Troubleshooting - Yamaha A-U671 Mode D'emploi

TROUBLESHOOTING

Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below or if the instructions below do not help, turn off this unit,
disconnect the power cable, and then contact the nearest authorized Yamaha dealer or service center.
Problem
This unit fails to turn on.
This unit turns off suddenly and the power
indicator turns off.
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TROUBLESHOOTING
Cause
The power cable is not connected or the plug is not completely
inserted.
The protection circuitry has been activated because of a short
circuit, etc.
There is a problem with the internal circuitries of this unit.
A speaker with a low impedance is connected.
The speaker wires are touching each other or shorting out against
the rear panel.
The speaker is malfunctioning.
The protection circuitry has been activated because of excessive
input or excessive volume level.
The protection circuitry has been activated due to excessive internal
temperature.
This unit has been exposed to a strong external electric shock (such
as lightning or strong static electricity).
There is a problem with the internal circuitries of this unit.
Solution
Connect the power cable firmly.
Check that the speaker wires are not touching each other and then turn the
power of this unit back on.
Disconnect the power cable and contact the nearest authorized Yamaha
dealer or service center.
Use speaker(s) with proper speaker impedance (6 Ω or higher).
Connect the speaker cables properly and turn the power on again. Confirm
normal sound output from speakers after the unit is turned on.
Replace the speaker set and turn the power on again. Confirm normal
sound output from speakers after the unit is turned on.
Rotate the VOLUME control on the front panel to decrease the volume
level and then turn the power on again.
Allow about 30 minutes for the temperature inside this unit to decrease,
rotate the VOLUME control on the front panel to lower the volume and
then turn the power on again. Set the unit in a place where heat can readily
dissipate from the unit.
Turn off this unit, disconnect the power cable, plug it back in after 30
seconds, then use the unit normally.
Disconnect the power cable and contact the nearest authorized Yamaha
dealer or service center.
See page
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