Справочное Руководство для Lenovo X220-4287
Table 21. Removal steps of system board, DC-in connector, fan, and ExpressCard slot assembly (continued)
Step
Screw (quantity)
Color
Torque
6
M2 × 3.5 mm, wafer-head, nylon-coated (1)
Silver
0.181 Nm
(1.85 kgfcm)
(1.85 kgfcm)
7
8
9
10
11
When installing:
• Make sure that the DC-in connector and the fan connector are attached to the system board firmly.
• Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the
part marked
a
as in the following figure. Either too much or too less application of grease can cause a thermal
problem due to imperfect contact with a component. You need to peel the thin film off from the rubber
b
.
a
b
a
2010 LCD front bezel
For access, remove this FRU:
•
•
88
ThinkPad X220 and X220i Hardware Maintenance Manual