Dell 2355DN Service Manual - Page 82

Alignment and Troubleshooting No Image Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer No image? NO YES Self test NO pattern prints? YES Check connection to computer or replace controller A on next page Self testing NO is possible ? YES Take out the cartridge and prepare the tester for electronic connection Retest after replacing the connector or controller board Is the OPC terminal of machine NO is well-connected to Frame? YES Repair or replace the GND terminal Does the video data line to NO LSU transit to High/Low when printing? YES Check the path between Main board and HVPS. Repair or replace the defective component or board The mirror in LSU might be misplaced so the light path to the OPC deviates ->Repair or replace LSU or remove any defective matters in the machine 4-42 Service Manual