Latitude 7220EX Rugged Extreme Tablet Service Manual Regulatory Model: T03H Regulatory Type: T03H004
Notes, cautions, and warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. © 2019 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Contents 1 Working on your tablet..................................................................................................................5 Safety instructions................................................................................................................................................................ 5 Before working inside the tablet....................................................................................................................................
Recovering the operating system..................................................................................................................................... 29 WiFi power cycle................................................................................................................................................................. 29 5 Getting help............................................................................................................................... 31 Contacting Dell...
1 Working on your tablet Safety instructions Prerequisites Use the following safety guidelines to protect your tablet from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure in this document assumes that the following conditions exist: • • You have read the safety information that shipped with your tablet. A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
4. Disconnect your tablet and all attached devices from their electrical outlets. 5. Press and hold the power button while the tablet is unplugged to ground the system board. NOTE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface simultaneously as touching a connector on the back of the tablet. 6. Remove any installed ExpressCards or Smart Cards from the appropriate slots.
ESD field service kit The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components: antistatic mat, wrist strap, and bonding wire. Components of an ESD field service kit The components of an ESD field service kit are: • • • • • • • Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures.
3. Turn on your tablet.
2 Major components of the tablet 1. Display assembly 2.
3. WLAN card 4. WWAN card 5. Heat-sink 6. USB Type-C bracket 7. Mini-serial bracket 8. Power adapter port 9. Mini-serial port 10. System board 11. NFC antenna 12. System cover 13. Left battery (as viewed from the back) 14. Right battery (as viewed from the back) 15. Battery cover assembly 16. Microphone assembly circuit board 17. System fan 18. Solid-state drive 19. Front camera cable 20.
3 System setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program. Certain changes can make your computer work incorrectly. NOTE: Before you change BIOS Setup program, it is recommended that you write down the BIOS Setup program screen information for future reference. Use the BIOS Setup program for the following purposes: • • • Get information about the hardware installed in your computer, such as the amount of RAM and the size of the hard drive.
Keys Navigation Tab Moves to the next focus area. Esc Moves to the previous page until you view the main screen. Pressing Esc in the main screen displays a message that prompts you to save any unsaved changes and restarts the system. Boot Sequence Boot sequence enables you to bypass the System Setup–defined boot device order and boot directly to a specific device (for example: optical drive or hard drive).
Option Description • • • Date/Time Always, Except Internal HDD&PXE Always Never Allows you to set the date and time settings. Changes to the system date and time take effect immediately. . System information Table 2. System Configuration Option Description SATA Operation Allows you to configure the operating mode of the integrated hard drive controller.
Option Description • • Keyboard Backlight Timeout on AC The Keyboard Backlight Timeout dims out with AC option. The main keyboard illumination feature is not affected. Keyboard Illumination will continue to support the various illumination levels. This field has an effect when the backlight is enabled.
Option Description • • • • • • Enable User-Facing Camera (enabled by default) Enable World-Facing Camera (enabled by default) Enable Dedicated GPS Radio (enabled by default) Enable Secure Digital (SD) Card (enabled by default) Secure Digital (SD) Card Boot Secure Digital (SD) Card Read-Only Mode Video Option Description LCD Brightness Allows you to set the display brightness depending up on the power source—On Battery and On AC. The LCD brightness is independent for battery and AC adapter.
Option Description • • • • PPI Bypass for Clear Commands Attestation Enable (default) Key Storage Enable (default) SHA-256 (default) Choose any one option: • • Absolute Disabled Enabled (default) This field lets you Enable, Disable or Permanently Disable the BIOS module interface of the optional Absolute Persistence Module service from Absolute Software. • • • OROM Keyboard Access Enabled - This option is selected by default.
Option Description • • Reset All Keys- Resets to default setting Delete All Keys- Deletes all the keys NOTE: If you disable the Custom Mode, all the changes made will be erased and the keys will restore to default settings. Intel Software Guard Extensions Table 5. Intel Software Guard Extensions Option Description Intel SGX Enable This field specifies you to provide a secured environment for running code/storing sensitive information in the context of the main OS.
Option Description This option is set by default. Hyper-Thread Control Allows you to enable or disable the HyperThreading in the processor. • • Disabled Enabled—Default Power management Option Description Lid Switch Allows you to disable the lid switch so the screen does not shut off when lid is closed. Default setting: Enable Lid Switch is selected. AC Behavior Allows you to enable or disable the computer from turning on automatically when an AC adapter is connected.
Option Description If Custom Charge is selected, you can also configure Custom Charge Start and Custom Charge Stop. NOTE: All charging mode may not be available for all the batteries. To enable this option, disable the Advanced Battery Charge Configuration option. Battery#2 Charge Configuration Allows you to select the charging mode for the battery. The options are: • • • • • Adaptive—enabled by default Standard—Fully charges your battery at a standard rate.
Option Description • • Thorough—enabled by default Auto Extended BIOS POST Time Allows you to create an extra preboot delay. The options are: • • • 0 seconds—enabled by default.
Wireless Allows you to enable or disable the internal wireless devices. All the options are enabled by default. Table 7. Wireless Options Descriptions WWAN/GPS Allows enabling/disabling of internal WWAN/GPS device Bluetooth Allows enabling/disabling of internal Bluetooth device WLAN Allows enabling/disabling of internal WLAN device Contactless Smartcard/NFC Allows enabling/disabling of internal Contactless Smartcard/NFC device Table 8.
Option Description Thermal Events Allows you to view and clear the System Setup (Thermal) events. Power Events Allows you to view and clear the System Setup (Power) events. SupportAssist System Resolution Table 9. SupportAssist System Resolution Option Description Auto OS Recovery Threshold The Auto OS recovery threshold setup option controls the automatic boot flow for SupportAssist System Resolution Console and for Dell OS recovery tool.
9. Identify the latest BIOS file and click Download. 10. Select your preferred download method in the Please select your download method below window, click Download File. The File Download window appears. 11. Click Save to save the file on your computer. 12. Click Run to install the updated BIOS settings on your computer. Follow the instructions on the screen.
Updating the Dell BIOS in Linux and Ubuntu environments If you want to update the system BIOS in a Linux environment such as Ubuntu, see https://www.dell.com/support/article/sln171755/. Flashing the BIOS from the F12 One-Time boot menu Updating your system BIOS using a BIOS update .exe file copied to a FAT32 USB key and booting from the F12 one time boot menu.
4. Select external USB device 5. Once the file is selected, Double click the flash target file, then press submit .
6. Click the Update BIOS then system will reboot to flash the BIOS. 7. Once complete, the system will reboot and the BIOS update process is completed. System and setup password Table 10. 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. You can create a system password and a setup password to secure your computer.
NOTE: System and setup password feature is disabled. Assigning a system setup password Prerequisites You can assign a new System or Admin Password only when the status is in Not Set. About this task To enter the system setup, press F2 immediately after a power-on or re-boot. Steps 1. In the System BIOS or System Setup screen, select Security and press Enter. The Security screen is displayed. 2. Select System/Admin Password and create a password in the Enter the new password field.
4 Troubleshooting Enhanced Pre-Boot System Assessment (ePSA) diagnostics About this task The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with the BIOS and is launched by the BIOS internally.
The power and battery-status light blinks amber along with beep codes indicating failures. For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected. The following table shows different power and battery-status light patterns and associated problems. Table 11.
NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device. Steps 1. Turn off your computer. 2. Turn off the modem. 3. Turn off the wireless router. 4. Wait for 30 seconds. 5. Turn on the wireless router. 6. Turn on the modem. 7. Turn on your computer.
5 Getting help Topics: • Contacting Dell Contacting Dell Prerequisites NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog. About this task Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues: Steps 1.
