Originally Posted by
raplma
Thanks for replying and good point, more detail...
Having moved the machine, I ran a simple B/W job, and discovered that the black IU had failed and dumped onto the Printhead as they do. So removed all IU's cleaned out the Printhead area of toner/dev and cleaned the Printhead laser apertures. Installed new black IU. Ran the image stabilization. Ran B/W job looked ok.
Ran colour job and discovered issue.
Agitated all toners, and swapped yellow and Cyan IU's with items known to be working when removed from another machine, but not new items. (I do have new ones if considered worth while) entered gradation adj menu, ran stabilizer and then found the three further operations - gradation, resolution and high compression - although available were not operational i.e. the start button remaining orange upon selection - yes there was paper in all the the trays A3 being the largest in bypass and tray 1 and correctly set.
In test mode, printed out the various image tests, any of the layouts that use solids are fine - halftone on 255 density, Lattice pattern on 255 density etc. - print out fine, it's when there is a gradation of yellow or cyan that they are not. So in the color sample again any patches that use gradations of yellow and cyan were either missing or incorrect.
Good suggestion on the stop test, will try that in the morning.
I also have a spare printhead which I did toy with swapping over, subject to the suggestions on here.
Dumb question if I may, when you use the terms LSU's what are you referring to, want to make sure I have it correct.
Thanks again
Mark
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