Mutant MT1202R, User Manual, Page: 20 / 24

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is a brand name of Armour Automotive Ltd.
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AMPLIfIER DOES NOT TURN ON.
• Check power terminals at the amplifier with a multi meter. The +12V terminal should show
12 volts at all times if it does not check the connection at the battery and also check the in
line fuse and the fuses in the amplifier.
• Remote terminal should display 12 volts when the stereo is switched on if it does not check
the voltage at the stereo remote output terminal if there is no output then there is a fault
with your stereo if there is output and the wire is correctly connected then there may be a
break in the wire please check and replace if necessary.
• Check the GND terminal - this should display -12 volts (earth) if it does not please check
the earthing point of the wire. Make sure the wire is not loose and that the metal surface is
clean and free from paint and debris.
AMPLIfIER TURNS ON BUT NO SOUND:
• Check speaker wires are connected at the amplifier and the speakers. Make sure the
crossover switches and dials are set correctly.
• Make sure the Gain control is set correctly.
• Make sure the speaker wires are not shorted to earth or each other (this should be checked
with a multi meter or alternatively unplug one wire at a time to see if the amplifier turns
on).
• Check that the signal input leads are correctly connected at the amplifier and stereo if
applicable.
• Make sure all external crossovers or equalizers are set correctly.
AMPLIfIER TURNS ON BUT LED ILLUMINATES RED:
• Check that no speaker or signal cables are shorted or pinched behind a panel.
• Check that the amplifier is not extremely hot if it is allow it to cool and ensure that speaker
impedances are correct and that the amplifier has adequate airspace around it.
NO OUTPUT fROM ONE CHANNEL:
• Check all signal and speaker cables are correctly connected.
• Check balance on stereo.
• Swap the input left and right channels around and see if the problem changes to the other
side if so then the problem is with the signal cable or source unit.
• Swap the speaker outputs round and see if the problem switches sides if so it is a fault with
a speaker or speaker wiring.