ii
Confidential
3.2 Error Messages ................................................................................................................. 2-24
3.3 Communication Errors ....................................................................................................... 2-28
4. TROUBLESHOOTING ............................................................................................................... 2-31
4.1 Error Cause and Remedy.................................................................................................. 2-31
4.2 Troubleshooting for Paper Feeding Problems ................................................................... 2-69
4.2.1 Multiple sheets of paper are fed .......................................................................... 2-69
4.2.2 Paper becomes wrinkled ..................................................................................... 2-69
4.2.3 Paper is fed at an angle ...................................................................................... 2-69
4.2.4 Paper is curled .................................................................................................... 2-70
4.2.5 Only single surface is printed in duplex printing mode ........................................ 2-70
4.3 Troubleshooting for Image Defects.................................................................................... 2-71
4.3.1 Image defect examples ....................................................................................... 2-71
4.3.2 Troubleshooting according to image defect ........................................................ 2-72
4.4 Troubleshooting for Software Problems ............................................................................ 2-85
4.4.1 Cannot print data................................................................................................. 2-85
4.5 Troubleshooting for Network Problems ............................................................................. 2-86
4.5.1 Cannot print via network connection ................................................................... 2-86
4.6 Troubleshooting for Control Panel Problems..................................................................... 2-87
4.6.1 Nothing is displayed on the LCD ......................................................................... 2-87
4.6.2 Control panel is inoperable.................................................................................. 2-87
4.7 Troubleshooting for Toner and Drum Problems ................................................................ 2-88
4.7.1 New toner is not detected.................................................................................... 2-88
4.7.2 Cartridge error (toner cartridge cannot be detected)........................................... 2-88
4.7.3 Drum error ........................................................................................................... 2-88
4.8 Troubleshooting for Fuser Unit Problems .......................................................................... 2-89
4.8.1 Fuser unit failure.................................................................................................. 2-89
4.9 Troubleshooting for Laser Unit Problems .......................................................................... 2-90
4.9.1 Laser unit failure.................................................................................................. 2-90
4.10 Troubleshooting for PCB Problems ................................................................................... 2-91
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 Troubleshooting for Document Feeding Problems ............................................................ 2-92
4.11.1 Multiple sheets of document are fed ................................................................... 2-92
4.11.2 Document becomes wrinkled .............................................................................. 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
4.12.2 Troubleshooting according to image defect ........................................................ 2-93
4.13 Troubleshooting for Fax Problems..................................................................................... 2-96
4.13.1 Fax cannot be sent.............................................................................................. 2-96
4.13.2 Fax cannot be received ....................................................................................... 2-96
4.13.3 Bell does not sound............................................................................................. 2-96
4.13.4 Communication error occurs ............................................................................... 2-96
4.14 Troubleshooting for Other Problems.................................................................................. 2-97
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