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3 General Information 71
Control panel ...........................................................................................................................................71
LEDs (Light Emitting Diodes) ............................................................................................................71
Service call indications ......................................................................................................................79
Control panel keys.............................................................................................................................81
Print a test page ......................................................................................................................................82
Using the Go key...............................................................................................................................82
Using the printer driver......................................................................................................................82
Print a Printer Settings page....................................................................................................................83
Using the Go key...............................................................................................................................83
Using the printer driver......................................................................................................................83
Print Fonts ...............................................................................................................................................84
Using the Go key...............................................................................................................................84
Using the printer driver......................................................................................................................84
Security features......................................................................................................................................85
Secure Function Lock 2.0 (HL-5450DN(T) only) ...............................................................................85
Ecology features......................................................................................................................................86
Toner Save........................................................................................................................................86
Sleep Time ........................................................................................................................................86
Deep Sleep mode..............................................................................................................................86
Power Down mode............................................................................................................................87
Quiet mode feature..................................................................................................................................88
Turning Quiet mode on/off.................................................................................................................88
4Options 89
Lower tray (LT-5400) ...............................................................................................................................90
SO-DIMM (HL-5450DN(T) only)..............................................................................................................91
SO-DIMM types.................................................................................................................................91
Installing extra memory .....................................................................................................................92
5 Routine Maintenance 94
Replacing consumable items...................................................................................................................94
Replacing the toner cartridge ............................................................................................................95
Replacing the drum unit...................................................................................................................103
Cleaning and Checking the machine.....................................................................................................110
Cleaning the outside of the machine...............................................................................................110
Cleaning the corona wire.................................................................................................................112
Cleaning the drum unit ....................................................................................................................114
Cleaning the paper pick-up roller.....................................................................................................119
Packing and shipping the machine........................................................................................................120
6 Troubleshooting 123
Identifying your problem ........................................................................................................................123
Error messages in the Status Monitor ...................................................................................................124
Paper jams ......................................................................................................................................127
If you are having difficulty with your machine........................................................................................138
Improving the print quality......................................................................................................................142
Machine Information..............................................................................................................................149
Default settings................................................................................................................................149