Lenovo Ideapad 520S Series Hardware Maintenance Manual page 49

Figure 7. Removal steps of fan and heat sink assembly (continued)
Unplug the fan connector 3. Remove the screws 4. Release the cable from
the cable guides.
Step Screw (quantity)
M2 × 3 mm, Phillips-head, nylok-coated (2)
4
fan---mb---log up & fan---log up
Lift the fan in the direction shown by arrow 5.
When installing: Make sure that the connectors are attached firmly.
Lenovo ideapad 520S/320S
Color
Silver
5
Torque
1.0~1.5 kgf*cm
45