Lenovo B50-80 Hardware Maintenance Manual - Lenovo B50-xx, B50-30 Touch Notebo - Page 55
Removal steps of system board continued, M2 x 5 mm, flat-head, nylok-coated 1
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Lenovo B50-30/B50-30 Touch/B50-45/B50-70/B50-80 Figure 13. Removal steps of system board (continued) Disconnect the ODD board connector and the USB board connector in the direction shown by arrow b . Then disconnect the EDP connector in the direction shown by arrow c . 3 2 Remove two screws d , screw e and two screws f . 6 5 4 4 Step 7 d 7 d e 7 d f Screw (quantity) M2.5 x 4 mm, flat-head, nylok-coated (2) M2 x 5 mm, flat-head, nylok-coated (1) M2 x 3 mm, flat-head, nylok-coated (2) Color Torque Black 2.0~2.5kgf.cm Silver 1.5~2.0kgf.cm Black 1.0~1.5kgf.cm 51
Lenovo B50-30/B50-30 Touch/B50-45/B50-70/B50-80
51
Figure 13. Removal steps of system board (continued)
Disconnect the ODD board connector and the USB board connector in the
direction shown by arrow
. Then disconnect the EDP connector in the
direction shown by arrow
.
Remove two screws
, screw
and two screws
.
Step
Screw (quantity)
Color
Torque
M2.5 x 4 mm, flat-head, nylok-coated (2)
Black
2.0~2.5kgf.cm
M2 x 5 mm, flat-head, nylok-coated (1)
Silver
1.5~2.0kgf.cm
M2 x 3 mm, flat-head, nylok-coated (2)
Black
1.0~1.5kgf.cm
b
c
2
3
d
e
f
5
4
4
6
d
e
f