HP LaserJet PRO M521 Repair Manua page 104

3. To remove the main fan only: Release two tabs (callout 1), and then remove the main fan.
Reinstallation tip
Reinstallation tip
air must flow into the product. Make sure that the label side of the fan is toward the inside of the
product when the fan is reinstalled.
Figure 1-136
4. To remove the main fan and fan duct: Remove one self-tapping screw (callout 1) and one
metal screw (callout 2) and then remove the main fan and fan duct together.
Figure 1-137
1
94 Chapter 1 Removal and replacement
A third tab (callout 2) cannot be engaged.
If only the main fan was removed: When the fan is reinstalled, the
Remove the main fan (2 of 3)
1
Remove the main fan (3 of 3)
2
2
ENWW