 2017 1:36 pm
by mrtinb
Finally! The tinsucker was great help. I hope I didn't cut some traces during the battle.
Re: Removing a ULA
Posted: Tue Jul 04, 2017 2:56 pm
by PokeMon
Well - I would use a socket now rather than soldering the next ULA again directly.
Re: Removing a ULA
Posted: Tue Jul 04, 2017 3:01 pm
by mrtinb
That's the plan.
Is there an issue 3 pcb layout somewhere?
I think I have bruised a connection. It would be easier to find that with a pcb layout than using a schematic.
Re: Removing a ULA
Posted: Tue Jul 04, 2017 6:03 pm
by brozier
Is the bruised connection visible with the ULA in place?
I have an early Rev 3 board with the older ULA in it. Happy to take pics if you need them...
Cheers
Bryan