Lenovo 4284WW9PC10B371, W520, T520i manual Removal steps of base cover assembly

Table 32. Removal steps of base cover assembly

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1

2 2

Step	Screw (quantity)		Color	Torque
	M2	× 3 mm, wafer-head, nylon-coated (1)	Silver	0.181 Nm
1
				(1.85 kgfcm)
	M2	× 14 mm, wafer-head, nylon-coated (2)	Black	0.181 Nm
2
				(1.85 kgfcm)
	M2	× 4 mm, wafer-head, nylon-coated (1)	Black	0.181 Nm
3
				(1.85 kgfcm)

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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:

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FCC label

Serial number label

Homologation label

Following labels need to be peeled off from the old base cover, and need to be put on the new base cover.

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2

3

Windows license label (COA)

Information label

IMEI barcode label

90ThinkPad T520, T520i, and W520 Hardware Maintenance Manual