Troubleshooting Guide - Onkyo TX-DS484 Instruction Manual

Troubleshooting guide

If a problem occurs while you are using the remote controller, first try to operate the front panel controls on the main unit to make sure that it
is not due to a malfunction (or worn out batteries) in the remote controller.
Trouble
No power.
Power on but no sound.
No sound from the center
speaker, or very minimal
sound.
Hum, low-frequency noise.
Howling when the volume is
turned up.
Rough or scratchy sound.
High range is not clear.
AM stations cannot be
received.
Buzzing noise on AM (particu-
larly conspicuous at night or
with weak stations).
High-pitched noise or buzzing
noise on AM.
Crackling noise on AM, FM.
TUNED and STEREO indica-
tors light but sound is distorted
and stereo separation is bad.
TUNED and STEREO indica-
tors flicker and hiss is heard
on FM.
No station is recalled.
Front panel controls function
but remote controller does not.
The sound of the playback
source is not heard.
Also refer to the respective instruction manuals of the video disc player, video cassette recorder, TV monitor, etc., that compose your enter-
tainment system.
Cause
Power cord is disconnected.
There is external noise in the computer cir-
cuits of this unit.
AC fuse blown.
MUTING indicator is lit.
Bad connections.
Amplifier protection circuitry has been acti-
vated. ('PROTECT' will be displayed.)
Speaker cable is not corrected.
Surround mode is set to
Unplugged, 5ch Stereo.
CENTER level is set to minimum.
CENTER SPEAKER is set to NONE.
Poor or no input ground.
Poor or no phono motor ground.
The placement of the audio connection cables
on the rear panel is incorrect.
Turntable and speakers are too close
together.
Stylus of turntable pick-up is worn.
Turntable stylus tip is dirty.
Treble control too high.
AM loop antenna is not attached.
Noise from electrical apparatus such as fluo-
rescent lamp.
Noise from TV set.
Noise caused by turning fluorescent lamp on
and off.
Noise from automobile ignition.
Station is too strong.
Multiple reflection of the radio waves because
of tall buildings or mountains.
Station is too weak.
Stereo FM broadcasts cover only about half
the distance of an ordinary broadcast.
The power cord has been unplugged or the
POWER switch has been turned off for a long
time.
No batteries in remote controller.
Batteries have worn out.
The input selector is not set properly.
Connect power cord.
Turn the power button off and then on again
or remove the AC plug from the outlet and
then plug it again.
Contact your Onkyo Service Center.
Press the MUTING button on the remote con-
troller to turn it off.
Check connections, speaker leads, etc.
Contact your Onkyo Service Center.
Check the connection between the amplifier
and the speaker.
Orchestra, If Surround mode is set to Orchestra,
Unplugged, or 5ch Stereo, the center speaker
outputs only the effect sound.
Set the CENTER level to the appropriate vol-
ume.
Set CENTER SPEAKER to LARGE or
SMALL.
Check outer conductor of input plugs.
Check for proper ground connection.
Adjust the placement of the cable to reduce
hum.
Move them farther apart.
Replace.
Clean.
Turn treble control down.
Connect the included AM loop antenna to the
AM antenna terminals.
Move the AM loop antenna to different posi-
tion.
Set up an outdoor AM antenna.
Place the AM loop antenna as far as possible
from the TV.
Move unit away from TV set.
Move antenna as far as possible from the flu-
orescent lamp.
Install an FM outdoor antenna as far as possi-
ble from the road.
Change the position or direction of the out-
door antenna.
Change to FM indoor antenna.
Use antenna which has better directivity and
select a point where the distortion is least.
Install an outdoor FM antenna.
Change the position or direction of the out-
door antenna.
The memory contents are lost. Store all sta-
tions again.
Insert batteries.
Replace batteries.
Set it to the playback source.
Remedy
See
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