I am getting a yellow background when printing on bizhub c450, no background when photocopying

SOURCE: Imaging Unit Problem with bizhub C450

On the end of the image unit you will find a white bit of plastic with a small screw in the middle, make sure this screw is tight and then reinstall the units(give the units a bit of a shake too)

SOURCE: Bizhub C450

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

SOURCE: Printing labels on bizhub C450

Hi nwillett,
Yes and no, sorry if that doesn't make much sense.
For years Minolta recommended Avery labels, but these days they recomment labels manufactured by Howard Smith Papers, their website is http://www.hspg.com/
The thing with labels is always to use the one your copier service company suggests. Otherwise they'll invalidate you contract and you'll be liable for callouts and repairs caused by using Avery labels.
However, Avery labels are good and I have experienced very few problems with them I pressume you using the lables in the correct orientation and also using the manual bypass to feed them.
Regards
Taminol

Konica Minolta Error Codes and Solutions

• 210 Answers
• Posted on Aug 23, 2009

SOURCE: How do I reset the Unit Life after replacing black imaging unit?

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

SOURCE: how I can reset counter imaging unit bizhub c450?

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