7506AC copy quality

[tnrtt]

Re: 7506AC copy quality

You might try blowing out the drum potential sensor(s), then re-calibrate. No, never with canned air! Please don't freeze the drum potential sensor! Only blower brush or your own breath.
Also check that the patch sensor shutter is opening, and the patch sensors are clean. =^..^=

Changed entire patch assy. Ran a 4719, so I assume the shutter was opening. It was all the colors, not just the black, which eliminates the only drum potential sensor. I'll stop and get some samples.

[Thayer]

Re: 7506AC copy quality

Did someone turn off auto adjustment, so it will calibrate every few prints? How do the charge grid look?

[blackcat4866]

Re: 7506AC copy quality

You might try blowing out the drum potential sensor(s), then re-calibrate. No, never with canned air! Please don't freeze the drum potential sensor! Only blower brush or your own breath.
Also check that the patch sensor shutter is opening, and the patch sensors are clean. =^..^=

[tnrtt]

7506 with 300k. Won't maintain copy density. Run quality control and gamma adjustment, prints look good. Throughout a run, print print density starts to fade. Re calibrate and looks good again for a while. Replaced quality sensor, no difference