Sharp MX-2610N - Image Void Issue

[HikingAK]

Hello everyone! My first post and I have an issue that is stumping me. Looking at a MX-2610N with image void issues in B&W, not color, after over 100 pages have run through. Reproducing the issue had been an issue on the customer site but since we brought it back to the shop we've put a lot of pages on the machine just to reproduce the voids. Once we finally reproduced the voids, we sent an all black print job (from Word) and the attached file is what we received. Basically, it's a black print with what appears to be a white electrical mark (lightning bolt) across the page. It happens consistently (6 of 10 pages) after we have run enough pages through. These are only happening when we print or copy in B&W. No issue when we try it in color.

We've exchanged the following parts from an MX-3110N but we still have the issue in the 2610 with no issues after 300 pages in the 3110:
LSU
LSU Mother PWB
Black Drum
Black Developer
Updated Firmware

Any ideas? Thanks for your help!

[techwurk]

Re: Sharp MX-2610N - Image Void Issue

Did you replace the charger, sawtooth unit in the blk drum unit?

[TechnicianWilson]

Re: Sharp MX-2610N - Image Void Issue

Inspect the Main Charge unit, check that the cover is not contacting the grid or the MC is not contacting the lens.
Try replacing the black Main Charge unit.

[Cookr]

Re: Sharp MX-2610N - Image Void Issue

Second these guys definitely looks something charge related

[mansart]

Re: Sharp MX-2610N - Image Void Issue

swap the black and magenta drum units to see if the defect follow the drum unit. My gut feeling is that it won't follow the drum unit.

I'm not a betting man, but if I were I would bet on a horse called "Primary Transfer Unit"

[HikingAK]

Re: Sharp MX-2610N - Image Void Issue

Thanks everyone for your help. In the end, it was the primary transfer unit. We rebuilt it on site, so I hadn't pulled the transfer unit from the MX-3110N that I'd been swapping parts with. (The rebuild kit did not include rollers.) After swapping the primary, the images look great now. Thanks again for your help!