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Problem Cause
No music signal on loudspeakers + 12 V and/or GROUND (GND/ -12V) and/or
and POWER-LED on amp is off
“Remote” line not (properly) connected
Fuse on amplifier or distributor blown
Main Fuse on car battery side blown
Short-circuit on any of the speaker outputs
DC voltage at speaker outputs
Amplifier overload
Amplifier overheat
A high-pitched buzzing sound
Bad ground (GND) conntact of amplifier or head unit /CD/MD-changer
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 Sign of ground loop(s), i.e. multiple ground connections of the car audio
installation or parts there of.
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. There will be an automatic re-start after approx. 5 sec. In case the cause for protection shut-off has been
eliminated, the amplifier will operate normally again (LED on). Otherwise the amplifier will continue switching-off!
TROUBLESHOOTING
H
