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Lenovo ideapad 520S/320S Hardware Maintenance Manual
1110 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.
• In 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 35
• “1030 Solid state disk” on page 36
• “1040 Hard disk drive” on page 37
• “1060 PCI Express Mini Card for wireless LAN” on page 40
• “1070 Fan and heat sink assembly” on page 43
• “1080 IO board” on page 46
• “1090 Speaker” on page 48
• “1100 Fingerprint module (Lenovo ideapad 520S-14IKB) (on select models)”
Figure 11. Removal steps of system board
Detach the five connectors (touchpad connector, KB backlight connector,
KB FPC connector, DC-in cable connector and EDP cable connector) in the
directions shown by arrows
1
,
2
,
3
and
4
. Remove the screws
5
.
5
5
5
4
3
2
1
2
1
2
1
Step Screw (quantity)
Color Torque
5
M2 × 3 mm, Phillips head, nylok-coated (3)
M/B---log up
Silver
1.0~1.5 kgf*cm
When installing:
Make sure that the connectors are attached firmly.