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TrOUBLESHOOTInG
Problem .
No music signal on loudspeakers
and STATUS-LED on amp is red or off
A high-pitched buzzing sound
in- or decreasing with engine speed
Crackling sound in- or decreasing
with engine speed
Humming
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 . o n) . . O therwise . t he . a mplifier . w ill . c ontinue . t o . s witch . o n . a nd . o ff! .
A1350-495 Manual D+E+F.indd 33
All manuals and user guides at all-guides.com
Cause .
● + 12 V and/or GROUND (GND/ -12V) and/or "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 overheated
● Bad ground (GND) conntact of amplifier or head unit
● Insufficiently shielded RCA interconnects and/or bad RCA cable routing
(inductive interference of on-board electronics)
● Insufficient interference elimination of ignition circuitry
● 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
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07.09.2007 12:23:51 Uhr
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