HP LaserJet PRO M521 Repair Manua page 87

2.
Locate the base roller assembly (callout 1), release one tab (callout 2), and then slide the assembly
toward the outside of the product to release it.
Figure 1-111
3.
Remove the base-plate roller assembly.
Figure 1-112
ENWW
Tray 2 or Tray 3 base-plate roller assembly (1 of 2)
2
1
Tray 2 or Tray 3 base-plate roller assembly (2 of 2)
Removal and replacement procedures
77