Quilter 101 Mini Reverb User Manual - page 12
12
Symptom
Action
Pilot light is on, but no
sound (using a guitar)
• Confirm that the MASTER control and the GAIN
controls are both turned up.
• Ensure the guitar plug is fully seated at each
end.
• Try using a different guitar cable.
• Check that the pickup selector switch and vol-
ume on the guitar are set correctly.
• Try a different instrument or audio device.
• Ensure that the rear panel speaker plug is fully
inserted into the SPEAKER jack.
• Try headphones, to see if the speaker is bad.
Weak or fluctuating audio
• Plug guitar directly into amp and unplug the FX
Loop to isolate bad pedals. Check connections
and power supply or batteries in pedal board.
• The amplifier almost never “loses power”
without completely stopping. Look for external
causes.
Background hum
• Ensure the guitar plug is fully inserted.
• Try using a different guitar cable. Make sure it is
properly shielded.
• Any AC powered sources or effects should be
plugged into the same receptacle or AC strip as
the amplifier to help avoid ground loops.
If the hum goes away when you turn down the
guitar:
• Single coil pickups can pick up hum, especially
from light dimmers or neon lights. Some guitars
have “phase switching” pickup selectors that can
sometimes help.
• Check that the guitar’s cavities are well shield-
ed.
• A thin “buzz” especially at partial guitar volume
may indicate that the AC cord’s ground pin has
been defeated. This is dangerous and leads to
noise.
Excessive noise
• At high gain settings, some audible hiss or
whoosh is normal.
• Check your cables, guitar and other effects in
the signal chain, especially for hum or buzz.
• “Chattering” and other recurring noises are
usually caused by cellphones close to the guitar
or amp.
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