Latitude 7455 Owner's Manual

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Installing the I/O-board FPC cable (for computers shipped with WWAN support)

CAUTION:The information in this installation section is intended for authorized service technicians only.
NOTE:The information in this installation section is only applicable for computers that are shipped with WWAN support.

Prerequisites

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The following images indicate the location of the I/O-board FPC cable and provide a visual representation of the installation procedure.
Figure 1. Installing the I/O-board FPC cable
Image: Installing the I/O-board FPC cable

Steps

  1. Slide the I/O-board FPC cable through the routing guide beneath the coin-cell battery.
  2. Connect the I/O-board FPC cable (MB) to the connector (JWWAN1) on the system board and close the latch to secure the cable in place.
  3. Connect the other end of the I/O-board FPC cable to the connector (JWWAN1) on the I/O board and close the latch to secure the cable in place.
  4. Adhere the coin-cell battery to the I/O-board FPC cable.
  5. Connect the WLAN-antenna cables to the connectors (B and W) on the WLAN module on the system board.

    The following table provides the WLAN-antenna cables color scheme for the WLAN module that is installed on your computer.

    Table 1. Antenna-cable color schemeThe following table provides the antenna-cable color scheme for the WLAN module of your computer.
    Connectors on the wireless card Antenna-cable color Silkscreen marking
    Main White W
    Auxiliary Black B
  6. Route the WLAN-antenna cables through the routing guide on the palm-rest and keyboard assembly.
  7. Route the I/O-board FPC cable through the routing guide beneath the coin-cell battery.
  8. Route the WLAN-antenna cables through the routing guide on the palm-rest and keyboard assembly.
  9. Align and slide the WLAN-thermal shield to the right until the screw hole on the WLAN-thermal shield aligns with the screw hole on the system board.
  10. Replace the screw (M2x2.5) that secures the WLAN-thermal shield to the system board.
  11. Route the I/O-board cable through the routing guides on the palm-rest and keyboard assembly.
  12. Connect the I/O-board cable (MB) to the connector (JIO1) on the system board.

Next steps

  1. Install the base cover.
  2. Install the SIM card.
  3. Follow the procedure in After working inside your computer.
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