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Subject: Re: Looking for Circuit Diagram of P-100 PC


Author:
Roger Dalziel
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Date Posted: 11:28:01 12/03/03 Wed
In reply to: Michael Herklotz 's message, "Looking for Circuit Diagram of P-100 PC" on 07:16:28 12/03/03 Wed

Mark Fontana has put a great deal of Pianocorder documentation on CD-ROM, including schematics. Check out his latest post to this forum and visit his Pianocorder web site regarding availability.

Several things go wrong with the power supply which are not well-documented, however. Use of a too-small extension cord can take out the 5-volt supply's bridge rectifier, for example; the varistor in the 170-volt supply for the solenoids can fail, resulting in a blown 10-amp fuse and/or lots of arcing and spitting at the power switch.

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Replies:
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Re: Looking for Circuit Diagram of P-100 PCRob/hanneke12:44:48 10/23/05 Sun


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