I'm a bit stumped on this one. The machine prints out very very light gray banding from top to bottom of LT prints. Does this on prints and copies, black and color. It seems to really stand out when running a blank print or print with very little image, but is barely there or gone with more coverage. The gray banding is thin, about a 1/4 in thick in a random pattern from top to bottom, but thicker than a laser line issue. For clarification, the bands run from the front frame to the rear frame of the machine. I've cleaned the optics to be safe. I've also removed the laser unit and carefully cleaned the polygon mirrors and all other lsu mirrors. I've ran a drum refresh and dv refresh. Power checks out good.
I've replaced the following or switched with known working units.
Primary Transfer Belt Unit
K DV Unit
K Drum Unit
Fuser was replaced awhile back due to noise.
This machine has had very little use or the 5 years in their office. Count is about 50K black and 35K color. Due to the little use, it has all other original PM supplies.
I'm not sure of my next step besides trying to update firmware with the CF. Any ideas?
I've replaced the following or switched with known working units.
Primary Transfer Belt Unit
K DV Unit
K Drum Unit
Fuser was replaced awhile back due to noise.
This machine has had very little use or the 5 years in their office. Count is about 50K black and 35K color. Due to the little use, it has all other original PM supplies.
I'm not sure of my next step besides trying to update firmware with the CF. Any ideas?