Brother HL-1112 - Page 4

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Confidential
4.2.14 Faint print ............................................................................................................ 1-25
4.2.15 White spots.......................................................................................................... 1-26
4.2.16 Black spots .......................................................................................................... 1-26
4.2.17 Black band........................................................................................................... 1-27
4.2.18 Downward fogging of solid color ......................................................................... 1-27
4.2.19 Horizontal lines.................................................................................................... 1-27
4.2.20 Ghost................................................................................................................... 1-28
4.2.21 Fogging ............................................................................................................... 1-28
4.3 Troubleshooting for Software Problems ............................................................................ 1-29
4.3.1 Cannot print data................................................................................................. 1-29
4.4 Troubleshooting for Toner and Drum Problems ................................................................ 1-30
4.4.1 Replaced the toner cartridge with a new one
but still seeing LED display prompting toner cartridge replacement. .................. 1-30
4.4.2 Toner cartridge cannot be detected .................................................................... 1-30
4.4.3 Failed to detect toner cartridge............................................................................ 1-30
4.4.4 Drum error ........................................................................................................... 1-31
4.4.5 Drum unit cannot be detected. ............................................................................ 1-31
4.4.6 Replace drum unit (replaced the drum unit with a new one
but still seeing LED display prompting toner cartridge replacement) .................. 1-31
4.5 Troubleshooting for Fuser Unit Problems .......................................................................... 1-32
4.5.1 Fuser unit failure.................................................................................................. 1-32
4.6 Troubleshooting for Laser Unit Problems .......................................................................... 1-32
4.6.1 Laser unit failure.................................................................................................. 1-32
4.7 Troubleshooting for Other Problems.................................................................................. 1-33
4.7.1 Machine does not turn ON or LED does not light................................................ 1-33
4.7.2 Top cover is open................................................................................................ 1-33
4.7.3 Unusual noise is coming from the machine......................................................... 1-33
4.7.4 Memory failure..................................................................................................... 1-34
4.7.5 Print failure .......................................................................................................... 1-34
4.7.6 Paper size failure................................................................................................. 1-34
4.7.7 Main motor failure................................................................................................ 1-34
4.7.8 Power supply voltage failure ............................................................................... 1-34
4.7.9 High voltage power supply PCB failure ............................................................... 1-35
4.7.10 Main PCB failure ................................................................................................. 1-35
CHAPTER 2 DISASSEMBLY/REASSEMBLY
1. PACKING ..................................................................................................................................... 2-1
2. TIGHTENING TORQUE LISTS .................................................................................................... 2-2
3. LUBRICATION ............................................................................................................................. 2-3
4. OVERVIEW OF GEARS............................................................................................................... 2-3
5. HARNESS ROUTING................................................................................................................... 2-4
6. DISASSEMBLY FLOW CHART................................................................................................... 2-7