Dell 2355DN Service Manual - Page 85

Alignment and Troubleshooting Vertical White Line (Band) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer White line NO missing definitely? YES Check if the printout is still has the NO same problem even right after passed through the transfer roller YES The ribs in fuser or toner on the roller may invoke the image problem -> Replace the fuser cover or the defective part The image is originally black or the black part is far close to the top -> Use the pattern which has the image below bigger than 10mm from the top Dirt of dust stuck onto the window of internal lens of LSU -> Clean it or replace LSU Preventive obstacles through the path between OPC of toner cartridge and LSU prevent the path -> Remove the obstacles Toner material might be stuck to blade in the developer inside and it prevents toner supply -> Replace the toner cartridge Check both if the toner cartridge's counter is over its guaranty and amount of the toner material -> Replace the toner cartridge 4-45 Service Manual