Printronix L1024, Maintenance Manual

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13–22 Chapter 13 – Troubleshooting Guide
c. Check the developer bias and replace the H.V.P.S. if needed.
580. The print is intermittently dark, then goes light over a period of 1 to three pages.
This may be accompanied by 1.5 inch repeating errors.
581. The inner transfer gear is spinning on the main shaft, resulting in the developer sleeve
not turning and not being replenished with toner. The developer sleeve will be grayish in
color instead of being black.
a. Replace the inner transfer gear.
590. The print appears to be smudged as if something has rubbed the toner before it was
fused.
591. The inner transfer gear is slipping, causing the developer gear to turn slower. This causes
the OPC drum and developer sleeve to no longer be synchronized. The toner thus drags
across the surface of the OPC drum.
a. Replace the inner transfer gear in the developer gear assembly.
600. Other Image Errors
610. Vertically blurred image.
The image appears to be smudged in an area of the page and the smudge runs the
entire length of the page.
611. The unfused toner on the paper is being blurred.
a. The toner is being smeared by something in the paper path between the transfer
charger and the fuser. The obstruction is usually a piece of paper in the entrance to
the fuser.
b. The paper is skewing as it enters the printer. This causes the paper to buckle. Make
sure the paper is being fed correctly into the printer.
612. The transfer charger static brush is damaged and is not touching the paper at some
point.
a. Replace the static brush.
613. There is a foreign object that is distorting the laser beam.
a. Inspect the LSU cover glass for any obstructions or defects. Clean or replace the cover
glass as needed.
b. There is a foreign object distorting the beam inside the LSU. Replace the LSU.
620. Vertically compressed image.
The image is compressed or smaller than it should be. It runs the entire width of the page. This
is most noticeable in lines of text where one or more lines are compressed.
621. The paper is not feeding at the proper speed through the printer. It is occasionally moving
too slowly. (If it were always moving too slowly, a paper jam error would occur.)