Hello!
So I got myself an 7225B Pen plotter and I'm now looking for the manuals for this unit. I' aware that the HP Computer Museum has the stuff for the preceeding A variant but the B model is significantly different. The hand drawn B schematic someone posted there is also not of much help since there is only silkscreen for about 30 components on the board. Making finding what is described on the hand drawn schematic a chore and quite the guessing game.
If there is anyone interested in pictures I will upload those in a dedicated thread on the eevblog forum.
