Yamaha PSR-79 Owner's Manual - Page 42

Troubleshooting - electric keyboard

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Troubleshooting Problem Possible Cause and Solution When the PortaTone is turned on or off, a popping sound is temporarily produced. This is normal and indicates that the PortaTone is receiving electrical power. The sound of the voices or rhythms seems unusual or strange. The battery power is too low. Replace the batteries. (See page 9.) There is no sound even when the keyboard is played or when a Song is being played back. Check that nothing is connected to the PHONES/AUX OUT jack on the rear panel. When a set of headphones is plugged into this jack, no sound is output. When one of the PIANO styles is selected and started, the rhythm cannot be heard. This is normal; the accompaniment of the style can only be heard when accompaniment is set to ON and keys are played in the ACMP section of the keyboard. Not all notes are heard when playing a number of notes simultaneously. Too many keys are pressed at the same time. The PortaTone is polyphonic up to a maximum of 16 notes. The Pad sound is cut off or sounds unusual. The PortaTone is polyphonic up to a maximum of 16 notes. If a style or song is playing back at the same time a Pad is played, some notes/sounds of the Pad may be omitted (or "stolen") from the accompaniment or song. The sound of the voice changes from note to note. The AWM tone generation method uses multiple recordings (samples) of an instrument across the range of the keyboard; thus, the actual sound of the voice may be slightly different from note to note. The melody part of the song doesn't play. Check that Melody Guide is turned off. The song plays back to a certain point and then pauses. Check that Melody Guide is not set to "Waiting." The notes shown in the music staves and keyboard diagram in the display do not match the keys actually played. 42 When auto accompaniment is on, the display shows the specific notes of the chords you play in the ACMP section of the keyboard. If you play a single finger chord, or an inversion of a chord, the corresponding chord will be appropriately displayed - even if the display does not exactly match the pressed keys.

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42
Troubleshooting
Problem
When the PortaTone is turned on or
off, a popping sound is temporarily
produced.
The sound of the voices or rhythms
seems unusual or strange.
There is no sound even when the
keyboard is played or when a Song is
being played back.
When one of the PIANO styles is
selected and started, the rhythm
cannot be heard.
Not all notes are heard when playing
a number of notes simultaneously.
The Pad sound is cut off or sounds
unusual.
The sound of the voice changes from
note to note.
The melody part of the song doesn’t
play.
The song plays back to a certain point
and then pauses.
The notes shown in the music staves
and keyboard diagram in the display
do not match the keys actually
played.
Possible Cause and Solution
This is normal and indicates that the PortaTone is
receiving electrical power.
The battery power is too low.
Replace the batteries.
(See page 9.)
Check that nothing is connected to the PHONES/AUX
OUT jack on the rear panel.
When a set of head-
phones is plugged into this jack, no sound is output.
This is normal; the accompaniment of the style can
only be heard when accompaniment is set to ON and
keys are played in the ACMP section of the keyboard.
Too many keys are pressed at the same time.
The
PortaTone is polyphonic up to a maximum of 16
notes.
The PortaTone is polyphonic up to a maximum of 16
notes.
If a style or song is playing back at the same
time a Pad is played, some notes/sounds of the Pad
may be omitted (or “stolen”) from the accompani-
ment or song.
The AWM tone generation method uses multiple
recordings (samples) of an instrument across the
range of the keyboard; thus, the actual sound of the
voice may be slightly different from note to note.
Check that Melody Guide is turned off.
Check that Melody Guide is not set to “Waiting.”
When auto accompaniment is on, the display shows
the specific notes of the chords you play in the ACMP
section of the keyboard.
If you play a single finger
chord, or an inversion of a chord, the corresponding
chord will be appropriately displayed — even if the
display does not exactly match the pressed keys.