Troubleshooting - Yamaha PortaTone PSR-450 Owner's Manual

Troubleshooting

Symptom
A "pop" sound occurs when the
[STANDBY/ON] switch is pressed to
turn the instrument on.
• The volume has become lower.
• The sound quality has become worse.
• The rhythm stops.
• Recorded song data is not played
back properly.
• The display disappears suddenly and
the panel settings are reset.
Noise is heard from the PSR-450.
No sound from the PSR-450 speakers
when the keyboard is played.
• Some notes don't sound when a
number of keys are played
simultaneously.
• Auto-accompaniment or song
playback is interrupted.
Rhythm accompaniment does not play
when the [START/STOP] button is
pressed.
Auto-accompaniment will not start.
Auto-accompaniment does not play
properly.
Footswitch operation is reversed.
The timbre and volume of the sound
produced varies according to the keys
played.
Cause
The initial surge of power in the
instrument.
The batteries are drained.
This can happen if a mobile telephone
(or other wireless equipment) is being
used or is ringing near the instrument.
A pair of headphones or a connecting
cable may be plugged into the
instrument's PHONES/OUTPUT jack.
The Dictionary function may be ON.
The MIDI LOCAL mode may be set to
OFF.
This can occur if the PSR-450's
maximum polyphony (the maximum
number of playback notes) is
exceeded.
A style number between 128 and 140
(Pianist category) or number 121
(Guitar Serenade) is selected.
The MIDI CLOCK may be set to
EXTERNAL and the instrument is not
receiving an external clock signal.
The style volume may be turned all the
way down.
The keyboard split point is not set
appropriately for the chords you are
playing.
The instrument's power was turned on
while the footswitch was pressed.
In order to reproduce realistic
instrument sound and response, the
PSR-450's AWM tone generator
system employs "multi-sampling" in
which different instrument samples are
assigned to different key ranges. This
can result in slight differences in the
sound.
Solution
This is normal and is not a cause for
concern.
Replace the batteries with a complete
set of 6 new batteries, or plug in the
power adaptor.
Turn mobile phones near the
instrument off. Using a mobile phone
near the PSR-450, including receiving
calls, can produce unwanted noise.
Unplug the headphones or connecting
cable.
Turn the Dictionary function OFF.
Turn the MIDI LOCAL mode ON.
The maximum polyphony of the PSR-
450 is 32 notes. Make sure that the
maximum number of notes being
played — including auto-
accompaniment or song playback — is
32 or less.
This is not a malfunction. The Pianist
and Guitar Serenade styles do not
include rhythm parts.
Refer to the clock setting instructions
on page 66, and set the clock to
INTERNAL.
Refer to the instructions on page 23
and set the style volume to an
appropriate level.
Refer to the instructions on page 28
and set the split point at an appropriate
key.
Turn the power off, and then turn it on
again without pressing the footswitch.
This is not a malfunction.
PSR-450 Owner's Manual
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