AXTON A1390, Installation & Operating Instructions Manual

Page: 36 / 58

36
Problem Cause
No music signal on loudspeakers
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+ 12 V and/or (GND/ 0V) and/or “Remote” line not (properly) connected
and STATUS-LED on amp is red or off
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Fuse on amplifier blown
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Main Fuse on car battery side blown
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Short-circuit on any of the speaker outputs
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DC voltage at speaker outputs
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Amplifier overload
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Amplifier overheated
A high-pitched buzzing sound
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Bad ground (GND) conntact of amplifier or head unit
in- or decreasing with engine speed
●
Insufficiently shielded RCA interconnects and/or bad RCA cable routing
(inductive interference of on-board electronics)
Crackling sound in- or decreasing
●
Insufficient interference elimination of ignition circuitry
with engine speed
Humming
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Sign of ground loop(s), i.e. multiple ground connections of the car audio
installation or parts thereof.
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Check also ground connections of all other audio components conncected
imPOrTAnT! The amplifier’s protection circuitry will shut-off the amplifier in case of short-circuit, overload or DC offset at the
speaker out-puts or in case of overheat (lED red). in case the cause for protection shut-off has been eliminated, the amplifier
will operate normally again (lED green). Otherwise the amplifier will continue to switch on and off!
TrOUBlESHOOTing
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