Needs maintenance i need to replace the developer because my copier sharp ar407 needs maintanance. i do not have a copier person currently

Maintenance doesn't necessarily mean developer replacement, if its working well, ignore developer and continue if it requires, pullout the developer unit and remove the toner hopper. Then empty the used developer and put new one. To empty, turn the dev unit upside down while rotating the magnet roller clockwise the return it in normal position and pour the new developer while turning the magnet roller clockwise until evenly distributed. Put back the toner hopper and screw back and install inside the copier then set it with 'P, Interrupt, C, Interrupt keys enter 25 press Start 2 then Execute key and allow to run till it stops then press Interrupt twice and Press 24 Start 3 Execute . Finally Switch OFF and ON.

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