December 2005 © TOSHIBA TEC e-STUDIO163/203 TROUBLESHOOTING5 - 2759) White banding (in the feeding direction)Fig. 5-9Defective area Step Check items PrescriptionLaser optical unit 1 Is there a foreign matter or stain onthe slit glass?Remove the foreign matter or stain.Main charger grid 2 Is there a foreign matter or dew onthe charger grid?Remove the foreign matter.Transfer charger wire 3 Is there any foreign matter or stain onthe transfer charger wire?Clean the transfer charger wire.Developer unit 4 Is the developer material transportedproperly?Remove the foreign matter if there isany.5 Is there a foreign matter or dew onthe drum seal?Remove the foreign matter or dew.6 Is the upper drum seal of the devel-oper unit in contact with the drum?Correct the position of the drum sealor replace it.Drum 7 Is there a foreign matter on the drumsurface?Replace the drum.Transport path 8 Does the toner image contact withany foreign matter before the paperenters the fusing section after theseparation?Remove the foreign matter.Discharge LED 9 Is any of the discharge LEDS off? Replace the discharge LED.Scanner 10 Is there a foreign matter on the lightpath?Remove the foreign matter.11 Are the original glass (especially theposition of shading correction plate)mirror and lens dirty?Clean them.Cleaner 12 Is there any foreign matter, whichcontacts the drum on the cleanerstay?Remove the foreign matter.Feeding direction
