Troubleshooting - Yamaha NU1 Owner's Manual

Problem
The instrument does not turn
on.
Noise is heard from the
speakers or headphones.
A click or pop is heard when
the power is turned on or off.
The overall volume is low, or
no sound is heard.
The pitch and/or tone of the
Piano Voices in certain
ranges do not sound right.
Sound is not heard on a par-
ticular key.
Sound input to the AUX IN
jacks is interrupted.
The USB flash memory has
hung up (stopped).
Mechanical noise is heard
during performance.
When playing the same key
repeatedly and quickly or
playing a trill continuously for
a long time, a sound louder
than expected (considering
your playing strength) might
very occasionally occur.
* The message list (page 30) is also provided for your reference.

Troubleshooting

Possible Cause and Solution
The instrument has not been plugged in properly. Securely insert the female plug into
the socket on the instrument, and the male plug into a proper AC outlet (page 9).
The noise may be due to interference caused by the use of a mobile phone in close
proximity to the instrument. Turn off the mobile phone, or use it further away from the
instrument.
Electrical current is being applied to the instrument. This is normal.
• The Volume is set too low: set it to an appropriate level using the [MASTER VOL-
UME] control (page 10).
• Make sure a pair of headphones is not connected to the headphones jack (page 12).
• Make sure that Local Control (page 29) is on.
The Piano Voices attempt to precisely simulate actual piano sounds. However, as a
result of sampling algorithms, overtones in some ranges may sound exaggerated, pro-
ducing a somewhat different pitch or tone. This is normal, and no cause for concern.
Keyboard may not function normally if the key was pressed when the power was
turned on. Turn off the power and turn it again to reset the function. Do not touch any
keys when turning the power on (page 10).
The output volume of the external device connected to this instrument is too low, result-
ing in the sound being cut off via the Noise Gate after it is input to this instrument.
• Increase the output volume of the external device. The volume level reproduced via
this instrument's speakers can be adjusted by using the [MASTER VOLUME] control.
• Set the Noise Gate to off (page 28).
• Disconnect the USB flash memory and connect it to the instrument again.
• The USB flash memory is not compatible with the instrument. Only use the USB
flash memory whose compatibility has been confirmed by Yamaha (page 23).
The keyboard mechanism of this instrument simulates the keyboard mechanism of an
actual piano. Mechanical noise is also heard on a piano.
This might be caused by the mechanical structure of the keys and the action; this is
normal, but only very seldom occurs.
NU1 31
Owner's Manual