3
Power interlock
Your FY-2 Fuzz pedal features a two stage power interlock which is designed
to preserve the battery, and also to permit the use of an external power
adapter.
In the first stage, the battery ground circuit is interrupted unless there is a plug
in the "In" jack on the left side of the pedal. If there is no plug in the "In" jack,
then you will not be able to power up the pedal using a battery.
The only type of plug which will work with this circuit is
a conventional 1/4 inch mono, or "tip-sleeve" (TS) plug,
which is standard on most instrument cords. The
interlock circuit will NOT work with a stereo, or "tip-
ring-sleeve" (TRS) plug.
NOTE: The original Shin-ei FY-2 had the battery interlock circuit on the
"Out" jack, rather than the "In" jack. We used the "In" jack because this is
the convention with most modern effect pedals. If you have an original
Shin-ei pedal then you should note this difference. Removing the plug
from the "Out" jack will not disconnect the battery in the Wattson FY-2
Fuzz pedal.
In the second stage, the +9VDC circuit from the battery is interrupted
whenever there is a plug in the "9VDC" external power supply jack on the right
side of the pedal. This allows you to operate the pedal on an external adapter
without also drawing current from the battery. You cannot operate the pedal
from the battery if there is a plug in the "9VDC" external power supply jack.
When operating from a battery the FY-2 Fuzz will draw a small amount of
current anytime the interlock circuits are closed, even if the pedal is in
"bypass" mode and the effect is not switched on. It will draw even more
current when the effect is on and the LED is lit up. The fuzz circuit is not
powered down when the effect is switched off in order to avoid any power up
delays when you switch on the effect.
To make this a little more clear...
If you have installed a battery, and have inserted an instrument cord plug into
the "Input" jack, and have NOT inserted an external power supply plug into the
"9VDC" jack, then the pedal will draw some current from the battery. If you
want to preserve your battery power then you should open the interlock
connection when the pedal is not in use, either by disconnecting the plug from
the "Input" jack, or by inserting a plug into the "9VDC" external power supply
jack. Either method will disconnect the battery from the fuzz circuit, and help
to conserve battery power.
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