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I replaced the fuser gear and now large black areas appear on three places on the page

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  • 374 Answers

Try running this test to see if the black areas are being put on in the fusing process or by components prior to the fuser.

Print one page and time how many seconds it takes from the time that you hear the main drive motor start up until you first see the paper starting to exit the printer. Then print another page and turn the printer power off when the paper is approximately half way through the printer.

(If if took 30 seconds for page one, then kill the power 15 seconds after the motor starts for page 2)

Then open the printer and remove the paper. If the black areas are visible on the portion of the paper that has NOT yet passed through the fuser, then your problem is either in the toner cartridge or being put of the paper by dirty rollers which feed the paper to the cartridge. Use a soft dry cloth to clean any spilled toner off the rollers and off of the drum inside the cartridge. If this fails to fix the problem, replace the cartridge.

If the black ares are ONLY visible on the portion of the paper that has passed through the fuser, then clean or replace the fuser.

If you have any additional questions contact me by clicking on the "Add a comment" link located under your problem description on FixYa. Also, if you believe that this information was helpful to you, please rate my solution using FixYa's "Solution Helpful" rating scale.
Best regards,
Yavacotech

Posted on Mar 25, 2011

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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

Pages sticking to fuserwhen leading ege has wide


Replace the fuser, its overheating and that would cause the pages to stick the way they have been when trying to print pages of lots of black solid ink.

Apr 19, 2010 | IBM Infoprint 1572 Laser Printer

1 Answer

Copy commences and then jam on the right side of machine after the paper receives the toner and prior to hot area. Does not appear to go though this second set of rollers.


This means there is a problem in the fuser unit area.
Remedy
Check the fuser unit gear if its broken. Replace if out.
Check if the separator pawls are out of position. Adjust to its position.
Check if the fuser separator spring is out. Return it to its place.

Oct 30, 2009 | Sharp AR-207 Copier

2 Answers

Paper Jam E2 error


On this model, the fuser assembley is mounted to the machine mounts, two of them inboard and outboard.
If the fuser gear is not cracked, this fuser is driven by the white small drive gear on the machine.
This rests close the drive gear. Sometimes you can hear a thumping noise which is coming from the gear skipping over the fuser gear.
This gear needs to be replaced a very involved service process.
Call Xerox for further repair if this is the case. Also behind this gear are many other gears that can cause this same problem. Very involved and time-extensive to repair even for a trained Xerox technition.

Aug 11, 2009 | Xerox WorkCentre XD100 All-In-One Laser...

1 Answer

Black marks on pages


Can you stop the copy before the page gets to the fuser section? If you can and the doubling image is there you need to replace the drum cleaning blade and possible the drum as well. If the marks are there after the fuser section the problem is in the fuser. You will have to replace the Upper fixing roller. Good Luck... You may have a hard time finding the parts, this model is old and not a very popular copier..

May 16, 2009 | Minolta EP1031/1031F CS/PRO Copier

1 Answer

13 Paper Jam - but there is no paper inside!


I have a long solution (possibly) to your issue:

Error 13 Paper Jam
  • Paper jams can occur in 3 places: Entry, registration and exit.
  • If the paper isn't picking up out of the paper tray, visually inspect the pickup roller. If it looks shiny, replace it. You should also replace the separation pad as they work together. On the 4L/4P/5P/6P the pickup roller has a plastic shaft that breaks. You'll have to replace the whole pickup assembly. This requires major disassembly of the printer. Check our printer repair kits for your model printer. If you don't see it listed, email us.
  • If you have an HP 4/4+/5 with an optional 500 sheet feeder that's jamming, check the balance knob adjustment. Center it with a full **** of paper for proper operation.
  • If the paper is jamming at registration or anywhere between pickup and exit it could be a number of things. Check the paper path for torn bits of paper or label residue. On the II/III series, remove the metal registration guide plate (2 screws) and check underneath it. If the pickup rollers are moderately worn, the paper will stop just short of the registration roller. On the 4L/4P/5P/6P remove the screw holding the oblique roller assembly (Inside front of printer) and pull out and inspect the assembly and the area under it. On the HP 4/4+/5 pivot up the metal plate and check underneath it. Check the roller assembly on the left side for torn scraps of paper (a flashlight or torch is necessary).
  • Make sure paper cassettes are firmly seated, corner tabs aren't bent. Some trays have lifting springs that could pop out if tray has been dropped.
  • On HP IIP/IIP+/IIIP printers if the paper scrunches up at the toner cartridge you'll need our Inside Accordion Jam Repair Kit.
  • Check your software settings in the program you are attempting to print from. Do you have the correct paper size specified? If you have a different paper size than what is in the tray, you'll get a paper jam.
  • Exit jams are frequently caused by exit sensors. These sensors are typically mounted on the fuser assembly or adjacent to it. They are plastic arms that block and unblock an optical sensor. The arms can get stuck or knocked out of place when clearing paper jams. The optical sensors can also get dirt blocking the photo cell. Clean the sensor and check for free movement and proper installation of the sensor arms.
  • On HP II/III series exit jams are mostly caused by worn gears. The best way to troubleshoot this is to defeat the door interlock (see door interlock photo on troubleshooting page). Press down on the arm on the top right of the fuser. Initiate a test page. While holding down the arm, press one of the metal cartridge detect switches just below the door interlock. Watch the movement of the gears. You will get a 51 error because the door is open. Recycle power to get rid of error. There is an arm gear on the lower right of the fuser that can shed teeth. There is also a 14 tooth gear below the large gear on top of the fuser. You can also manually rotate the large gear and check for binding or crunching. If that happens, then replace the 14 tooth gear. On the door, there are some delivery coupler gears that mate with the fuser and drive the exit roller. Check the gears for excessive wear. Replace if necessary. If the paper gets almost all the way out and jams, replace the exit roller or the exit roller assembly. If the error occurs after fuser replacement, check and see if the connector on the left of the fuser is properly mated with the one in the printer.
  • On HP IIP/IIP+/IIIP printers if the paper has accordion folds on the bottom and jams on exit, order our Top Output Accordion Jam Repair Kit.
  • On HP 4/4+/5 printers the most common cause of exit jams is the exit assembly. Order our 4/4+/5 Exit Jam Repair Kit. Exit jams in the fuser can be caused by a broken fuser drive gear or a broken gear on the fuser. Remove the fuser and check the gear inside the printer for broken teeth. Manually turn the gears on the fuser and check for smooth operation. Check the paper exit sensor arm for proper mounting and free movement.
  • Check to make sure the rear door is closed on the printer. Open doors can cause 13 paper jam indications.
  • On the 5L/6L check the registration sensor arm below the pickup roller. Also check the exit sensor arm (bottom center of the fuser). These arms frequently get stuck or dislodged clearing paper jams. On these printers, if you are experiencing frequent paper jams, order our 5L/6L Multi-Sheet/No Feed Repair Kit
All this comes from:

http://www.fixyourownprinter.com/reference/errorcodes/hp

Good luck with it, I love the HP LaserJet 4 series of printers. I used to warm my coffee on the top of the fuser when I was doing large print jobs :-)

If this information helps, please give me a rating, thanks!

OpenSource13

Apr 07, 2009 | HP LaserJet 4 plus Printer

1 Answer

Black lines on the right side of every copy


depending on what the lines look like it could be the charge roller or transfer roller.
A defect on the charge roll appears as black areas on the front of the test page, and as light gray areas on the test page.
A defect on the PC drum of the toner cartridge appears as white areas on a dark, full–coverage test print and as black areas on the "text only" test page.
I have also seen a line with a 'ridge' on the paper. This will appear almost like an embossed line. This was caused by the fuser roller being scored by debris.

Jan 12, 2009 | Dell 1710 Laser Printer

1 Answer

Ricoh CL7000 - Black lines every 4,5 or 9 pages


Sounds like the registration clutch is faulty. The knocking maybe the fuser unit jumping gears check that unit also check that the green paper holders are all in the correct place.

Thanks Jason

Jun 30, 2008 | Ricoh Aficio CL7000 Laser Printer

1 Answer

Fuser Gear Md No. LJ 7416


You will need to purchase these gears from a brother dealer but I warn against just changing the gears you mention, fuser driver gear in printer frame will be ok unless chipped, but usally the big gear on the fuser goes as does a little white one next to it, and these are breaking becase the fuser is hard to turn, if you just change the gear, the fault will reappear after a little use, best bet is to replace fuser assy (approx $150)

Oct 27, 2007 | Brother MFC-8840D All-In-One Laser Printer

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