Sharp FO-IS115N - Manual (Page 134)

Messages and Signals
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Audible signals
TONER EMPTY The toner cartridge must be replaced. Printing is not
possible until the toner cartridge is replaced.
TONER NEAR EMPTY The toner cartridge is almost out of toner (approximately
200 pages can be printed).
TX MEMORY FULL The transmission memory is full. Wait until previously
stored transmission jobs have been completed before
setting up a new job. To check the jobs that are waiting
for transmission, see page 67.
Continuous tone 3 seconds Indicates the end of transmission,
reception, or copying.
Intermittent tone
(3 beeps) 5 seconds
(1 second on, 1
second off) Indicates incomplete transmission,
reception, or copying.