Yamaha CS80

Well after being fired up for the first time in many years there is a problem or two. (it actually
had a few, but they seem to be sorting themselves...)

1. Panel setting on Channel 1 if I turn off both oscillators there is still plenty of sound. All the
other panel controls are effecting the sound though.

2. Voice 3 on Channel 2 is outputting only noise instead of a saw/square. Sine is working
well.

Any help would be great!

Thanks,
Heath

2. Voice 3 on Channel 2 is outputting only noise instead of a saw/square. Sine is working

well.

when i had this problem, it was a bad VCO chip(153?). sine and noise are not generated there. easiest way to tell is to swap the chip out for a working voice-be careful! the legs on those types of chips are easy to bend putting them in and out of sockets. good luck-rj





















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Thanks for that tip. Don't know why I didn't think of that as I've done that in a P5 before.
After swapping them and the problem stayed I decided to crank up the scope and check
the waveshaper and I believe that is the problem. Now I just need to find one of those!

Thanks,
Heath

--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
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> 2. Voice 3 on Channel 2 is outputting only noise instead of a saw/square. Sine is
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> when i had this problem, it was a bad VCO chip(153?). sine and noise are not generated
there. easiest way to tell is to swap the chip out for a working voice-be careful! the legs
on those types of chips are easy to bend putting them in and out of sockets. good luck-rj
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