Yellow and magenta horizontal lines

[KMtech69]

Hi all
I'm working on a WC Pro 32 that is getting yellow and magenta lines across the page that are about a 1/4 inch wide about 3 inches apart. Sometimes the machine will just do a yellow line but most of the times it is both of them side by side.

Thank you in advanced

[adriansto]

Re: Yellow and magenta horizontal lines

Go to WCPS diagnostic and print some internal test pages to see if this happen when to print colour only or black and white. Post a sample of defect here.

[KMtech69]

Re: Yellow and magenta horizontal lines

I normally work on konica minolta copiers I'm not sure how to enter that mode and print out test pages.

[adriansto]

Re: Yellow and magenta horizontal lines

This machine dont have builtin diagnostics.
The diagnostic software is named WCPS and it run on a PC computer

[KMtech69]

Re: Yellow and magenta horizontal lines

Here are a couple examples of the problem.S35C-114102114300.pdfS35C-114102114301.pdf

[Flash]

Re: Yellow and magenta horizontal lines

Replace the yellow and magenta drums or you can switch yellow and magenta with black and cyan and see if your streaks move with it.

[KMtech69]

Re: Yellow and magenta horizontal lines

I switched out the magenta and yellow drums and the problem stayed the same with the yellow and magenta lines going across the page. On the pdf files the lead edge is on top.

[Exok]

Re: Yellow and magenta horizontal lines

Do you see how the lines do not extend to the very edge of the paper? This indicated the lines are probably being generated by the IIT because none of the unwanted image shows up in the erase boarder. Does the image quality differ when copies are made on the glass vs through the document feeder? How does the image look when made in black & white mode? Can you send print jobs to the machine (to bypass the scanner) to see if you still get the lines? What about internal reports such as a config sheet? Do the lines only show up on print jobs and not copy jobs? If so have you tried different print drivers?

Possible cause: Dirty optics, faulty CCD assembly, faulty image processor, ROS, software, driver.

You'll have to do a bit more digging to narrow it down but due to the fact that the image does not extend into the erase margins, i think we can eliminate the drums, developer units, transfer and fusing.

[KMtech69]

Re: Yellow and magenta horizontal lines

The lines do go from edge to edge. When I scanned it the edge erase on my scanner. The pdf's are copied from the glass.

[adriansto]

Re: Yellow and magenta horizontal lines

If you use only print the defect appear ?

[KMtech69]

Re: Yellow and magenta horizontal lines

The customer only uses this machine for a copier.

[adriansto]

Re: Yellow and magenta horizontal lines

Is not that the problem. Because you dont have access at the diagnostic mode you must find a way to determine if the error came from scanner part of the machine or from printer part of the machine.
If you use a machine at a printer only you will see if this part is ok or not.

[KMtech69]

Re: Yellow and magenta horizontal lines

I went back out to the customers office and ran a calibration and the print out had the lines still on it.

[adriansto]

Re: Yellow and magenta horizontal lines

You mean the page that is printed for use it on the machine scanner for calibration.
You can try to cover the magenta or yellow ROS window to eliminate the laser malfunction.
But I think the problem is High Voltages Power Supply for drum modules or poor contact on drum module charge contacts