Troubleshooting - Boss ME-20 Owner's Manual

Troubleshooting

"bt" Appears in the Display
→ Batteries are run down. Replace with new
batteries (p. 11).
Power does not turn on
❍ Is the correct AC adaptor (PSA series; sold
separately) properly connected?
→ Check once more to confirm the adaptor is
connected (p. 12).
Never use any AC adaptor other than the
adaptor specified.
❍ Has the battery run down?
→ Replace with new batteries (p. 11).
* The batteries included with the ME-20 are intended
only for confirming that the unit is functional.
* This unit consumes a large amount of current, so the
use of an AC adaptor is recommended. If using
batteries, use alkaline-type batteries.
* To reduce battery consumption, be sure to
disconnect the plug connected to the INPUT jack
whenever the unit is not in use.
❍ Is the plug properly connected to the INPUT
jack?
→ Check the connection once again (p. 12).
* The power will not turn on without a plug
connected to the INPUT jack.
No Sound/Volume is Low
❍ Are the other devices properly connected?
→ Check the connection once again (p. 12).
❍ Can you hear sound through the headphones
when headphones are connected?
→ If you can hear sound, there may be a short in
the cable used to connect the amp or other
device, or a mistake in an external device's
settings. Check the connecting cables and
external devices once more.
❍ Could the MASTER LEVEL knob be turned
down?
→ Use the MASTER LEVEL knob to raise the
output volume.
❍ Could the levels for OD/DS or EQ be too low?
→ Use the parameter knobs to raise the levels.
36
❍ Is the volume turned down?
→ Check the volume levels on any connected amp
or mixer.
Check "LEVEL" and other volume parameters
to make sure no volume setting is too low.
❍ Could the level have been lowered with the
expression pedal?
→ When the pedal is set to function as a volume
pedal, sounds are not output when the toe of
the expression pedal is in the raised position.
❍ Is the ME-20 in Tuner mode?
→ In Tuner mode, the bypassed sound is output,
and the expression pedal functions as a volume
pedal. In this case, sounds are not output when
the toe of the pedal is in the raised position.
❍ Could you be using a cable with an embedded
resistor to connect a CD or MP3 player to the
AUX IN jack?
→ Use of a cable that contains a resistor may make
sound from connected devices inaudible.
Patches Cannot Be Switched
❍ Is the ME-20 in Memory mode?
→ In Memory mode, the display indicates the
bank, the pedal indicators show the current
patch, and the effect-select indicators light.
Conditions other than these mean the ME-20 is
in another mode, so patches cannot be changed.
First switch the ME-20 to Memory mode, then
continue (p. 23).
The Expression Pedal Switch
Cannot Be Turned On or Off
The Volume Pedal Cannot Reduce
the Volume Completely
❍ Could the expression pedal be out of
adjustment?
→ Although the unit's expression pedal has been
set for optimal operation at the factory,
extended use and certain operating
environments can result in the pedal going out
of adjustment.
Adjust the expression pedal (p. 30).