Hifonics Atlas AXi3003 Owner's Manual page 22

REFERENCE NOTE
PROTECTION CIRCUIT
This amplifier owns a 3-way protection circuit. If overloading, overheating and shorted loudspeakers, or too low
impedance, the amplifier shuts down to prevent serious damage. If one of these malfunctions is detected, the red
PROTECT LED lits up.
Check in this case all connections to detect short-circuits, faulty connections or overheating. Attend the regarding notes
on the previous page.
If the reason for the disfunction is eliminated, the amplifier is ready for operation again.
If the red PROTECT LED does not stop to lit up, a damage on the amplifier consists. In this case return the amplifier
to your car audio retailer with a detailled malfunction description and a copy of the proof of purchase.
WARNING: Never open the amplifier and try to repair it by yourself. This causes a loss of warranty. The repairing
service should be made only by skilled technicians.
REFERENCE NOTE
ELECTRICAL INTERFERENCES
The reason for interferences are mostly the passed cables and connections. Especially the power and audio cables
(RCA) of your sound system are susceptible. Often these interferences are caused by electric generators or other
electrical units (fuel pump, AC etc.) of the car. The most of these problems can be prevented by a correct and careful
wiring.
Here are some courtesy notes:
1. Use only double or triple shielded audio RCA cables for the connection between the amplifier and headunit. A useful
alternative are anti-noise-devices or additional equipment like Balanced Line Transimtters, which are available at
your car audio retailer. If possible do not use anti-noise-filters, which are splicing the ground wire of the RCA audio
cables.
2. Please install if possible the audio cables from the headunit and the amplifier not together with the power supply
wires on the same side of the vehicle. The best is a areal separated installation in the left and right cable channel
of the vehicle. This avoids an overlap of interferences on the audio signal. This also applies for the supplied bass-
remote connection, which should not be installed together with the power supply wires. It is recommended to use
the same side like the audio cables.
3. Avoid ground loops by connecting all ground connections in a starlike arrangement. A suitable ground center point
is ascertainable, by measuring the voltage directly on the vehicle's battery with a multi-meter. Measure the voltage
with turned-on ingnition together with other turned-on power consumers (e.g. headlights, rear window defroster, etc,).
Compare the measured value with the voltage of the ground point, which you have choosen for the installation and
the positive connection (+12V) of the amplifier. If the voltage has just a little difference, you have found a suitable
ground point. Otherwise you need to choose a other ground point.
4. Use if possible only cables with added or soldered cable sockets or the like. Gold plated or high value nickel plated
cable sockets are corrosionfree and own a very low contact resistance.
TROUBLE SHOOTING
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