Lanzar OPTI 250x2 Owner's Manual page 15

AMPLIFIER WILL NOT POWER UP.
• Check for good ground connection.
• Check that remote DC terminal has at least 3v DC.
• Check that there is battery power on the
+ terminal.
• Check
all
fuses.
• Check that Protection LED is not lit. If it is lit, shut off amplifier briefly and then repower it.
HIGH HISS OR ENGINE NOISE (ALTERNATOR WHINE) IN SPEAKERS.
• Disconnect
all
RCA inputs
to
the amplifier(s) - ifhiss/noise disappears, then plug in the component
driving the amplifier and unplug its inputs. Ifhiss/noise disappears, go on until the faulty/noisy
component is found.
• It is
best
to set the amplifier's input level as low as possible. The best subjective SIN ratio
is obtainable this way. Try to drive as high a signal level from the head unit as possible.
PROTECTION LED COMES ON WHEN THE AMPLIFIER IS POWERED UP.
• Check for shorts on speaker leads.
• Check that the volume control on the head unit is turned down low.
• Remove speaker leads, and reset the amplifier. If the Protection LED still comes
on, then the amplifier is faulty.
AMPLIFIER(S) GETS VERY HOT.
• Check that the minimum speaker impedance for that model is correct.
• Check for speaker shorts.
• Check that there is good airflow around the amplifier. In some
applications, an external cooling
fan
may be required.
DISTORTED SOUND
• Check that the
Level
control(s) is set to match the signal level of the
head unit.
• Check that
all
crossover frequencies have been properly
set.
• Check for shorts on the speaker leads.
HIGH SQUEAL NOISE FROM SPEAKERS.
• This is almost always caused by a poorly-grounded RCA patch cord.
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