TROUBLESHOOTING

Before
removing
your
amplifier,
refer
to
the
list
below
and
follow
the
suggested
procedures.
Always
test
the
speakers
and
their
wires
first.
AMPLIFIER
WILL
NOT
POWER
UP.
Check
for
good
ground
connection.
Check
that
remote
DC
terminal has
at
least 13.Bv
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
amplifierlsJ.jf
hiss/noise
disappear>.
then plug in the component driving the amplifier and unplug
its
inputs. If
hiss
/ noise
disappear>.
go
on
until the faulty/noisy component
is
found.
It
is
best
to
set
the
amplifier's
input
level
as
insensitive
as
possible. The best
SUbjective

SIN

ratio
is
oblainable this
way.
Try to drive
as
high a
signal
level
from the head
unit
as
possible.
PROTECTION
LED COMES
ON
WHEN
tT
HE
AMPLIFIER
IS
POWERED
UP.
Check
for
shorts
on
speaker leads.
Check
that
the
volume control
on
the
heiJd
unit
is
turned
down
low.
Remove speaker leads.
and
reset
the
am/Jlifier.
If
the
P
otection
LED still
comes
on.
then
the
amplifier
is
faulty.
Check
that
the
minimum
speaker imped<lnce
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
contrails)
is
set
to
match
the
signal Ie
Check
that
all crossover frequencies have been properly
set.

-.