Oki Data CONFIDENTIAL44871001TH Rev.6 8-658. TROUBLESHOOTING PROCEDURES8.5.6 Print TroubleshootingThe troubleshooting procedure of abnormal printing is described as follows. The typicalabnormal printing is shown in the following Figure 7-1.Trouble Flowchart numberPale 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 extractedInefficient fusing (when touching the printed sheet, printedcharacters or image is faded or come off.)Vertical white belt/ White line (Fig. 7-1 )Pale printing orthe whole printingis fadedThe whitesection is dirtyVertical blackbelt/ Black linePeriodic failure Vertical whitebelt/ White lineWhite paperFigure 7-1Pale 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 specified paper used.• No Use specified 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 mainboard and the PC connector of the LED head areappropriately connected.)• No Install the LED head appropriately.• Yes Does the contact plate of the transfer roller contact the TR terminal ofthe high-voltage power supply unit properly? (See Figure 7-3 , Section9.2 (2))• No Adjust the contact plate of the transfer roller so that it contactsthe TR terminal of the high-voltage power supply unit and thetransfer roller shaft well.• Yes Are the contact of the developing roller and toner supply roller ofthe image drum cartridge appropriately connected to the contactassembly? (See Figure 7-2 and )• No Adjust so that the contacts of the developing roller and tonersupply 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 cablePC connectorMain boardLED head
