Re: 41c card reader no drive Message #2 Posted by Tony Duell on 15 Oct 2005, 6:10 a.m., in response to message #1 by Hal
Again I am working from memory and don't have the schematic in front of me, but from what I remember, the card reader motor is powered straight off the HP41 battery, not from the logic supply line that's used for all the other chips.
If that contact in Port 4 is dirty/corroded, or if there's a bad connection between the HP41 I/O assembly flexiprint and the keyboard PCB inside the HP41, it's possible that the card reader motor will get no power, but the CAT 2 response will be fine.
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