Finally, got all I need to get started. Shift registers arrived today, together with a fresh batch of flux.
First order of business, getting my 'assistant' well fed and ready for a good catnap. Some Tuna in a can did the trick. No interruptions what so ever for the rest of the evening.
Got on with it by dismantling the Amiga piece by piece until I could finally get the motherboard out of there. Quite an operation in itself and not a design I'd call brilliant.
That done, the battery got unsoldered and removed. Next up the 10k resistor network. That took care of the through-hole parts. Before getting on with the SMD parts, I took a little 'before' picture:
(full size here:
clicky click)
Looking kinda' crusty huh?
After removal my heart sank a bit, as the pads where not to be seen whatsoever. Just a lot of crud and stuff.
(full size here:
Clicky McClickface)
Added flux, applied some heat, went to town with soldering iron and new solder. Wiped off using solder-wick, cleaned with isoprop and a toothbrush. Rinse - repeat a few times.
Slowly getting better, so after a proper isoprop cleaning and reassured that none of the pads would lift, I went to work with a dentists pick to loosen up the worst of the crud. Once that was done, some careful wiping (with plenty of isoprop on the board) with steel-wool attached to the end of a q-tip stick.
(full size here:
clicky'nopornIpromise'me)
Looking much better. Though not entirely done. Some probing have shown that I suspect a trace or two may need some attention as well. Anyhow, I got all weekend to work on it. Now it is late, and I'd probably screw something up if I work more on it now as I am getting a bit tired...