Troubleshooting - Cerwin-Vega Vega Series User Manual

Troubleshooting

Troubleshooting
If you experience operation or performance problems with this product, compare your
installation with the electrical wiring diagram on the previous pages. If problems persist,
read the following troubleshooting tips which may help eliminate the problems.
SYMPTOM
Amplifier will not
power up.
Protection LED
comes on when
amplifier is
powered up
No output.
Low output.
High hiss in the
sound.
Squealing noise
is present.
Distorted sound.
Amplifier gets
very hot.
Engine noise
(static type)
Engine noise
(alternator whine)
10
POSSIBLE REMEDY
Check to make sure you have a good ground connection.
Check that there is at least 12v on the battery (+) terminal
Check that the Remote Input (Turn-On) has at least 10VDC.
Check that the green power LED is lit
Check all fuse, replace if necessary.
Make sure that the Protection LED is not illuminated. If it is lit, shut off
the amplifier briefly, and then Power Cycle (reset).
Turn down the volume control on the head unit to prevent overdriving
the input speaker leads,
Try Power cycling (reset) the amplifier. If the Protection LED still comes
on, then the amplifier is faulty and needs servicing
Check that all fuses are OK.
Check that the power light in on
Check that unit is properly grounded.
Check that the Remote Input (Turn-On) has at least 10VDC.
Check that the input signal connections are plugged in properly.
Readjust the Input Gain Control.
Check the Crossover Control settings, possibly try a higher frequency.
Disconnect all RCA inputs to the power sub's control panel. If the hiss
disappears, then plug in the component driving the amplifier and
unplug its inputs. If the hiss disappears at this point, go on until the
faulty/noisy component is found.
Reset Input Gain. It is best to set the subwoofers input level control as
low as possible. The best subjective signal-to-noise ratio is achieved in
this manner. Try to set the head unit as high as possible (without
distortion) and the subwoofer input level as low as possible.
Check for improperly grounded RCA interconnects. Or possible "blown"
signal ground from headunit. (Some headunits are notorious for this!)
Check that the Input Gain control is set to match the signal level of the
head unit. Always try to set the Input Gain on the subwoofer as low
possible. Input gain is NOT power output!! Check that all crossover
frequencies are properly set.
Readjust the Input Gain Control.
Make sure to NOT use CCA power wire as it will cause these issues
This is usually caused by poor quality RCA cables, which can pick up
radiated noise. Use only the best quality cables, and route them away
from power cables.
Check that the RCA grounds are not shorted to the vehicle chassis
Check that the head unit is properly grounded.