Yamaha CS80

So your first gess was right , bravo ! You must be proud ! 

Me i am begening to understand why my cs-80 was left in a barn for 20yrs .  I will need a couple of waveshaper and filter , noooooo ! I was so excited just to ear sounds from it , now that the rush is gone  . there is still more work and money envolved ! 

is there a particular sequence for the calibration , or can i do VCa after vcf . Because since my system was modified by microsine , they have adapted calibration in concequence . Vfc is off , vca also . I dont what to mess with the tuning right now . 

and i will change those NP capacitor first thing .. thanks . 

--- In yamahacs80@yahoogroups.com, "Laurie Curry" <laurie@...> wrote:
>
> 
> Success........
> 
> 
> I guess I should have suspected the "4.7/16Â NP" Caps between the out
> of the OSC chip and the in on the Waveshapers all along.... There was
> nothing passing through them, and I believe the signal was picked up 
> Attenna style due to the proximity...lol
> 
> 
> All 16 ready for Tuning.....
> 
> 
> 
> 
> 
> -----Original message-----
> From: "Laurie Curry" laurie@...
> Date: Sun, 12 Apr 2009 14:21:25 -0600
> To: yamahacs80@yahoogroups.com
> Subject: Re: [yamahacs80] Waveshape Chip....Help me Further Diagnose
> this please....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 Mboard 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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