vii
Optional Accessories................................................ 4-1
Lower Tray Unit (LT-500) ......................................... 4-2
Installing the Lower Tray Unit .........................................................4-3
Network Option NC-4100h (For HL-1850 User Only)4-5
Installing the Network Board...........................................................4-5
RAM Expansion........................................................ 4-9
Installing Additional Memory.........................................................4-13
IrDA Interface (IR-1000) ......................................... 4-16
Optional Font Package (BS-3000).......................... 4-17
Replacing the Consumables..................................... 5-1
CHANGE DRUM SOON Message............................................................... 5-11
Cleaning .......................................................................................5-14
Maintenance Messages................................................................5-19