Pots won't be damaged by that, no. ICs might not like their power rails being reversed, and polarised caps might not like it either, but without looking at the schematic, I can't recall if there were any such caps on that board. On the other hand you say your power rails are OK so I shouldn't worry too much about that now.

OK, inventory time.

We know the PSU components and the M110 are working.

Apart from one resistor we know about, I doubt any others, or any caps are faulty.

The pots most likely have survived, and even if not, they won't damage anything else.

The 74LS221 must be working - it's the clock chip!

The CD4013 seems to have survived, although we haven't checked the second half (just stick a scope on the output and look for the ramp reset pulse).

The first LM13700 appears to be OK.

I'd take a chance that the noise chip is OK, and it won't harm anything else if it isn't.

The LM3080 won't harm anything if it has died, and due to it's scarcity, I'd be inclined to see if it works, when everything else is sorted.

I'll be very surprised if any of the ordinary transistors are damaged. The way they are in the circuit is pretty well protected.

That all reduces your shopping list quite considerably. I would suggest a trip to Maplins. For the 33 ohm resistor you only need a 1/4W carbon jobbie - Ohms law suggests that even that is over-rated

P.S.
There's a good chance the 741s have survived - they are tough little buggers, having said that they are cheap as, err... chips

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It wasn't me!
(Well, actually, it probably was)

Edited by Folderol (19/03/12 08:20 PM)

What did you do? Any news?

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It wasn't me!
(Well, actually, it probably was)