Sharp FO-IS125N - Manual (Page 155)

Replacing the Drum Cartridge
153
11. Maintenance
8
Replace the toner cartridge and close the side cover, inner cover, and
top cover (Steps 7 and 8 on page 21).
When the display shows [TONER EXCHANGED?] / [1 = NEW, 2 = OLD],
press for “OLD” and then (Steps 9 and 10 on pages 21 and
22) .
When finished, reset the drum cartridge counter as explained on page
22.
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