1200 System Board Assembly, Magnesium Structure Frame, And Modem Daughter Card (Mdc) - Lenovo ThinkPad W520 4284 Hardware Maintenance Manual

• 1100 Keyboard bezel assembly
• 1110 Bluetooth daughter card (BDC-3.0)
• 1120 Backup battery
• 1130 Smart Card or Smart Card dummy spacer
• 1140 Speaker assembly
• 1150 Thermal module
• 1170 LCD unit
• 1180 Base cover assembly
Table 34. Removal steps of I/O sub card
Step Screw (quantity)
1
M2 × 7 mm, wafer-head, nylon-coated (2)
When installing: Make sure that the connector is attached firmly.
1200 System board assembly, magnesium structure frame, and modem
daughter card (MDC)
Note: The system board does not contain the Ethernet port, the ac power connector, and the modem port.
For the Ethernet port, see 1190 I/O sub card. The ac power connector is installed on the magnesium
structure frame. If the computer is equipped with an MDC, the modem port is also installed on the
magnesium structure frame.
For access, remove these FRUs in order:
• 1010 Battery pack
• 1020 Serial Ultrabay Enhanced device or travel bezel
• 1030 DIMM slot cover
• 1040 DIMM (bottom slot)
• 1050 Hard disk drive slot cover, hard disk drive (HDD) and HDD rubber rails or solid state drive (SSD)
and storage converter
• 1060 Keyboard
• 1070 DIMM (upper slot)
• 1080 PCI Express Mini Card for wireless LAN
• 1090 PCI Express Mini Card for wireless WAN or mSATA solid state drive
Color Torque
0.181 Nm
Silver
(1.85 kgfcm)
.
Chapter 9 Removing and replacing a FRU
93