Alpine 3672 - Troubleshooting Common Issues; Remote-On Light Issues; No Sound or Partial Sound; Alternator Whine

| 3672
In care of ppp
-Remote-on
light.
does.
not
come
on.
e.Head
unit
is
not
on:
turn
the
head
unit
on.
e Ground wire is disconnected or.defective: Check for continuity. with an
ohmmeter between 3672’s Ground terminal and a known chassis ground:
point.
e Battery wire is disconnected or defective: Check for aprons +12
volts between 3672’s Battery and Ground terminals.
e Blown Fuse: Check 3672’s 3A Fuse, located near the Battery terminal.
If it is blown, replace it.with.an.identical. one....lf. the new. fuse. blows
immediately, then check all the wiring connections. if no fault is found,
consult your Alpine dealer. x!
e Remote-On wire between the head unit a the 3672 is disconnected or
defective: Check for +12 volts between 3672’s Remote-on connector and
ground connector with the head unit on.
Remote-On
lightis
on,
but
no
soundis
heard
from
|
e
Incorrect
Switch
Settings:
Make
sure
that
all
Mode
Selector
switches
are
some
or
all
of
the
speakers.
in
their
correct
positions
for
your
system
configuration
(See
Wiring
and
Set-up).
e Defective or disconnected. aucic cables: check for continuity and replace
if necessary. :
e Incorrect Output Level Adjushinent Verify that the 3672's output level
controls are not turned completely counterclockwise. If they are, sound
output level may be very low and may give thei impression that the system
(or part of the system) is dead.
e Defective 3672: Bypass the 3672 by connecting its input and the dead
output terminal's cables together (with a pair of Alpine 4401 female-to-fe-
male adapters). If the system becomes functional, the 3672 may be
defective. Consult your Alpine dealer.
e Defective Head Unit, or other audio component: Check each Semeonan
for wiring-and operation.
Alternator
whine
through
the
audio
system
with
|
e
Ground
loops:
Connect
grounds
of
all
audio
components
to
the
same
the
engine
running.
point
on
the
vehicle
chassis.
Verify
that
this
point
is
a
true
ground
by
,
checking
for
continuity
with
an
ohmmeter
between
the
ground
point
and
the battery’s (—) terminal, and follow the grounding recommendations on
page 11.
@ Shorted Signal and Chassis Grounds: Check for shorts between speaker
leads and chassis ground, or input signal ground and chassis ground.
e The other audio componenis may have insufficient filtering: They may
need noise suppressor on their battery or ignition connections.
e Check the vehicle’s battery and voltage regulator.