Markbass Little Mark 250 Black Line User Manual
Page 7
07
8. TROUBLESHOOTING TIPS
THERMAL PROTECTION
SYMPTOM
The amp gets hot and shuts down.
PROBABLE CAUSE
The amp has overheated, either as a result of inadequate ventilation or a damaged cooling system fan. When the amplifier cools down to a safe level, the amp will automatically restart.
SUGGESTIONS
Please verify that the fan is working properly, and that the cooling system ports are not obstructed.
CURRENT PROTECTION
SYMPTOM
The amp turns on, but there is no signal coming from the speaker/s.
PROBABLE CAUSE
Low impedance load (minimum impedance for Markbass amps is 4 ohms), or a bad speaker cable.
SUGGESTIONS
Please verify the impedance of the speaker/s connected to the amp. Note that two 4 ohm cabinets, or an 8 ohm and a 4 ohm cabinet, will result in an impedance below 4 ohms.
Please check the speaker cable/s.
After checking these two things, please turn the amp off and turn it on again.
If the troubleshooting steps outlined above do not solve your problem, please contact your Markbass distributor/dealer for service information.
For more TROUBLESHOOTING TIPS, please check the FAQ section on the SUPPORT page of our website at www.markbass.it.