Service Manual
Table Of Contents
- Latitude 5420 Service Manual
- Contents
- Working inside your computer
- Major components of your computer
- Removing and installing components
- Recommended tools
- Screw list
- Disassembly and reassembly
- Subscriber Identity Module (SIM) card
- Micro Secure Digital (SD) Card
- Base cover
- WLAN card
- WWAN card
- Solid-state drive
- Memory modules
- Battery
- Battery cable
- Assembly inner frame
- LED board
- Heat sink
- Speakers
- System board
- Power-button board
- Smart card reader
- Keyboard assembly
- Keyboard bracket
- Display assembly
- Display bezel
- Display panel
- Camera/microphone module
- eDP/display cable
- Sensor board
- Display hinges
- Display back cover
- Dummy SIM-card slot filler
- Palm-rest assembly
- Software
- BIOS setup
- Troubleshooting
- Getting help and contacting Dell
Installing the WWAN card
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the WWAN card and provides a visual representation of the installation procedure.
Steps
1. Connect the antenna cables to the WWAN card.
The following table provides the antenna-cable color scheme:
Table 3. Antenna-cable color scheme
Connectors on the WWAN card Antenna-cable color
Main (white triangle) White
Auxiliary (black triangle) Black
2. Place the WWAN card bracket on the WWAN card.
3. Align the notch on the WWAN card with the tab on the WWAN slot.
4. Slide the WWAN card at an angle into the WWAN slot.
5. Replace the screw (M2x2.5) to secure the WWAN bracket to the WWAN card.
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Removing and installing components