Brother HL-3450CN Service Manual page 48

CHAPTER 3 INSTALLATION
(2) Release the belt cartridge lock levers
(left & right).
(3) Pull and remove the tension release
pins on both sides (left & right) of the
OPC belt cartridge.
(4) Remove the protective sheet from the
OPC belt cartridge.
(5) Install the OPC belt cartridge into the
guides at both sides in the printer.
(6) Set the belt cartridge lock lever at both
sides (left and right).
Belt cartridge
lock lever (L)
Tension
release pin
OPC belt
cartridge
Protective sheet
3-10
Belt cartridge lock
lever (R)
Fig. 3-8
Tension
release pin
Fig. 3-9
OPC belt cartridge
Fig. 3-10