Line printing on all pages of my Konica Minolta Bizhub c550

[Albert]

It sounds like it is definately on the CYAN LED. It is the place that you clean with the long stick, but sometimes the pad needs a good soak with IPA (isopropyl alchohol) to shift the muck.

Hi I have the same problem on my Bizhub C500 I cant figure out where to find the Cyan Led, and where do I find that long stick & pad, Can you please help me, thank you

[ineo+6501]

Hello Albert.

Is your machine a bizhub PRO C500? If so this is a very different beast to the C550.
It does not have a cleaning stick and you need the central Belt/Drum/Dev unit pulling out to get into the likely causes.
The Production machines are more labour intensive than the office stuff and if you are an end user I wouldn't attempt to fix it yourself if I was you.

[Albert]

Hi, yes is a PRO C500 when I print individual colors I get lines on the yellow and magenta same lines on both colors. I have IT background and live in a remote area I am unable to find a technician to help me deal with the problem, can you help me further to fix this line problem. I already purchased a new developer unit for the yellow but still have the line on each page. Thank you

[Stirton.M]

Are the lines physical lines in colour or white lines through the colour?

If they are coloured lines, do the lines appear from lead edge to trail edge outside of the printed image, or are they contained within the print image?

If you can post a scanned image of the problem, that would be a great help too.

Things to do in the meantime, assuming coloured lines is the problem.

I am assuming you are familiar with the removal of the process unit since you referenced replacing the developer unit.

First thing would be, swap the charge wires for each of the colours, one at a time. For example, you get a line in yellow, swap the yellow charge unit with the black one. Do a halftone test to see if the black now has this problem. Do this for all the affected colours.

If no change, then swap the drum units in the same manner. Keep note of which drum was in which location so you can return them to where they originally came out of if that does not yield any results.

[emujo]

Sirton...after making a valid point about asking a question about a different MFP in an established thread, I'm suprised to see you encouraging this...Emujo

[Stirton.M]

truth be told, the guy did state what machine he had from the get go here.

In the other case, I was a bit pissed off because of the runaround that that other guy did because he did not qualify from the get go, what his problem was.