TROUBLESHOOTING----------------------------------------------------------------------------------------- __
The output volume fluctuates or drops:
• Take all effect devices (infront of the preamp and FX Loop) out of the signal chain.
• Check all used cables.
• Check the used guitar or use another guitar.
• Use a patch or guitar cable to patch he FX Send with the FX Return jack.
• Try using an external and functional power amp with the preamp of the amp (FX Send connected
to an external power amp) to exclude a problem with the amp´s internal preamp.
• Try using an external and functional preamp with the poweramp of the amp (FX Return connected
to an external preamp) to exclude a problem with the amp´s poweramp.
The amp is not providing a proper output signal / no or low sound is emanating from the speaker:
• Is at least one speaker connected to the speaker outputs?
• Is the power amp activated ( Stand By switch to ON)?
• Are all cords (guitar, effects and speaker) connected properly and are they functional?
• Take all effect devices (before the preamp, FX Loop) out of the signal chain.
• Is the Noise Gate activated? (Relevant only, if the amplifier is equipped with a Noise Gate).
• Are the Master knob and the Gain and Volume knobs set to a value higher than 0? If any of these
knobs is set to zero, no signal is routed to the amp´s output.
The speaker is emitting humming noises:
• The amp and mains ground are not connected properly or are altogehter disconnected. Please
have this checked by a technician.
• Cords connected to the input or FX Loop may not be shielded properly. Replace them to check if
this is indeed the case.
• The amp or speaker cords may be picking up interferrence from powerful magnetic fields (i.e., of
nearby power transformers or electrical motors). Reposition the amp and connector cables.
• The amp or speaker cords may be picking up radio signals. For example, from activated mobile
phones or powerful local transmitting stations nearby. Switch off mobile phones while
troubleshooting noise problems.
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