I replaced the image unit and the message that the image unit needs to be replaced does not go away please help.

R11 is not an error message it is the number of shots left before the image buffer is full and you have to stop taking images untill there is space in the buffer

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.
Vertical streaks on page
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.
Vertical Banding on images
Seal failure on the imaging unit. Occasionally seal leaks have been seen from the Imaging Unit.
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)
Replacing the imaging unit

Image unit end .You need replace the K =Black image unit,or enter in the service mode,open the front door,pull out the image unit K push the image unit select IU unit press the New release windows ,close the front cover and the copier must be ready to copy.

Hello.

Causes :

• The remaining life of the imaging unit is less than 10% of its life.
• The remaining life of the imaging unit is less than 0% of its life.

solution:

• Replace the Imaging unit (Toner). remove the old toner and replace it with a new one, look in the user manual for detailed steps.
  

Additional help :

if you need further assistance on how to replace the Toner, please give me the Printer's Brand and Model and i will provide you with detailed steps.

Thank you.

try this:

1. Press # sign; then 1934
2. Press MENU
3. Arrow to Tech Mode (not User Mode); press OK
4. DataSetup; move arrow to Clear All Memory
5. Clear All Memory; press OK
6. Choose coonutry; press OK; will erase and print out configuration report; clearing the transfer belt error.

This wipes out the counter on the Transfer Belt. Clear All Memory means all your settings are wiped out. This also reset all the counters EXCEPT the imaging unit counter.

Trust this helps. Please vote.

Magenta Image unit mite be the problem have it replaced if it already was then mite have a bad new one also check the sensor that monitors the toner for the magenta Also pull out the magenta image unit shake side to side to spread out the develop inside the image unit along the entire length of the image unit reseat the image unit.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

https://www.office.xerox.com/partners/SBSF_Docs/SB710.pdf Hopefully this can help you.

Hi rmcday: Here your problem. The imaging unit creates the image using an electro-photo process. The imaging unit consists of the following: ■ An OPC Drum ■ Waste Toner Assembly ■ Charge Roller Assembly 9.0 Consumables, Routine Maintenance Items and Options Item Life based on 5% coverage Part No. Replaceable by Black Standard Toner Cartridge Black High capacity 3,000 7,000 106R00679 106R00684 User replaceable Cyan Standard Toner Cartridge Cyan High capacity 2,000 5,000 106R00676 106R00680 User replaceable Yellow Standard Toner Cartridge Yellow High capacity 2,000 5,000 106R00678 106R00682 User replaceable Magenta Standard Toner Cartridge Magenta High capacity 2,000 5,000 106R00677 106R00681 User replaceable Imaging Unit 50,000 images 108R00593 User replaceable Transfer Belt 50,000 images 108R00594 User replaceable 500-Sheet Feeder N/A 119650600 Waste Toner Cartridge 3,000 to 5,000 pages (color 5%) 106R00683 User replaceable. Your imaging unit may have exeeded it life of 50,000 pages and will need to be replaced. Hope this helps

The Imaging unit needs to be replaced when the drum fills up with waste toner. That's what triggers the message.

When I had this problem the solution was a tiny piece of paper which was jammed in the machine.
When the jam was cleared the message went away.
Hope this helps