HP-10 Printing Calculator


I just picked up a HP-10 from a local swap meet for $12.00. There is only a very minor bit of corrosion on the two terminals. Is there any documentation regarding cleaning and repair or anyone who could comlete this?


Wow, what a find, I'm sure that there are a lot of envious collectors here! If you look through the forum achieves you'll find some info about repairing the 19C and 10 that may help you. Also Michael Meyer's article might be of help: HP-19C printer overhaul discoveries since the 10 and 19C have the same printer.

Edited: 8 July 2006, 12:12 p.m.


...Assuming that the corrosion is from the Ni-Cd batteries, a mild solution (5%) of borac acid in water will dissolve the corrosion without harming the metal contacts. The exact strength of the solution is not very critical at all because borac acid is pretty mild. Be sire to rinse and dry the contacts thoroughly, and don't let any liquids drip into the case...


After cleaning the contacts, I go at them with a wire brush in a Dremel tool and then treat them with Caig DeOxit.

After opening the machine, I think you will find corrosion inside.


I got the calculator working the other day and everything functions as it needs to. The battery pack still holds a charge although I will rebuild it. Is there any parts on the inside that are difficult to assemble if I remove the screws for cleaning? I dont think that I will rebuild the printer as it works fine. Thanks for all the suggestions.


It can be a bit of a chore getting the thing back together. It is two circuit boards connected together by pins on one board that go into holes on the other. One board is on the top half of the case, the other is on the bottom. They usually go together fairly easily, but if a pin gets bent...

Possibly Related Threads…
Thread Author Replies Views Last Post
  Shutdown with the Apps key and more than 10 variables in a program. Davi Ribeiro de Oliveira 10 3,847 11-05-2013, 01:26 PM
Last Post: Han
  Printing the HP Prime manual BobVA 3 1,788 10-25-2013, 09:53 PM
Last Post: BobVA
  Updated PPC DVD Version 2.10: HP-41 Searchable Program Files and Scannable Barcode Jake Schwartz 3 1,882 09-27-2013, 09:51 PM
Last Post: Olivier (Wa)
  Rounding of 10^x Olivier De Smet 8 2,557 08-28-2013, 06:33 AM
Last Post: Dieter
  3D printing custom molds Han 3 1,679 08-02-2013, 03:26 AM
Last Post: Bruce Larrabee
  Printing HP 9825 data Norman Pillsbury 3 1,555 06-01-2013, 10:08 PM
Last Post: David Ramsey
  Does IR printing not work on your converted WP34s? Then read on... Harald 3 1,645 04-04-2013, 05:46 PM
Last Post: Harald
  WP34s IR Printing Update? Thomas Chrapkiewicz 2 1,271 02-24-2013, 01:53 PM
Last Post: Marcus von Cube, Germany
  is there a printing error in the HP 50G Quick Starrt Guide? Al 12 3,164 11-23-2012, 07:07 PM
Last Post: Al
  HHC 2012 RPN Programming Contest - 10-Step Way-After-Nashville Solution Jeff O. 32 6,875 10-12-2012, 01:41 AM
Last Post: Paul Dale

Forum Jump: