Yamaha CS80

Hi Everyone,

After mastering the M-board tuning procedure on my CS-50 I am now  
ready to tackle the tuning procedure for my CS-80.

Can anyone provide pointers on how to safely raise the circuit board  
rack in to the "tuning" position?  I don't see a procedure for doing  
this in the service manual.

Cheers,

Kent
New York, NY

Hi Kent,
Two bolts will need to be undone (one either side) and then the whole rack just slides up and locks by itself. To lower, you just raise it slightly (so it un-locks) and then gently lower it back down.

Cheers
TOM




--- In yamahacs80@yahoogroups.com, omegacode80 <omegacode80@...> wrote:

>
> Hi Everyone,
> 
> After mastering the M-board tuning procedure on my CS-50 I am now  
> ready to tackle the tuning procedure for my CS-80.
> 
> Can anyone provide pointers on how to safely raise the circuit board  
> rack in to the "tuning" position?  I don't see a procedure for doing  
> this in the service manual.
> 
> Cheers,
> 
> Kent
> New York, NY
>

Thanks Tom!  Is it really heavy when you're pulling it up?  Is there a  
spring mechanism that lifts it once you unscrew the bolts?  I haven't  
studied the anatomy of the side rails too carefully yet.  Just opened  
up the case and started looking around.

I'm sure I'm gonna have to carefully make sure no cables get caught up  
on anything.

Cheers,

Kent


On Apr 5, 2009, at 12:10 PM, Quazimodo wrote:

> Hi Kent,
> Two bolts will need to be undone (one either side) and then the  
> whole rack just slides up and locks by itself. To lower, you just  
> raise it slightly (so it un-locks) and then gently lower it back down.
>
> Cheers
> TOM
>
> --- In yamahacs80@yahoogroups.com, omegacode80 <omegacode80@...>  
> wrote:
> >
> > Hi Everyone,
> >
> > After mastering the M-board tuning procedure on my CS-50 I am now
> > ready to tackle the tuning procedure for my CS-80.
> >
> > Can anyone provide pointers on how to safely raise the circuit board
> > rack in to the "tuning" position? I don't see a procedure for doing
> > this in the service manual.
> >
> > Cheers,
> >
> > Kent
> > New York, NY
> >
>
>
> 



[Non-text portions of this message have been removed]

omegacode80 wrote:
> Thanks Tom!  Is it really heavy when you're pulling it up?  Is there a  
> spring mechanism that lifts it once you unscrew the bolts?  I haven't  
> studied the anatomy of the side rails too carefully yet.  Just opened  
> up the case and started looking around.
> 
> I'm sure I'm gonna have to carefully make sure no cables get caught up  
> on anything.

You might need to undo a couple of the heavy wires they use to hold the 
big cable bundles in place.

HOWEVER..................

As I finally realized after tuning CS80s for many years, if you're just 
doing the usual tuning procedure, you don't have to, and shouldn't raise 
the card frame! All the trimmers are accessible with it down. You just 
need a flashlight and to push the cable bundles up and out of the way. 
Leaving the cards down should make the temperature change less, so the 
tuning should hold better when you close up the lid.

  David

No springs Kent, just make sure you pull it up level, that is at the same rate both ends. It is kinda heavy I suppose (because you're leaning over to do it) but I'm used to it. The cables (looms) are designed to 'give' as it rises so there shouldn't be a problem if you go slowly.




--- In yamahacs80@yahoogroups.com, omegacode80 <omegacode80@...> wrote:

>
> Thanks Tom!  Is it really heavy when you're pulling it up?  Is there a  
> spring mechanism that lifts it once you unscrew the bolts?  I haven't  
> studied the anatomy of the side rails too carefully yet.  Just opened  
> up the case and started looking around.
> 
> I'm sure I'm gonna have to carefully make sure no cables get caught up  
> on anything.
> 
> Cheers,
> 
> Kent
> 
> 
> On Apr 5, 2009, at 12:10 PM, Quazimodo wrote:
> 
> > Hi Kent,
> > Two bolts will need to be undone (one either side) and then the  
> > whole rack just slides up and locks by itself. To lower, you just  
> > raise it slightly (so it un-locks) and then gently lower it back down.
> >
> > Cheers
> > TOM
> >
> > --- In yamahacs80@yahoogroups.com, omegacode80 <omegacode80@>  
> > wrote:
> > >
> > > Hi Everyone,
> > >
> > > After mastering the M-board tuning procedure on my CS-50 I am now
> > > ready to tackle the tuning procedure for my CS-80.
> > >
> > > Can anyone provide pointers on how to safely raise the circuit board
> > > rack in to the "tuning" position? I don't see a procedure for doing
> > > this in the service manual.
> > >
> > > Cheers,
> > >
> > > Kent
> > > New York, NY
> > >
> >
> >
> > 
> 
> 
> 
> [Non-text portions of this message have been removed]
>

Thanks again David and Tom for the advice!

I was wondering about getting my trim pot adjuster in there with the  
rack down.  It might be a little tough in some areas where there are  
loops of wires, but I think I may be able to do it.

Cheers,

Kent



On Apr 5, 2009, at 1:10 PM, David Rogoff wrote:

> omegacode80 wrote:
> > Thanks Tom! Is it really heavy when you're pulling it up? Is there a
> > spring mechanism that lifts it once you unscrew the bolts? I haven't
> > studied the anatomy of the side rails too carefully yet. Just opened
> > up the case and started looking around.
> >
> > I'm sure I'm gonna have to carefully make sure no cables get  
> caught up
> > on anything.
>
> You might need to undo a couple of the heavy wires they use to hold  
> the
> big cable bundles in place.
>
> HOWEVER..................
>
> As I finally realized after tuning CS80s for many years, if you're  
> just
> doing the usual tuning procedure, you don't have to, and shouldn't  
> raise
> the card frame! All the trimmers are accessible with it down. You just
> need a flashlight and to push the cable bundles up and out of the way.
> Leaving the cards down should make the temperature change less, so the
> tuning should hold better when you close up the lid.
>
> David
>
> 



[Non-text portions of this message have been removed]

Quazimodo wrote:
> No springs Kent, 

You don't have the version with the motorized lift mechanism :^)

Hmmm.. could be done - but I'd prefer to make it pneumatic David..!



--- In yamahacs80@yahoogroups.com, David Rogoff <david@...> wrote:

>
> Quazimodo wrote:
> > No springs Kent, 
> 
> You don't have the version with the motorized lift mechanism :^)
>

Just dont use a metal screwdriver....and cover the metal Key bed with
a thick towel...I usually hang a scrim over and down the back of the
cards to keep temp in....

-----Original message-----
From: omegacode80 omegacode80@...
Date: Sun, 05 Apr 2009 10:22:41 -0600
To: yamahacs80@yahoogroups.com
Subject: Re: [yamahacs80] Re: Raising circuit board rack for tuning

Thanks again David and Tom for the advice!

I was wondering about getting my trim pot adjuster in there with the 
rack down. It might be a little tough in some areas where there are 
loops of wires, but I think I may be able to do it.

Cheers,

Kent



On Apr 5, 2009, at 1:10 PM, David Rogoff wrote:

> omegacode80 wrote:
> > Thanks Tom! Is it really heavy when you're pulling it up? Is there
a
> > spring mechanism that lifts it once you unscrew the bolts? I
haven't
> > studied theanatomy of the side rails too carefully yet. Just
opened
> > up the case and started looking around.
> >
> > I'm sure I'm gonna have to carefully make sure no cables get 
> caught up
> > on anything.
>
> You might need to undo a couple of the heavy wires they use to hold 
> the
> big cable bundles in place.
>
> HOWEVER..................
>
> As I finally realized after tuning CS80s for many years, if you're 
> just
> doing the usual tuning procedure, you don't have to, and shouldn't 
> raise
> the card frame! All the trimmers are accessible with it down. You
just
> need a flashlight and to push the cable bundles up and out of the
way.
> Leaving the cards down should make the temperature change less, so
the
> tuning should hold better when you close up the lid.
>
> David
>
> 



[Non-text portions of this message have been removed]




[Non-text portions of this message have been removed]

honestly, i MUCH prefer just leaving the entire assembly down and tuning that way. i also seem to get a bit more accuracy with it down. using a static wristguard and a plastic tuning piece, i just gently push the wiring above up a little. works fine for me. good luck.

--- On Sun, 4/5/09, omegacode80 <omegacode80@...> wrote:

From: omegacode80 <omegacode80@...>
Subject: [yamahacs80] Raising circuit board rack for tuning
To: yamahacs80@yahoogroups.com
Date: Sunday, April 5, 2009, 11:50 AM











    
            Hi Everyone,



After mastering the M-board tuning procedure on my CS-50 I am now  

ready to tackle the tuning procedure for my CS-80.



Can anyone provide pointers on how to safely raise the circuit board  

rack in to the "tuning" position?  I don't see a procedure for doing  

this in the service manual.



Cheers,



Kent

New York, NY


 

      

    
    
	
	 
	
	








	


	
	


      

[Non-text portions of this message have been removed]