Lenovo ThinkPad W520 4284 Hardware Maintenance Manual page 93

Table 30. Removal steps of thermal module (continued)
6
When installing: Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2
a
grams, on the parts marked as in the following figures. Either too much or too less application of grease can
cause a thermal problem due to imperfect contact with a component. For the new CPU thermal device/fan, you
b
need to peel the thin film off from the rubbers marked .
For Switchable Graphics models:
a b
b
a
b
85
.
Chapter 9 Removing and replacing a FRU