Yamaha Electone EL-17 Owner's Manual - page 27
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T r o u b l e s h o o t i n g
Please note that the appearance of any of following phenomena does not indicate a mechanical failure of the
Electone.
Problem
No sound is produced from the Electone's
speakers.
A cracking noise is sometimes heard.
Interference from radio, TV, or other
sources occurs.
The sound of the Electone causes
surrounding objects to resonate.
When too many keys are pressed, not all
of the notes sound.
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.
The Pedal voices, or the Lead voices from
the Upper keyboard do not sound, even
though the volume is properly set.
The rhythm does not start.
Possible Cause and Solution
The plug of the cable from the speaker unit is disconnected.
Refer to the separate "Assembly Instructions", and reconnect
the plug securely.
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.
Total polyphonic capacity (notes sounding for both Upper and
Lower Keyboards) is 10 notes.
The Keyboard Percussion function has been turned on. When
not using the function, be sure to turn it off. (See page 18.)
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).
To Lower function is on. Turn off the function by pressing the
appropriate buttons in the Pedalboard or Lower keyboard sec-
tion.
Check the volume level of the RHYTHM Section.