Troubleshooting - Yamaha Electone EL-57 Owner's Manual

Troubleshooting

Please note that the appearance of any of following phenomena does not indicate a mechanical failure
of the Electone.
GENERAL OPERATION
Some of the LEDs in the DISPLAY SELECT section
do not light.
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.
The Electone panel does not function normally or
the content of the memorized data has changed.
VOICES/RHYTHMS
When selecting a dotted button voice or rhythm,
the voice or rhythm title at the top of the LCD does
not match the voices or rhythms.
When too many keys are pressed, not all of the notes
sound.
When playing a Pedal voice from the Lower
keyboard (using the To Lower function), pressing
the Lower keyboard's Sustain button does not turn
on Sustain.
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.
13
The Pedal voices do not sound, even though the
volume is properly set.
Even though a Dotted button's rhythm has been
selected and started, the pattern does not sound.
132
Problem Possible Cause and Solution
The LEDs of on/off buttons [VOICE EDIT, RHYTHM PROGRAM, and
TREMOLO (FAST)] are lit when those functions are turned on. The LEDs of
other function's buttons momentarily flash when the functions are selected.
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.
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. (page 57)
The currently assigned voice or rhythm is displayed at the top of the LCD, and
remains until another voice or rhythm has been selected.
Total polyphonic capacity (notes sounding for both Upper and Lower
Keyboards) is 12 notes.
Even though the Pedal voice is being played from the Lower keyboard, it is
still a Pedal voice; turn the Sustain on with the Pedal Sustain button.
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.
Also check the Upper/Lower Balance control on the Voice Display. (page 20)
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. (page 49)
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 (highest-note priority).
The Single Finger or Fingered Chord mode of Auto Bass Chord is on. Turn off
the mode in the display. (page 46)
Since the Dotted buttons contain User rhythms, no rhythm will sound if a
pattern has not been saved to the selected Dotted button.