Audio System US Series Manual

trouble shooting
This power amplifier is featured with an efficient protection system to prevent any damages like over-heating,
overvoltage, short-circuit and DC at the loudspeaker output.
Occuring an error the protection-LED will light in red. In order to check the problem, first turn down all levels of
the head unit, afterwards turn it off.
AMPLIFIER IS NOT
POWERED UP, NO LED IS
LIGHTENING
PROTECTION LED
ILLUMINATES GREEN
WHILE AMPLIFIER IS
SOUNDLESS
PROTECTION LED
ILLUMINATES RED
WHEN AMPLIFIER IS
POWERED UP
OVERHEATING
(PROTECTION LED
ILLUMINATES RED WHEN
AMPLIFIER IS POWERED UP)
ERROR IN AMPLIFIER FUSE
SOUND TOO LOW OR
LOW-DISTORTED SOUND
HIGH HISS-ENGINE NOISE
IN SPEAKERS
Please contact your specialized dealer if the amplifier is still not working after it has been
For warranty adjustement / repairs the original invoice has to be attached!
Opening the power amplifier is leading to a lost of warranty in either case!
- ground connection professional connected?
- +12V / +24 V powercable professional connected?
- remote cable professional connected?
- fuses inserted and alright?
- analyze voltage on the amplifier.
- cinch cable or high level input alrigth and professional connected
- loudspeaker professional connected?
- head unit alright?
- amplifier too hot?
- short-circuit at the loudspeaker output?
- short-circuit caused by loudspeaker cable with vehicle chassi (ground)?
- input voltage too high (e.g.faulty generator)?
- impedance alright?
- loudspeaker error?
- adequate airflow of the amplifier?
After cooling down, the amplifier turns on automatically.
- ground professional connected?
- loudspeaker impedance alright?
Make sure when changing fuses to use the same value.
- input level control "GAIN" is set to match the head unit?
- output level control of the head unit alright?
- loudspeaker error?
- loudspeaker cable checked?
- crossover frequencies has been properly set?
(Check head unit, amplilfier, DSP, soundprozessor, equalizer,
frequency bandpassfilter...)
- ground connection professional connected?
- short-circuit caused by loudspeaker cable with vehicle chassi (ground)?
- cinchcable ( RCA) and/or loudspeaker cabel installed too
close to the power connection cable?
- cinch ground (RCA) of the head unit alright?
ATTENTION
checked with the error list!
-4-
! CAUTION !
! CAUTION !