Lenovo B50-45 Hardware Maintenance Manual - Lenovo B50-xx, B50-30 Touch Notebo - Page 57

Fan and heat sink assembly, 5~2.0kgf.cm

Page 57 highlights

Lenovo B50-30/B50-30 Touch/B50-45/B50-70 1140 Fan and heat sink assembly For access, remove these FRUs in order: • "1010 Battery pack" on page 33 • "1020 Optical drive" on page 34 • "1030 Bottom slot cover" on page 36 • "1040 Hard disk drive" on page 37 • "1050 DIMM" on page 39 • "1060 PCI Express Mini Card for wireless LAN/WAN" on page 40 • "1070 Keyboard" on page 41 • "1080 Keyboard bezel" on page 43 • "1110 Led board" on page 48 • "1130 System board" on page 50 Figure 14. Removal steps of fan and heat sink assembly Disconnect the fan connector in the direction by arrow a. Remove the screw b and six screws c. Then remove the fan and heat sink in the direction as shown by arrow d. 3 3 3 3 4 2 3 1 Step Screw (quantity) 7 d b M2 x 5 mm, flat‐head, nylok‐coated (1) 7 d c M2 x 3 mm, flat‐head, nylok‐coated (6) Color Torque Silver 1.5~2.0kgf.cm Black 1.0~1.5kgf.cm When installing: Make sure that all the fan and DC‐IN connectors are attached firmly. 53

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Lenovo B50-30/B50-30 Touch/B50-45/B50-70
53
1140 Fan and heat sink assembly
For
 
access,
 
remove
 
these
 
FRUs
 
in
 
order:
“1010
 
Battery
 
pack”
 
on
 
page
 
33
“1020
 
Optical
 
drive”
 
on
 
page
 
34
“1030
 
Bottom
 
slot
 
cover”
 
on
 
page
 
36
“1040
 
Hard
 
disk
 
drive”
 
on
 
page
 
37
“1050
 
DIMM”
 
on
 
page
 
39
“1060
 
PCI
 
Express
 
Mini
 
Card
 
for
 
wireless
 
LAN/WAN”
 
on
 
page
 
40
“1070
 
Keyboard”
 
on
 
page
 
41
“1080
 
Keyboard
 
bezel”
 
on
 
page
 
43
“1110
 
Led
 
board”
 
on
 
page
 
48
“1130
 
System
 
board”
 
on
 
page
 
50
Figure
 
14.
 
Removal
 
steps
 
of
 
fan
 
and
 
heat
 
sink
 
assembly
Disconnect
 
the
 
fan
 
connector
 
in
 
the
 
direction
 
by
 
arrow
 
 
Remove
 
the
 
screw
 
and
 
six
 
screws
 
 
Then
 
remove
 
the
 
fan
 
and
 
heat
 
sink
 
in
 
the
 
direction
 
as
 
shown
 
by
 
arrow
 
.
 
When installing:
 
Make
 
sure
 
that
 
all
 
the
 
fan
 
and
 
DC
IN
 
connectors
 
are
 
attached
 
firmly.
Step
Screw (quantity)
Color
Torque
M2
 
x
 
5
 
mm,
 
flat
head,
 
nylok
coated
 
(1)
 
Silver
1.5~2.0kgf.cm
M2
 
x
 
3
 
mm,
 
flat
head,
 
nylok
coated
 
(6)
 
Black
1.0~1.5kgf.cm
a
b
c
d
3
3
3
3
3
2
1
4
b
c