Re: HP 65 CARD READER Message #3 Posted by Tony Duell on 9 June 2005, 6:26 a.m., in response to message #1 by PHILIPPE
The 65 and 67 readers are electrically much the same, even though they may use different chips (which are pin-compatible). The PCB layouts may be different.
What I would do is trace the connections from the reader head to the IC pins in your 67 using an ohmmeter. Now do the same tracing on the 65 reader board so you know what the 5 pads are and solder the wires down.
IIRC, black is an earthed screening connection
Red and Yellow are one head coil
Blue and Orange are the other coil
But you must get the polarity of the coils right too.
The HP65-Notes file in the articles forum here might give some useful info too.
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