HP LaserJet PRO M521 Repair Manua page 117

3.
Remove one screw (callout 1), the wire harness holder (callout 2), and the sheet-metal bracket
(callout 3).
TIP:
If the wire harness holder (callout 2) becomes dislodged, replace it as shown below.
Figure 1-156
4. Remove two screws and the plastic retainer.
Figure 1-157
ENWW
Remove the LVPS (2 of 10)
2
Remove the LVPS (3 of 10)
1
3
Removal and replacement procedures
107