Lenovo L421, L420 manual For ThinkPad L520 models Step Screw quantity Color Torque

•“1010 Battery pack” on page 57

•“1030 Optical drive or travel cover” on page 60

•“1110 Wireless WAN slot cover and PCI Express Mini Card for wireless WAN” on page 71

•“1110 mSATA solid state drive” on page 73

•“1120 Palm rest assembly with cables” on page 74

•“1130 PCI Express Mini Card for wireless LAN” on page 78

•“1170 Keyboard” on page 83

•“1180 Keyboard bezel” on page 85

•“1190 LCD unit” on page 87

Table 28. Removal steps of top shielding assembly

For ThinkPad L520 models:

1

2	2	1
		2

2

1

2

3

Step	Screw (quantity)		Color	Torque
	M2	× 3 mm, flat-headd, nylon-coated (3)	Black	0.181 Nm
1
				(1.85 kgfcm)
	M2	× 5 mm, flat-head, nylon-coated (5)	Black	0.181 Nm
2
				(1.85 kgfcm)

Chapter 8. Removing and replacing a FRU 91