Rockville USS10, Manual

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Troubleshooting
If you experience operation or performance problems with this product, compare your nstallation 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 Check to make sure you have a good ground connection.
Check that the Remote Input (Turn-On) has at least 3VDC.
Check that there is battery power on the (+) terminal.
Check that there is at least 12v.
Check all fuses, replace if necessary.
Make sure that the Protection LED is not illuminated. If it is lit, shut off the amplifier briefly, and then repower it.
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 faultylnoisy
component is found.
It is best to set the amplifier's 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 volume as high as possible (without distortion) and the amp input
level as low as possible.
Check that all fuses are OK.
Check that unit is properly grounded.
Check that the Remote Input (Turn-On) has at least 3VDC.
Check that the RCA audio cables are plugged into the proper inputs.
Check all speaker wiring.
Reset the Level Control.
Check the Crossover Control settings.
Check for improperly grounded RCA interconnects.
Check that the Input Level Control is set to match the signal level of the head unit. Always try to set the Input Level
as low as possible.
Check that all crossover frequencies are properly set.
Check for short circuits on the speaker leads.
Check that the minimum speaker impedance for the amp model is correct.
Check that there is good air circulation around the amp. In some applications, it may be necessary to add and
extemal cooling fan.
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.
Turn down the volume control on the head unit to prevent overdriving.
Reset the amplifier. lf the Protection LED still comes on, then the amplifier is faulty and needs servicing.
POSSIBLE REMEDY
Protection LED comes on
when amplifier is powered up
No output
High hiss in the
Low output
Squealing noise is present
Distorted sound
Amplifier gets very hot
Engine noise (static type)
Engine noise (alternator whine)