Hp-41C card reader - dead
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03-27-2020, 09:39 PM
Post: #3
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RE: Hp-41C card reader - dead
Being a self contained reader, there is quite a lot going on inside the unit which means many things could be wrong.
If the motor is not coming on at all, the first thing I would check is broken/corroded wiring or connectors. Check the circuit board for corrosion. If you are handy with a voltmeter then you may be able to check out basic voltages around the circuit. This is the reader circuit. http://www.hpcc.org/cdroms/schematics5.0...p82104.pdf Hopefully it is not more complex otherwise an IC like a ROM may have failed. If in the end you do decide to bin it, please do it my way, I'd love to play around with it :-) cheers Tony |
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