IBM W520, T520I manual Removal steps of system board and magnesium structure frame

Table 36. Removal steps of system board and magnesium structure frame

2

4

2

3

		1
		1
Step	Screw (quantity)	Color	Torque
1	Hex stud, nylon-coated (2)	Silver	0.392 Nm
			(4.0 kgfcm)
2	M2 × 7 mm, wafer-head, nylon-coated (2)	Silver	0.181 Nm
			(1.85 kgfcm)
3	M2 × 3 mm, wafer-head, nylon-coated (1)	Silver	0.181 Nm
			(1.85 kgfcm)

When installing When you replace the system board, attach thermal rubbers as shown in this figure. Depending on the models you are servicing, the number of thermal rubbers are different. Check the thermal rubbers on the old system board, and find duplicates of them in the new FRU package and apply them to the new system board.

a b

c

d

96ThinkPad T520, T520i, and W520 Hardware Maintenance Manual