Tell me, should I disconnect/insulate the 14th pin? I've been told that there's a +5V there and it'll burn the printer just after connecting. Also Amiga-related magazines confirm that statement. However, it's a Commodore printer (MPS-1270A InkJet - that "A" stands for Amiga version) so I'm not sure if that's necessary, maybe it needs that voltage.
Please, share your suggestions, it'd be a pity to blow up such a nice printer.