HP-10 repair, strange piece of plastic.


Currently I am repairing an HP-10 calculator.

I opened the case and cleaned all PCB's.

On the backside of the CPU PCB I found a piece of red colored plastic.

It seems that there is something broken/missing here.

What is the original shape of this piece of plastic and

what is its function?

Photo of the back side of the CPU print

Any help is welcome,

Kees van der Sanden


I'd have to look at one of mine to be sure, but I believe that is exactly how it is supposed to look. The plastic is to keep the moving print mechanism (ribbon cable) from scraping against the back of the circuit board.



Many thanks for your fast and clear response.

Kind regards,


Possibly Related Threads...
Thread Author Replies Views Last Post
  Strange HP 25 Problem (Repair) Onur Ilkorur 5 557 12-06-2013, 05:13 PM
Last Post: Onur Ilkorur
  Strange Battery Icon during updaate of Prime Firmware. Harold A Climer 7 780 12-05-2013, 04:40 PM
Last Post: Michael de Estrada
  Shutdown with the Apps key and more than 10 variables in a program. Davi Ribeiro de Oliveira 10 838 11-05-2013, 01:26 PM
Last Post: Han
  HP PRIME : strange behavior when trying user key capability Damien 12 867 11-03-2013, 11:02 AM
Last Post: Joe Horn
  HP-41 Plastic Slide mbrethen 4 433 11-01-2013, 10:14 AM
Last Post: Kimberly Thompson
  HP Prime function APP - Strange limitation ! :o( dg1969 2 344 10-04-2013, 12:10 PM
Last Post: dg1969
  Updated PPC DVD Version 2.10: HP-41 Searchable Program Files and Scannable Barcode Jake Schwartz 3 385 09-27-2013, 09:51 PM
Last Post: Olivier (Wa)
  HP41CX: Strange serial #... Stephan Matthys 1 237 09-13-2013, 01:38 PM
Last Post: Stephan Matthys
  Rounding of 10^x Olivier De Smet 8 507 08-28-2013, 06:33 AM
Last Post: Dieter
  [WP34s] strange behaviour at number entry Dieter 12 841 06-06-2013, 05:36 PM
Last Post: Harald

Forum Jump: