SONY XM-404EQX user manual download (Page 14 of 16)

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Page 14 of 16
Troubleshooting Guide
The
following
checklist
will
assist
in the
correction
of
most
problems
which
you
may
encounter
with
your
unit.
Before
going
through
the
checklist
below,
refer
to the
connection
and
operating
procedures.
Problem
CauselSolution
The POWER/PROTECTOR
The fuse is blown.
--_ Replace
the fuse with
a
new
one.
indicator does not light up.
The
ground
lead
is not
securely connected.
--_ Fastenthe ground
lead securely
to a
metal surface
of the
car.
The voltage
going
into
the remote
terminal
is too low.
The connected
master
unit is not turned
on. --*
Turn
on the master
unit.
• The system
employs
too many
amplifiers.
---*Use a relay.
Check
the battery
voltage
(10.5
16 V).
The
OVER
CURRENT
indicator
lights
Turn
off
the power
switch.
The speaker
outputs
are short-circuited.
_
Rectify
up in red.
the
cause
of
the
short-circuit.
The OFFSET indicator
lights
up in red.
Turn
off
the
power
switch.
Make
sure
the speaker
cord
and
ground
lead are
securely
connected.
The
THERMAL
indicator
lights up in
The
unit heatsup
abnormally.
red.
*
Use speakers
with
suitable
impedance.
Make
sure
to place
the
unit
in a well
ventilated
location.
Alternator
noise
is heard.
The
power
connecting
leads
are
installed
too
close
to
the RCA
pin
cords.
--_
Keep the leads
away
from
the
cords.
The
ground
lead
is not securely
connected.
----*Fasten
the
ground
lead
securely
to a metal
surface
of the car.
Negative
speaker
leads
are touching
the
car chassis.
_
Keep
the
leads
away
from
the
car chassis.
The sound is muffled.
The
sound
is too low.
HPF, LPF, and EQUALIZER does not
work.
NO sound is heard.
The FILTER selector
switch
is set to the
"LPF"
position.
The LEVEL adjustment
control
is set
to the "MIN"
position.
The DIRECT
switch
is set to ON.
One or more
of
the
switches
is settled
between
settings
(i.e., not correctly
set);
set the
switch
propedy.
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