HP 41CV card reader Message #1 Posted by John Bjornholt on 4 Feb 2009, 11:54 a.m.
Does anyone have any technical info on the HP41CV card reader, such as schematics, block diagrams, trouble-shooting procedures, etc? I recently sucessfully repaired the drive wheel on mine, but now I get a "malfunction" display when it tries to read a card. I have an o-scope and other necessary test equipment to check for waveforms, voltages, etc.
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