IBM X220 - Manual (Page 92)

Table 22. Removal steps of DC-in connector, base cover, fan, digitizer pen case, and pen switch assembly (continued)
4
4 4
4
Step Screw (quantity) Color Torque
4 M2 × 3.5 mm, wafer-head, nylon-coated (4) Silver 0.181 Nm
(1.85 kgfcm)
5
6
7
When installing:
Make sure that the wireless switch is adjusted as shown by callout a .
86 ThinkPad X220 Tablet and X220i Tablet Hardware Maintenance Manual