4.7 Troubleshooting for Toner and Drum Problems................................................... 2-88
4.7.1 New toner is not detected......................................................................... 2-88
4.7.3 Drum error ................................................................................................ 2-88
4.8.1 Fuser unit failure....................................................................................... 2-89
4.9.1 Laser unit failure....................................................................................... 2-90
4.10.1 Main PCB failure ...................................................................................... 2-91
4.10.2 High-voltage power supply PCB failure.................................................... 2-91
4.10.3 Low-voltage power supply PCB failure..................................................... 2-91
4.11.1 Multiple sheets of document are fed ........................................................ 2-92
4.11.3 Document size is not detected correctly................................................... 2-92
4.12 Troubleshooting for Image Defects...................................................................... 2-93
4.12.1 Defect examples....................................................................................... 2-93
4.14.1 Machine is not turned ON......................................................................... 2-97
4.14.2 Main fan does not rotate........................................................................... 2-97
4.14.3 Main motor failure..................................................................................... 2-97
4.14.4 Unusual noise is generated from the machine ......................................... 2-97
4.14.5 Malfunction of the memory ....................................................................... 2-97
Confidential