Brother HL-5440D User Manual
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LEDs (Light Emitting Diodes) ............................................................................................................71
Service call indications ......................................................................................................................79
Control panel keys.............................................................................................................................81
Lower tray (LT-5400) ...............................................................................................................................89
SO-DIMM (HL-5450DN only)...................................................................................................................90
SO-DIMM types .................................................................................................................................90
Installing extra memory .....................................................................................................................91
Replacing the toner cartridge ............................................................................................................94
Replacing the drum unit...................................................................................................................102
Cleaning the outside of the machine ...............................................................................................109
Cleaning the corona wire.................................................................................................................111
Cleaning the drum unit ....................................................................................................................113
Cleaning the paper pick-up roller.....................................................................................................118
Identifying your problem ........................................................................................................................122
Error messages in the Status Monitor ...................................................................................................123
If you are having difficulty with your machine ........................................................................................137
Improving the print quality......................................................................................................................141
Machine Information ..............................................................................................................................148