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Vintage Synth Repair

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[vintagesynthrepair]

2010-07-02 by Scott S.

Hi to all, I've been lurking a bit, but mostly accumulating good info for later study. I got a Roland MT-32 recently for (almost) free from a music store going out of business. The display is dim, the basic controls seem to work, but the audio only puts out a big constant HUMMMMMM from both outputs. I assume sometime in it's life it was plugged in with a regular positive tip DC supply, instead of Roland's desired negative-tip.

I have only had time for a few minutes to hook it up briefly. I haven't had a chance to try the reset of "hold master volume, press rhythm part, press part 1" yet. I know about the "no channel 1" problem inherent to these.

I haven't had the lid off yet, are their any obvious PSU caps/regulators to look for?

thx-Scott S.

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