Troubleshooting - Yamaha NX-B55 Owner's Manual

Refer to the table below if the unit does not operate properly. If the problem you are experiencing is not listed below, or if the instruction does not help, turn
off the unit, disconnect the power cable, and contact the nearest authorized Yamaha dealer or service center.
■ General
Symptoms
This unit is not turned on. The AC adaptor is disconnected from the wall outlet or
12V
The p (power) is not turned on.
No sound is output from This unit and the other device are not connected correctly.
either of the speakers, or
the sound is too quiet.
Connections are faulty (or the connections are incomplete). Check that the connections are made correctly. Or connect
This unit's volume is set to too low.
The sound from the connected device is too quiet.
Headphones are connected. (No sound comes from the
speakers when headphones are connected.)
The AUTO STANDBY switch at the rear is set to INIT..
The sound is distorted. The sound is too loud.
Noise is heard. Connections are faulty (or the connections are incomplete). Check that the connections are made correctly.
The output connector has a bad connection.
External noise is picked up.
Power-supply noise is picked up.

Troubleshooting

Causes
(DC 12V).
Remedies
Connect the AC adaptor to the wall outlet or 12V
(DC 12V) correctly.
Turn on the p (power). (The indicator lights up.)
Make sure that this unit and the other device are connected
correctly.
this unit to the Bluetooth device, again.
Turn the VOL (volume) control to the right to increase the
volume.
Increase the volume of the connected device.
Disconnect the headphones from this unit.
Set the AUTO STANDBY switch at the rear to ON or OFF,
again (ON in default setting. ☞ page 3).
Lower the volume of the connected device.
Check that the stereo mini jack and stereo mini plug cable
are not dirty. If they are dirty, clean them.
Make sure that devices which emit electromagnetic waves,
such as mobile phones, wireless appliances, microwaves or
inverter lighting equipment, are not near this unit.
Change the source of power supply by directly connecting
the AC adaptor to the wall outlet, etc.
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