HP LaserJet PRO M521 Repair Manua page 135

3.
Release the wire harness from the retainers (callout 1), and then feed the wire harness through the
opening in the chassis (callout 2).
Figure 1-185
4.
Release the wire harness from the retainers (callout 1).
Figure 1-186
ENWW
Remove the sub fan and fan duct (2 of 5)
1
Remove the sub fan and fan duct (3 of 5)
1
2
Removal and replacement procedures
125