HP 3550 - Manual (Page 132)

2. Open the lower rear door (rear output bin).
WARNING! The fuser will be hot. Wait 10 minutes before proceeding.
3. Slide out the lower rear door (rear output bin) tray extender.
4. Lift and pull the lower rear door (rear output bin) while using your finger to press the tab
with ridges on the left side of the door. Remove the lower rear door (rear output bin).
120 Chapter 7 Maintenance ENWW