Yamaha CS80

Sorry... Misread your Email.

On the CS50 the___*card*_ you need to look at is R6 I believe.
Terminals FH, and FL

B


On 18/09/2013 10:02, rikard.latvala@... wrote:
>
> Hey,
>
>
> I am working on a CS-50 that had several problems with the trimpots on 
> the M boards. I have installed new ones and replaced them all with 
> multiturn one's. I have almost completed the calibration procedure but 
> hit a problem when i got to the vcf calibration. The CS-80 calibration 
> procedure states that i should get 4.0 Volts moving the cutoff lever 
> on the front panel and measuring at R51 or R52. The only marked 
> resistor i can find on the M boards is R6 and R7, others only have 
> their resistance marked. Any one know witch ones they are talking about ?
>
> At point (FH) F1 on cs-50 i only have 0.003 - 0.12 volts so i can not 
> get the 4.0 volts there no matter how the cutoff lever or trimpot is 
> set. Could it be before the 330 ohm resistor ? (actually a 230 ohm one 
> in the cs-50).
>
> Please help, I really want to close it up and get it back to its 
> owner. I am thinking about gathering all the calibra tion data and 
> make a much clearer procedure as much of the info in the calibration 
> manual is wrong.
>