Labeled edge connector, PCB and bus expansion PCB.

It’s a 2040 printer, no power supply. Those dark spots where the zeros should be in 2040? I’m pretty sure they’re LEDs. Not sure why you’d need one, much less two LEDs on a 2040, but there you go.


There’s not much to say about these boards. Maybe you could mine them for the 8251 on board or find a use for the old RS-232 line driver?