[CQ] Strange Blocks on Prints

[BreesBacker]

I am having these strange blocks on print jobs show up on most but not all prints. Some are black some are cyan in color. This is a Oce cm2520 the same as a BisHub c250. We have tried replacing the main PWB-MFP, PWB-M and Firmware. One month before this problem showed up we had to replace the NVRAM because of corruption. Thanks in advance.S25C-112102511090_0001.jpgS25C-112102511090_0002.jpg

[907tec]

Re: Strange Blocks on Prints

Does this happen on internal prints, as well? It is usually best to make internal test prints from each individual imaging unit first, to determine whether the problem is in the read or the write section. Print out some gradation test patterns
(C-->M-->Y-->K) and figure out which imaging units exhibit the defect. If the problem only occurs on one color, you can narrow your search down to that area. If it is occurring on all imaging unit gradations, I would perform a stop-test to see if the defect appears on the belt and/or each drum. I have never seen this particular defect, so a little more info will be helpful.

[JustManuals]

Re: Strange Blocks on Prints

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[mo0651]

Re: Strange Blocks on Prints

did you look at transfer belt? Looks like something stuck on it.

[BreesBacker]

Re: Strange Blocks on Prints

did you look at transfer belt? Looks like something stuck on it.

We have replaced the Transfer belt and fuser. But as you can see the blocks change size and shape. Also they are sometimes cyan, megenta or black in color.