Bizhub C450 Print Shadow!!!

[bizhubc450bites]

Howdy folks,

New to this site and would greatly appreciate your assistance. Working with a Bizhub C450 that has started to print with a shadow on black and white prints. This problem does not show up on color prints. I've read the manual in pdf and print (front and back) and cannot resolve the issue. Would you please assist me in resolving the issue?

[Si@danwood]

Had this the other day to solve it i performed an initialisation and stabilization(had to do this 3 times before it completed "ok") then performed a gradation for all 3 modes, 3 times each and cured the problem stone dead hope this helps...Si

[fixthecopier]

the black lens is most likely dirty. Take the cleaning wand put a fresh pad on it, wet it with alcohol, and put a lot of pressure on it while you scrub back and forth. Then clean it again with a dry pad.

[bizhubc450bites]

Thank you guys for the help. I sincerely appreciate your assistance.

[don]

Dear friend,

Are you printing on coated paper. Have you printed halftone and internal print to check this issue. This problem may be occur due coated paper and may be temp.
Run blank paper through the engine and check. This will clean the shadow mark present on the rollers.

Regds,

[bizhubc450bites]

Thank you for the helpful tips. I sincerely appreciate your assistance.

[tuggerplum]

This problem may also be solved by running the test print for the 4 colors in service mode to see if it may be a bad IU issue, the C450 is terrible at having premature IU failure. To test this out go into service mode, select test prints and then reverse lattice and choose CMYK, you can set the density to different values, the default is 255 but 168 works well for me if you get shadows on lighter prints. If the colors all looks good then it may be that the 4 LED's needs to be cleaned by hand, I just remove all the IU's and transfer belt and go in from side of the waste toner box and cleaned it out properly with a clean rag damped in some alcohol and then wipe it dry. Hope this solve your problem.

[PerthKMTECH]

I've seen this numerous times, and assuming you have set up the machine properly and its well maintained, it's usually the client using poor quality cheap imported paper. Always keep a known good quality paper for testing in these situations.

also on machines that do a very high voliume of black and white printing, there is a known issue with intermittant black smudge marks and shaddows. There is a black imaging unit modification required - obviously this means that the customer can no longer be responcible for changing these if thats the issue.

[bizhubc450bites]

Thank you all for the great tips. I sincerely appreciate everyone’s assistance.

[DUKEY]

yo never wet the wand!!! it's dry toner you replace the pad with a new one after cleaning all lenses... and you just push in and pull out..