Technical Bulletin PAGE: 26/75
Reissued:21-Apr-14
Line No.2: White lines caused by dust shield glass
Cause
Light exposed to the drum is insufficient due to an unclean dust shield glass.
Procedure
1. Clean the dust shield glass.
Line No.3: Color lines caused by corona charger
Cause
Charge level is insufficient due to an unclean corona charger.
Procedure
1. Press the “User tools” button on the Panel, select “Maintenance” and do “Color
Registration.” (Note that “User tools” is not indicated on the panel for EU machines. Look for the
mark on the button shown below.)
2. To identify the color causing the lines, print 3 sheets of the halftone pattern (SP2-106-
002-16) in each color.
3. Swap the corona charger of the affected color with another charger of a different color.
4. Again, print 3 sheets of the halftone pattern (SP2-106-002-16) in each color.
Do the vertical lines appear in a different color after swapping the charger?
YES: Replace the charger of the affected color confirmed in step 2 with a new
charger to complete the procedure.
NO: Do the troubleshooting procedures for “Line No.4.”
IMPORTANT: Make sure to put the corona chargers back to their original stations to
prevent PM counter error.
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