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Dell Latitude 7320 Detachable Service Manual
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Dell Latitude 7320 Detachable Service Manual

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Latitude 7320 Detachable
Service Manual
Regulatory Model: T04H
Regulatory Type: T04H001
March 2021
Rev. A00

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Table of Contents
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Summary of Contents for Dell Latitude 7320 Detachable

  • Page 1 Latitude 7320 Detachable Service Manual Regulatory Model: T04H Regulatory Type: T04H001 March 2021 Rev. A00...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

  • Page 3: Table Of Contents

    Contents Chapter 1: Working inside your computer..................6 Before working inside your computer..........................6 Safety precautions................................6 Electrostatic discharge—ESD protection........................7 ESD field service kit ................................7 After working inside your computer..........................8 Chapter 2: Removing and installing components................9 Recommended tools................................9 Screw list....................................
  • Page 4 Docking connector................................40 Removing the docking connector..........................40 Installing the docking connector..........................41 Hall sensor daughter board............................. 43 Removing the Hall sensor daughter board......................43 Installing the Hall sensor daughter board......................43 Heat sink....................................44 Removing the heat sink..............................44 Installing the heat sink..............................45 System fan..................................
  • Page 5 Dell SupportAssist Pre-boot System Performance Check diagnostics..............82 Running the SupportAssist Pre-Boot System Performance Check..............82 System diagnostic lights..............................83 Recovering the operating system..........................84 Flashing BIOS (USB key)..............................84 Flashing the BIOS................................85 WiFi power cycle................................85 Flea power release................................85 Chapter 6: Getting help and contacting Dell................86 Contents...

  • Page 6: Chapter 1: Working Inside Your Computer

    Standby power Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are essentially powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and suspended into a sleep mode and has other advanced power management features.

  • Page 7: Electrostatic Discharge-Esd Protection

    ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

  • Page 8: After Working Inside Your Computer

    It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while performing service and that they use anti-static bags for transporting sensitive components.

  • Page 9: Chapter 2: Removing And Installing Components

    Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Topics: • Recommended tools • Screw list • Subscriber Identity Module (SIM) card • Display assembly • Solid-state drive •...
  • Page 10 Table 1. Latitude 5520Precision 3560 screw list Component Screw type Quantity Screw image Base cover Captive screws WLAN card bracket Captive screw WWAN card bracket Captive screw M.2 2230 solid-state drive M2x4 M.2 2280 solid-state drive M2x4 Assembly inner frame M2x3 3-cell battery M2x4...

  • Page 11: Subscriber Identity Module (Sim) Card

    Table 1. Latitude 5520Precision 3560 screw list Component Screw type Quantity Screw image Display panel M2.5x3.5 Subscriber Identity Module (SIM) card Removing the SIM tray Prerequisites 1. Follow the procedure in Before working inside your computer. NOTE: SIM card or SIM card tray removal is only available on systems that are shipped with WWAN module. The procedure for removal is only applicable for systems that are shipped with a WWAN module.

  • Page 12: Installing The Sim Tray

    Steps 1. Insert a pin into the hole of the SIM card slot. 2. Push the pin inward to release the SIM card tray 3. Slide the SIM card tray out of the slot in the computer. 4. Remove the SIM card from the SIM card tray. 5.

  • Page 13: Display Assembly

    4. Align the SIM card tray with the slot in the computer and carefully slide it in. 5. Slide the SIM card tray into the slot, until it clicks into place. Next steps 1. Follow the procedure in After working inside your computer.
  • Page 14 Removing and installing components...
  • Page 15 Removing and installing components...
  • Page 16 1. Open the kick stand to the widest possible angle, the system will power on. NOTE: The Latitude 7320 Detachable has an automatic power-on feature. The system powers on anytime the kick stand is opened. Follow the below steps to ensure that the system does not power on while the performing replacement procedures.

  • Page 17: Installing The Display Assembly

    CAUTION: Make sure that the system has already been powered off before removing the screws. Remove the four (M1.6x4) screws securing the display panel to the display back cover. 5. Using a plastic scribe, push the two release holes next to the kick stand hinges to loosen the display assembly from the display back cover.
  • Page 18 Removing and installing components...
  • Page 19 Removing and installing components...
  • Page 20 Removing and installing components...

  • Page 21: Solid-State Drive

    Steps 1. Place the display assembly face down on a padded surface just below the computer. 2. Connect the display cable to the connector on the system board. 3. Align and place the display cable bracket and place it on the display cable connector. 4.

  • Page 22: Installing The M.2 Solid-State Drive

    About this task The following images indicate the location of the M.2 solid-state drive and provide a visual representation of the removal procedure. Steps 1. Remove the single (M2x2.5) screw securing the M.2 solid-state drive shield in place. 2. Remove the M.2 solid-state drive shield from the computer. NOTE: If the thermal pad located under the M.2 SSD gets detached from the system board, re-adhere it to the system board.
  • Page 23 About this task The following image indicates the location of the M.2 solid-state drive and provides a visual representation of the installation procedure. Steps 1. Align the notch on the M.2 solid-state drive with the tab on the M.2 solid-state drive slot on the system board. 2.

  • Page 24: Wwan Card

    WWAN card Removing the WWAN card Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the tray. 3. Remove the display assembly. About this task The following image indicates the location of the WWAN card and provide a visual representation of the removal procedure. Steps 1.

  • Page 25: Installing The Wwan Card

    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.

  • Page 26: Speakers

    Table 2. Antenna-cable color scheme Connectors on the WWAN card Antenna-cable color Auxiliary (black triangle) Black 4. Place the WWAN card bracket on the antenna connectors of the WWAN card. 5. Tighten the single captive screw to secure the WWAN bracket to the WWAN card. Next steps 1.

  • Page 27: Installing The Left Speaker

    Steps 1. Disconnect the speaker cable from the connector on system board. 2. Lift the speakers along with the cable off the system board. Installing the left speaker 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 left speaker and provides a visual representation of the installation procedure.

  • Page 28: Removing The Right Speaker

    Removing the right speaker Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the tray. 3. Remove the display assembly. About this task The following images indicate the location of the right speaker and provide a visual representation of the removal procedure. Steps 1.

  • Page 29: Rear Camera

    Steps 1. Align and place the speaker in its slot on the system board. 2. Reconnect the fan FPC and left speaker cable to the connector on the system board. Next steps 1. Install the display assembly. 2. Install the tray.

  • Page 30: Installing The Rear-Facing Camera

    Steps 1. Lift the system board shield off the system board. 2. Disconnect the rear-facing camera FPC from the connector on the system board. 3. Remove the two (M1.6x3) screws that secure the rear-facing camera in place. 4. Lift the rear-facing camera out of the system. Installing the rear-facing camera Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 31 Steps 1. Align and place the rear-facing camera into the slot on the display back cover. 2. Replace the two (M1.6x3) that secure the rear-facing camera to the display back cover. 3. Connect the rear-facing camera FPC to the connector on the system board. 4.

  • Page 32: Microphone Module

    Microphone module Removing the right microphone modules Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the SIM tray 3. Remove the display assembly. About this task The following images indicate the location of the right microphone module and provide a visual representation of the removal procedure.

  • Page 33: Removing The Left Microphone Module

    Steps 1. Align and place the right microphone into the slot on the display back cover. 2. Connect the right microphone module to the front-facing camera module. NOTE: The right microphone module must be connected to both the front-facing camera and system board. Failure to make both of these connections will result in the front-facing camera not working..

  • Page 34: Installing The Left Microphone Modules

    Steps 1. Lift the system board shield off the system board. 2. Disconnect the left microphone module FPC. 3. Lift the left microphone module out of the system. Installing the left microphone modules 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 left microphone module and provides a visual representation of the installation procedure.

  • Page 35: Front Camera

    Steps 1. Align and place the left microphone into the slot on the display back cover. 2. Connect the left microphone module FPC to the connector on the system board. 3. Place the system board shield on the system board and gently press until it snaps it into place. Next steps 1.

  • Page 36: Installing The Front-Facing Camera

    Installing the front-facing camera 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 front-facing camera module and provides a visual representation of the installation procedure.

  • Page 37: Installing The Kick Stand

    About this task The following images indicate the location of the kick stand and provide a visual representation of the removal procedure. Steps 1. Remove the four (M1.6x3) screws that secure the kick stand to the kick stand hinges. 2. Flip the system over and lift the kick stand away from the system. Installing the kick stand Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 38 Steps 1. Align the screw holes on the kick stand with the screw holes on the frame, and flip the system. NOTE: Ensure that the pins on the kick stand are inserted into the alignment holes on the kick stand hinges. 2.

  • Page 39: Kickstand Hinges

    Kickstand Hinges Removing the kick stand hinges Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the tray. 3. Remove the display assembly. 4. Remove the kick stand. About this task The following images indicate the location of the kick stand hinges and provide a visual representation of the removal procedure. Steps 1.

  • Page 40: Docking Connector

    Steps 1. Align the screw holes on the kick stand hinges with the screw holes on the frame. 2. Replace the six (M2x2) screws that secure the Kick stand hinges to the frame. Next steps 1. Install the kick stand. 2.

  • Page 41: Installing The Docking Connector

    Steps 1. Open the latch and disconnect the docking connector FPC from the connector on the system board. 2. Peel the docking connector from the battery. 3. Remove the two (M2x2) screws that secure the docking connector bracket to the frame. 4.
  • Page 42 Steps 1. Align and place docking connector into slot on the frame. 2. Align and place the docking connector bracket on the docking connector. 3. Replace the two (M2x2) screws to secure the docking connector bracket to the frame. 4. Affix the docking connector FPC to the battery. 5.

  • Page 43: Hall Sensor Daughter Board

    Hall sensor daughter board Removing the Hall sensor daughter board Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the tray. 3. Remove the display assembly. About this task The following images indicate the location of the Hall sensor daughter board and provide a visual representation of the removal procedure.

  • Page 44: Heat Sink

    Steps 1. Align and place the Hall sensor daughter board into the slot on the frame. 2. Replace the single (M2x2) that secures the Hall sensor daughter board to the frame. 3. Affix the Hall sensor daughter board FPC to the battery. 4.

  • Page 45: Installing The Heat Sink

    Steps 1. Lift the system board shielding cover from the system board. 2. Peel back the WLAN antenna grounding foil and WWAN antenna grounding foil from the heat sink.. 3. Loosen the four captive screws that secure the heat sink as per their callout . 4.
  • Page 46 Steps 1. Align the screw holes on the heat sink with the screw holes on the system board. 2. Tighten the four captive screws that secure the heat sink to the system board as per their callout. 3. Affix the WLAN antenna grounding foil and WWAN antenna grounding foil to the heat sink. 4.

  • Page 47: System Fan

    System fan Removing the left fan Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the tray. 3. Remove the display assembly. About this task The following images indicate the location of the left fan and provide a visual representation of the removal procedure. Steps 1.

  • Page 48: Installing The Left Fan

    5. Disconnect the left system fan FPC from the connector on the system board. 6. Lift the left fan out of the computer. Installing the left fan 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 left fan and provide a visual representation of the installation procedure.

  • Page 49: Removing The Right System Fan

    7. Tighten the single captive screw that secures the WLAN card bracket to the system board. Next steps 1. Install the display assembly. 2. Install the tray. 3. Follow the procedure in After working inside your computer. Removing the right system fan Prerequisites 1.

  • Page 50: Volume Button Daughter Board

    Steps 1. Align the screw holes on the right system fan with the screw holes on the frame. 2. Replace the two screws (M2x3) to secure the right system fan to the frame. 3. Connect the right system fan FPC to the connector on the system board. Next steps 1.

  • Page 51: Installing The Volume Button Daughter Board

    Steps 1. Open the latch and disconnect the volume button daughter board FPC from the system board. 2. Remove the two (M1.6x3) screws that secure the volume button daughter board to system board. 3. Lift the volume button daughter board out of the system. Installing the volume button daughter board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 52: Power-Button Board

    Steps 1. Align and place the volume button daughter board on the system board. NOTE: When installing the volume button daughter board, fully insert the power button module into its compartment, and then press the volume buttons to check whether the daughter board is correctly installed. 2.

  • Page 53: Installing The Power-Button Board

    Steps 1. Open the latch and disconnect the power-button daughter board FPC and the fingerprint reader FFC from the power-button daughter board. 2. Remove the two (M1.6x1.5) screws that secure the power-button daughter board to the frame.. 3. Lift the power-button daughter board out of the system. Installing the power-button board About this task The following images indicate the location of the power-button board and provide a visual representation of the installation...

  • Page 54: Fingerprint Reader

    Steps 1. Align and place the power-button board on the frame. 2. Replace the two screws (M1.6x1.5) that secure the power-button board to the frame. 3. Connect the power-button daughter board FPC and the fingerprint reader FFC to the power-button daughter board Next steps 1.

  • Page 55: Installing The Fingerprint Reader

    Steps 1. Peel and remove the fingerprint reader bracket. NOTE: If the fingerprint bracket located under the power button daughter board gets detached from the back cover, re-install it onto the back cover. 2. Lift the fingerprint reader out of the system. Installing the fingerprint reader About this task The following images indicate the location of the fingerprint reader and provide a visual representation of the installation...

  • Page 56: Battery

    Steps 1. Align and place the fingerprint reader on the frame. 2. Replace the fingerprint reader bracket on the finger print reader. Next steps 1. Install the power-button daughter board. 2. Install the right system fan. 3. Install the WWAN card.

  • Page 57: Removing The Battery

    ● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell.

  • Page 58: Installing The Battery

    3. Disconnect the battery cable connector from the system board. 4. Remove the six (M2x3) screws that secure the battery to the frame. 5. Lift the battery out of the system. Installing the battery 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 battery and provides a visual representation of the installation procedure.

  • Page 59: System Board

    6. Connect the HALL sensor daughter board FPC and docking connector FPC to the connector on the system board and close the latch. Next steps 1. Install the display assembly. 2. Install the tray. 3. Follow the procedure in After working inside your computer.
  • Page 60 Removing and installing components...

  • Page 61: Installing The System Board

    Steps 1. Remove the two (M1.6x2.5) screws that secure the Darwin cable brackets to the system board. 2. Disconnect the volume button FPC, USH FFC, audio port FPC, rear-facing camera FPC, and the power button daughter board FPC from the system board. 3.
  • Page 62 Removing and installing components...
  • Page 63 Steps 1. Align the screw holes on the system board with the screw holes on the frame. 2. Replace the two (M2x2) screws that secure the system board to the frame. 3. Connect the volume button FPC, USH FFC, audio port FPC, rear-facing camera FPC, and the power button daughter board FPC to the system board 4.

  • Page 64: Smart Card Reader

    Smart card reader Removing the smart card reader Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the tray. 3. Remove the display assembly. 4. Remove the WWAN card. 5. Remove the left system fan. 6. Remove the right system fan.

  • Page 65: Installing The Smart Card Reader

    Steps 1. Remove the three (M2x2) screws that secure the smart card reader support brackets to the frame. 2. Remove the smart card reader support brackets. 3. Open the latch and disconnect the smart card reader FPC from the connector on the USH board. 4.
  • Page 66 Steps 1. Align and place the smart card reader on the frame. 2. Replace the three (M2x2) screws that secure the smart card reader to the frame. 3. Connect the smart card reader FPC to the connector on the USH board and close the latch. 4.
  • Page 67 12. Install the tray. 13. Follow the procedure in After working inside your computer. Removing and installing components...

  • Page 68: Chapter 3: Software

    Downloading the drivers Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. Enter the Service Tag of your computer, and then click Submit. NOTE: If you do not have the Service Tag, use the auto-detect feature or manually browse for your computer model.

  • Page 69: Chapter 4: System Setup

    1. Press the power button to turn on your tablet. 2. Press and hold the Volume Up button when the Dell logo appears on the screen. 3. When the F12 boot selection menu appears, select BIOS Setup using the Volume Up button.

  • Page 70: System Configuration Screen Options

    Option Description Boot Sequence Boot Sequence Allows you to change the order in which the computer attempts to find an operating system. The options are: ● Windows Boot Manager By default, the options is checked. Boot List Options Allows you to change the boot list option: ●...

  • Page 71: System Configuration Screen Options

    Option Description Timeout on ● 5 sec Battery ● 10 sec—enabled by default ● 15 sec ● 30 sec ● 1 min ● 5 min ● 15 min ● Never Keyboard The Keyboard Backlight Timeout dims out with AC option. The main keyboard illumination feature is not Backlight affected.
  • Page 72 Option Description NOTE: Both the option is enabled by default. Dell Type-C dock Does not support this configuration configuration Thunderbolt Allows you to configure the Thunderbolt™ adapter security settings within the Operating System. Adapter NOTE: Security Levels are not applicable or enforced in the Pre-boot environment.

  • Page 73: Video Screen Options

    Option Description Unobtrusive Allows you to select the option. When enabled, pressing Fn+F7 turns off all light and sound emissions in Mode the system. To resume normal operation, press Fn+F7 again. This option is disabled by default. Miscellaneous Allows you to enable or disable various on board devices: Devices ●...

  • Page 74: Secure Boot

    Option Description ● Attestation Enable. This option is selected by default. ● PPI Bypass for Disable Commands ● Key Storage Enable. This option is selected by default. ● SHA-256. This option is selected by default. CAUTION: For the TPM upgrade/downgrade process, it is recommended to complete the process in an AC power with AC adapter plugged into the computer.

  • Page 75: Intel Software Guard Extensions

    Intel software Guard Extensions Option Description Intel SGX Enable This option enables or disables to provide a secured environment for running code/storing sensitive information in the context of the main OS. The options are: ● Disabled ● Enabled ● Software Controlled.This option is selected by default. Enclave Memory Allows you to reserve the memory size.

  • Page 76: Post Behavior

    ● Adaptive This option is enabled by default. Configuration ● Standard Fully charges your battery at a standard rate. ● ExpressCharge The battery charges over a shorter period of time using Dell’s fast charging technology. ● Primarily AC use ● Custom If Custom Charge is selected, you can also configure Custom Charge Start and Custom Charge Stop.

  • Page 77: Virtualization Support Options

    Option Description Fn Lock Options Allows you to let hot key combinations Fn + Esc toggle the primary behavior of F1 – F12, between their standard and secondary functions. If you disable this option, you cannot toggle dynamically the primary behavior of these keys.

  • Page 78: Maintenance

    Steps 1. Restart the tabletnotebookdesktop. 2. Go to Dell.com/support. 3. Enter the Service Tag or Express Service Code and click Submit. NOTE: To locate the Service Tag, click Where is my Service Tag? NOTE: If you cannot find your Service Tag, click Detect My Product.

  • Page 79: Updating Your System Bios Using A Usb Flash Drive

    3. Insert the USB flash drive into the system that requires the BIOS update. 4. Restart the system and press F12 when the Dell splash logo appears to display the One Time Boot Menu. 5. Using arrow keys, select USB Storage Device and click Enter.

  • Page 80: System And Setup Password

    Figure 1. DOS BIOS Update Screen System and setup password Table 3. System and setup password Password type Description System password Password that you must enter to log on to your system. Setup password Password that you must enter to access and make changes to the BIOS settings of your computer.

  • Page 81: Deleting Or Changing An Existing System Setup Password

    ● A password can have up to 32 characters. ● The password can contain the numbers 0 through 9. ● Only lower case letters are valid, upper case letters are not allowed. ● Only the following special characters are allowed: space, (”), (+), (,), (-), (.), (/), (;), ([), (\), (]), (`). 3.

  • Page 82: Chapter 5: Troubleshooting

    Check diagnostics About this task SupportAssist diagnostics (also known as system diagnostics) performs a complete check of your hardware. The Dell SupportAssist Pre-boot System Performance Check diagnostics is embedded with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or device groups allowing you to: ●...

  • Page 83: System Diagnostic Lights

    System diagnostic lights Battery-status light Indicates the power and battery-charge status. Solid white — Power adapter is connected and the battery has more than 5 percent charge. Amber — Computer is running on battery and the battery has less than 5 percent charge. ●...

  • Page 84: Recovering The Operating System

    It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state. You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures.

  • Page 85: Flashing The Bios

    Follow these steps to flash the BIOS: Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. Click Product support, enter the Service Tag of your computer, and then click Submit. NOTE: If you do not have the Service Tag, use the auto-detect feature or manually browse for your computer model.

  • Page 86: Chapter 6: Getting Help And Contacting Dell

    Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 4. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com Tips Contact Support In Windows search, type Contact Support, and press Enter.

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