HP-41 Card Reader

[Hiwi]

Hi Mark,
what does it mean 'does not detect' ?
Do you get a 'malfunction' or 'card error' message?

Have you tried to record a program and read it back?
Do you have a Nov64d module installed? On newer CX there is a minor issue due to the change of the power management. There is a thread about that issue. Try it without any modules installed.

Was the reader fully functional before the roller became gummy?

And the roller axle is excentric, did you adjust it? The correct adjustment: Apply 3 volts to the motor, and measure the current, it should be about 200mA.

In some cases the card is not pulled evenly enough.(Or too fast). May be not enough pressure => adjust axle.

Did you clean the card, that may be done with den. alcohol.


Ralf