Question about HP LaserJet 2420 Printer

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Malfunctioned Hi, I'm really confused why the face down roller shaft has malfunctioned. It doesn't work anymore... I tried dismantling almost entire parts of it and replaced its small gear assembly to no avail. Please... i need help.

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You problem is not (usually not) the output roller at all but the gears located on the sidewall on the left inside the caity where the fuser installs. There is a repair kit out to fix all of the issues relating to the fuser grinding, machine noise and output roller issues all at one time. It's available at Seattle Platen 1-800-221-2388. Just ask for Dale and tell him you need the 2400 gear repair kit. It runs 10 to 15 dollars.

Hope that helps you.

Posted on Feb 19, 2009

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Hi andjam01,

Please follow the steps below on how to clean the roller of Lexmark E120.

1. Remove the fill plug from the right side of the cartridge. (Developer roller facing away from you). Dump out any remaining toner from the hopper.

2. On the left side, remove the two small screws and the gear cover.

3. Remove the center screw on the developer roller cover.

4. Lift up the developer roller cover from the center, and remove. Be careful not to damage the plastic pins on the cover.

5. Remove the doctor blade spring.

6. The doctor blade is now loose. Carefully lift it out, watching the contact spring on the right side. Also, be careful not to damage the retaining blade that is located under the doctor blade.

7. On the large black drive gear, there is a locking star washer pressed onto the shaft. With a small pair of wire cutters, cut the old washer off, and remove. You can try to bend up the different legs of the washer, but that is very time consuming, and most likely at least one leg will break anyway and the washer will still have to be replaced.

8. Remove the large black drive gear. Make sure you don't loose the small flat washer from under where the star washer was.

9. On the white developer roller gear, take the tips of your small wire cutters, and place them into the two small holes. Spin the gear so the metal shaft is in the slot on the opposite side of the gear. Remove the gear.

10. Remove all the gears.

11. Remove the three screws and gear alignment plate.

12. With a small flat head jeweler's screwdriver, pry off the metal lock from the developer roller bushing.

13. Turn the developer roller bushing so the plastic tab is facing up.

14. Lift the developer roller out of the cartridge. The bushing will come off with the roller.

15. . Clean out any remaining toner from the hopper. Make sure the developer roller retaining blade does not get damaged!
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Hope it helps.

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