Question about Xerox Phaser 7400/DXF Laser Printer

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Error message: cyan imaging unit is either missing or unseated

The error message is: install or reseat cyan imaging unit.
The issue is that normally you'll get warning when either the imaging unit or toner cartridge are running low or need replacing - unfortunately, one minute I printed something out and the next minute I was getting this error message. There is plenty of toner in the toner cartridge and I know the imaging unit is not near end of life - so I don't want to spend the money to buy a new one - because I'm sure it's just not reading it properly.
Any help would be greatly appreciated.

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  • MorMerMom Apr 27, 2009

    Cyan imaging unit replaced when display indicates but display still says the imaging unit needs to be replaced even though it was removed and reseated several times.

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The problem is with the top cover assembly. It could be a few things. I would first try the toner sensor flags(the magnet may not be strong enough to read properly). Also replace the toner cartidge because it's magnet may also have gotten weak. Third, I would try the Toner sensor board.

I have had this problem with many printers and normally it is just the flags because of the weak magnets.

Posted on Sep 08, 2009

  • print-or-die Sep 09, 2009

    I must apologize.. my previous post was for a 7300, not a 7400..



    Sorry.

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Michel's solution works! I had just bought my 7300N used and everything was great except I kept getting a "cyan toner is unseated" error message. I mean, I would run a test page and then I'd get the error...like every other page. I read through the other suggestions on this page and I tried the "crazy" suggestion of removing the foam on the flag and putting sticky tack on the side of the flags and my problem is solved. I've so far printed multiple pages with no trouble. So go to: http://www.michelsplace.co.uk/xerox-7300.html Michel mentions that the foam you take off is to sound deaden when the flags hit, but I can't hear anything different over the general hum of the printer, so I'm happy.

Posted on May 05, 2013

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Posted on Jan 02, 2017

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1 Answer

How do I reset ms610 imaging unit?


When you get the error message "Replace imaging unit, 0 estimated pgs remain [84.3x]" This means the imaging unit has reached end of life and needs to be replaced. The device will not print, and this message will not be cleared, unless you replace it with part number 50F0Z00
(or 500z)
Vertical streaking. If the imaging unit is near end of life, or the device has had problems with non standard toner, vertical streaks may occur on the page. Replacing the imaging unit will resolve the problem.
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Vertical band at top of page. This typically appears on printed images, but can also appear on text. The most likely cause is toner contamination on the charge roll, however if the band is still visible after printing 30-40 continuous pages this means the imaging unit needs to be replaced.
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Toner will be seen on the main frame near the Imaging Unit sides.
If toner build up is excessive, it may even fall into the Tray below. Cleanup with a toner vacuum may be needed.
Replace the Imaging Unit to fix the problem.
Spots, scratches, marks on the page. If they are random, this indicates a problem with toner scatter.If they are repeating patterns, measure the distance between matching marks or spots. If the distance is one of 97mm, 47mm or 38mm, this indicates marks or dents on the imaging unit and it will need to be replaced.
You receive the message Replace defective imaging unit The imaging unit is defective and needs to be replaced. If you just installed it, it will be covered under warranty - contact Lexmark Australia on 1300 362 192
You receive the message Reinstall missing or unresponsive imaging unit and the below instructions don't resolve the problem. Try one or more of the following:
  • Check if the imaging unit is missing. If missing, install the imaging unit.For information on installing the imaging unit, see the "Replacing supplies" section of your device's User's Guide
  • If the imaging unit is installed, then remove the unresponsive imaging unit, and then reinstall it.
  • Note: If the message appears after reinstalling the supply, then the imaging unit is defective. Replace the imaging unit.
You receive the message Replace unsupported imaging unit The imaging unit you attempted to install was either non-genuine, or was from a different region. Buy a genuine Lexmark imaging unit from an authorised Lexmark supplier in your country/region.
You receive a 31.6x error One of the following errors is shown on the display:
31.60 Imaging unit smart chip error
31.61 Imaging unit I2C packet timeout
31.62 Imaging unit I2C packet has been sent but code timed-out on receiving the data (callback)
31.63 Imaging unit security error in the send challenge sequence
31.64 Imaging unit ROM signature error
31.65 Imaging unit stuck busy (status register and/or CRI Arbiter register report busy)
31.66 Toner failed to replenish into the imaging unit
In this case you need to ensure that the imaging unit is properly installed. If yes, check if the imaging unit is supported. Replace with a supported imaging unit if necessary.
If the problem remains, you will need to organise a Lexmark service call (Australia 1300 362 192)
You receive error message 32.11 Imaging unit smart chip compatibility error This could be caused by an unsupported imaging unit (non-genuine or incorrect region). Replace with correct imaging unit to clear this error. If your imaging unit is supported, you will need to organise a Lexmark service call (Australia 1300 362 192).
You receive error message 84 Imaging unit low If expected, replace the imaging unit. If unexpected, call Lexmark Support (Australia 1300 362 192)
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