ONKYO TX-DS787 Manual Do Utilizador
70
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-DS787 to
make sure that it is not due to a malfunction (or worn out batteries)
in the remote controller.
try to operate the controls on the front panel of the TX-DS787 to
make sure that it is not due to a malfunction (or worn out batteries)
in the remote controller.
POWER
Power shuts off immediately after power on.
• Amplifier protection circuitry has been activated.
➞ Remove the power cord from outlet immediately. Contact
your Onkyo service center.
No power.
• Power cord is disconnected.
➞ Connect power cord.
• External noise in the affecting the internal microcomputer.
➞ Turn the power button off and then on again or remove the
power cord from the outlet and then plug it in again.
• Internal fuse is blown.
➞ Contact your Onkyo Service Center.
Power turns on but no sound.
• “Muting” is displayed.
➞ Press the MUTING button on the remote controller to turn
it off.
• Bad connections or wiring.
➞ Check connections, speaker cables, etc.
• Amplifier protection circuitry has been activated.
➞ Contact your Onkyo Service Center.
The sound of the playback source is not heard.
• Input selector is not set properly.
➞ Set to correct input source.
• Headphones are connected.
➞ Lower volume and then disconnect headphones.
SPEAKERS
No sound from the center speaker, or at very low
volume.
volume.
• Speaker cable is not connected.
➞ Check the connection between the amplifier and the
speaker.
• Listening mode is set to Stereo or Direct.
➞ Set the Listening mode to any mode other than Stereo or
Direct. The output to the center speaker may differ
depending on the listening mode.
depending on the listening mode.
• CENTER level is set to minimum.
➞ Set the CENTER level to the appropriate volume (page
32).
• CENTER SPEAKER is set to “None.”
➞ Set CENTER SPEAKER to “Large” or “Small” (page 30).
No sound or very low volume from subwoofer.
• Subwoofer is set to “No.”
➞ Check the speaker setting (page 30).
• Subwoofer speakers output level setting is improper.
➞ Check the output level of the Subwoofer using the test
tone.
Low frequency humming is heard.
• Not properly grounded.
➞ Check outer conductor of input plugs.
• Turntable motor is not properly grounded.
➞ Check for proper ground connection.
• Audio connection cables on the rear panel are connected
incorrectly.
➞ Adjust the placement of the cable to reduce hum.
➞ Adjust the placement of the cable to reduce hum.
Howling is heard when the volume is turned up.
• Turntable and speakers are located too close together.
➞ Move them farther apart.
Rough or scratchy sound is heard. High range is
not clear.
not clear.
• The needles of turntable is dirty or worn, or a problem exists
with a connected component.
➞ Refer to the instruction of the connected components and
➞ Refer to the instruction of the connected components and
check for problem.
• Treble control too high.
➞ Turn treble down.
No sound is output from the surround back
speakers.
speakers.
• The setting for the surround back speakers does not match the
actual configuration.
➞ Check the Surr Back Out setting (OSD MenuSpeaker
➞ Check the Surr Back Out setting (OSD MenuSpeaker
Setup
→ Speaker Config). If one surround back speaker is
connected, select “1 ch,” and if two surround back
speakers are connected, select “2 ch” (page 30).
speakers are connected, select “2 ch” (page 30).