Olympus V-90 - Manual (Page 14)

When folder [S] is selected, you cannot erase all the
messages it contains. Only messages of a selected date
can be erased.
Resetting the recorder to the initial status (RESET)
Press and hold the STOP and ERASE buttons
simultaneously for more than 2 seconds. The LCD
shows [RESET] and [YES?] alternately.
Press the ERASE button again within 4 seconds. The
LCD shows [WAIT]. All messages in all folders are
erased and the recorder is reset to the default setting.
(This takes about 30 seconds.)
This also resets the current time and other settings
to their initial status, and the recorder enters the
clock adjustment mode.
If any button other than the ERASE button is pressed
while the LCD shows [ERASE], [ALL ERASE] or
[RESET] and [YES?] alternately or if the ERASE button
is not pressed again within four seconds of the start of
the alternate display, the message erase or reset
operation will be aborted and the LCD returns to the
previous display condition.
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