Oki MB461 - Print Troubleshooting

Oki Data CONFIDENTIAL
44871001TH Rev.6
8-65
8. TROUBLESHOOTING PROCEDURES
8.5.6 Print Troubleshooting
The troubleshooting procedure of abnormal printing is described as follows. The typical
abnormal printing is shown in the following Figure 7-1.
Trouble Flowchart number
Pale printing or the whole printing is faded. (Fig.7-1 )
The white section is dirty. (Fig.7-1 )
White paper is outputted (Fig. 7-1 )
Vertical black belt/ Black line (Fig. 7-1 )
Periodic failure (Fig. 7-1 )
A part of printing is extracted
Inefficient fusing (when touching the printed sheet, printed
characters or image is faded or come off.)
Vertical white belt/ White line (Fig. 7-1 )
Pale printing or
the whole printing
is faded
The white
section is dirty
Vertical black
belt/ Black line
Periodic failure Vertical white
belt/ White line
White paper
Figure 7-1
Pale printing or the whole printing is faded.
• Doestheprinterlacktoner?(IsthemessageofTonerLowdisplayed?)
• Yes Supplythetoner.
• No Isspeciedpaperused.
• No Usespeciedpaper.
• Yes IsthelensoftheLEDheaddirty?
• Yes Cleanthelens.
• No IstheLEDheadappropriatelyinstalled?
(Check that the HEAD connector of the main
board and the PC connector of the LED head are
appropriately connected.)
• No InstalltheLEDheadappropriately.
• Yes DoesthecontactplateofthetransferrollercontacttheTRterminalof
the high-voltage power supply unit properly? (See Figure 7-3 , Section
9.2 (2))
• No Adjustthecontactplateofthetransferrollersothatitcontacts
the TR terminal of the high-voltage power supply unit and the
transfer roller shaft well.
• Yes Are the contact of the developing roller and toner supply roller of
the image drum cartridge appropriately connected to the contact
assembly? (See Figure 7-2
and )
• No Adjust so that the contacts of the developing roller and toner
supply roller are connected to the contact assembly.
• Yes Replacethetransferroller.
• Hasthetroublebeensolved?
• Yes Completed
• No Replacetheimagedrumcartridge.
• Hasthetroublebeensolved?
• Yes Completed
• No Isthesurfaceelasticityoftheback-uprollernormal?
• No ReplacethefuserAssy.
• Yes Replacethemainboardorhigh-voltagepowersupplyunit.
LED head cable
PC connector
Main board
LED head