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SiriusHardware · 3rd Mar 2020, 7:59 pm

As mentioned in one of those earlier threads, beware the NiMH battery on these - rather than leaking electrolyte it seems to weep some kind of corrosive gas which damages tracks, through-hole VIAs and screen printing in a fair sized radius around the battery. If you don't replace it, at least remove it before it does any damage.

If you no longer remember what the mod is for then it might be best to record the details of it carefully and revert the PCB back to as-designed, as per the circuit diagram, as a starting point for getting it working.

Which are the ICs which are involved in this modification, is it the RAMs by any chance? The original RAMs were 6116 types, I am wondering if you have modified it to accept some other type of RAM IC in what were originally 6116 sockets.

3rd Mar 2020, 7:59 pm	#4
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,577	Re: Maplin Z80 SBC As mentioned in one of those earlier threads, beware the NiMH battery on these - rather than leaking electrolyte it seems to weep some kind of corrosive gas which damages tracks, through-hole VIAs and screen printing in a fair sized radius around the battery. If you don't replace it, at least remove it before it does any damage. If you no longer remember what the mod is for then it might be best to record the details of it carefully and revert the PCB back to as-designed, as per the circuit diagram, as a starting point for getting it working. Which are the ICs which are involved in this modification, is it the RAMs by any chance? The original RAMs were 6116 types, I am wondering if you have modified it to accept some other type of RAM IC in what were originally 6116 sockets.