Hi, you can
clean the corona wire easy, just follow those steps:
1) Turn of printer power and unplug all cord including phone cord.
2) Make sure the scanner is closed, then lift open the top cover by its handle.
3) Remove both the drum unit and toner cartridge assembly for the color desired to be replaced.
4) With the drum unit removed, push down the GREEN lock lever to remove the toner cartridge.
5) Slide the GREEN tab left to right several times to clean the unit's primary corona wire.
6) Before installing new toner cartridge, shake it from side to side to distribute toner.
7) Remove protective cover from cartridge.
8) Insert cartridge into drum unit until it snaps in place.
9) Ensure that you are inserting the correct color toner cartridge into
its proper place and then slide the drum unit into the printer.
10) Close the top of the machine and then reconnect all cords; turn on power to ensure proper installation.
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