Lenovo ThinkPad X390 Yoga Hardware Maintenance Manual page 80

Note: Loosen the screws
When installing:
• Always wear fingerstalls when handling the thermal fan assembly. Do not touch or hold any part of the
thermal fan assembly with bare fingers.
• Before you attach the thermal fan assembly to the computer, apply thermal grease, at an amount of 0.2
grams, on the part marked
application of grease can cause a thermal problem due to imperfect contact with a component.
• Do not touch the thermal grease.
• Do not press, touch, or rotate the fan impeller.
• Do not touch the fan inlet hole.
• Do not twist or pull the cable of the thermal fan assembly.
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X390 Yoga Hardware Maintenance Manual
6
in ascending alphabetical order (
5f
a as shown in the following illustrations. Either too much or too less
a g
to ) as shown.
5g
5a
5d
5e
5c
5b