Technical data

7.13 Fusing Failure
Pressure roller tension arms and springs might be damaged or not
working.
7.14 Black Lines or Streaks
Description: Black lines or streaks running horizontally or
vertically in the white areas of the sheet.
Troubleshooting: Print several copies of the light dusting test
pattern, as shown in Section 3.3. The light dusting test print should
be completely white. Classify the streaks as horizontal or vertical
running and go to one of the following procedures:
Procedure for vertical lines or streaks:
a. Remove and inspect the print cartridge. Look for
obstructions in the laser beam path. For example: paper,
lint, or dust.
Swap the print cartridge.
Make sure the scanner window is not contaminated or
blocked.
Make sure the scanner assembly is correctly mounted.
Swap the scanner assembly.
b. Remove the developer unit and inspect the developer roller.
Turn the developer roller clockwise to check for sticking,
binding, or toner build up at the ends of the developer roller.
c. Swap the developer cartridge.
d. Make sure a fuser cleaning pad is installed.
e. Remove and inspect the fuser cleaning pad. Replace it if
damaged or contaminated.
f. Inspect and clean the fuser stripper fingers.
Procedure for horizontal streaks:
The distance between horizontal lines indicates which roller
caused the defect. Measure the distance and see if it compares
to the distances below. Inspect the indicated rollers or inspect all
paper path rollers for damage or contamination.
7–18 Image Defects FIPs