Yamaha CS80

yes, this is a great group/list. i cant imagine trying to maintain a cs80 without it, as we all dont have the option of a local synth tech!

one question for you guys: i've got some new IG chips coming in to replace what i believe are dead chips. my plan is:
1-take out a properly working M-board
2- measure voltage on all pins of VCO, VCF, and EG chips so i know what SHOULD be coming in/going out.
3-check voltage on the sockets of the non-working m-boards before putting in new IG chips.

am i missing anything here? any advice?

thanks a bunch, guys.


"JH." <jhaible@...> wrote:                               > It is fine to work on the boards live, removed from the card cage.  I do 
 > it all the time and never had a problem; as you surmised, the power > 
 > supplies also are routed to the boards through wires.
 
 Thank you Kyle! Now that you say it, I think I have done it on the CS-50, 
 too. But that has been ages ago, and the CS50 only cost me the equivalent of 
 300 Dollars. :) So I thought I better be sure before taking any risk on the 
 '80!
 
 >JH it is awesome that you finally have an '80!  I and many others are 
 >looking forward to your insights as you delve inside it.
 
 Thanks for your nice words. Yes, I love to modiy and also to share the mods.
 But for the near future, it will be all the other way round: taking all the 
 advice I can get from the experts on this list to fix all the little bugs.
 I'm glad the synth is in such a great shape overall, and especially on the M 
 boards, and holds its tuning.
 With a little help of my friends here, I'll certainly fix the other things.
 
 What a great list this is!
 
 JH.
 
 -------------- Original message -------------- 
 From: "JH." <jhaible@...>
 
 > When I want to measure on an individual board (like the PRA board) - can I
 > do this outside the card cage?
 >
 > I know the mounting screws carry +15V and GND, but there's also cables
 > running to the board for +15V and GND, so it should be possible to remove
 > them, turn the CS-80's power on, and measure on the boards- right ?
 >
 > Please confirm, or stop me from making anything stupid ...
 >
 > JH.
 >
 >
 >
 >
 > Yahoo! Groups Links
 >
 >
 >
 
 
     
                               

       
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