HP-65 more on the card reader

[albertofenini]

Tony read below,
is an excerpt from a very hold post about a strange behavior from an HP67.

http://www.hpmuseum.org/cgi-sys/cgiwrap/...?read=9683

Look like changing the capacitor in a near by of Vbatt was the solution.
Being mine an HP65 does anyone know where I can find the capacitor that regulates Vbatt ?
Thanks for help, Alberto

Re: A weird HP-67 card reader problem - SOLVED?
Message #10 Posted by Viktor Toth on 12 June 2001, 8:13 p.m.,
in response to message #9 by Tony Duell
Thanks for your valuable advice! I saw no signs that the capacitor across Vbatt would be the culprit, but I decided to try changing it anyway. Well, guess what... to my considerable surprise it seems to have solved the problem. I am going to try and see if this solves the issue on the second CPU PCB as well.

What is the nominal value of this capacitor? I tried to measure it, and my meter says it's around 50uF, which seems way too high. The highest valued tantalum I had in my toolbox is 15uF, and that's what I used as a replacement, and that seems to work fine.

Well, this was educational to say the least. Thanks again to everyone who tried to help!

Viktor