Dell 1700/1700n Owner's Manual page 58

NOTE: Do not press the button on the toner cartridge assembly.
Place the toner cartridge assembly on a flat, clean surface.
Remove the toner cartridge:
3
a
b
Unpack the new imaging drum.
4
5 8 Tr ou b l es hoot in g
Press the button on the base of the toner cartridge assembly.
Pull the toner cartridge up and out using the handle.
a
b