Lenovo ideapad 320S Hardware Maintenance Manual page 50

ideapad 320S-13IKB/320S-13IKB U/320S-13IKB D Hardware Maintenance
Manual
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Figure 6. Removal steps of fan and heat sink (continued)
One-fan model:
Two-fan model:
When installing: Before you attach the heat sink to the computer, apply
thermal grease, to the lettered parts shown in the figures above: for parts a
and b , apply at an amount of 0.2 grams, for parts c and d , at 1.0 grams.
Either too much or too little grease application can cause a thermal problem
due to imperfect contact with a component.