HP 67 problems



#3

Hello

I bought a HP 67 and after a quick test, I opened it to repair then gum card reader. Once assembled everything I encounter two problems:

1 - The reader does not work, it does not take the card when I insert it. I tried to connect the motor directly to the battery and it works. I have also checked the circuit and it is closed when I start inserting the card. What is it wrong ? Maybe is the chip damaged ?

2 - When I switch to program mode, nothing changes. I also tested the continuity of the tracks and it seems ok ... How can I fix it ?



Thank you very much in advance



Manel


Edited: 11 June 2013, 5:40 p.m.


#4

Welcome to the Forum, Manel!

You may find these links useful:

http://www.hpmuseum.org/guest/hoskins/67crfix.pdf

http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=179

Regards,
Bob


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