Technical Bulletin PAGE: 23/75
Reissued:21-Apr-14
4. Vertical streaks
Excerpt from RTB RM077031b
Troubleshooting procedures for the following 5 types of Vertical Lines (white and color):
No1. White lines caused by ITB
No2. White lines caused by Dust Shield Glass
No3. Color lines caused by Corona Charger
No4. Color lines caused by Drum Cleaning Unit or OPC Drum
No5. White lines caused by Development Unit ; Clogged doctor gap
Overview of the workflow:
1. Do the lines appear at the same location for all 4 colors?
YES: Do troubleshooting procedure for “Lines No.1.”
NO: Go to the next step.
2. Clean the dust shield glass and check the results with the customer job.
Are the results accepted by the customer?
YES: Finish (See “Lines No2”.)
NO: Go to the next step
3. Press “User tools” on the operation panel, select “Maintenance” and execute “Color
Registration.” (Note that “User tools” is not indicated on the panel for EU machines. Look for the
mark on the button shown below.)
Are the results accepted by the customer or better than before?
YES: See troubleshooting procedures for “Lines No3.”
NO: Go to the next step.
4. To identify the color causing the lines, print 3 sheets of the halftone pattern (SP2-106-
002-16) in each color.
5. Do “No.203 Execute Photoconductor Refreshing” in the Adjustment Settings for Skilled
Operators Menu for the affected color and check the results with the customer job.
Are the results accepted by the customer?
YES: Finish (See “Lines No4”.)
NO: Go to the next step.
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