I'm getting a little perplexed by this one, so I'm hoping one of you fine folks has seen this issue before:
SKMBT_C36012042922430.jpg
Basically, I have a Bizhub C650 (about 1.2 million clicks) with all yellow print out-of-registration. Part of the page is spot-on, the rest of the page gets increasingly further and further out of registration. As you can see from the registration pattern, the yellow is shifted differently across the page. Because of the varying amounts of registration-difference, skew adjustments and color-reg. adjustments are futile. This defect happens on all copies and prints, out of all trays, using all paper sizes, including on internal patterns. Constant P-21 codes, of course.
To make matters more complex, the machine is located on a ship that only comes into port once every 7-10 days. And, on top of that, technicians in other cities are occasionally servicing the machine without noting what service was performed. What I do know, because I have done it myself:
I have also tried lots of other crazy things, like putting shims on the yellow imaging unit to raise one side while installed in the machine. Updated all F/W, per the "p-21" tech bulletin. No difference. Before it is asked: yes, I did follow the setup procedures for the printhead (entering LD and skew values, lead/side edge adjust, skew adj. reset, etc.). Have also attempted all the steps in the "p-21" tech bulletin (entering low values for all skews, doing a whole bunch of init-stabs and skew adj. resets, updating f/w, all that).
....and YES, Paul, I do have a manual.
SKMBT_C36012042922430.jpg
Basically, I have a Bizhub C650 (about 1.2 million clicks) with all yellow print out-of-registration. Part of the page is spot-on, the rest of the page gets increasingly further and further out of registration. As you can see from the registration pattern, the yellow is shifted differently across the page. Because of the varying amounts of registration-difference, skew adjustments and color-reg. adjustments are futile. This defect happens on all copies and prints, out of all trays, using all paper sizes, including on internal patterns. Constant P-21 codes, of course.
To make matters more complex, the machine is located on a ship that only comes into port once every 7-10 days. And, on top of that, technicians in other cities are occasionally servicing the machine without noting what service was performed. What I do know, because I have done it myself:
- Tried (3) different yellow imaging units
- Tried (2) different X'fer Belts
- Cleaned all lasers (repeatedly)
- Cleaned belt IDC sensors (repeatedly)
- Replaced print head (x2, apparently techs in another city tried this again)
- Replaced PWB-MFP
- Replaced both Memory sticks
I have also tried lots of other crazy things, like putting shims on the yellow imaging unit to raise one side while installed in the machine. Updated all F/W, per the "p-21" tech bulletin. No difference. Before it is asked: yes, I did follow the setup procedures for the printhead (entering LD and skew values, lead/side edge adjust, skew adj. reset, etc.). Have also attempted all the steps in the "p-21" tech bulletin (entering low values for all skews, doing a whole bunch of init-stabs and skew adj. resets, updating f/w, all that).
....and YES, Paul, I do have a manual.
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