Brother HL-3450CN Service Manual page 194

CHAPTER 6 PERIODIC MAINTENANCE
(3) Release the belt cartridge lock levers
at both sides (left & right). (Fig.6-11)
(4) Pull out the OPC belt cartridge.
(5) Prepare a new belt cartridge.
(6) Remove the protective sheet from a
new OPC belt cartridge, and then pull
and remove the tension release pins
from both sides (left & right). (Fig.6-12)
(7) Install the new OPC belt cartridge into
the guides at both sides in the printer.
(Fig.6-13)
(8) Set the belt cartridge lock levers at both sides (left and right).
(9) Close the top cover and the front cover.
(10) Press the power button to turn on the printer.
(11) The printer starts the warming-up process.
(12) Press any of the Menu buttons (+, -, Set or Back) to take the printer Off Line.
(13) Press + or – until "RESET MENU" appears.
(14) Press Set to proceed to the next menu level, and then press + or – until "PARTS LIFE"
appears.
(15) Press Set, and then press + until "OPC BELT" appears.
(16) Press Set, and then press Go. The printer is now in the READY state.
Belt cartridge
lock lever (Left)
Tension release pins
Protective sheet
Guide
6-22
Belt cartridge
lock lever (Right)
Fig. 6-12
Tension
release pins
Fig. 6-13
Fig. 6-14
Guide