Boss V-Wah PW-10 Owner's Manual page 36

Troubleshooting
Noise is produced:
Is the guitar connected correctly to the
INPUT jack?
When using an AC adaptor, the power is
turned on even if no plug is inserted in the
INPUT jack. Therefore, noise is produced
if nothing is connected to the INPUT jack.
First connect all of your gear correctly, then
turn on the power to all of the devices.
Pedal not working normally:
Is there any debris or other foreign mat-
ter between the pedal and the PW-10?
Check the underside of the pedal. If there
is nothing unusual there, reset the pedal
sensitivity (p. 31).
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The unit immediately switches
out of bypass:
Are you moving the pedal or any knob
after setting bypass?
Moving the pedal, knobs, or other con-
trols switches the PW-10 out of bypass
mode.
The volume level of the instrument
connected to INPUT jack is too low:
Could you be using a connection cable
that contains a resistor?
Use a connection cable that does not con-
tain a resistor.