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3.3.2
CLASSIC 300 TROUBLESHOOTING
Display Message
Power supply failure!
Amplifier failure!
Cabinet not connected!
Cabinet impedance/short!
Temp too high!
V(#) tube failure!
Main voltage too low!
Main voltage too high!
Markbass
Classic 300
Amp Management System V#.#
Tube heating
Long Life – biasing..###
High Fidelity – biasing..###
Ready
Standby
Mute
10
Error: the amplifier doesn't start-up Warning: the amplifier keeps functioning Message: operating messages
Type
Error
Error
Error (until you connect a
cabinet)
Error (until you connect correctly
to a suitable cabinet)
Error (until the temperature
decreases)
Warning
Warning
Warning
Message
Message
Message
Message
Message
Message
Message
Message
Explanation
The power supply has failed. Contact an authorized technician for repair.
The power amplifier has failed. Contact an authorized technician for repair.
No cabinet is connected to your amplifier.
The impedance of your cabinet/s is too low, or there is a short circuit. Check your
connection and/or your cabinet/s.
The temperature inside the amplifier has reached an unsafe level.
Make sure the amplifier is properly ventilated.
One or more tubes are not working correctly or have failed.
You should have the tube/s replaced by an authorized technician as soon as possible.
Main power supply voltage is below the nominal value by 10% or more.
Main power supply voltage is above the nominal value by 10% or more.
Startup message
Software version. This message appears during startup.
Duration: 32 seconds. This message appears during startup. A progress bar shows the
time remaining until the amp is ready to use.
Duration: approximately 10 seconds. This message appears during the power tube biasing
phase, when Long Life mode has been selected.
.
Duration: approximately 10 seconds. This message appears during the power tube biasing
phase, when High Fidelity mode has been selected.
This message appears after the biasing phase, when the amplifier is working properly and
ready for use.
You have selected standby mode. Press standby again when you're ready to use the amp.
You have selected mute mode. Use the footswitch to deactivate mute mode when you're
ready to use the amp.
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