Brother HL-L2300D Service Manual page 5

4.3 Troubleshooting for Image Defects ................................................................................... 2-56
4.3.1 Image defect examples ....................................................................................... 2-56
4.3.2 Troubleshooting according to image defect ......................................................... 2-57
4.4 Troubleshooting for Software Problems ........................................................................... 2-68
4.4.1 Cannot receive data ............................................................................................. 2-68
4.5 Troubleshooting for Network Problems ............................................................................ 2-69
4.5.1 Cannot print via network connection .................................................................... 2-69
4.5.2 Cannot connect to access point ........................................................................... 2-69
4.6 Troubleshooting for Control Panel Problems .................................................................... 2-70
4.6.1 Nothing is displayed on the LCD .......................................................................... 2-70
4.6.2 Nothing is displayed on the LED .......................................................................... 2-70
4.6.3 Control panel is inoperable ................................................................................... 2-70
4.7 Troubleshooting for Toner and Drum Problems ............................................................... 2-71
4.7.1 New toner is not detected ..................................................................................... 2-71
4.7.2 Toner cartridge cannot be recognized .................................................................. 2-71
4.7.3 Error message prompting toner cartridge replacement does not disappear ........ 2-72
4.7.4 Drum error ............................................................................................................ 2-72
4.7.5 Error message prompting drum replacement does not disappear ....................... 2-72
4.8 Troubleshooting for Fuser Unit Problems ......................................................................... 2-73
4.8.1 Fuser unit failure ................................................................................................... 2-73
4.9 Troubleshooting for Laser Unit Problems ......................................................................... 2-73
4.9.1 Laser unit failure ................................................................................................... 2-73
4.10 Troubleshooting for PCB Problems .................................................................................. 2-74
4.10.1 Main PCB failure .................................................................................................. 2-74
4.10.2 Memory full ........................................................................................................... 2-74
4.10.3 Print limit / ID authentification error ...................................................................... 2-74
4.11 Troubleshooting for Other Problems ................................................................................. 2-75
4.11.1 Cannot print ......................................................................................................... 2-75
4.11.2 Cannot update firmware ...................................................................................... 2-75
CHAPTER 3 DISASSEMBLY/REASSEMBLY
1. SAFETY PRECAUTIONS ............................................................................................................ 3-1
2. PACKING .................................................................................................................................... 3-2
3. SCREW CATALOGUE ................................................................................................................ 3-3
4. SCREW TORQUE LIST .............................................................................................................. 3-4
5. LUBRICATION ............................................................................................................................ 3-5
6. OVERVIEW OF GEARS .............................................................................................................. 3-6
7. HARNESS ROUTING .................................................................................................................. 3-8
8. DISASSEMBLY FLOW CHART ................................................................................................ 3-13
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