I have 2 FC7 pedals (none of which I have tried on my CS80)... the original pedal uses a lightbulb and photocell with a teardrop hole shaped shutter between the 2 elements. At the narrow end of the shutter, no light passes to the photo cell and as you move the pedal/shutter so the round side of the teardrop is between the 2 elements, the photo cell receives full light and the circuit changes... there is a voltage in a cs80 that lights the bulb all the time whether it is low or high in position... there is the third connection which is the output of the photo cell... I had a misfortune about 12 years ago where my Optical pedal had a short inside the male 1/4 jack.... the short took out a ground rail inside my cs80 as a fuse.... you are lucky your pedal burned up..... retracing the burnt ground rails was close to a thousand dollars in the shop. remember... that jack has a voltage
being sent to power a bulb all the time... the optical coupler circuit should not be carrying voltage...
How people claim the FC7 pedal should work is not an option I would care to risk....
-----Original Message-----
From: joachim.milson <
joachim.milson@...>
To:
yamahacs80@yahoogroups.comDate: 05/19/13 05:20
Subject: [POSSIBLE SPAM] [yamahacs80] FC7 pedal on CS80 : beware!
Hi All,
Whether the FC7 pedal control is compatible with the CS80 is not
completely clear from what can be read here and there on the web.
I had a "shocking" experience with mine that I want to share.
I have a CS60 on which both FC3 and FC7 work OK. So I was rather
confident when I decided to plug the jacks of the two pedals in my newly
acquired CS80.
When I switched the CS80 on, a two seconds light "shhh" could be heard.
No smoke from the CS80, however.
A bit worried, I checked everything but there was no sign of the CS
being "wounded". So I dared to play a few notes : the CS80 was still
able to sing. (very deep sigh of relief then!)
The emotion being away, I decided to check the FC3 (pedal switch) and it
worked as expected. But with the FC7, nothing happened. Only when I
disassembled the FC7 did I realize how lucky I was.
The carbon track of the FC7's potentiometer was burnt. The carbon track
worked like a fuse.
Look here for the evidence : FC7 burnt potentiometer
<
http://groups.yahoo.com/group/yamahacs80/photos/album/714107855/pic/152\8156028/view>
Why some users apparently don't have any problem with their FC7
connected to the CS80 whereas others do?
Can someone shed some light there?
Joachim
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