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Subject: Re: Help! I've messed up my Pianocorder.

Mark Fontana
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Date Posted: 20:34:49 10/25/09 Sun
In reply to: Roger Dalziel 's message, "Re: Help! I've messed up my Pianocorder." on 15:32:44 10/25/09 Sun

Ouch... been there, done that (both frying the whole Pianocorder AND replacing every IC on every board by hand). I fully agree with Roger - letting that loose ground wire contact the circuit boards almost certainly fried every IC and transistor in the system. The three driver boards and playback board will need all of their ICs and transistors replaced (but not the solenoid drive transistors and also not any passive components like resistors or capacitors). The solenoids will all be fine. Total cost will be under $50 of parts but the better part of a week in labor, a few hours per evening. A pair of small flush cutters will work in place of the Dremel tool, if you're very careful to not pull on the traces. When removing pins and installing new sockets (a wise idea), you'll need to avoid heating the traces too much, otherwise they delaminate pretty easily.

If you don't feel up to doing the repair, another solution would be to purchase refurbished boards from Randy Cox - you can reach him at 714-404-2635. I think he'll accept your damaged boards in exchange for some amount off.

Be sure to keep track of which end driver board was your good spare! I have spare end and center driver boards I'd be willing to sell, but no playback board.

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Re: Help! I've messed up my Pianocorder.Steve Mull12:40:37 10/26/09 Mon

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