Brother HL-3450CN - Manual (Page 135)

CHAPTER 5 MAINTENANCE
5-19
Replacing the OPC Belt Cartridge
1. Press the Power button to turn the printer off.
2. Open the Front Cover, and then open the Top Cover.
3. Pull the green Belt Cartridge
Lock Levers on both sides
toward you to release the lock.
Fig. 5-12
4. Remove the OPC Belt Cartridge
from the printer.
Fig. 5-13
5. Remove the Tension Release
Pins from both sides of the new
OPC Belt Cartridge.
Fig. 5-14