Imaging Unit Problem with bizhub C450

Removed all imaging unit then below you will see PCL in every imaging unit you must clean it with soft cloth completely. When PCL is covered with dust,toner,dev etc.. the developer from your imaging unit become to fall causing developer on edge of paper(dirty copies).

replace the chip

Have you tried replacing the black imaging / drum unit?

which image unit?????

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

replace the black image unit

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

1-Re-Install the imaging unit.
2-Restart the machine.

u cant reset those , u have to change the counter chips .These are available in market

interesting... this information is covered in detail in this post http://www.fixya.com/support/t1232734-bizhub_250_malfunction_code_c2557_help

I’m happy to assist further over the phone at https://www.6ya.com/expert/norman_d2fa496dce30c65d

Just reset the chip. More details you can find here: http://www.chipreset.eu

sounds like the wrong image unit. Oce and ollivetti have the same machine and take the same image unit but with a different chip. Make sure it is a genuine konica minolta image unit. If need be try putting the chip from the old unit on the new one and see if lays down the colour