9
TROUBLE SHOOTING
No power led on, no output
• Check +1 2V and GND connection
• Check remote signal +1 2V
• Check the external fuses or built-in.
Power led on, no output
• Check source unit for output
• Check input gain control
• Check RCA cable ® Check speaker and wiring for shorts
• Check for damaged speakers
No sound on one channel
• Swap le/right input to check source
... If sound swaps too, source or signal cable is bad
• Swap le/right speaker to check speakers
... If sound does not swap, speaker or speaker wiring is bad ... In any case, consult
authorized dealer
Amplier goes in protection mode at higher gain
• Check speaker impedance ( MILLE, MEZZO, RAPID, AURORA & APOLLO ) is
lohm for single unit and 2ohm for link connection.
• Check working voltages ( 8,5Volts - 1 6Volts )
• Check speaker wiring for short circuit
Engine or alternator whine noise
• Check wiring, make sure RCA cables are not run parallel on same side of vehicle as
power cable.
• Check any preamps or black boxes in the signal path between source unit and amplier
• Make sure ground pin ( shield or outer barrel of rca cables ) have not lost connection
and that source unit has good reference ground.