Sharp FO-IS115N - Manual (Page 125)

Replacing the Drum Cartridge
120
8
Replace the toner cartridge and close the side cover, inner cover, and
top cover (Steps 7 and 8 on page 20).
When the display shows [TONER EXCHANGED?] / [1 = NEW, 2 = OLD],
press for “OLD” and then (Steps 9 and 10 on pages 20 and
21) .
When finished, reset the drum cartridge counter as explained on page
21.
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