Image Quality Troubleshooting - Xerox WORKCENTRE 7428 System Administrator Manual

Troubleshooting

Image Quality Troubleshooting

Problem
Repeating white or colored marks /
spots / lines / bands every 94 mm
(approx 3.75 in) or 37 mm (approx
1.5 in)
Repeating Image, Mark or Spot
every 84mm (approx. 3.25 in).
White streak or deletion running
full length of sheet from Lead
edge to trail edge.
Black or Color streaks running full
length of sheet from Lead edge to
trail edge.
Light / uneven density or faint
image.
Black lines or spots on copies when
using document feeder.
Completely blank copies when
document feeder or document
glass is used.
Completely blank output when
printing.
204 WorkCentre 7425/7428/7435
System Administrator Guide
Cause
The drum cartridge has
deteriorated or is damaged.
Media was run in incorrect mode
causing toner offsetting.
Defect or contamination on Fuser
Roll.
Dirt / contamination on printhead.
The drum cartridge has
deteriorated or is damaged.
Media was run in incorrect mode
causing poor image transfer.
Damp paper causing poor image
transfer.
Non-recommended media is being
used.
Document glass or CVT glass are
dirty
Two or more sheets fed together.
Systems error.
Two or more sheets fed together.
Poor connection with printer.
Solution
Replace the drum cartridge that
matches the color of the defect.
Check that the media type
selections match the media type
being used.
Run 10 blank sheets.
Replace the Fuser Assy.
Clean all printheads using
cleaning tool.
Replace the drum cartridge that
matches the color of the streak.
Check that the media type
selections matches the media type
being run.
Load new paper.
Use Xerox recommended media.
Clean document glass & CVT
glass.
Check for multifed sheets in
output.
Fan the paper or load fresh paper.
Power machine Off / On.
Check for multifed sheets in
output.
Fan the paper or load new paper.
Check / reseat data cables.
Power machine Off / On.