Oki 6E - Manual (Page 139)

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4 Black vertical belts or stripes
• Replace the image drum unit.
• Has the problem been removed?
• Yes End
Note: After replacing the image drum unit, set the printer in the user
maintenance mode by turning the power on while pressing the
MENU key, and reset the drum counter (see User’s Manual).
▼
• No Replace the LED head.
• Has the problem been removed.
• Yes End
Note: After replacing the LED head, set the printer in the engine mainte-
nance mode by turning the power on while pressing the FORM FEED
and ENTER keys. Set the LED head drive time if the luminous rating
of the old LED head and the new LED head are different (see 4.2).
▼
• No Replace the Main Control PCB or power supply board.