DEC DEClaser 5100, Service Manual

Page: 131 / 274

8.7 Vertical Black Lines
8.7 Vertical Black Lines
Do the following if the test print exhibits well defined black lines
that run from leading to trailing edge of the sheet. If the artifact is
blotchy or smudged, go to Section 8.8. This malfunction is typically
caused by mechanical failure of the EP-ED cartridge or the fusing
unit.
1. Print a test sheet.
2. Interrupt the test print by powering off the printer.
3. Open the top door. Remove the half-printed sheet.
4. Remove the EP-ED cartridge.
5. Open the drum shutter (10 seconds maximum), and examine the
image on the drum.
• If the offending band appears on the print drum, replace the
EP-ED cartridge.
• If the pattern on the drum is all right, swap the fusing unit.
8.8 Black Smudged Vertical Bands
Replace the EP-ED cartridge when the test print has black,
smudged, and smeared bands running vertically from the leading
to trailing edges of the sheet. If the lines are clearly defined, go to
Section 8.7.
8.9 Black Smudged Horizontal Bands
Print several test sheets and line up the sheets from trailing to
leading edge.
Replace the EP-ED cartridge if the bands appear at regular
intervals. Replace the fusing unit if the bands appear at irregular
intervals.
FIPs For Fixing Image Defects 8–7