CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS4-223.19 The copy is foggy (horizontal).1) Does the problem occur at the same position on all copies made in Di-rect.YES: Go to step 5.Scanning lamp2) Does the scanning lamp flicker while the scanner is moving forward?YES: Check the scanning lamp and the inverter PCB.Drum unit3) Does the problem occur at intervals of 94 mm?YES: Replace the drum unit.Wiring4) Is the wiring between the scanning lamp, the inverter PCB and thereader assembly?NO: Correct the wiring.Developing assembly5) Is the coating of toner on the developing cylinder normal?NO: Check the developing bias.Scanner, Feeding system6) Make reduced copies (about 50% to 60%), and compare them againstcopies made in Direct. Is the position of the problem different?YES: Check the scanner.NO: Check the feeding assembly.
