Lenovo ThinkPad W520 4284 Hardware Maintenance Manual page 99

Table 33. Removal steps of base cover assembly
Step Screw (quantity)
1
M2 × 3 mm, wafer-head, nylon-coated (1)
2
M2 × 14 mm, wafer-head, nylon-coated (2)
3
M2 × 4 mm, wafer-head, nylon-coated (1)
Note: Applying labels to the base cover
The new base cover FRU is shipped with a kit containing labels of several kinds. When you replace the
base cover, you need to apply the following labels:
13
FCC label
14
Serial number label
15
Homologation label
Following labels need to be peeled off from the old base cover, and need to be put on the new base cover.
1
Windows license label (COA)
2
Information label
3
IMEI barcode label
Color Torque
0.181 Nm
Silver
(1.85 kgfcm)
Black 0.181 Nm
(1.85 kgfcm)
Black 0.181 Nm
(1.85 kgfcm)
5
4
.
Chapter 9 Removing and replacing a FRU
91