Yamaha Electone EL-100 Owner's Manual page 124

Problem
REGISTRATION MEMORY
Certain functions have not been memorized to
Registration Memory.
An error occurs and the registration data is not
recorded to M.D.R., when executing To Disk
operation.
A simple beep sound is produced when I press the
Basic Regist. Button.
MUSIC DISK RECORDER
Recording or playback cannot be performed.
A total of 40 songs cannot be recorded.
Recording is stopped before the performance is
finished, or the Song Copy function cannot be
executed.
The rhythm does not start at the beginning of a
recording, or stops in the middle of the performance.
The notes of the recording are "stuck" and sound
continuously.
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Possible Cause and Solution
Some functions will not be memorized.
(See page 67 for more information.)
Your operation may be wrong or the Write-protect tab of the floppy disk is set
to on.
When the contents of the SEQ buttons are different from Electone's default
settings (you may have loaded the sequence data from the upper models),
pressing one of the Basic Regist. buttons restores the original data and give a
simple beep sound to notify it.
The PLAY or RECORD section buttons for selecting parts may be turned off.
Turn on the appropriate PLAY or RECORD buttons.
If some song numbers contain a large amount of recorded data, the disk may
not have enough available memory left to record the normal maximum of 40
songs. Check the remaining memory.
● The amount of recorded data on the disk is close to the maximum limit.
Either use another disk or delete the data of any unnecessary song number.
● The length of a subsequently recorded part cannot exceed the length of the
previously recorded parts. If you want to change the song length, first
delete the existing song and record again.
The M.D.R. is designed so that the rhythm cannot be started at the very
beginning of a recording. If you wish to use the rhythm, start it after the
available memory display appears on the M.D.R. display.
During playback, you removed the disk by pressing the EJECT button.
Whenever you wish to stop playback, always press the STOP button.