“Long version: This MonoPoly is fully functional. I have owned it for about 15 years, during which time a number of servicing actions have been implemented. All of the pots and switches have been treated (Caig) and last week the main PSU smoothing capacitors were replaced (see owner’s manual KLM-376-MP, C13/14 etc.). The PSU rails (+/-15V and +5V) have been recalibrated to within the manufacturer’s original tolerance and the ripple per rail has been measured to be <10 mV.
When I first got my MonoPoly, the front panel screws had rusted, or the surface finish on them had worn off, so I replaced them with button headed socket screws (2.5 mm, see pictures). I have fitted a MIDI interface (MidiPoly, instruction manual/details will be emailed to the winning bidder). This has been done without altering the original instrument, except that now the rear mains subpanel has an IEC mains inlet fitted (rather than a flying lead), with 5 pin DIN MIDI in and out sockets immediately adjacent to it. The front panel (this one is in good condition) is not modified in any sense (no additional switches or controls, for example). All of the original MonoPoly’s functions are kept but fitting the MIDI interface adds the following functions” Click here to search for synths on eBay