Sequential Circuits Six Trak with a few problems

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Sequential Circuits Six Trak with a few problems

Postby suburbanbeat » Tue Feb 05, 2019 2:56 am

Hi all. Just picked up an untested Six Trak and, sure enough, it's got a handful of issues. I will list them here in perceived order of repair complexity:

1) MIDI control not quite working. Currently, I am able to control monophonically using an external keyboard after selecting channel 1 in parameter 36. Any other channel does nothing, and I've tried changing between the four MIDI modes - no dice. What should I do so that I can control this thing polyphonically?

2) Voice #1 out of tune and growls a bit. I've found that a few other people online have talked about out of tune voices, but most responses seem to just involve pressing CNTRL REC+6 to auto tune. I've tried that, and no dice.

3) Voice #4 dead? No sound at all on voice #4.

4) Pitch wheel not responding. MIDI pitch bend works normally.

Any insight into any of these? I have basic soldering skills and a multimeter.

Thanks in advance!
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Re: Sequential Circuits Six Trak with a few problems

Postby synthchaser » Tue Feb 05, 2019 11:25 pm

You'll probably need an oscilloscope to get anywhere with it.
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