Sharp FO-DC500 - Manual (Page 46)

Programming Auto-Dial Numbers
44
5
To clear a Rapid Key, press the Rapid Key.
To clear a Speed Dial number, press and then enter the number
with the numeric keys. (If you enter less than three digits, press to
complete the entry.)
6
Press .
7
Return to Step 5 to clear another number, or press repeatedly to
return to the date and time display.
SPEED DIAL
START/
ENTER
START/
ENTER
STOP