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January 2011

Fixing a Roland PC-200 MIDI keyboard controller

Continuing in my series of keyboard repair blogs, I recently bailed an old Roland PC-200 keyboard out of storage. This old guy is just a 4 octave MIDI controller (no sound generator), but it fit the bill for having a reasonably sized polyphonic keyboard for a NYC apartment. Unfortunately it had long ago developed a problem with an F# key no longer working.

While there are newer controllers with many more buttons and polyphonic aftertouch, it seemed such a waste to replace it just because one key didn't work. After a little net research, a problem with many keyboards is that the carbon contact pads glued onto the rubber deteriorates. Replacements for these are available, but this was not a solution to the problem in this case.

PC-200 keyboard carbon pads

PC-200 keyboard carbon pads

A close up view of the carbon pads of a Roland PC-200. The rear pads have deteriorated causing the pad to stop conducting.

G-202 body

G-202 body

A view of the Seymour Duncan replacement pickups, piezo and magnetic hex pickups, original potentiometers and the added extra switch for splitting the humbucker coils next to the original humbucker selector switch.

G-202 magnetic and piezo hexaphonic pickups

G-202 magnetic and piezo hexaphonic pickups

A view of the original GK-1 magnetic hexaphonic pickup, the RMC piezo bridge pickups and a Seymour Duncan SH-5 Custom pickup installed into the G-202.

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