Vintage Synth Repair

It's the EL-foil. My Casio FZ-1 sampler display did the same thing, 
that high pitched squeal, and it would totally lock up my keyboard. I 
disconnected the backlight, and no more problems. Got a new one, ran 
fine, the inverter worked fine. 

I've been meaning to work on making a LED backlight when I get time, to 
save this hassle, as the FZ-1 is notorious for dying backlights.

Cheers, Graham

--- In vintagesynthrepair@yahoogroups.com, "ambrosia800" <s_carter@...> 
wrote:
>
> Thanks, Heiko! 
> 
> I just tried a few things. Result:
> 
> I disconnected the plug on the PSU board that is leading towards the 
> backlight. -> No Noise anymore! I never heart such a silenced 
> Wavestation.... ;-)
> Also no light... of course... 
> 
> So, it seems to be the EL-foil or the inverter. 
> I think I have to get some EL-Foil and give it a try.
>