Sharp MX-4100N Service Manual page 479

2. Operational descriptions
When the toner cartridge is inserted into the machine, the lock pawl
is released and the supply shutter is opened.
The transport shutter is opened and closed by the shaft linked with
the developing lever.
The toner supply section of the developing unit is opened and
closed when the open/close level on the unit pushes the block .
3.
A. Toner cartridges
1)
2)
MX-5001N TONER SUPPLY SECTION J – 2
Disassembly and assembly
Open the front cover.
Lift the lock lever, and pull it out slowly and horizontally.