Brother Copier/Printer MFC-895DW - Manual (Page 113)

Troubleshooting
101
B
f
Push down the green lock lever and take
the toner cartridge out of the drum unit.
Remove the jammed paper if there is
any inside the drum unit.
g
Put the toner cartridge back into the
drum unit until you hear it lock into place.
If you put the cartridge in correctly, the
green lock lever on the drum unit will lift
automatically.
Note
Make sure that you put in the toner
cartridge correctly or it may separate from
the drum unit.