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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 red or 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
G
A1350-495 Manual D+E+F.indd 33
07.09.2007 12:23:51 Uhr