HP 82240a printer barely advancing paper

[Jlouis]

(05-06-2016 08:51 PM)damaltor Wrote:  As a guess, without having opened one: There might be a (rubber?) wheel which should advance the paper. maybe it is broken/gooey/...?

I just opened it, no rubber wheel, just plastic gears.

Hardware wise, nothing is wrong, nothing broken.

Maybe there is not sufficient voltage for the dc motor?

It would help if someone have the circuit schematic for these printers.