Troubleshooting - Clarion XC7420 Owners & Installation Manual

7. When replacing the amplifi er or power wire fuse, always use a fuse with the same
amperage rating. Substituting a higher rating fuse or a slow-blow type can result in
serious damage to the amplifi er or vehicle.
8. When creating passage holes for power wire, interconnect cables and speaker wires,
use grommets and wire loom to eliminate any sharp edges created during drilling.
This will protect the wire from being damaged and help to prevent a short circuit.

TROUBLESHOOTING

Problem
Amplifi er will not turn
on - Power LED off
Audio stops playing
Amp shuts off at high
volumes
Distorted Audio
Fuse Blows
Whining or ticking
noise
Solution
- Using a digital multi-meter, check for 12V at the +12V
and REM Connections when referenced to the amp ground
connection.
- If the Auto Sensing circuit is being used, try reversing the +
and - connections to the High Level RCA Adapters
- Thermal protection circuit has shut down amp to protect
the circuitry. Ensure there is adequate ventilation around the
amplifi er.
- Fuse at the battery or amplifi er is blown. Inspect and replace
as required.
- Amplifi er is loaded below the rated impedance limit. Check
wiring and reconfi gure as required.
- Amplifi er may not be getting enough power from your vehicle
electrical system. Ensure that during operation, the voltage at
the amplifi er does not drop below 10.6V. Clarion recommends
at least 4 AWG Pure Copper power wire for both +12V and
GND connections.
- Input gain is not set properly. Adjust as per instructions.
- Source signal is distorting. Reduce source output level.
- Speaker is damaged. Replace as necessary.
- Amplifi er output may be shorted. Check all wiring.
- Amplifi er may be damaged. Remove all speaker wires
and check functionality. If the fuse blows with no speaker
connection, contact the Clarion Service Department.
- The amplifi er may be picking up electrical noise that is
traveling on the ground shield of the interconnect.
1. Check for solid ground connections at the source unit and
amplifi er.
2. Run a ground wire from the amplifi er to the source unit.
3. Re-route the interconnect cables away from sources
of electrical noise. Ensure you are using good quality
shielded interconnects.
- A speaker wire or a passive crossover network may be
picking up electrical noise. Reroute wiring as needed.
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