Yamaha PSR-4000 - Manual (Page 127)

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Troubleshooting
This is a normal result of the power surge that occurs when the unit is
turned on or off. No solution necessary.
The volume controls or foot volume are turned all the way down.
Set the volume controls and foot volume to a reasonable listening
level.
Are the desired parts turned on?
A pair of headphones is plugged into the PHONES jack. Unplug the head-
phones.
Is the FOOT SWITCH connected to the FOOT VOLUME connector?
The FADE OUT switch is on and has reached the end of its duration,
muting the sound. Press the FADE IN/OUT switch so that its indicator
goes out.
MIDI local control is turned OFF. Turn MIDI local control ON using F8
MIDI function.
The [LIST HOLD] button is engaged (its LED is lit). Press the [LIST
HOLD] button so that its indicator goes out, then try selecting a style or
voice (page 11).
The [LIST HOLD] button is engaged (its LED is lit). Press the [LIST
HOLD] button so that its indicator goes out.
The panel SUSTAIN button does not function when SUSTAIN is assigned
to the connected FOOT SWITCH. Disconnect the FOOT SWITCH or use
the FOOT SWITCH to control sustain.
The MIDI CLOCK setting is set to EXTERNAL. Reset the MIDI CLOCK to
INTERNAL using F8 MIDI function.
The maximum polyphony has been exceeded. You can play up to 32
notes at the same time—including auto-accompaniment, song memory,
multi pad notes etc.. Notes exceeding this limit will not sound. When using
ABC or HARMONY, be careful not to exceed the limit.
This is normal, each voice or style has its own suitable preset values.
This is normal and is a result of the PSR-4000’s sampling system.
Some voice’s have a pitch limit which has been reached. This is normal.
Are you sure you’re playing on the left-hand section of the keyboard?
You are using single-finger type fingering in the fingered mode, or vice-
versa. Use the correct type of chord fingering for the selected ABC mode.
Is the ABC MODE set to MANUAL MIDI BASS?
The value is an approximate value.
It will depend on the selected voice.
Turn the power off and remove the AC cord from wall and then try to
change the backup batteries or take out the backup batteries and replace
them after approximately 1 minute.
Noise is heard when the power is
turned on or off.
No sound.
Symptom Possible Cause/Solution
The style list or voice list does not ap-
pear even when a style or voice group
button is pressed.
The style list, voice list or one touch
setting list does not automatically
disappear.
Pressing the SUSTAIN button on the
panel will not switch on the SUSTAIN
function.
The accompaniment does not start.
Some notes do not sound or are prema-
turely cut off.
When a voice or style is changed, the
previously selected effect is changed or
the sound is prematurely cut off.
There is a slight difference in sound
quality between notes played on the
keyboard.
Some voice’s have a looping sound.
Some voice’s will jump an octave in pitch
when playing up or down scales in the
upper or lower registers.
Some noise or vibrato is noticeable in
higher pitches depending upon the voice.
The ABC chord does not change even
when a different chord is played or the
chord is not recognized.
The disk’s remaining memory value does
not coincide with the actual value.
When using a MIDI controller, effects do
not function as usual or not at all.
If any trouble other than what is listed
above occurs try the solution at the right.