Lenovo ThinkPad W520 Hardware Maintenance Manual - Page 103

If the Windows Certificate of Authentication label COA, Removal steps of base cover assembly

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Removal steps of base cover assembly 3 1 2 2 Step 1 2 3 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) M2 × 14 mm, wafer-head, nylon-coated (2) M2 × 4 mm, wafer-head, nylon-coated (1) Color Silver Black Black Torque 0.181 Nm (1.85 kgfcm) 0.181 Nm (1.85 kgfcm) 0.181 Nm (1.85 kgfcm) 5 4 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. Note: If the Windows Certificate of Authentication label (COA) 1 is attached to a part that is replaced, return the old part with the label to the customer, or provide the customer with a note of the label information, which includes label location, label name, label part number, serial number, and product key. 2 Information label 3 IMEI barcode label Chapter 9. Removing and replacing a FRU 97

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Removal steps of base cover assembly
2
2
3
1
Step
Screw (quantity)
Color
Torque
1
M2 × 3 mm, wafer-head, nylon-coated (1)
Silver
0.181 Nm
(1.85 kgfcm)
2
M2 × 14 mm, wafer-head, nylon-coated (2)
Black
0.181 Nm
(1.85 kgfcm)
3
M2 × 4 mm, wafer-head, nylon-coated (1)
Black
0.181 Nm
(1.85 kgfcm)
5
4
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.
Note:
If the Windows Certificate of Authentication label (COA)
1
is attached to a part that is replaced, return
the old part with the label to the customer, or provide the customer with a note of the label information,
which includes label location, label name, label part number, serial number, and product key.
2
Information label
3
IMEI barcode label
Chapter 9
.
Removing and replacing a FRU
97