Troubleshooting - Yamaha Tyros4 Owner's Manual

Overall
A click or pop is heard when the power is
turned on or off.
Noise is heard from the instrument.
In the LCD display, there are some black
points (unlit) or white points (always lit).
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 Style/
Song playback volume.
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.
The Premium Pack data cannot be purchased.
110
Tyros4 Owner's Manual

Troubleshooting

This is normal. Electrical current is being applied to the instrument.
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.
These are the result of defective pixels and occasionally occur in TFT-LCDs; they do
not indicate a problem in operation.
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] control.
All keyboard parts are set to off. Use the PART ON/OFF [RIGHT 1]/[RIGHT 2]/[RIGHT
3]/[LEFT] button to turn it on (page 35).
The volume of 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 in the CHANNEL display (pages 52, 62).
Headphones are connected, disabling the speaker output. Unplug the headphones.
If volume control is assigned to the [ASSIGN] slider or foot controller, set it to an appro-
priate level.
The [FADE IN/OUT] button is on, muting the sound. Press the [FADE IN/OUT] button to
turn the function off.
A plug is inserted in the LOOP SEND jacks. Unplug the LOOP SEND jacks.
Connect the footswitch to the appropriate jack.
Check whether the external speaker is connected and the volume control is adjusted
properly (pages 96, 106).
The volume may be turned up too high. Make sure all relevant volume settings are
appropriate.
This may be caused by certain effects or filter resonance settings. Check the effect or
filter settings and change them accordingly, referring to the Reference Manual on the
website.
You are probably exceeding the maximum polyphony of the instrument. The instrument
can play up to 128 notes at the same time including RIGHT 1/RIGHT 2/RIGHT 3/LEFT
Voices, Style, Song, and Multi Pad notes. When the maximum polyphony is exceeded,
the least important notes (such as soft notes and notes currently decaying) will stop
sounding first.
The volume of the keyboard parts may be set too low. Raise the volume in the BAL-
ANCE display (page 53).
The [ASSIGN] slider may be set to a low level. (By default, keyboard volume is
assigned to the [ASSIGN] slider.) Set it to an appropriate level.
This may occur if a USB storage device has been installed to the instrument. Installa-
tion of some USB storage devices may result a long interval between turning the power
on and appearance of the Main display. To avoid this, turn the power on after discon-
necting the device.
The language settings have been changed. Set the appropriate language for the file/
folder name (page 17).
• 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 handled by the instru-
ment. Rename the file, reducing the number of characters to 50 or less.
Before purchasing the Premium Pack data, obtain the license key (page 38).