SoundMax SM-SA604 - Manual (Page 14)

14
Troubleshooting guide
Before you consult this listing, make sure the vehicle’s electrical system is working properly by verifying
that other electrical items (e. g. headlights, Windows, etc.) still function correctly.
SYMPTOM PROBABLE CAUSE SOLUTION
Low or N.C. remote turn-on
connections
Check remote turn-on voltage at amp and head
unit
Blown fuse Replace with new fast-blow fuse
Power wires not connected
Check butt splices or solder joints;
Check ground and battery connections
No audio
Blown or non-speakers connected
Use VOM or DVM to measure speaker coil
impedance; check speaker wiring connections
Input sensitivity not set properly
or damaged speaker cones
See adjustment procedure and check each step;
inspect each speaker for damage and repair or
replace suspected component
Distorted
audio
Low turn-on voltage Refer to head unit owner’s manual
Audio level
low
Mute circuits is on head unit
Check electrical system for low voltage;
Check ground connection
Audio lacks
Speakers wired with wrong
polarity, causing cancellation of
bass frequencies
Check polarity of wires from amplifiers to each
speak as defined by the system design;
Check battery voltage at amplifier during operation
External fuse
blowing
Incorrect wiring or short circuit
Refer to electrical installation and check each
installation step
Whining noise
on audio with
engine
running
Amplifier is picking up alternator
noise
Install line noise filter on the head unit power wire;
Check alternator routing diodes or voltage
regulator for proper operation. Check all grounds,
check battery voltage, check RCA cables
Ticking noise
on audio with
engine
running
Amplifier is peaking up radiated
spark noise
Check RCA audio cable; Install an in-line noise
filter on the head unit’s power wire, check spark
plug wires