It really is a dangerous thing to do, prone to causing shorts. Here's what I do when the wood cabinet is off (not implying that it's safe, just much safer than what you wanted to do):
- Remove the wood cabinet. You just need to remove the 4 screws and the dummy plug - put the latter back when the cover is off, or the keyboard won't work.
- You will see a little plate holding holds two 4mm banana plugs inside the wood cabinet. This is a safety feature: these plugs make contact in the black small plastic box next to and over the power socket , so that the recorder cannot be operated unless it's in the cabinet. See the two 4 mm holes? These are the matching 4 mm sockets, and the plugs makes the circuit within each ot them (not between them!) so the mains makes it to the power supply.
- You can use these holes as an alternative power socket, by inserting ordinary banana plugs into these hole. One plug is connected to live and the other to neutral.
Do not short these two plugs!!! Needless to say, you do this at your own risks, electrical safety is not guaranteed - especially if the bananas get snatched from the holes.
I'd still look for those 2-prong IEC cables though, but that's just me. BTW the
wikipedia says that the same C9-C10 socket was used by Roland for some of its equipment, e.g. the TR-909. It might be worth giving it a shot. The modern 3-prong IEC socket should fit the same size as the original 2-prong socket, but the replacement is more challenging than it appears at first sight: you have to destroy the 5 rivets (that's the easy part) and then replace them with something that does not protrude either, otherwise you won't be able to slide the cabinet back in (there is hardly any clearance). Ordinary screws with cylindrical heads won't do!
