Question about HP LaserJet 4mv Printer

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I have a HP laserjet 4mv, i remove the fuser to replace it then i close the front cover of the printer now ready to put in the new one I realise I cant open the front cover cause the little lever that you press to open it is on the fuser unit. My question is, how can I open the front cover now?

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Do not understand the problem. The front panel is held in with a hook on each side but both these hooks are ON (part of) the fuser unit. So if you have the fuser unit out the front panel should not stay up at all. Can you please describe in more detail?

Posted on Nov 24, 2010

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Fuser error


Your machine is in need of a new fuser unit. HP LaserJet 2400 Maintenance Kit Installation - Fuser (Part 1 of 2) Installing the fuser. Turn the power off and unplug the printer. Wait 20 minutes for the printer to cool.
Open the back door of the printer, using enough force that the door opens completely and the hinge locks disengage, as shown below.

2400_openbackdoor.jpg Remove the 2 screws circled in red below.

2400_removebackscrews.jpg Close the back door, and then flip the printer so that it rests on its face. 2400_closebackdoor.jpg 2400_flipprinter.jpg

Next swing open the paper guard which shields the back of Tray 2 when it is installed.

2400_openpaperguard.jpg

Looking inside the Tray 2 cavity, use a flatblade screwdriver to release the two tabs--one on each side of the rear cover.
2400_pryleft_backgate.jpg 2400_pryright_backgate.jpg

Next remove the rear cover from the printer by pulling down and away.

2400_remove_rearcover.jpg

Fuser Installation Continued . . .
Pry the grey DIMM cover loose and remove it.

2400_removedimmcover.jpg

Use a small flatblade screwdriver to disengage the tab on the connector shown below and unplug the connector.

2400_unplugleftconnector.jpg

Next (on the right hand side) remove the small black plastic cover, located near the green fuser gear, which hides the other fuser wires.
2400_removewirecover1.jpg 2400_removewirecover2.jpg

Then unplug the two connectors shown below and free the yellow/white wire from its guide clasp.

2400_unplugrightconnectors.jpg

Now remove the four screws holding the fuser in place (shown below).

2400_removefuserscrews.jpg

Now remove the black plastic piece shown below, the duplexer inlet guide. Gently pry the tabs on both ends loose and slide/rotate the guide back towards the fuser to release it.
2400_removeduplexguide2.jpg 2400_removeduplexguide3.jpg

Now you can remove the fuser, just pull it straight out towards you. Don't install the new fuser until you've replaced the main motor gear, as shown below.

Replacing Fuser Drive Gear

With the fuser removed, look into the printer and locate the main fuser drive gear on the left side of the fuser cavity (gear circled in red below).

2400_geartoberemoved.jpg

Use a flathead screwdriver to pry the gear's release tab and remove the gear by sliding it off its metal bar.

2400_gearreleasetab.jpg 2400_removegear.jpg

Slide the new gear onto the metal bar--make sure the gear's release tab faces outwards so it will be accessible again--and lock the gear firmly in place.

Now repeat the fuser removal process backwards as you install the New Fuser:

Insert the new fuser and replace the four fuser screws. Replace the black plastic duplexer inlet guide, making sure both tabs click in place. Re-plug the single connector on the left side, and the two connectors on the right side. Replace the wire cover on the right side. Reinstall the DIMM cover. Finally, replace the back cover with its screws.



This is a difficult installation which should be done by a technician. Good luck with it !

Sep 23, 2011 | HP LaserJet 2420 Printer

1 Answer

Light gray roller marks over the entire page and slightly faded printing but not indicating a need for a new cartridge.


check the fuser for signs of wear, if all looks intact, if the whole page is being coated, the problem is either with the drum in the tonor or the transfer roller

May 18, 2011 | HP LaserJet 4mv Printer

1 Answer

Paper jammed at this time error message show on control panel 13.05.00-Jam in top cover area open front covers and Transfer unit. Fuser is hot transfer unit can be easily damaged. Check left side of...


This error comes when media doesn't come to fuser delivery sencor with in the specified time it may be due to improper paper picking or fault in registration ***...
clean the paper feed rooler & registration *** path ur problem will resolve defin...........

Jul 14, 2010 | HP LaserJet M4345 MultiFunction Printer

1 Answer

HP LaserJet 4MV '50 service' on an HP LaserJet 4MV printer Can it be cleared without resorting to repairs or replacement parts?


You could remove the fuser, turn the machine off, and wait an hour. It may reset the error. However, if the error still persists, it will be a parts replacement of the fuser, low voltage power supply, or the DC controller. 90% it is the fuser. Good luck.

Apr 21, 2010 | HP Office Equipment & Supplies

2 Answers

How to replace image fuser kit for hp laserjet 4700n


turn off the machine. open upper front cover. remove the old fuser and insert the new one. turn on the machine and enjoy your printer with new fuser kit.

Jan 20, 2010 | HP LaserJet 4700 Printer

2 Answers

How do I get to the Fuser Film on this printer so I can replace it


This is a complex job. Side panels are clipped on only & need to be removed first. Then remove front cover ( is clipped at top ). Then remove top cover & rear cover ( screws ). The fuser is now visible & there are about 2 or 3 screws on each side that need to be removed before fuser will come out. Large Gear needs to be removed from L/H/S gear train before removing fuser. There are lugs on the fuser on both sides and little bit of pressure to frame & fuser will allow the fuser to be removed.
Then dismantle fuser & refit fixing film.

Oct 29, 2009 | HP LaserJet 1020 Printer

1 Answer

Parer jammed in ouput tray


usually paper jams in the fuser...not very easy to pull out if you are not a printer repair person. most of the times you have to remove the upper covers first cover just snaps and second cover got screws,after that remove the fuser assy. to clean the paper out,put it back and ready to work.

Aug 04, 2009 | HP Color LaserJet 2600n Printer

1 Answer

Need to change out a fuser kit


1. Turn the printer off.
2. Open the top cover.
3. Grasp the purple handles on the fuser.
4. Remove the old fuser from the printer.
5. Install the new fuser.
6. Close the top cover.
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00366229/c00366229.pdf

Mar 20, 2009 | HP LaserJet 4700 Printer

1 Answer

HP 4MV Printr and ip address


Scroll through the menus until you get to the I/O section. I don't think vista supports the HP 4MV

Mar 12, 2009 | HP LaserJet 4mv Printer

1 Answer

I can only print by manually feeding in each page -HP 4MV Printer


Good old 4MV.
paper jam is just the way the printer i stelling you "something" wrong with paper feed".
you need to locate a "4MV repair kit" , they are not cheap. but, if you wan to keep the printer, it is worth it.
http://www.fixyourownprinter.com/kits/hp/K78 cost of the ket is $50
includes Instruction CD rollers, and other repairable parts.

Dec 15, 2008 | HP LaserJet 4mv Printer

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