Lenovo ThinkPad S5 2nd Generation Hardware Maintenance Manual page 86

Step Screw (quantity)
3
M2 × 4 mm, flat-head, nylon-coated (1)
When you install the thermal fan assembly:
• 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.
• Do not apply pressure on the top and bottom covers of the thermal fan assembly.
• Do not press the heat pipe. Hold both sides of the heat pipe if you need to take the thermal fan assembly.
• Do not shake or drop the thermal fan assembly.
• Ensure that the fan connector is attached firmly.
• Ensure that the base cover assembly is attached firmly; otherwise, battery connection may fail.
• 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. You
should peel the thin film off from the rubbers marked
80
Hardware Maintenance Manual
4c
a
as shown in the following illustrations. Either too much or too less
Color
Black
4b
4d
4g
4a 4f
4e
b .
Torque
0.196 Nm
(2 kgf-cm)