Clarion APA4203 Operation & Installation Manual page 20

Clarion APA4203/APA4I62
TROUBLESHOOTING (CONT'D)
Symptom
Cause
Solution
No audio
Low or no remote
Check REMOTE wiring
Speakers not
connected or
are blown
Check speaker
connections at amplifier;
measure coil impedance
Audio cycles
on and off
Thermal protection
circuits are shutting
amplifier off
Check location
for adequate ventilation;
consult an authorized
Clarion dealer
Distorted audio
Gain is not set
properly, or damaged
speaker cones
Review Setting Gain
on page 17; inspect each
speaker cone for signs of
damage (e.g., frozen cone,
burning smell, etc.)
Audio lacks punch
Speakers wired
incorrectly, which
causes cancellation
of bass frequencies
Check polarity of wires
from amplifier to each
speaker as defined by the
system design
Amplifier fuse
keeps blowing
Incorrect wiring
or short circuit
Review Installation
on page 14 and check all
wiring connections
Whining or ticking
noise in the audio
with engine on
Amplifier is picking
up alternator noise or
radiated noise
Check power and ground
connections on amplifier;
check or move audio
cables; install an in-line
noise filter on source
unit's power wire; check
alternator and/or voltage
regulator; test for weak
battery or add water
to battery
20 ♦ Troubleshooting