Oki B431L6

6. Procedures for Repairing
Oki Data CONFIDENTIAL
44983601TH Rev.1
6-19 /
LED head cable
PC connector
Main board
LED head
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6-4,Section7.2(3))
• 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6-3
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.