19C - printer - 12Ohm OK - voltage pulses OK - but not printing

[BobVA]

(07-03-2020 10:18 PM)vassilisprevelakis Wrote:  The second part (in English) contains lots of info on fixing HP calcs in general and HP-19C in particular.

Yes, seconded! Bernhard has a great deal of information there. (The 19C he repaired had a similar printer fault that turned out to be the potentiometer that controls the print darkness. You might want to check that first.)