7-4
Troubleshooting
Common Problems
A dual switch pedal must be wired as shown below. Any other wiring pattern will not
work correctly. In in doubt, check the Switch Pedal diagnostic described on page 7-7.
Figure 7-1 Switch Pedal Wiring Diagram
Control Pedal Problems
If you are having problems making a control pedal work properly, give these a try:
¥ If the pedal works backward, operates very abruptly (more like a switch), or not at
all, itÕs most likely a wiring problem. See discussion below.
¥ When using adapter cables to adapt a pedal with two mono cables, verify that the Y
adapter is a stereo splitter type and not just a Y adapter designed to plug two
headphones into a single jack.
¥ Volume pedals typically wonÕt work well because of impedance or taper problems.
See below for details. ÒActiveÓ volume pedals wonÕt work at all.
The control pedal must be wired to a single stereo 1/4-inch plug as follows:
¥ Wiper to Tip connection of 1/4-inch plug
¥ Top end of resistance element to Ring connection
¥ Bottom end of resistance element to Sleeve connection
These connections are shown schematically below:
Figure 7-2 Control Pedal Wiring Diagram
Left
Pedal
Right
Pedal
Sleeve
Tip
Ring
1OK Ohms
Increasing Foot Pressure
Linear Taper
Sleeve
Tip
Ring
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