HP 65 Question?

[AndiGer]

(04-02-2017 01:17 AM)rprosperi Wrote:  

(04-01-2017 06:41 AM)AndiGer Wrote:  As always be warned: Never use the card reader unless a good battery installed operated by the charger only.
You can operate the calc from the charger but never the card reader.
I think you know
Andi

Can you elaborate on this Andi? How is operating the card reader with the charger plugged-in dangerous? Is there some risk of over-current to the card motor or something along those lines?

Not personally, never did. In the Owner's Handbook 00065-90200 we have on page 87:
Running the HP-65 from the ac line with the battery pack removed may result in damage to the calculator.
On the other hand some lines higher you can find:
Since you cannot operate the card reader/writer without a charged battery, even with the charger plugged in, the battery should not be removed while running from the ac line.

The latter could be a hint that the card reader is switched off internally with the charger plugged in. On the other side we have the warning.
Andi

Edit: This was already discussed in the old forum years ago ...
http://www.hpmuseum.org/cgi-sys/cgiwrap/...read=77706
http://www.hpmuseum.org/cgi-sys/cgiwrap/...read=89060