Brother MFC-7390

ii
Confidential
4.2.2 No paper feeding from MP tray ............................................................................ 2-74
4.2.3 No paper feeding from manual feed slot .............................................................. 2-75
4.2.4 Multiple sheets of paper are fed ........................................................................... 2-75
4.2.5 Paper becomes wrinkled ...................................................................................... 2-76
4.2.6 Paper is fed at an angle ....................................................................................... 2-76
4.2.7 Paper curls ........................................................................................................... 2-77
4.2.8 Unable to perform 2-sided printing ....................................................................... 2-77
4.2.9 Paper jam ............................................................................................................. 2-78
4.3 Troubleshooting for Image Defects ................................................................................... 2-83
4.3.1 Image defect examples ........................................................................................ 2-83
4.3.2 Troubleshooting image defect .............................................................................. 2-84
4.4 Troubleshooting for Software Problems ........................................................................... 2-98
4.4.1 Unable to receive data ......................................................................................... 2-98
4.5 Troubleshooting for Network Problems ............................................................................ 2-99
4.5.1 Cannot make a print through network connection ................................................ 2-99
4.5.2 Cannot connect to access point ........................................................................... 2-99
4.6 Troubleshooting for Control Panel Problems .................................................................. 2-100
4.6.1 Nothing is displayed on the LCD ........................................................................ 2-100
4.6.2 Nothing is displayed on the LED ........................................................................ 2-100
4.6.3 Unable to perform panel operation ..................................................................... 2-100
4.7 Troubleshooting for Toner Cartridge and Drum Unit Problems ...................................... 2-101
4.7.1 New toner not detected ...................................................................................... 2-101
4.7.2 Toner cartridge not detected .............................................................................. 2-101
4.7.3 Toner replacement message displayed on LCD is not cleared .......................... 2-102
4.7.4 Drum error .......................................................................................................... 2-102
4.7.5 Drum replacement message displayed on LCD is not cleared .......................... 2-102
4.8 Troubleshooting for Fuser Unit Problems ....................................................................... 2-103
4.8.1 Fuser unit failure ................................................................................................. 2-103
4.9 Troubleshooting for Laser Unit Problems ....................................................................... 2-103
4.9.1 Laser unit failure ................................................................................................. 2-103
4.10 Troubleshooting for PCB Problems ................................................................................ 2-104
4.10.1 Main PCB failure ................................................................................................ 2-104
4.10.2 Full memory ........................................................................................................ 2-104
4.11 Troubleshooting for Document Feeding Problems ......................................................... 2-105
4.11.1 No document is fed ............................................................................................ 2-105
4.11.2 Multiple documents are fed ................................................................................ 2-105
4.11.3 Document jam .................................................................................................... 2-106
4.11.4 Document becomes wrinkled ............................................................................. 2-107
4.11.5 Document size is not detected correctly ............................................................. 2-107
4.12 Troubleshooting for Scanning Image Defect .................................................................. 2-108
4.12.1 Defect examples ................................................................................................. 2-108
4.12.2 Troubleshooting according to image defect ....................................................... 2-108
4.13 Troubleshooting for FAX/Phone Problems ..................................................................... 2-113
4.13.1 Fax cannot be sent ............................................................................................. 2-113
4.13.2 Fax cannot be received ...................................................................................... 2-114