Yamaha CS80

Does anyone have an Idea on what could be  sucking or phasing away 
the low end into to my waveshaper and adding floor noise which then
gets converted to odd waves??

Solder joints seems good all around....It is not the Filter
section....

-----Original message-----
From: "slammah2006" laurie@...
Date: Sat, 11 Apr 2009 21:07:18 -0600
To: yamahacs80@yahoogroups.com
Subject: [yamahacs80] Waveshape Chip....Help me Further Diagnose this
please....CS80

I have just replaced my waveshape converter chips (IC9) on 2 of the M
boards in Bank 2...I did this with 2 chips from spare CS60 boards I
purchased.
I believed there was something amiss with the board mounted chips when
I found that all waveforms at the Chips outputs, were containining
floor noise and lacked low end...

I checked White noise through the filters and it is perfectly fine.

The Noise appears in the SIN wave, the Square Wave and theSawtooth
Wave, so it isnt just a problem in the VCF section....

I swapped again some OSC Chips(IC8) and it is the same results with a
slightly different tuning....

I dont have access to a scope,

Does anyone have any Ideas of something simple on the M board itself
that would cause this type of result?....or could this be something
off on some other board that is causing this results and only on these
2 ???

Thanks for any Help in Advance.....





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