Troubleshooting - Yamaha PSR-S950 Owner's Manual

Troubleshooting

Overall
A click or pop is heard when the power is turned on or off.
Noise is heard from the instrument's speakers.
There is a slight difference in sound quality among different notes
played on the keyboard.
Some Voices have a looping sound.
Some noise or vibrato is noticeable at higher pitches, depending
upon the Voice.
The overall volume is too low or no sound is heard.
The sound is distorted or noisy.
Not all simultaneously played notes sound.
The keyboard volume is lower than the Song/Style playback vol-
ume.
The Main display does not appear even when turning the power
on.
Some characters of the file/folder name are garbled.
An existing file is not shown.
When the power is turned on, the message "The USB storage
devices cannot be authenticated" appears.
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PSR-S950/S750 Owner's Manual
Electrical current is being applied to the instrument. This is normal.
Noise may be heard if a mobile phone is used near the instrument
or if the phone is ringing. Turn off the mobile phone, or use it further
away from the instrument.
This is normal and is a result of the instrument's sampling system.
The master volume may be set too low. Set it to an appropriate
level with the [MASTER VOLUME] dial.
All keyboard parts are set to off. Use the PART ON/OFF [RIGHT 1]/
[RIGHT 2]/[LEFT] button to turn it on.
The volume of the individual parts may be set too low. Raise the
volume in the BALANCE display (page 53).
Make sure the desired channel is set to ON (pages 52, 57).
Headphones are connected, disabling the speaker output. Unplug
the headphones.
The [FADE IN/OUT] button is on, muting the sound. Press the
[FADE IN/OUT] button to turn the function off.
The volume may be turned up too high. Make sure all relevant vol-
ume settings are appropriate.
This may be caused by certain effects or filter settings. Check the
effect or filter settings and change them accordingly, referring to
the Reference Manual.
You are probably exceeding the maximum polyphony (page 99) of
the instrument. When the maximum polyphony is exceeded, the
earliest played notes will stop sounding, letting the latest played
notes sound.
The volume of the keyboard parts may be set too low. Raise the
volume in the BALANCE display (page 53).
This may occur if a USB flash memory has been installed to the
instrument. Installation of some USB flash memories may result a
long interval between turning the power on and appearance of the
Main display. To avoid this, turn the power on after disconnecting
the device.
The language settings have been changed. Set the appropriate
language for the file/folder name (page 16).
The file extension (.MID, etc.) may have been changed or deleted.
Manually rename the file, adding the appropriate extension, on a
computer.
Data files with names of more than 50 characters cannot be han-
dled by the instrument. Rename the file, reducing the number of
characters to 50 or less.
If a protected Expansion Pack is installed to the instrument, in
order to use the Voices or Styles contained in the Expansion Pack
you need to connect the USB flash memory which was used for
installing. Connect the proper USB flash memory to the instrument
and turn the power to the instrument on again.