Vintage Synth Repair

Thank you Scott!  I'll definitely check this out.  Much appreciated.

Jim

--- In vintagesynthrepair@yahoogroups.com, "Scott" <painintheamp@...> wrote:
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> --- In vintagesynthrepair@yahoogroups.com, "Jim Atwood" <photoshootjapan@> wrote:
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> > Hello!
> > 
> > I'm curious if anyone has owned and experienced static output with the Roland S-50.  I'm trying to determine whether I need to replace the Output Jack board or the CPU board.  Static is heard across all outputs including the headphone jack.  Playing the S-50 at low volume levels results in minor static but as you increase playing velocity or volume the static increases.  Here is a file with an example of the S-50 static.
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> > http://jimatwood.net/synth/Roland-S50-Static-Output.WMA
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> > Any thoughts would be greatly appreciated.  Thanks!
> > 
> > Jim
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> The output op amps are going into distortion mode. This is probably due to a less-than-clean +/- supply going to the op amps. Have someone with an oscilloscope check the power supply ripple on the amps. But, if the supplies are ok , I would suggest replacing the op amps.
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