Clarion APX2121E Stereo Amplifier User Manual


 
15
6. TROUBLESHOOTING
No Audio
Low or no remote turn-on voltage: check remote connections at the amplifier and
source unit.
Blown amplifier fuse: replace with a new fast-blow fuse (same rating).
Power wires not connected: check battery and ground wiring at the amplifier and
check the battery connections.
Speaker leads shorted: check speaker continuity to ground; it should not show a
common ground.
Speakers not connected or are blown: check speaker connections at the
amplifier; measure coil impedance.
Audio cycles on and off
Thermal protection circuits are shutting the amplifier off.
Check the location for adequate ventilation. Consult an authorized Clarion audio
dealer.
Distorted audio
Gain is not properly set or the speaker cones are damaged.
Review the instructions for setting the gain. Inspect each speaker cone for signs
of damage, such as a frozen cone, burning smell, etc.
Amplifier fuse keeps blowing
The wiring is connected incorrectly or there is a short circuit.
Review the installation precautions and diagram in this manual and check all
wiring connections.
Whining or ticking noise when engine on
The amplifier is picking up alternator or radiated noise.
Turn down input gain.
Move the audio cables away from the power wires.
Check the power and ground connections on the amplifier and install an in-line
noise filter on the source unit’s power wire.
Check the alternator and/or voltage regulator. Test for a weak battery or add
water to the battery.