HP-19C Printer

[teenix]

Hi all,

I'm trying to get a non working 19C going again for someone.

It had some battery corrosion mostly around the pins connecting the printer connections between the two circuit boards. I cleaned this up and it started working again but then stopped again. I had to clean out the plated through holes properly to get a better connection and it seems to be happy now.

I only get "Error" if I press [g] [PRx] to try and use the paper feed, either with paper in or out, with the print head in the home position. The Home switch is working right up to the PICK pin.

Does the 19C actually detect paper out? I cannot see any switches for this on the mechanism.

I am not familiar with the printer mechanism, but I would expect the print head to be attached to the slots in the worm gear, however the print head just slides back and forth. The motor works when connected to a bench supply, but the print head stays put.

Any ideas for the clueless ?

cheers

Tony