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How to reset the black drum unit on a cm6040f printer

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Quero adquirir codigo reset para impressora brother mfc 7220

Posted on Apr 23, 2009

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Hp cm 6040f half tone calibration error


Reset the NVRAM, HP support and google the procedure.Also, may be physical defect from the printer:
- ITB
- Fuser
- All cartridges
The only other parts involved with imaging would be the laser itself, or some kind of power problem where the laser isnt getting charged enough. You could try plugging it into a different wall outlet without a surge protector to confirm power source problems.
The imaging drums should all be included in the toner cartridges. They should have been ruled out when you swapped them before, its also unlikely all 4 drums would go bad at the same time.
Also, are you using refills or OEM cartridges? It shouldn't matter but refills/refurbs can have some strange defects. If you have a spare teh same model of printer lying around you could swap the cartridges out from a working machine and see if the problem travels with the cartridges or not.
Regards, Mike

Oct 20, 2015 | HP Color LaserJet CM6040f MFP Q3939A...

1 Answer

Sharp MX-3100; what does DK mean


h r u . DK MEANS black drum life is over need to replace black drum unit or Reset black drum unit counter.

To clear this you need to clear this easy you want
# , * , c , *
To enter service mode
Type in code 24 press start
Then you want sub code07
Then you can select what you want to clear so the bk drum unit

Feb 26, 2015 | SHARP MX-3100N

1 Answer

Not recognize yellow and magentadrum cartridges


they may be dry or old stock or out of ink , you need to replace them

Jun 17, 2013 | HP Color LaserJet CM6040f MFP Q3939A...

1 Answer

HP Color LaserJet CM6040f


If you are looking for the printer driver for this model HP printer then -
You can download the HP printer drivers from their supportWEB site. Please click on this link and
select your model printer to download:- http://welcome.hp.com/country/us/en/support.html

Sep 05, 2011 | HP Color LaserJet CM6040f MFP Q3939A...

2 Answers

I have hp colour laserjet cm6040f mfp, that displays error 50.A fuser error. pls your help is so much important


You will need to order a fuser and replace it or call a service tech who can. The problem is that the electronics on the fuser have actually burned out, so that is why the whole fuser needs to be replaced.

Aug 29, 2011 | HP Color LaserJet CM6040f MFP Q3939A...

1 Answer

We have an HP Color Laserjet 2840 printer in our office. We were low on our black ink drum, bought a new drum and installed it. Copies are coming out perfectly but the "replace black...


The 2840 is a slightly different sort of machine when it comes to supplies. There is a main imaging drum unit which works for all four colors, and then there of course are the 4 colors. If the unit was asking for a drum unit then you should have instaled a Q3964A. It is entirely possible that your drum unit and black cartridge both expired at the same time, in which case, you need a black toner cartridge now.

Jul 28, 2011 | HP LaserJet 2840 All-In-One Printer

1 Answer

My printer says drum troubleshooting contact guide manual and maintence I did eveything but still not working


Hi there,
If the display shows drum error you can try cleaning it by following the steps below:
1. Open the front cover. 2. Pull the drum (black) and toner (gray) towards you, put a little force on it. 3. Remove the toner by holding down the tab on the side of the drum, then pull the toner out. 4. Use a dry lint-free cloth to clean the roller inside the drum unit. Make sure to remove any excess toner from it. 5. Put the toner back to the drum, make sure that it clicks, Reinstall the drum and toner back to the machine, 6. Close the cover.

If the display still shows drum error, go ahead and do the drum reset.

1. Open the front cover 2. Press the Options button on the control panel 3. The display should show "Replace Drum - 1. Yes 2. No 4. Press 1 to reset the drum count 5. Close front cover. The display should show the date & time
If still it shows drum error, The drum unit needs to be replace. After replacing the drum unit, do the drum reset again,
Hope this helps.

May 08, 2011 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Machine is asking for U28 replace black drums - I replaced black tone cartridge, the opc Drum Unit and the Toner Waste Container and the machine is still inoperative


on the back of the drum unit is a little "flag" that activates a sensor when you insert the drum to reset the drum counter. if the drum is replaced incorrectly or is from a poor supplier then the flag will be in the wrong position and when inserted will not reset the counter. try another black drum to reset the counter, do not discard the drum as the technician that visits in future can reset the flag for you.

Apr 17, 2010 | Panasonic DP-C263 Copier

1 Answer

What does code: DK means?. How can I fix it?


This code indicates that the Black Drum has reached 100k. It could also be the black developer and primary transfer belt are at 100k.

DC = Drum Cyan
DM = Drum Magenta
DY = D
rum Yellow
DK = Drum blacK


Even if it is reset you will still need the drum unit or drum/mc kit replaced very soon. These units do not last much longer than specified. After this the print quality deteriorates rapidly. Eventually the drum edges wear away so much that they can force developer out of the dev tank. You can usually get away with not replacing the K dev. If you reset the K dev at the same time as replacing the K drum unit, the machine adjusts itself can function normally. A dev normally lasts 200-300K. The primary belt unit lasts longer than the 100K spec and often beyond 200K out of them before replacement or refurbishment.

Finally, make sure that the Firmware is up to date.

Sep 30, 2009 | Sharp MX-3501N All-In-One Printer

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