Troubleshooting - Yamaha Electone EL-27 Owner's Manual

Troubleshooting

Please note that the appearance of any of following phenomena does not indicate a mechanical
failure of the Electone.
A cracking noise is sometimes heard.
Interference from radio, TV, or other sources
occurs.
The sound of the Electone causes
surrounding objects to resonate.
The Electone panel does not function
normally or the content of the memorized
data has changed.
When too many keys are pressed, not all of
the notes sound.
The sound is too soft, despite the volume
being set to the maximum.
Switching voices causes the volume to
change, despite their having identical
volume settings.
When keys on the Lower keyboard or
Pedalboard are pressed, the sounds of
percussion instruments are also heard.
Only one sound is heard when two notes of
the Lead or Pedal voices are simultaneously
played.
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Problem Possible Cause and Solution
Noise may be produced when either an electrical appliance is
turned on or off, or an electric power tool (such as drill) is used in
the proximity of the Electone. If this occurs, plug the Electone into
an electrical outlet located as far as possible from the device that
seems to be the source of the problem.
This is caused by the proximity of a high-power broadcasting station
or amateur ham radio setup.
Because the Electone is capable of producing powerful bass
sounds, resonance may be caused in surrounding objects, such as
cabinets or glass windows. To avoid this, relocate the objects or
lower the Electone's volume.
This happens very rarely. Occasionally, power surges and spikes
due to electrical storms or other reasons may cause the Electone to
malfunction and/or alter the contents of memorized data. If this
happens, perform the Power On Reset operation to reset the
Electone. (See page 49.)
Total polyphonic capacity (notes sounding for both Upper and
Lower Keyboards) is 11 notes.
Check all of the volume controls, making sure that they are set to
suitable levels: the panel Volume controls for each voice section,
the Master Volume dial, and the Expression Pedal.
The volume of certain voices may seem lower than that of others.
Adjust the balance of the sound with the Volume control within the
appropriate Voice Condition display.
The Keyboard Percussion function has been turned on. When not
using the function, be sure to turn it off. (See page 43.)
For practical performance reasons, the Electone has been
designed so that one note of the Lead or Pedal voices can be
played at a time. If several keys are pressed at once, only the
highest note will be sounded (high-note priority).