Operation Manual

41
Problem Cause
No music signal on loudspeakers ● + 12 V and/or GROUND (GND/ -12V) and/or “Remote” line not (properly)
and STATUS-LED on amp is off 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 overheated
A high-pitched buzzing sound ● 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 ● Sign of ground loop(s), i.e. multiple ground connections of the car audio
installation or parts thereof.
● 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. In case the cause for protection shut-off has been eliminated, the amplifier will operate normally again
(LED on). Otherwise the amplifier will continue to switch on and off!
TROUBLESHOOTING
H
C109-509 Manual DEF.indd 41C109-509 Manual DEF.indd 41 15.02.2005 15:30:35 Uhr15.02.2005 15:30:35 Uhr