Hp-41C card reader - dead

[teenix]

Maybe a long shot, but the motor speed may be out of acceptable limits for successful reading or writing.

The card runs through the reader at about 6cm per second so it should take about 1 second to pass through the reader. The speed can be adjusted with a small trimmer located on the CPU board underneath the plastic housing that feeds into the 41.

It would be a bit hard to time the card, but you could mark the adjusters current position as a restoring reference and try fiddling with it.

cheers

Tony