Question about HP LaserJet 2420 Printer

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HP2420 Manual Hi, I have a 2420n and am trying to replace the "fuser unit" (the bit under the toner cartridge in case I have named it incorrectly) I have all the parts as part of a kit - complete with rubber gloves - but cannot find instructions anywhere. From first looks I can see that I need to unscrew / dismantle several pieces so would like to know where I can find instructions or a tech manual for the printer. Many Thanks in advance

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  • Thom Klein Nov 12, 2008

    I am looking to replace the fuser in the HP2420dn and reviewed the resolution which was the PDF of the HP2420 manual. The manual only gave instructions on how to run a cleaning sheet of paper through the printer.
    Is there a more technical instruction that shows how to disassemble and replace the fuser unit?

    Thank you for your assistance - TK

  • xman28 Nov 13, 2008

    Hi i need the service mode password

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Here's a link to the service manual. Please be aware that the service PIN is incorrect in the manual and the correct is: HP2420 = 10242004, HP2430= 10243004, HP2410= 10241004.

http://www.feedroller.com/Store/Service%20Manual/LaserJet%202410%202420%20and%202430%20SM.pdf

Posted on Dec 08, 2008

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How to remove cartrage fuser error 10.10.00 after refilling

Posted on Jan 15, 2011

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rexmo
  • 30 Answers

SOURCE: HP2420 Manual

try www.tonerrefillkits.com

Posted on Nov 12, 2008

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I have a canon ir3030 there is one side sightly dark and one side sightly light in same page i need solution?


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You will probably need to replace the toner cartridge.

If you are certain it is not nearing empty, try removing the cartridge, putting in a plastic bag and giving it a little shake. Then clean the area around where the toner comes out both on the cartridge and on the printer.
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Hi Juan.
I take it that you have a laser printer; i.e. toner cartridge.
You have probably checked your user manual.
It could be that the toner cartridge is nearly empty.
Purchase a new cartridge, and carefully replace the existing cartridge.
Many cartridges have an inbuilt fuser.
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In cases of print quality issues you should always start with the imaging drum. In this case the toner cartridge. Make sure it is not a re-manufactured or refurbished toner cartridge. A lot of times when someone refurbishes the cartridge they don't replace the imaging drum (the blueish green drum under the shutter). Check for toner stuck or burned on the drum. If there is you need to replace the toner cartridge

If there is no toner stuck or burned on the imaging drum then you more than likely you will need to check or replace the Fuser in the back of the machine. The back door of the machine comes out easily enough and the fuser clips into place. **Be careful it doing to be hot.** Remove the fuser and check the rollers inside for burned toner or damage. If so replace the fuser .

You can purchase a Fuser Kit from HP or find a refurbished fuser from Depot America or OrionMarket.com for a lot less.

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Since you have already replace the toner cartridge then the most likely culprit is the fuser assy. You can test this by trying to print something and stop it by opening the cover just as the paper is trying to pass under the toner cart. Remove the toner cart carefully and look at the unfused print on the paper. Do you see the faint smudges? If not, then the problem lies with the fuser assy. This is the unit that gets hot and fuses the toner to the paper. If this is the case you will need to have a tech replace it for you.

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Are you sure it's not the transfer roller that you want to replace?? this is the roller which sits directly under the toner cartridge, the fuser sits more towards the rear of the printer. I'll list instructions for removing both. Hope this helps


To remove the transfer roller -
1. Release the left end of the transfer roller by using needle-nose pliers to pinch two tabs at
the left end of the transfer roller.
2. Use the needle-nose pliers in the same manner to release the other end.
3. Lift the transfer roller out of the printer.
The left end of the transfer roller has a spring attached. At the right end of the roller, the
spring is attached to the printer rather than to the roller. As a result, the spring at the right
end remains in the printer.


To remove the fuser -
1. Remove the back cover and the I/O cover.
2. Remove the fuser-cable cover by releasing one tab on the cover, and then
rotating the back of the cover toward the center of the printer.
3. Remove the duplexer inlet guide by releasing two tabs on the guide, and then
sliding the guide toward the back of the printer.
Reinstallation tip
Make sure that both tabs snap back into place when reinstalling the duplexer inlet guide.
4. Disconnect two cables at the left, inside, of the printer.
5. Disconnect the fuser cable at the right side of the printer.
6. Remove four screws securing the fuser.
7. Tilt the fuser slightly toward the back of the printer, and then slide the fuser out of the
back of the printer.

To remove the back cover -
1. Open the face-up delivery door all the way, and then press the door down to disengage
two door-stops.
2. Remove two screws
3. Close the face-up delivery door, and then tip the printer so that it rests on its front.
4. Open the "legal-size" cover, and then disengage one tab.
5. Lift the bottom of the cover first, and then lift the cover away from the printer.
6. Tip the printer back so that it rests on its feet.
To remove the io cover (looking at the printer from the rear, this is the small cover on the left side) -
1. Rotate the I/O cover to clear tabs at the right side of the cover.
2. Lift the cover off of the printer.

Nov 12, 2008 | Printers & Copiers

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