Brother HL-L5000D Service Manual page 5

4.3.2 Troubleshooting according to image defect ........................................................ 2-99
4.4 Troubleshooting for Software Problems ........................................................................ 2-111
4.4.1 Cannot receive data .......................................................................................... 2-111
4.5 Troubleshooting for Network Problems ......................................................................... 2-112
4.5.1 Cannot print via network connection ................................................................. 2-112
4.5.2 Cannot connect to access point ........................................................................ 2-112
4.6 Troubleshooting for Control Panel Problems ................................................................ 2-112
4.6.1 Nothing is displayed on the LCD ....................................................................... 2-112
4.6.2 Nothing is displayed on the LED ....................................................................... 2-113
4.6.3 Control panel is inoperable ............................................................................... 2-113
4.7 Troubleshooting for Toner and Drum Problems ............................................................ 2-114
4.7.1 New toner is not detected ................................................................................. 2-114
4.7.2 Toner cartridge cannot be recognized .............................................................. 2-114
4.7.3 Error message prompting toner cartridge replacement does not disappear ..... 2-114
4.7.4 Drum error ......................................................................................................... 2-115
4.7.5 Error message prompting drum replacement does not disappear .................... 2-115
4.8 Troubleshooting for Fuser Unit Problems ..................................................................... 2-116
4.8.1 Fuser unit failure ............................................................................................... 2-116
4.9 Troubleshooting for Laser Unit Problems ...................................................................... 2-116
4.9.1 Laser unit failure ............................................................................................... 2-116
4.10 Troubleshooting for PCB Problems ............................................................................... 2-117
4.10.1 Main PCB failure ............................................................................................... 2-117
4.10.2 Memory full ....................................................................................................... 2-117
4.11 Troubleshooting for Other Problems ............................................................................. 2-118
4.11.1 Cannot print ...................................................................................................... 2-118
4.11.2 Cannot update firmware .................................................................................... 2-118
4.11.3 USB direct interface errors ................................................................................ 2-118
4.11.4 "Paper Low" message does not disappear ....................................................... 2-119
CHAPTER 3 DISASSEMBLY/REASSEMBLY
1. SAFETY PRECAUTIONS ............................................................................................................ 3-1
2. PACKING .................................................................................................................................... 3-2
3. SCREW CATALOGUE ................................................................................................................ 3-5
4. SCREW TORQUE LIST .............................................................................................................. 3-6
5. LUBRICATION .......................................................................................................................... 3-12
6. OVERVIEW OF GEARS ............................................................................................................ 3-14
7. HARNESS ROUTING ................................................................................................................ 3-17
8. DISASSEMBLY FLOW CHART ................................................................................................ 3-33
8.1 Machine ........................................................................................................................... 3-33
8.2 LT .................................................................................................................................... 3-35
8.3 MX ................................................................................................................................... 3-36
8.4 TT .................................................................................................................................... 3-37
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