HP Forums
HP41 card reader repair / opening - Printable Version

+- HP Forums (https://archived.hpcalc.org/museumforum)
+-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html)
+--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html)
+--- Thread: HP41 card reader repair / opening (/thread-78599.html)



HP41 card reader repair / opening - Peter - 09-23-2005

Hello fellow HP friends

How do I open the HP 82104A magnetic card reader? I just aquired one that shows the first signs of the "gummy wheel problem", and would like to fix this.

Btw, when I do this, I will take photos, and publish a visual repair guide, if sufficient interest is here.

Best regards
Peter


Re: HP41 card reader repair / opening - Randy - 09-23-2005

Visual repair guide already done. Start here: http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=57 and finish here: http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=239

Edited: 23 Sept 2005, 8:45 p.m.


Re: HP41 card reader repair / opening - Howard Owen - 09-23-2005

There are actually two guides in the article archive. But this is such a tricky operation, I don't think a third photo essay would be taken amiss by anyone! 8)


Re: HP41 card reader repair / opening - Peter Geiser - 09-24-2005

Great, thank you! Stupid me didn't find the articles.

So now I have something to do over the weekend ;-)

I'll tell you how it went.

Peter


Re: HP41 card reader repair / opening - Peter Geiser - 09-25-2005

This afternoon, I repaired the card reader. It works fine now.

As promised, I created a small guide with a few images to document it:
http://www.pmgeiser.ch/calc/index.php?id=HP82104A

Best regards,

Peter


Re: HP41 card reader repair / opening - David Smith - 09-25-2005

Peter, you should add a warning note to your page... Before taking apart the internal mechanism, make a note of the locations of the wires to the read head and motor. They can pop out of the connector pins when you move the motor assembly.


Re: HP41 card reader repair / opening - Peter Geiser - 09-25-2005

Good idea! Thanks for the hint, I have added a short notice for this.

Regards

Peter