Troubleshooting; Possible Cause - Signat ROM2 Bedienungsanleitung

4.4

Troubleshooting

Condition

Possible Cause

No sound Low or no remote turn on
voltage, or no remote turn
POWER indicator
on connection
unlit
Blown fuse(s)
Wiring problems
Blown speakers
No sound Wrong alignment of filters.
POWER indicator lit
Defect speaker or
incorrect speaker wiring
Amplifier shuts Protection circuit
down protecting against
overheating or overload
POWER indicator
unlit
Distortion in sound Input level not properly
adjusted
Speaker damage
ENS control
Poor bass response Speakers out of phase
Ticking noise Radiated noise from spark
plug wires
Poor car power supply
Whining noise Alternator noise caused by
poor grounding of
amplifier, source, other
component, battery, or
alternator
Amplifier shuts off at Speaker impedance too
medium/high low
volumes
No sound in one Speaker wiring problem
channel
Audio wiring problem
Solution
Check the remote turn on connection and the
voltage at the amplifier and source unit
Check all system fuses
Recheck all connections
Check for short circuits
Check speakers with another amplifier
Double check all filter controls; possibly some filter
overlaps in frequency; if so, please correct the
alignment.
Double check function of speakers and wiring of
speakers and correct.
Check for adequate ventilation
Check load impedance
Check speaker wiring for short to the vehicle
chassis
Reduce input sensitivity (turn 'LEVEL' CCW)
Check supply voltage at power terminal (+12V).
Readjust amplifier input level (turn „LEVEL" CCW)
Check speakers with another amplifier
Set ENS to reduce distortions to min.
Recheck speaker wiring
Subwoofer: check wiring; check adjustment of
phase shift control and correct.
Reroute amplifier input wiring
Readjust the ENS settings
Install a noise filter
Check all ground connections
Install a noise filter on the source unit's power
cable
Install a coupling transformer in the signal path to
improve ground isolation for the signal path
(ground loop isolator)
Readjust the ENS settings
Be sure to respect the impedance
recommendations. If you use an Ohm-meter to
check the speaker impedance, please remember
that DC resistance and AC impedance may not be
the same.
Inspect for short circuit or an open connection
Invert the left and right RCA inputs to determine if
the problem occurs before coming into the amp.
Check the volume level of the source unit. Clean
the contacts on the fuse holders.
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