Have a konica minolta magicolor 8650 with this message on the screen IU need to be replaces YMC , Only black printing possible , machine status 8/21 Can it be cleared?

replace the print head. That's the part that houses the LASER. try this site for the part



Precision Roller Printer Toner Cartridges Parts and Supplies Office...


if not try local Konica Minolta dealer

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

Polygon motor is located inside the print head along with the LASER

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

Could not find that code in the 8650 service manual

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

replace the yellow print head which houses the LASER for the yellow drum print head is located below the yellow image unit (each color has one). It is a "######" to get out, recommend a tech do this.

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

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.

Replace when machine tells you to. But in this case looks like the Magenta and yellow image units need to be replace now

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

Start the Konica Minolta Status application and check the error, you should get more info there.

Reset your Toners and Imaging units for Bizhub and CF series.
http://www.chipreset.eu

does this happen though the document feeder or on the main glass if printing was fine then black cartridge and drum are ok its the scanner roller replaced or there something causing a problem

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

Pleas check the imagine unit drum, is it clean or does there are the same marks as in paper.
if yes, the IU drum cleaning or drum itself is damaged and needs to be replaced.

Try:
after sending a print job, when printer has take a paper from tray, open cover, open cover before the paper enter the fusing unit, then you can see, if the mark is allready in the paper then the problem is in the IU or toner cartridge, if not, then fusing unit rollers.

You need to clean the printer. See your manual for instructions. It is probably dust on the laser lens