Lenovo U31-70 Laptop Hardware Maintenance Manual - Lenovo U31-70 - Page 52

System board, Important notices for handling the system board

Get Lenovo U31-70 Laptop PDF manuals and user guides View all Lenovo U31-70 Laptop manuals
Add to My Manuals
Save this manual to your list of manuals

Page 52 highlights

U31-70 Hardware Maintenance Manual 1090 System board Important notices for handling the system board: When handling the system board, bear the following in mind. • Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite. • Avoid rough handling of any kind. • During the whole process, make sure not to drop or stack the system board. • If you put a system board down, make sure to put it only on a padded surface such as an ESD mat or conductive corrugated material. For access, remove these FRUs in order: • "1010 Base cover" on page 32 • "1020 Battery pack" on page 34 • "1030 PCI Express Mini Card for wireless LAN" on page 36 • "1050 Speakers" on page 39 • "1060 Hard disk drive" on page 40 • "1070 Fan assembly and Heat Sink assembly" on page 42 • "1080 IO board, DC-in cable" on page 46 Figure 9. Removal steps of system board Disconnect the three connectors in the directions shown by arrows 1, 2 and 3. Then remove the screws 4 and 5. 4 5 1 5 2 3 5 2 3 Step Screw (quantity) 4 M2 × 4 mm, Phillips-head, nylok-coated (1) M/B---log up 5 M2 × 2.5 mm, Phillips-head, nylok-coated (3) M/B---log up Color Torque Black 1.0~1.5 kgf*cm Silver 1.0~1.5 kgf*cm 48

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
48
U31-70 Hardware Maintenance Manual
1090
System board
Important notices for handling the system board:
When handling the system board, bear the following in mind.
•
Be careful not to drop the system board on a bench top that has a hard surface,
such as metal, wood, or composite.
•
Avoid rough handling of any kind.
•
During the whole process, make sure not to drop or stack the system board.
•
If you put a system board down, make sure to put it only on a padded surface such
as an ESD mat or conductive corrugated material.
For access, remove these FRUs in order:
•
“1010 Base cover” on page 32
•
“1020 Battery pack” on page 34
•
“1030 PCI Express Mini Card for wireless LAN” on page 36
•
“1050 Speakers” on page 39
•
“1060 Hard disk drive” on page 40
•
“1070 Fan assembly and Heat Sink assembly” on page 42
•
“1080 IO board, DC-in cable” on page 46
Figure 9. Removal steps of system board
Disconnect the three connectors in the directions shown by arrows
1
,
2
and
3
. Then remove the screws
4
and
5
.
4
5
5
5
1
2
3
2
3
Step
Screw (quantity)
Color
Torque
4
M2 × 4 mm, Phillips-head, nylok-coated (1)
M/B---log up
Black
1.0~1.5 kgf*cm
5
M2 × 2.5 mm, Phillips-head, nylok-coated (3)
M/B---log up
Silver
1.0~1.5 kgf*cm