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Troubleshooting guide
If a problem occurs while you are using the remote controller, first
try to operate the controls on the front panel of the TX-DS494 to
make sure that it is not due to a malfunction (or worn out batteries)
in the remote controller.
POWER
No power.
Power cord is disconnected.
Connect power cord (page 20).
There is external noise in the computer circuits of this unit.
Remove the AC plug from the outlet and then plug it again
(page 20).
AC fuse blown.
Contact your Onkyo Service Center.
Power on but no sound.
MUTING indicator flashes.
Press the MUTING button on the remote controller to turn
it off (page 23).
Bad connections.
Check connections, speaker leads, etc (pages 10-17).
Amplifier protection circuitry has been activated.
(PROTECT will be displayed.)
Contact your Onkyo Service Center.
Input selector is not set properly.
Set to correct input source (page 22).
Headphones are connected.
Lower volume and then disconnect headphones (page 8).
SPEAKERS
No sound from the center speaker, or very minimal
sound.
Speaker cable is not corrected.
Check the connection between the TX-DS494 and the
speaker (page 17).
Listening mode is set to STEREO or ORCHESTRA.
If listening mode is set to STEREO or ORCHESTRA, the
center speaker outputs only the effect sound (pages 26-28).
Speaker configuration is set to 2 ch or 4 ch.
Set the speaker configuration to the 3 ch or 5 ch (page 21).
No sound or very low volume from subwoofer.
Subwoofer mode is set to OFF.
Check the subwoofer mode setting (page 21).
Subwoofer mode setting is improper.
Check the subwoofer mode setting (page 21).
Hum, low-frequency noise.
Poor or no input ground.
Check outer conductor of input plugs (pages 10-15).
Poor or no phono motor ground.
Check for proper ground connection (page 13).
The placement of the audio connection cables on the rear panel
is incorrect.
Adjust the placement of the cable to reduce hum.
Howling when the volume is turned up.
Turntable and speakers are too close together.
Move them farther apart.
Rough or scratchy sound. High range is not clear.
Stylus of turntable pick-up is worn.
Replace.
Turntable stylus tip is dirty.
Clean.
Treble control too high.
Turn treble control down (page 8).
VIDEO and AUDIO
Desired picture does not appear.
Improper connection.
Check the connection again. Insert the plugs and
connectors completely (pages 10-15).
Picture and sound do not match.
Improper connection.
Check connections (pages 10-15).
No picture appears on the TV screen (or monitor).
TV (or monitor) is not set to receive the output signals from the
receiver.
Set the TV (or monitor) to the receiver input.
Video cable is not connected securely.
Check connections (pages 10-15).
34


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