16
TROUBLE SHOOTING GUIDE
SYMPTOM
PROBALE CAUSE
4. When the engine is running, the audio
system emits a radiating noise that re-
mains unchanged or disappears when
the volume is increased.
5. When the engine is running, the audio
system emits a radiating noise that in-
creases or decreases with the volume of
all program sources (for radio, tape or
CD).
6. When the engine is running, the audio
system emits a whining noise that in-
crease or decreases ONLY with the vol-
ume.
7. Obvious distortion at low volume.
8. Overall sound effect is good, but bass is
abnormal (more bass at the two extreme
settings of the balance control than at
the center setting).
replace the entire speaker cable or re-
insulate any exposed wire with electri-
cal tape.
•
Check all the +power cables to see if
they are connected correctly.
•
Check all the ground connections of
the entire system for good contact with
bare metal of the vehicle chassis.
•
Check whether the source unit and the
electronic crossover are connected to
the vehicle ground at the same refer-
ence point.
•
Install a 10 amp in-line filter on the red
power cable of the mobile electronic
crossover.
•
If the noise persists, check the three-
phase current diodes and the voltage
regulator.
•
This is commonly known as “radiated”
noise. It is NOT caused by the mobile
electronic crossover and thus is be-
yond the scope of this manual. Please
contact your local retailer/installer for
assistance.
•
Output level of various channels is not
compatible, refer to section entitled
FINAL SYSTEM CHECK.
•
The subwoofers are “out-to-phase” with
each other, thus canceling the bass
when the balance control is at the
center position. Check the wiring from
the amplifier to the subwoofers (posi-
tive “+” to positive “+” and negative “-” to
negative “-”)
