Marantz SR490 - Page 15

TROUBLESHOOTING
GUIDE
If
your
receiver
/
amplifier
should
not
perform
as
expected,
consult
the
table
below
to
see
if
the
problem
can
be
corrected
before
seeking
help
from
your
dealer
or our service organization.
[ PROBLEM
aa
POSSIBLE CAUSE
REMEDY
No power
S
* The AC input cord is disconnected.
Poor connection at AC wail outlet or the outlet
is inactive.
¢ Connect cord securely.
e Check the outlet using lamp or other appliance.
The sound is shut off.
¢ The speaker cables are shorted.
¢ Check the speaker connections.
| No sound from the speakers.
The speaker cables are disconnected.
The master volume is adjusted too low.
The surround volume is adgusted too low.
* The center volume is adgusted too low.
The Mute button is pressed to ON.
¢ The SPEAKER switches are not pressed correctly.
© incorrect selection of program source.
¢ Format of surround is different.
¢ Incorrect connections between the components.
e Check the speaker connections.
e Adjust the master volume and center, sunr.vol.
¢ Press the MUTE button to cancel the muting
effect.
¢ Press the SPEAKER switches to ON correctly.
e Select the desired program source correctly.
© DISK of AC-3 format is used.
e Make connections correctly.
Sound is only heard from one of
front speakers.
e The BALANCE control is set to one end.
¢ One of the connection cords is disconnected.
e Adjust the BALANCE control.
* Connect the right and left connection cords
&
No sound from the rear speakers.
The remote control unit does not
operate.
¢ The sound field mode is not selected correctly
or is set to off.
¢ The master volume and rear level are adjusted
too low. :
¢ Monaural source is used, or source without
surround
information.
surround
source.
No
sound
from
the
center
speaker.
*
The
DOLBY
DIGITAL
(AC-3),
DOLBY
PRO
LOGIC,
e
Select
the
desired
mode.
DOLBY PRO LOGIC THEATER or DOLBY 3
STEREO mode is notselected.
¢ The center mode is set to the PHANTOM mode.
¢ The master volume and center level are adjusted
too low.
¢ Batteries are not loaded or exhausted.
¢ The remote sensor is obstructed.
securely.
e Select the desired sound field mode correctly.
¢ Adjust the master volume and rear level.
¢ Change the playback source to the stereo or
¢ Set to the NORMAL or WIDE mode.
e Adjust the master volume and center level.
e
Replace the with new batteries.
Remove the obstacle from the remote sensor.
Not receiving the stations.
(RECEIVER ONLY)
¢ No antenna is connected.
¢ The desired station frequency is not tuned in.
¢ Connect an antenna.
Tune in the desired station frequency.
Not receiving the preset stations.
(RECEIVER ONLY)
e An incorrect station frequency has been
memorized.
¢ The memorized stations are cleared.
¢ Memorized the correct station frequency.
¢ Memorize the stations again.
Poor FM reception.
(RECEIVER ONLY)
¢ No antenna is connected.
e The antenna is not positioned for the best
reception.
e Connect an antenna.
¢ Change the position of the antenna.
Route as high as possible.
Continuous hissing noise during FM
reception, especially when a stereo
broadcast is received.
(RECEIVER ONLY)
© Weak signal.
Continuous or intermittent hissing
noise during AM reception, especially
at night.
A humcan be heard during AM
reception.
(RECEIVER ONLY)
e Noise is caused by motors, fluorescent
lamps or lightning, etc.
¢ The AC input cord may be too close to the AM
loop antenna or the antenna wire.
14
se SS et ee ee Oe
¢ Change the position of the antenna.
* In areas remote from the transmitter, a 5 to
8 element antenna designed exclusively for
FM is suggested.
¢ Keep the receiver away from noise sources.
e Install an outdoor AM antenna.
¢ Position the AC input cord away from the
antenna wire and the AM loop antenna.
* Adjust the position of the AM loop antenna.