DELL Technologies Precision 3490 Lightweight Workstation Owner’s Manual

: June 1, 2024
: DELL Technologies

Table of Contents

DELL Technologies Precision 3490 Lightweight Workstation
Product Information
Product Usage Instructions
Frequently Asked Questions
Set up your Precision 3490
Views of Precision 3490
Specifications of Precision 3490
Working inside your computer
Removing and installing Customer Replaceable Units (CRUs)
Removing and installing Field Replaceable Units (FRUs)
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

DELL Technologies Precision 3490 Lightweight Workstation

DELL-Technologies-Precision-3490-Lightweight-Workstation-
image

Product Information

Specifications:

Model: Precision 3490
Regulatory Model: P165G
Regulatory Type: P165G004/P165G005
Release Date: February 2024
Revision: A00

Product Usage Instructions

Chapter 1: Set up your Precision 3490

About this task: The images in this document may differ from your computer depending on the configuration you ordered.

Connect the power adapter and press the power button. Note: The battery may go into power-saving mode during shipment to conserve charge on the battery. Ensure that the power adapter is connected to your computer when it is turned on for the first time.
Finish the operating system setup.
- For Ubuntu: Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu, search in the Knowledge Base Resource at www.dell.com/support.
- For Windows: Follow the on-screen instructions to complete the setup. Dell Technologies recommends connecting to a network for Windows updates. If connecting to a secured wireless network, enter the password when prompted. If connected to the Internet, sign in with or create a Microsoft account. On the Support and Protection screen, enter your contact details.
Locate and use Dell apps from the Windows Start menu.
Resources| Description
---|---
Dell Product Registration| Register your computer with Dell.
Dell Help & Support| Access help and support for your computer. In SupportAssist,
click the warranty expiry date to renew or upgrade your
warranty.
Dell Update| Updates your computer with critical fixes and latest device
drivers as they become available. For more information about using
Dell Update, see the product guides and third-party license
documents at www.dell.com/support.

Frequently Asked Questions

Q: How do I renew or upgrade my warranty using SupportAssist?
- A: In SupportAssist, click on the warranty expiry date to access options for renewing or upgrading your warranty.
Q: Where can I find more information about installing and configuring Ubuntu?
- A: For more information about installing and configuring Ubuntu, you can search in the Knowledge Base Resource at www.dell.com/support.

“`

Precision 3490
Owner’s Manual
Regulatory Model: P165G Regulatory Type: P165G004/P165G005 February 2024 Rev. A00

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.

Set up your Precision 3490

About this task NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Steps 1. Connect the power adapter and press the power button.

Figure 1. Connect power adapter and press the power button
NOTE: The battery may go into power-saving mode during shipment to conserve charge on the battery. Ensure that the power adapter is connected to your computer when it is turned on for the first time.
2. Finish the operating system setup. For Ubuntu: Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu, search in the Knowledge Base Resource at www.dell.com/support.
For Windows: Follow the on-screen instructions to complete the setup. When setting up, Dell Technologies recommends that you: Connect to a network for Windows updates.
NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when prompted. If connected to the Internet, sign-in with or create a Microsoft account. On the Support and Protection screen, enter your contact details.
3. Locate and use Dell apps from the Windows Start menu–Recommended.

Set up your Precision 3490

Table 1. Locate Dell apps

Resources

Description

Dell Product Registration Register your computer with Dell.

Dell Help & Support Access help and support for your computer.
SupportAssist SupportAssist is the smart technology that keeps your computer running at its best by optimizing settings, detecting issues, removing viruses and notifies when you must make computer updates. SupportAssist proactively checks the health of your computer hardware and software. When an issue is detected, the necessary system state information is sent to Dell to begin troubleshooting. SupportAssist is preinstalled on most of the Dell devices running the Windows operating system. For more information, see SupportAssist for Business PCs manuals at www.dell.com/support/home/ product-support/product /supportassist-business-pcs/docs.
NOTE: In SupportAssist, click the warranty expiry date to renew or upgrade your warranty.
Dell Update Updates your computer with critical fixes and latest device drivers as they become available. For more information about using Dell Update, see the product guides and third-party license documents at www.dell.com/support.
Dell Digital Delivery Download software applications, which are purchased but not preinstalled on your computer. For more information about using Dell Digital Delivery, search in the Knowledge Base Resource at www.dell.com/support.

Set up your Precision 3490

Right

Views of Precision 3490

Figure 2. Right view
1. Universal audio jack Connect headphones or a headset (headphone and microphone combo).
2. USB 3.2 Gen 1 port with PowerShare Connect devices such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps. PowerShare enables you to charge your USB devices even when your computer is turned off. NOTE: If your computer is turned off or in a hibernation state, you must connect the power adapter to charge your devices using the PowerShare port. You must enable this feature in the BIOS setup program. NOTE: Certain USB devices may not charge when the computer is turned off or in a sleep state. In such cases, turn on the computer to charge the device.
3. HDMI 2.1 TMDS port Connect to a TV, external display, or another HDMI-in enabled device. Provides video and audio output.
4. Security-cable slot (wedge-shaped) Connect a security cable to prevent unauthorized movement of your computer.
Left

Figure 3. Left view

Views of Precision 3490

1. Network port Connect an Ethernet (RJ45) cable from a router or a broadband modem for network or Internet access, with a transfer rate of 10/100/1000 Mbps.
2. USB 3.2 Gen 1 port Connect devices such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps.
3. Thunderbolt 4.0 with DisplayPort Alt Mode/USB Type-C/USB4/Power Delivery Supports USB4, DisplayPort 2.1, Thunderbolt 4 and also enables you to connect to an external display using a display adapter. Provides data transfer rates of up to 40 Gbps for USB4 and Thunderbolt 4. NOTE: You can connect a Dell Docking Station to the Thunderbolt 4 ports. For more information, search in the Knowledge Base Resource at www.dell.com/support.
NOTE: A USB Type-C to DisplayPort adapter (sold separately) is required to connect a DisplayPort device.
NOTE: USB4 is backward compatible with USB 3.2, USB 2.0, and Thunderbolt 3.
NOTE: Thunderbolt 4 supports two 4K displays or one 8K display. 4. Thunderbolt 4.0 with DisplayPort Alt Mode/USB Type-C/USB4/Power Delivery
Supports USB4, DisplayPort 2.1, Thunderbolt 4 and also enables you to connect to an external display using a display adapter. Provides data transfer rates of up to 40 Gbps for USB4 and Thunderbolt 4.
NOTE: You can connect a Dell Docking Station to the Thunderbolt 4 ports. For more information, search in the Knowledge Base Resource at www.dell.com/support.
NOTE: A USB Type-C to DisplayPort adapter (sold separately) is required to connect a DisplayPort device.
NOTE: USB4 is backward compatible with USB 3.2, USB 2.0, and Thunderbolt 3.
NOTE: Thunderbolt 4 supports two 4K displays or one 8K display. 5. Power and battery-status light
Indicates the power state and battery state of the computer. Solid white–Power adapter is connected and the battery is charging. Solid amber–Battery charge is low or critical. Off–Battery is fully charged.
NOTE: On certain computer models, the power and battery-status light are also used for diagnostics. For more information, see the Troubleshooting section in your computer’s Service Manual.
6. nano-SIM slot (optional) Insert a nano-SIM card to connect to a mobile broadband network.
7. Smart-card reader slot (optional) Using smart card provides authentication in corporate networks.

Views of Precision 3490

Top

Figure 4. Top view
1. Touchpad Move your finger on the touchpad to move the mouse pointer. Tap to left-click and two fingers tap to right-click.
2. NFC or Contactless smart card reader (optional) Provides contactless access of cards in corporate networks.
3. Power button with optional fingerprint reader Press to turn on the computer if it is turned off, in sleep state, or in hibernation state. When the computer is turned on, press the power button to put the computer into a sleep state; press and hold the power button for 10 seconds to force shut-down the computer. If the power button has a fingerprint reader, place your finger on the power button steadily to log in.
NOTE: You can customize the power-button behavior in Windows.

Views of Precision 3490

Front

Figure 5. Front view
1. Left microphone Provides digital sound input for audio recording and voice calls.
2. Infrared emitter (optional) Emits infrared light, which enables the infrared camera to sense and track motion.
3. Infrared camera (optional) Enhances security when paired with Windows Hello face authentication.
4. Camera shutter Slide the privacy shutter to the left to access the camera lens.
5. Camera Enables you to video chat, capture photos, and record videos.
6. Camera-status light Turns on when the camera is in use.
7. Ambient-light sensor The sensor detects the ambient light and automatically adjusts the display brightness.
8. Right microphone Provides digital sound input for audio recording and voice calls.

Views of Precision 3490

Bottom

Figure 6. Bottom view
1. Left speaker Provides audio output.
2. Right speaker Provides audio output.
3. Service Tag label The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your computer and access warranty information.
Service Tag
The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in your computer and access warranty information.

Views of Precision 3490

Figure 7. Service Tag location

Battery charge and status light

The following table lists the battery charge and status light behavior of your Precision 3490.

Table 2. Battery charge and status light behavior

Power source

LED behavior

AC Adapter

Off

AC Adapter

Solid white

Battery

Off

Battery

Solid amber (590+/-3 nm)

System power state S0 – S5 S0 – S5 S0 – S5 S0 – S5

Battery charge level Fully charged < Fully charged 11-100% < 10%

S0 (ON) – Computer is turned on. S4 (Hibernate) – The system consumes the least power compared to all other sleep states. The system is almost at an OFF
state, except for a trickle power. The context data is written to a hard drive.
S5 (OFF) – The system is in a shutdown state.

Views of Precision 3490

Specifications of Precision 3490

Dimensions and weight

The following table lists the height, width, depth, and weight of your Precision 3490.

Table 3. Dimensions and weight Description Height:
Front height

Values 19.06 mm (0.75 in.)

Rear height

21.04 mm (0.83 in.)

Width

321.35 mm (12.65 in.)

Depth

212.00 mm (8.35 in.)

Weight NOTE: The weight of your computer depends on the configuration that is ordered and manufacturing variability.

1.40 kg (3.09 lb) – minimum

Processor
The following table lists the details of the processors that are supported for your Precision 3490.

Specifications of Precision 3490

Table 4. Processor Description Processor type

Option one
Intel Core Ultra 5 125U vPro Essentials

Processor wattage

15 W

Processor total core count 12

Performance-cores

Efficient-cores
Processor total thread counts
NOTE: Intel HyperThreading Technology is only available on Performance-cores.

E-cores: 8 LPE-cores: 2
14

Processor speed

Up to 4.30 GHz

Performance-cores frequency

Processor base frequency

1.30 GHz

Maximum turbo frequency

4.30 GHz

Efficient-cores frequency

Processor base frequency

0.80 GHz

Maximum turbo frequency

3.60 GHz

Processor cache

12 MB

Integrated graphics

Intel Graphics

Option two Intel Core Ultra 5 155U vPro Essentials 15 W 12 2 E-cores: 8 LPE- cores: 2 14
Up to 4.80 GHz
1.70 GHz 4.80 GHz
1.20 GHz 3.80 GHz 12 MB Intel Graphics

Option three Intel Core Ultra 5 125H vPro Essentials 28 W 14 4 E-cores: 8 LPE- cores: 2 18
Up to 4.50 GHz
1.20 GHz 4.50 GHz
0.70 GHz 3.60 GHz 18 MB Intel Arc Graphics

Specifications of Precision 3490

Table 5. Processor Description Processor type

Option four

Option five

Intel Core Ultra 7 135H Intel Core Ultra 7 155H vPro

vPro Enterprise

Essentials

Processor wattage

28 W

Processor total core count

Performance-cores

Efficient-cores
Processor total thread counts NOTE: Intel HyperThreading Technology is only available on Performance-cores.

E-cores: 8 LPE-cores: 2
18

E-cores: 8 LPE-cores: 2
22

Processor speed

Up to 4.60 GHz

Up to 4.80 GHz

Performance-cores frequency
Processor base frequency
Maximum turbo frequency
Efficient-cores frequency
Processor base frequency
Maximum turbo frequency
Processor cache

1.70 GHz 4.60 GHz
1.20 GHz 3.60 GHz 18 MB

1.70 GHz 4.80 GHz
1.20 GHz 3.80 GHz 24 MB

Integrated graphics

Intel Arc Graphics

Option six Intel Core Ultra 7 165H vPro Enterprise 28 W 16 6 E-cores: 8 LPE- cores: 2 22
Up to 5.00 GHz
1.40 GHz 5.00 GHz
0.90 GHz 3.80 GHz 24 MB Intel Arc Graphics

Chipset

The following table lists the details of the chipset that is supported for your Precision 3490.

Table 6. Chipset Description Chipset

Values Integrated in the processor

Processor

Intel Core Ultra 5/7

DRAM bus width

64-bit

Flash EPROM

Up to 64 MB

PCIe bus

Up to Gen4

Specifications of Precision 3490

Operating system
Your Precision 3490 supports the following operating systems:
Windows 11 Home Windows 11 Pro Ubuntu Linux 22.04 LTS Red Hat 9.4

Memory

The following table lists the memory specifications of your Precision 3490.

Table 7. Memory specifications Description Memory slots

Values Two-SODIMM slots

Memory type

DDR5

Memory speed

5600 MT/s

Maximum memory configuration

64 GB

Minimum memory configuration

8 GB

Memory size per slot

8 GB, 16 GB, or 32 GB

Memory configurations supported

8 GB, 1 x 8 GB, DDR5, 5600 MT/s, single-channel 16 GB, 1 x 16 GB, DDR5, 5600 MT/s, single-channel 16 GB, 2 x 8 GB, DDR5, 5600 MT/s, dual-channel 32 GB, 2 x 16 GB, DDR5, 5600 MT/s, dual-channel 32 GB, 1 x 32 GB, DDR5, 5600 MT/s, single-channel 64 GB, 2 x 32 GB, DDR5, 5600 MT/s, dual-channel

External ports

The following table lists the external ports of your Precision 3490.

Table 8. External ports Description Network port

Values One RJ45 Ethernet port

USB ports

One USB 3.2 Gen 1 port One USB 3.2 Gen 1 port with PowerShare Two Thunderbolt 4.0 ports with DisplayPort Alt
Mode/USB Type-C/USB4/Power Delivery NOTE: You can connect a Dell Docking Station to this
port. For more information, search in the Knowledge
Base Resource at www.dell.com/support.

Audio port

One universal audio port

Video port

One HDMI 2.1 TMDS port

Specifications of Precision 3490

Table 8. External ports (continued) Description Media-card reader Power- adapter port Security-cable slot SIM-card slot

Values One smart-card reader slot (optional) USB Type-C power input Security- cable slot (wedge-shaped) nano-SIM card slot (optional)

Internal slots

The following table lists the internal slots of your Precision 3490.

Table 9. Internal slots Description M.2

Values
One M.2 2230 slot for WiFi and Bluetooth combo card One M.2 2230 slot for solid state drive One M.2 3042 slot for WWAN card (optional)
NOTE: To learn more about the features of different types of M.2 cards, search in the Knowledge Base Resource at www.dell.com/support.

Ethernet

The following table lists the wired Ethernet Local Area Network (LAN) specifications of your Precision 3490.

Table 10. Ethernet specifications Description Model number

Values
Intel Jacksonville I219-LM 10/100/Gb (1000BASE-T) for vPRO configurations
Intel Jacksonville I219-V 10/100/Gb (1000BASE-T) for non-vPRO configurations

Transfer rate

10/100/1000 Mbps

Wireless module

The following table lists the Wireless Local Area Network (WLAN) modules that are supported on your Precision 3490.

Table 11. Wireless module specifications

Description

Option one

Model number

Realtek RTL8852BE

Option two Intel AX211

Transfer rate

Up to 1201 Mbps

Up to 2400 Mbps

Frequency bands supported

2.4 GHz/5 GHz

2.4 GHz/5 GHz/6 GHz

Wireless standards

WiFi 802.11a/b/g

Specifications of Precision 3490

Table 11. Wireless module specifications (continued)

Description

Option one

Option two

Wi-Fi 4 (WiFi 802.11n) Wi-Fi 5 (WiFi 802.11ac) Wi-Fi 6 (WiFi 802.11ax)

Wi-Fi 4 (WiFi 802.11n) Wi-Fi 5 (WiFi 802.11ac) Wi-Fi 6E (WiFi 802.11ax)
NOTE: Wi-Fi 6 is supported
in regions where Wi-Fi 6E is
unavailable.

Encryption

64-bit/128-bit WEP AES-CCMP TKIP

Bluetooth wireless card

Bluetooth 5.3

NOTE: The version of the Bluetooth wireless card may vary depending on the operating system that is installed on your computer.

WWAN module

The following table lists the Wireless Wide Area Network (WWAN) module supported on your Precision 3490.

Table 12. WWAN module specifications

Description

Option one

Model number

Qualcomm Snapdragon X12 Global LTEAdvanced (DW5825e), CAT12

Option two
Qualcomm Snapdragon X62 Global 5G Modem (DW5932e)

Form factor

M.2 3042 Key-B

Host interface

USB 3.0/2.0

PCIe Gen3

Network standard

LTE FDD/TDD, WCDMA/HSPA+, GNSS/ Beidou, GPS/GLONASS/Galileo

NR FR1 (Sub6) FDD/TDD, LTE FDD/ TDD, WCDMA/HSPA+, GPS/GLONASS/ Galileo/Beidou

Transfer data rate

Up to 600 Mbps DL (CAT12) Up to 150 Mbps UL

5G NR: DL 3.5 Gbps/UL 900 Mbps
LTE: DL 1.6 Gbps (CAT19)/UL 211 Mbps (CAT18)
UMTS: DL DC-HSPA+ Rel8:42 Mbps/UL 5.76 Mbps

Operating frequency bands

LTE (B1, B2, B3, B4, B5, B7, B8, B12, B13, NR (n1, n2, n3, n5, n7, n8, n12, n13,

B14, B17, B18, B19, B20, B25, B26, B28,

n14, 18, n20, n25, n26, n28, n30, n38,

B29, B30, B32, B38, B39, B40, B41, B42,

n40, n41, n48, n53, n66, n70, n71, n75,

B43, B48, B66, B71)

n76, n77, n78, n79)

HSPA+ (1, 2, 4, 5, 6, 8, 19)

LTE (B1, B2, B3, B4, B5, B7, B8, B12, B13, B14, B17, B18, B19, B20, B25,
B26, B28, B29, B30, B32, B34, B38,
B39, B40, B41, B42, B43, B46, B48,
B66, B71)

WCDMA/HSPA+ (1, 2, 4, 5, 8)

Power supply

DC 3.135 V to 4.400 V, Typical 3.300 V

DC 3.135 V to 3.630 V, Typical 3.300 V

SIM card

Supported through external SIM slot

Specifications of Precision 3490

Table 12. WWAN module specifications (continued)

Description eSIM with dual SIM (DSSA)

Option one
Supported NOTE: The availability of eSIM functionality embedded on the module is dependent on the region and specific carrier requirements.

Option two
Supported NOTE: The availability of eSIM functionality embedded on the module is dependent on the region and specific carrier requirements.

Antenna diversity

Supported

Radio On/Off

Supported

Wake on wireless

Supported

Temperature

Normal operating temperature: -10°C to +55°C (15°F to +131°F)
Extended Operating temperature: -30°C to +75°C (-22°F to +131°F)

Normal operating temperature: -10°C to +55°C (15°F to +131°F)
Extended Operating temperature: -40°C to +85°C (-40°F to +185°F)

Antenna connector

WWAN Main Antenna x 1 WWAN Diversity Antenna x 1

WWAN Main Antenna x 1 WWAN Diversity Antenna x 1 4×4 MIMO Antenna x 2

NOTE: For instructions on how to find your computer’s International Mobile Equipment Identity (IMEI) number, search in the Knowledge Base Resource at www.dell.com/support.

Audio

The following table lists the audio specifications of your Precision 3490.

Table 13. Audio specifications Description Audio controller

Values Waves MaxxAudio Pro 13.0

Stereo conversion

Supported

Internal audio interface

High definition audio interface

External audio interface

Universal Audio Jack/HDMI 2.1 TMDS port

Number of speakers

Internal-speaker amplifier

Not supported

External volume controls

Keyboard shortcut controls

Speaker output:

Average speaker output

2 W

Peak speaker output

2 W

Subwoofer output

Not supported

Microphone

Digital-array microphones in camera assembly

Specifications of Precision 3490

Storage

This section lists the storage options on your Precision 3490. Your Precision 3490 supports one M.2 2230 solid state drive.

Table 14. Storage specifications Storage type M.2 2230 solid state drive

Interface type PCIe Gen4 NVMe, up to 64 Gbps

M.2 2230 self-encrypting solid state drive

PCIe Gen4 NVMe, up to 64 Gbps

Capacity Up to 2 TB 512 GB

Keyboard

The following table lists the keyboard specifications of your Precision 3490.

Table 15. Keyboard specifications Description Keyboard type

Values
Standard backlit AI hotkey keyboard Standard non-backlit AI hotkey keyboard
NOTE: Copilot in Windows is available only in approved markets.

Keyboard layout

QWERTY

Number of keys Keyboard size

English US, English International, Arabic, Canada bilingual (MUI), Chinese traditional, French-Canadian, Greek, Hebrew, Korean, Russian, Thai, Ukrainian: 79 keys
French-Canadian Quebec, Portuguese Brazilian, Belgian, Bulgarian, Czech & Slovakian (MUI), Danish, English UK, Estonian, French European, German, Hungarian, Icelandic, Italian, Nordic (MUI), Norwegian, Portugese Iberian, Slovenian, Spanish (Castillian), Spanish (Latin America), Swedish/Finnish, Swiss European (MUI), Turkish, Turkish (F): 80 keys
Japanese: 83 keys
X=19.05 mm key pitch
Y=18.05 mm key pitch

Keyboard shortcuts

Some keys on your keyboard have two symbols on them. These keys can be used to type alternate characters or to perform secondary functions. To type the alternate character, press Shift and the desired key. To perform secondary functions, press Fn and the desired key.
NOTE: You can define the primary behavior of the
function keys (F1F12) changing Function Key Behavior
in BIOS setup program.

Keyboard function keys
The F1-F12 keys at the top of the keyboard are function keys. By default, these keys are used to perform specific functions defined by the software application in use.

Specifications of Precision 3490

Table 16. List of keyboard shortcuts Key F1 F2 F3 F4 F5
F6 F7 F8 F10 F11 F12 Copilot

Primary behavior Mute audio
Decrease volume
Increase volume
Mute microphone
Keyboard backlight NOTE: Toggle to cycle the keyboard backlight status through off, lowbacklight, and high-backlight.
Decrease brightness
Increase brightness
Switch to external display
Print Screen
Home
End
Launch Copilot in Windows NOTE: If Copilot in Windows is not available on your computer, the CoPilot key launches Windows Search. For more information about Copilot in Windows, search in the Knowledge Base Resource at www.dell.com/support.

You can run the secondary tasks that are indicated by the symbols on the function keys by pressing the function key with fn, for example, fn and F1. See the table below for the list of secondary tasks and the key combinations to run them.
NOTE: Keyboard characters may differ depending on the keyboard language configuration. Keys that are used for tasks remain the same, regardless of the keyboard language.
NOTE: You can define the primary behavior of function keys in the Function Key Behavior menu of the BIOS setup program.

Table 17. Secondary tasks of keyboard keys Key combination for task fn and F1 fn and F2 fn and F3 fn and F4 fn and F5 fn and F6 fn and F7 fn and F8 fn and F9 fn and F10 fn and F11 fn and F12

What the task does Operating system and application-specific F1 behavior Operating system and application-specific F2 behavior Operating system and application-specific F3 behavior Operating system and application-specific F4 behavior Operating system and application-specific F5 behavior Operating system and application-specific F6 behavior Operating system and application- specific F7 behavior Operating system and application-specific F8 behavior Operating system and application-specific F9 behavior Operating system and application-specific F10 behavior Operating system and application-specific F11 behavior Operating system and application-specific F12 behavior

Specifications of Precision 3490

Keys with alternate characters
There are other keys on your keyboard with alternate characters. The symbols that are shown at the bottom of these keys are the main characters that are displayed when the key is pressed; the symbols that are shown at the top of these keys are displayed when the key is pressed with the shift key. For example, if you press 2, 2 is displayed; if you press Shift and 2, @ is displayed.

Camera

The following table lists the camera specifications of your Precision 3490.

Table 18. Camera specifications Description Number of cameras

Values One

Camera type

FHD RGB HDR camera
FHD RGB+IR HDR camera
FHD RGB+IR HDR camera with Ambient Light Sensor, Express Sign-In with Presence Detection and Intelligent Privacy

Camera location

Front camera

Camera sensor type

CMOS sensor technology

Camera resolution: Still image

2.07 megapixel

Video

1920 x 1080 (FHD) at 30 fps

Infrared camera resolution: Still image

0.23 megapixels

Video

640 x 360 at 30 fps

Diagonal viewing angle: Camera

80 degrees

Infrared camera

86.60 degrees

Touchpad

The following table lists the touchpad specifications of your Precision 3490.

Table 19. Touchpad specifications Description Touchpad resolution:

Values > 300 DPI

Touchpad dimensions: Horizontal

115 mm (4.52 in.)

Vertical

67 mm (2.64 in.)

Specifications of Precision 3490

Table 19. Touchpad specifications (continued) Description Touchpad gestures

Values
For more information about touchpad gestures are available on: Windows, see the Microsoft Knowledge Base article at
support.microsoft.com. Ubuntu, see ubuntu.com/support.

Power adapter

The following table lists the power adapter specifications of your Precision 3490.

Table 20. Power adapter specifications

Description

Option one

Type

65 W adapter, USB-C NOTE: Applicable to computers shipped with integrated graphics card.

Option two
100 W adapter, USB-C NOTE: Applicable to computers shipped with integrated or discrete graphics card.

Option three
130 W adapter, USB-C NOTE: Applicable to computers shipped with integrated or discrete graphics card.

Power-adapter dimensions: Height

28.00 mm (1.10 in.)

26.50 mm (1.04 in.)

22.00 mm (0.87 in.)

Width

51.00 mm (2.01 in.)

60.00 mm (2.36 in.)

66.00 mm (2.60 in.)

Depth

112.00 mm (4.41 in.)

122.00 mm (4.80 in.)

143.00 mm (5.63 in.)

Input voltage

100 VAC240 VAC

100 VAC-240 VAC

Input frequency

50 Hz60 Hz

50 Hz-60 Hz

Input current (maximum)

1.70 A

1.80 A

Output current (continuous)

20 V/3.25 A (continuous) 15 V/3.00 A (continuous) 9 V/3.00 A (continuous) 5 V/3.00 A (continuous)

20 V/5 A (continuous) 15 V/3 A (continuous) 9 V/3 A (continuous) 5 V/3 A (continuous)

20 V/6.50 A (continuous) 5 V/1.00 A (continuous)

Rated output voltage

20 VDC 15 VDC 9 VDC 5 VDC

20 VDC 5 VDC

Temperature range:

Operating

0°C to 40°C (32°F to 104°F) 0°C to 40°C (32°F to 104°F) 0°C to 40°C (32°F to 104°F)

Storage

-40°C to 70°C (-40°F to 158°F)

CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.

Specifications of Precision 3490

Battery

The following table lists the battery specifications of your Precision 3490.

Table 21. Battery specifications

Description

Option one

Option two

Battery type

3 cell, 42

3 cell, 42 Wh,

Wh, ExpressCharge, Long Cycle Life,

ExpressCharge Boost ExpressCharge

Option three

Option four

3 cell, 54

3 cell, 54 Wh,

Wh, ExpressCharge, Long Cycle Life,

ExpressCharge Boost ExpessCharge

Battery voltage

11.40 VDC

Battery weight (minimum)

0.19 kg (0.41 lb)

0.22 kg (0.48 lb)

Battery dimensions: Height

5.73 mm (0.22 in.)

Width

263.00 mm (10.35 in.) 263.00 mm (10.35 in.) 263.00 mm (10.35 in.) 263.00 mm (10.35 in.)

Depth 68.90 mm (2.71 in.) 68.90 mm (2.71 in.) 68.90 mm (2.71 in.) 68.90 mm (2.71 in.)

Temperature range:

Operatin g

Charge: 0°C to 45°C (32°F to 113°F)
Discharge: 0°C to 70°C (32°F to 158°F)

Storage -20°C to 65°C (-4°F -20°C to 65°C (-4°F -20°C to 65°C (-4°F -20°C to 65°C

to 149°F)

(-4°F to 149°F)

Battery operating time

Varies depending on operating conditions and can significantly reduce under certain powerintensive conditions.

Battery charging time (approximate)
NOTE: Control the charging time, duration, start and end time, and so on using the Dell Power Manager application. For more information about Dell Power Manager, search in the Knowledge Base Resource at www.dell.com/support.

Express Charge
Method:
0°C to 15°C maximum allowable charge time from 0% to 100% RSOC is 4 hours.
16°C to 45°C normal express charge.
46°C to 50°C maximum allowable charge time from 0% to 100% RSOC is 3 hours.
Standard Charge/
Predominately AC

Varies depending on operating conditions and can significantly reduce under certain powerintensive conditions.

Varies depending on operating conditions and can significantly reduce under certain powerintensive conditions.
Express Charge
Method:
0°C to 15°C maximum allowable charge time from 0% to 100% RSOC is 4 hours.
16°C to 45°C normal express charge.
46°C to 50°C maximum allowable charge time from 0% to 100% RSOC is 3 hours.
Standard Charge/
Predominately AC

Specifications of Precision 3490

Table 21. Battery specifications (continued)

Description

Option one

User Charge
Method:
0°C to 15°C maximum allowable charge time from 0% to 100% RSOC is 4 hours.
16°C to 50°C maximum allowable charge time from 0% to 100% RSOC is 3 hours.
Express Charge
Boost Charge
Method (Fast
Charge for Initial
35%):
16°C to 45°C target charge time from 0% to 35% RSOC is 20 minutes for Accelerated Charge.

Coin-cell battery

CR2032

Option two

Option three

0°C to 15°C

User Charge

maximum allowable Method:

charge time from 0°C to

0% to 100% RSOC

15°C maximum

is 4 hours.

allowable charge

16°C to 50°C

time from 0% to

maximum allowable 100% RSOC is 4

charge time from

hours.

0% to 100% RSOC 16°C to

is 3 hours.

50°C maximum

allowable charge

time from 0% to

100% RSOC is 3

hours.

Express Charge
Boost Charge
Method (Fast
Charge for Initial
35%):
16°C to 45°C target charge time from 0% to 35% RSOC is 20 minutes for Accelerated Charge.

CR2032

Option four User Charge Method: 0°C to
15°C maximum allowable charge time from 0% to 100% RSOC is 4 hours. 16°C to 50°C maximum allowable charge time from 0% to 100% RSOC is 3 hours.
CR2032

CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.
CAUTION: Dell recommends that you charge the battery regularly for optimal power consumption. If your battery charge is completely depleted, connect the power adapter, turn on your computer, and then restart your computer to reduce the power consumption.

Display

The following table lists the display specifications of your Precision 3490.

Table 22. Display specifications

Description

Option one

Display type

14-inch Full High Definition (FHD)

Option two

Option three

14-inch Full High Definition

(FHD), ComfortView Plus Low (FHD)

Blue Light, battery saving

Touch options

Yes

Display-panel technology

In-Plane Switching (IPS)

Display-panel dimensions (active area):
Height

173.95 mm (6.84 in.)

Width

309.40 mm (12.18 in.)

Specifications of Precision 3490

Table 22. Display specifications (continued)

Description Diagonal

Option one 355.60 mm (14.00 in.)

Display-panel native resolution
Luminance (typical)

1920 x 1080 300 nits

Megapixels

2.07

Color gamut

72% NTSC

Pixels Per Inch (PPI)

157

Contrast ratio (minimum)

600:1

Response time (maximum)

35 millisecond

Refresh rate

60 Hz

Horizontal view angle

85 +/- degrees

Vertical view angle

85 +/- degrees

Pixel pitch

0.161 x 0.161 mm

Power consumption (maximum)
Anti-glare vs glossy finish

4.60 W Anti-glare

Option two 355.60 mm (14.00 in.) 1920 x 1080
400 nits 2.07 100% sRGB 157 1000:1 35 millisecond 60 Hz 85 +/- degrees 85 +/- degrees 0.161 x 0.161 mm 2.50 W
Anti-glare

Option three 355.60 mm (14.00 in.) 1920 x 1080
250 nits 2.07 45% NTSC 157 600:1 35 millisecond 60 Hz 85 +/- degrees 85 +/- degrees 0.161 x 0.161 mm 3.10 W
Anti-glare

Fingerprint reader (optional)

The following table lists the specifications of the optional fingerprint- reader of your Precision 3490.

Table 23. Fingerprint reader specifications Description Fingerprint-reader sensor technology

Values Capacitive

Fingerprint-reader sensor resolution

500 dpi

Fingerprint-reader sensor pixel size

108 x 88

Sensor
The following table lists the sensor of your Precision 3490. Table 24. Sensor Sensor support Ambient Light Sensor Accelerometer in the base: ST Micro LIS2DW12TR Accelerometer in the hinge-up (Upsell config with Emza/ALS/IR camera): ST Micro LNG2DMTR

Specifications of Precision 3490

GPU–Integrated

The following table lists the specifications of the integrated Graphics Processing Unit (GPU) supported by your Precision 3490.

Table 25. GPU–Integrated Controller Intel Arc Graphics

Memory size Shared system memory

Processor
Intel Core H processors configured with a minimum of 16 GB dual-channel (128bit) memory

Intel Graphics

Shared system memory

Intel Core Ultra 5/7

GPU–Discrete

The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your Precision 3490.

Table 26. GPU–Discrete Controller

Memory size

Memory type

NVIDIA RTX 500 Ada Generation

4 GB

GDDR6

External display support

The following table lists the external display support for your Precision 3490.

Table 27. External display support

Graphics card

Supported external displays with laptop display enabled

Intel Arc Graphics

Supported external displays with laptop display disabled
4

Intel Graphics

NOTE: For more information about external display support, see the External Display Connection Guide on www.dell.com/ support.

Hardware security
The following table lists the hardware security of your Precision 3490.
Table 28. Hardware security Hardware security Trusted Platform Module (TPM) 2.0 discrete FIPS 140-2 certification for TPM TCG Certification for TPM (Trusted Computing Group) Finger Print Reader in Power Button available with and without ControlVault 3 Plus ControlVault 3 Plus Advanced Authentication with FIPS 140-3 Level 3 Certification Contacted Smart Card and ControlVault 3 Plus Contactless Smart Card, NFC, and ControlVault 3 Plus

Specifications of Precision 3490

Table 28. Hardware security (continued) Hardware security SED SSD NVMe, SSD, and hard drive (Opal and non-Opal) per SDL FIPS 201 Full Scan FPR and ControlVault 3 Plus

Smart-card reader

Contactless smart-card reader

This section lists the contactless smart-card reader specifications of your Precision 3490. This module is only available in computers shipped with Smart- card readers.

Table 29. Contactless smart-card reader specifications

Title

Description

Dell ControlVault 3 Plus Contactless smart-card reader with NFC

Felica Card Support

Reader and software capable of

Yes

supporting Felica contactless cards

Prox (Proximity) (125kHz) Card support Reader and software capable of

supporting Prox /Proximity/125 kHz

contactless cards

ISO 14443 Type A Card Support

Reader and software capable of

Yes

supporting ISO 14443 Type A contactless

cards

ISO 14443 Type B Card Support

Reader and software capable of

Yes

supporting ISO 14443 Type B contactless

cards

ISO/IEC 21481

Reader and software capable of

Yes

supporting ISO/IEC 21481 compliant

contactless cards and tokens

ISO/IEC 18092

Reader and software capable of

Yes

supporting ISO/IEC 21481 compliant

contactless cards and tokens

ISO 15693 Card Support

Reader and software capable of

Yes

supporting ISO15693 contactless cards

NFC Tag Support

Supports reading and processing of NFC Yes compliant tag information

NFC Reader Mode

Support for NFC Forum Defined Reader Yes mode

NFC Writer Mode

Support for NFC Forum Defined Writer Yes mode

NFC Peer-to-Peer Mode

Support for NFC Forum Defined Peer to Yes Peer mode

NFC Proximity OS Interface

Enumerates NFP (Near Field Proximity) Yes device for operating system to utilize

PC/SC operating system interface

Personal Computer/Smart Card

Yes

specification for integration of hardware

readers into personal computer

environments

Specifications of Precision 3490

Table 29. Contactless smart-card reader specifications (continued)

Title CCID driver compliance

Description
Common driver support for Integrated Circuit Card Interface Device for operating system level drivers

Dell ControlVault 3 Plus Contactless smart-card reader with NFC
Yes

Dell ControlVault support

The device connects to Dell ControlVault Yes for usage and processing

NOTE: 125 KHz proximity cards are not supported.

Table 30. Contactless card types supported

Interface

Card type

NFC Forum (Microsoft Proximity Device)

Type 1 tag Type 2 tag

Type 3 tag

Type 4 tag

Type 5 tag

P2P

RFID (Microsoft Smartcard Device)

ISO14443A

ISO14443B

Sony FeliCa Legacy iClass (ISO15693) Mifare Classic Low Frequency (125 KHz )

Supported functionality Read/Write NDEF Read/Write NDEF Read/Write NDEF Read/Write NDEF Read/Write NDEF Exchange NDEF Read UUID and APDU Exchange (ISO7816) Read UUID and APDU Exchange (ISO7816) Read UUID only Read UUID only Read UUID only Not supported

Table 31. Supported cards Manufacturer HID

Card jCOP readertest3 A card (14443a) 1430 1L DESFire D8H DESFIRE 4K Standard – 1450NGGNN iClass 16K/16 – 2002PGGMN iClass SR 16K/16 – 2002HPGGMN iCLASS 2K tag iCLASS GP – 2003 PGGMN iClass Clamshell – 2080PMSMV iClass Prox 16K/16 – 2022BGGMNN Mifare M1P 1430 NGGNN iclass Prox 2020BGGMNM DesFire D8P 1456CSGMN

Specifications of Precision 3490

Table 31. Supported cards (continued) Manufacturer

NXP/Mifare

G&D

Oberthur
Gemalto Sony
PIVKey

Specifications of Precision 3490

Card iCLASS MIFARE Px GM49Y 2623BNPGGBNAB iCLASS MIFARE Px 8M1L iClass SEOS JW 5006PGGMN Crescendo iCLASS Px G8H iCLASS Seos IY SEOS JMC4 J1Y 5806VNG1NNN4 SEOS Key FOB 5266PNNA SEOS Clamshell 5656PMSAV SEOS + Prox 5106RGGMNN SEOS + DESFire 5906PNG1ANN7 SEOS iClass 5006PGGMN7 Seos Essential + Prox 551PPGGANN iCLASS 2K 2000PGGMN iCLASS 2K 3000PGGMN MIFARE DESFire 3700CPGGAN iCLASS DP DESFire 1Y Mifare DESFire 8K White PVC card Mifare Classic 1K White PVC card NXP Mifare Classic S50 ISO card Mifare DESFire 2K Mifare Plus S 2K/4K Mifare Plus X 4K idOnDemand – SCE3.2 144K SCE6.0 FIPS 80K Dual + 1K Mifare SCE6.0 nonFIPS 80K Dual + 1K Mifare SCE6.0 FIPS 144K Dual + 1K Mifare SCE6.0 nonFIPS 144K Dual + 1K Mifare SCE7.0 FIPS 144K idOnDemand – OCS5.2 80K ID-One Cosmo 64 RSA D V5.4 T = 0 card ID-One Cosmo 128K V5.5 card TOP DL GX4 144K card Felica RC-S962 Felica RC-S965 Felica RC-S966 C910 PKI

Table 31. Supported cards (continued) Manufacturer NIST IDENTIV
Transport cards

Card PIV1 PIV programmed cards uTrust Oyster (London) MIFARE DESFire T-Money (Korea) Octopus Card (Hong Kong) SUICA (Japan)

Table 32. Qualified NFC tags

NFC tag

Supported

Tap and do – NFC Forum Type 1 Tag – Topaz 512

Yes

(BCM920203)

Tap and do – NFC Forum Type 1 Tag – Topaz 512

Yes

(BCM20203T512)

Tap and do – NFC Forum Type 1 Tag – Topaz (BCM20203T96) Yes

Tap and do – NFC Forum Type 2 Tag – Mifare UltraLight

Yes

Tap and do – NFC Forum Type 2 Tag – Mifare UltraLight C

Yes

Tap and do – NFC Forum Type 2 Tag – NTAG203

Yes

Tap and do – NFC Forum Type 3 Tag – FeliCa Lite RC-S965 Yes

Tap and do – NFC Forum Type 3 Tag – FeliCa RC-S962

Yes

Tap and do – NFC Forum Type 4 Tag – Mifare DESFire

Yes

EV1Card 2K

Tap and do – NFC Forum Type 4 Tag – Mifare DESFire

Yes

EV1Card 4K

Tap and do – NFC Forum Type 4 Tag – Mifare DESFire

Yes

EV1Card 8K

Tap and do – ISO 15693 – Tag-it Plus

Yes

HID I-code ISO card

Yes

Contacted smart-card reader

The following table lists the contacted smart-card reader specifications of your Precision 3490.

Table 33. Contacted smart-card reader specifications

Title

Description

Dell ControlVault 3 Plus Contacted smart-card reader

ISO 7816-3 Class A Card Support

Reader capable of reading 5 V powered Yes smart card

ISO 7816-3 Class B Card Support

Reader capable of reading 3 V powered Yes smart card

ISO 7816-3 Class C Card support

Reader capable of reading 1.8 V powered Yes smart card

Specifications of Precision 3490

Table 33. Contacted smart-card reader specifications (continued)

Title T = 0 support

Description
Cards support character level transmission

Dell ControlVault 3 Plus Contacted smart-card reader
Yes

T = 1 support

Cards support block level transmission Yes

EMVCo Certified

Formally certified based on EMVCo

Yes

smart card standards

PC/SC operating system interface

Personal Computer/Smart Card

Yes

specification for integration of hardware

readers into personal computer

environments

CCID driver compliance

Common driver support for Integrated Yes Circuit Card Interface Device for operating system level drivers

Windows Certified

Certified by the Windows Hardware

Yes

Certification program

FIPS 201 (PIV/HSPD-12) Compliant

Device compliant with FIPS 201/PIV/ Yes HSPD-12 requirements

ISO 7816-1 Compliant

Specification for the physical

Yes

characteristics of integrated circuit

cards with contacts

ISO 7816-2 Compliant

Specification for the dimensions and

Yes

location of the contacts

ISO 7816-3 Compliant

Specification for electrical interface and Yes transmission protocols

ISO 7816-4 Compliant

Specification for organization, security Yes and commands for interchange

Dell ControlVault support

Device connects to Dell ControlVault for Yes usage and processing

Operating and storage environment

This table lists the operating and storage specifications of your Precision 3490. Airborne contaminant level: G1 as defined by ISA-S71.04-1985

Table 34. Computer environment Description Temperature range

Operating 0°C to 35°C (32°F to 95°F)

Relative humidity (maximum) Vibration (maximum)*

10% to 90% (non-condensing) 0.66 GRMS

Shock (maximum)

110 G

Altitude range

-15.2 m to 3048 m (-49.87 ft to 10,000 ft)

Storage -40°C to 65°C (-40°F to 149°F) 0% to 95% (non-condensing) 1.30 GRMS 160 G -15.2 m to 10,668 m (-49.87 ft to 35,000 ft)

CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components.

Specifications of Precision 3490

Measured using a random vibration spectrum that simulates the user environment. Measured using a 2 ms half-sine pulse.
Dell support policy
For information about Dell support policy, search in the Knowledge Base Resource at www.dell.com/support.
ComfortView Plus
WARNING: Prolonged exposure to blue light from the display may lead to long- term effects such as eye strain, eye fatigue, or damage to the eyes. Blue light is a color in the light spectrum which has a short wavelength and high energy. Chronic exposure to blue light, particularly from digital sources, may disrupt sleep patterns and cause long-term effects such as eye strain, eye fatigue, or damage to the eyes. The display on this computer is designed to minimize blue light and complies with TÜV Rheinland’s requirement for low blue light displays. Low blue light mode is enabled at the factory, so no further configuration is necessary. To reduce the risk of eye strain, it is also recommended that you: Position the display at a comfortable viewing distance between 20 and 28 inches (50 cm and 70 cm) from your eyes. Blink frequently to moisten your eyes, wet your eyes with water, or apply suitable eye drops. Look away from your display, and gaze at a distant object at 20 ft (609.60 cm) away for at least 20 seconds during each break. Take an extended break for 20 minutes every two hours.
Using the privacy shutter
1. Slide the privacy shutter to the left to access the camera lens. 2. Slide the privacy shutter to the right to cover the camera lens.

Specifications of Precision 3490

Figure 8. Camera shutter
Dell Optimizer
This section provides the Dell Optimizer specifications of your Precision 3490.
On Precision 3490 with Dell Optimizer, the following features are supported: ExpressConnect–Automatically joins the access point with the strongest signal, and directs bandwidth to conferencing
applications when in use. ExpressSign-in–The Intel Context Sensing Technology’s proximity sensor detects your presence to instantly wake up the
computer and login using the IR camera and Windows Hello feature. Windows locks when you walk away. ExpressResponse–Prioritizes the most important applications. Applications open faster and perform better. ExpressCharge–Extends the battery runtime and improves battery performance by adapting to your patterns. Intelligent Audio–Collaborate like you’re in the same room. Intelligent Audio enhances your audio quality and reduces
background noises, so you can hear and be heard, creating a better conference experience for all.
For more information about configuring and using these features, see Dell Optimizer User Guide.

Specifications of Precision 3490

Working inside your computer

Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure in this document assumes that you have read the safety information that shipped with your computer.
WARNING: Before working inside your computer, read the safety information that is shipped with your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/ regulatory_compliance. WARNING: Disconnect your computer from all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, panels, and screws before connecting your computer to an electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.
CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the pins and the contacts. CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance. CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity which could harm internal components. CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables have connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable. When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connecting cables, ensure that the ports and the connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
CAUTION: Exercise caution when handling rechargeable Li-ion batteries in laptops. Swollen batteries should not be used and should be replaced and disposed properly.
NOTE: The color of your computer and certain components may differ from what is shown in this document.
Before working inside your computer
Steps 1. Save and close all open files and exit all open applications. 2. Shut down your computer. For Windows operating system, click Start > Power > Shut down.
NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down instructions.
3. Disconnect your computer and all attached devices from their electrical outlets. 4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer.

Working inside your computer

5. Remove any media card and optical disk from your computer, if applicable. 6. Enter the service mode, if you can turn on your computer.
Service Mode Service Mode is used to cut off power, without disconnecting the battery cable from the system board prior to conducting repairs in the computer.
CAUTION: If you are unable to turn on the computer to put it into Service Mode, or the computer does not support Service Mode, proceed to disconnect the battery cable. To disconnect the battery cable, follow the steps in Removing the battery.
NOTE: Ensure that your computer is shut down and the AC adapter is disconnected.
a. Hold the key on the keyboard and press the power button for 3 seconds or until the Dell logo appears on the screen. b. Press any key to continue. c. If the AC adapter is not disconnected, a message prompting you to remove the AC adapter appears on the screen.
Remove the AC adapter and then press any key to continue the Service Mode process. The Service Mode process automatically skips the following step if the Owner Tag of the computer is not set up in advance by the user. d. When the ready-to-proceed message appears on the screen, press any key to proceed. The computer emits three short beeps and shuts down immediately. e. Once the computer shuts down, it has successfully entered Service Mode.
NOTE: If you are unable to turn on your computer or unable to enter Service Mode, skip this process.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions. Observe the following safety precautions before you perform any installation or break-fix procedures involving disassembly or reassembly: Turn off the computer and all attached peripherals. Disconnect the computer and all attached peripherals from AC power. Disconnect all network cables, telephone, and telecommunications lines from the computer. Use an ESD field service kit when working inside any notebook to avoid electrostatic discharge (ESD) damage. After removing any computer component, carefully place the removed component on an anti-static mat. Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted. Unplugging, pressing, and holding the power button for 15 seconds should discharge residual power in the system board.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are powered while turned off. The internal power enables the computer to be remotely turned on (Wake-on-LAN) and suspended into a sleep mode and has other advanced power management features.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done by using a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a painted or nonmetal surface. The wrist strap should be secure and in full contact with your skin, and ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge–ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards, processors, memory modules, and system boards. Slight charges can damage circuits in ways that may not be obvious, such as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased density, ESD protection is an increasing concern.

38

Working inside your computer

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.
Two recognized types of ESD damage are catastrophic and intermittent failures. Catastrophic Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes an
immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has received a static shock and immediately generates a “No POST/No Video” symptom with a beep code that is emitted for missing or nonfunctional memory. Intermittent Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms that are related to the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory integrity, intermittent memory errors, and so on.
The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or “walking wounded”) failure.
Perform the following steps to prevent ESD damage: Use a wired ESD wrist strap that is properly grounded. Wireless anti-static straps do not provide adequate protection.
Touching the chassis before handling parts does not ensure adequate ESD protection on parts with increased sensitivity to ESD damage. Handle all static-sensitive components in a static-safe area. If possible, use anti- static floor pads and workbench pads. When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti- static packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you discharge static electricity from your body. Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD Field Service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components: anti-static 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. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal on the computer being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the computer, or inside an ESD bag. Wrist Strap and Bonding Wire The wrist strap and bonding wire can be either directly connected between your wrist and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is recommended to test the wrist strap and bonding wire at least once per week. ESD Wrist Strap Tester The wires inside an ESD strap are prone to damage over time. When using an unmonitored kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your regional office to find out if they have one. To perform the test, plug the bonding-wire of wrist-strap into the tester while it is strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm sounds if the test fails. Insulator Elements It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are insulators and often highly charged. Working Environment Before deploying the ESD Field Service kit, assess the situation at the customer location. For example, deploying the kit for a server environment is different than for a desktop or laptop environment. Servers are typically installed in a rack within a data center; desktops or laptops are typically placed on office desks or cubicles. Always look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to accommodate the type of computer that is being repaired. The workspace should also be free of insulators that can cause an ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or 30 centimeters away from sensitive parts before physically handling any hardware components.

Working inside your computer

39

ESD Packaging All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is shielded. Always place parts in your hand, on the ESD mat, in the computer, or inside an anti-static bag.
Transporting Sensitive Components When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
ESD protection summary
It is recommended to always use the traditional wired ESD grounding wrist strap and protective anti-static mat when servicing Dell products. In addition, it is critical to keep sensitive parts separate from all insulator parts while performing service and use anti-static bags for transporting sensitive components.
Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
After working inside your computer
About this task
CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.
Steps 1. Replace all screws and ensure that no stray screws remain inside your computer. 2. Connect any external devices, peripherals, or cables you removed before working on your computer. 3. Replace any media cards, discs, or any other parts that you removed before working on your computer. 4. Connect your computer and all attached devices to their electrical outlets.
NOTE: To exit service mode, ensure to connect the AC adapter to the power- adapter port on your computer.
5. Press the power button to turn on the computer. Your computer will automatically return to normal functioning mode.
BitLocker
CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress, and the system will ask for the recovery key on each reboot. If the recovery key is not known, this can result in data loss or an unnecessary operating system reinstall. For more information about this subject, see Knowledge Article: updating the BIOS on Dell systems with BitLocker enabled. The installation of the following components triggers BitLocker: Hard disk drive or solid-state drive System board
Recommended tools
The procedures in this document may require the following tools: Phillips screwdriver #0 Phillips screwdriver #1 Plastic scribe

40

Working inside your computer

Screw list

NOTE: When removing screws from a component, it is recommended to note the screw type, and the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.
NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surfaces when replacing a component.
NOTE: Screw color may vary with the configuration ordered.

Table 35. Screw list Component M.2 2230 solid-state drive thermal shield
WWAN card

Screw type M2x3
M2x3

Quantity 2
1

Screw image

Fan

M2x5

2

Assembly inner frame

M2x3

8

Smart card reader

M2x2.5

3

Power-button board

M2x2.5

2

Keyboard bracket

M2x2

17

Keyboard

M2x2

4

Fingerprint reader bracket

M2x3

1

Display cable bracket

M2x3

2

System board

M2x4

3

USB Type-C bracket

M2x5

3

Left and right display hinges

M2.5×5

4

(secured to palm-rest assembly)

Display panel

M2.5×3

2

Display hinges (secured to

M2.5×3

4

display back cover)

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Major components of Precision 3490
The following image shows the major components of Precision 3490.

Figure 9. Major components of your computer
1. Base cover 2. 4G WWAN card bracket 3. 4G WWAN card 4. Heat sink 5. System board 6. Battery

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7. Assembly inner frame 8. Smart card reader 9. Palm-rest assembly 10. Touchpad 11. Speakers 12. Display assembly 13. Coin-cell battery 14. Memory module 15. Fan 16. Solid-state drive 17. Solid-state drive thermal shield 18. Wireless card 19. Power-button board
NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for purchase options.

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5

Removing and installing Customer Replaceable Units (CRUs)

The replaceable components in this chapter are Customer Replaceable Units (CRUs). CAUTION: Customers can replace only the Customer Replaceable Units (CRUs) following the safety precautions and replacement procedures. NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
SIM card tray
Removing the SIM card tray
Prerequisites 1. Follow the procedure in Before working inside your computer.
About this task The following images indicate the location of the SIM card tray and provide a visual representation of the removal procedure. This procedure is applicable to computers shipped with WWAN card only.

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Figure 10. Removing the SIM card tray
Steps 1. Insert a pin into the release hole of the SIM card tray. 2. Push the pin to release the lock, and eject the SIM card tray. 3. Slide the SIM card tray out of the slot on the computer. 4. Remove the SIM card from the SIM card tray. 5. Slide and push the empty SIM card tray back into the slot.
Installing the SIM card tray
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 SIM card tray and provide a visual representation of the installation procedure. This procedure is applicable to computers shipped with WWAN card only.

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Figure 11. Installing the SIM card tray
Steps 1. Insert a pin into the release hole to release the SIM card tray. 2. Push the pin to release the lock, and eject the SIM card tray. 3. Slide the SIM card tray out of the slot on the computer. 4. Align and place the SIM card in the dedicated slot on the SIM card tray. 5. Slide the SIM card tray into the slot in the computer, and push it to lock in place.
Next steps 1. Follow the procedure in After working inside your computer.
Base cover
Removing the base cover
Prerequisites 1. Follow the procedure in Before working inside your computer.
NOTE: Ensure that your computer is in Service Mode. For more information, see Before working inside your computer.

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CAUTION: If your computer is unable to enter Service Mode, disconnect the battery cable from the system board. 2. Remove the nanoSIM card.
About this task NOTE: Before removing the base cover, ensure that there is no smart card installed in the smart card slot on your computer.
The following images indicate the location of the base cover and provide a visual representation of the removal procedure.

Figure 12. Removing the base cover
Steps 1. Loosen the eight captive screws that secure the base cover to the palm-rest assembly. 2. Starting from the top edge, use a plastic scribe to pry the base cover and release it from all sides of the palm rest assembly.

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3. Lift the base cover off the palm-rest assembly. NOTE: Ensure that your computer is in Service Mode. If your computer is unable to enter Service Mode, disconnect the battery cable from the system board. To disconnect the battery cable, follow step 4 to step 5.
4. Using the pull tab, disconnect the battery cable from the connector (BATTERY) on the system board. 5. Press and hold the power button for five seconds to ground the computer and drain the flea power.
Installing the base cover
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 base cover and provide a visual representation of the installation procedure.

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Figure 13. Installing the base cover
NOTE: If the battery is not a pre-requisite and if you have disconnected the battery cable, ensure to connect the battery cable.
Steps 1. Connect the battery cable to the connector (BATTERY) on the system board. 2. Align and place the base cover into slots on the palm-rest assembly. 3. Tighten the eight captive screws that secure the base cover to the palm- rest assembly.
Next steps 1. Install the nanoSIM card. 2. Follow the procedure in After working inside your computer.

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NOTE: Ensure that your computer is in Service Mode. For more information, see Before working inside your computer.
Memory modules
Removing the memory module
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.
About this task The following image indicates the location of the memory module and provides a visual representation of the removal procedure.

Figure 14. Removing the memory module
Steps 1. Using your fingertips, spread apart the securing clips on the memory- module slot until the memory module pops up. 2. Slide and remove the memory module from the memory-module slot on the system board.
NOTE: Repeat step 1 and step 2 if there is more than one memory module installed on your computer.
Installing the memory module
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the memory module and provides a visual representation of the installation procedure.

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Figure 15. Installing the memory module
Steps 1. Align the notch on the memory module with the tab on the memory- module slot. 2. Slide the memory module firmly into the slot at an angle and press the memory module down until it clicks into place.
NOTE: If you do not hear the click, remove the memory module and reinstall it.
Next steps 1. Install the base cover. 2. Install the nanoSIM card. 3. Follow the procedure in After working inside your computer.
Solid-state drive
Removing the M.2 2230 solid-state drive
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.
About this task The following image indicates the location of the M.2 2230 solid-state drive and provides a visual representation of the removal procedure.

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Figure 16. Removing the M.2 2230 solid-state drive
Steps 1. Remove the two screws (M2x3) that secure the solid-state drive thermal shield to the palm-rest assembly. 2. Slide and lift the solid-state drive thermal shield off the palm-rest assembly. 3. Slide and lift the M.2 2230 solid-state drive off the solid-state drive slot (SSD).
Installing the M.2 2230 solid-state drive
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following images indicate the location of the M.2 2230 solid-state drive and provide a visual representation of the installation procedure.

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Figure 17. Installing the M.2 2230 solid-state drive
Steps 1. Align the notch on the solid-state drive with the tab on the solid- state drive slot (SSD). 2. Slide the solid-state drive into the solid-state drive slot (SSD). 3. Insert the tab on the thermal shield into the recess on the inner frame. 4. Align the screw holes on the solid-state drive thermal shield with the screw hole on the solid-state drive and palm-rest
assembly. 5. Replace the two screws (M2x3) that secure the M.2 2230 solid- state drive thermal shield to the solid-state drive and
palm-rest assembly.
Next steps 1. Install the base cover. 2. Install the nanoSIM card. 3. Follow the procedure in After working inside your computer.
Wireless card
Removing the wireless card
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.
About this task The following image indicates the location of the wireless card and provides a visual representation of the removal procedure.

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Figure 18. Removing the wireless card
Steps 1. Loosen the captive screw that secures the wireless-card bracket to the wireless card and system board. 2. Lift the wireless-card bracket off the wireless card. 3. Disconnect the antenna cables from the wireless card. 4. Peel the wireless card from the adhesive pad and remove the wireless card off the wireless-card slot (WLAN).
Installing the wireless card
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the wireless card and provides a visual representation of the installation procedure.

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Figure 19. Installing the wireless card

Steps 1. Connect the antenna cables to the wireless card.
The following table provides the antenna-cable color scheme for the wireless card that is supported by your computer.

Table 36. Antenna-cable color scheme

Connectors on the wireless card

Antenna-cable color

Main

White

Auxiliary

Black

Silkscreen marking
MAIN AUX

(white triangle) (black triangle)

2. Align the notch on the wireless card with the tab on the wireless-card slot (WLAN). 3. Insert the wireless card into the slot at an angle and adhere the wireless card to the adhesive pad on the system board. 4. Align the screw hole on the wireless-card bracket with the screw hole on the wireless card and system board. 5. Tighten the captive screw that secures the wireless-card bracket to the wireless card and the system board.

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Next steps 1. Install the base cover. 2. Install the nanoSIM card. 3. Follow the procedure in After working inside your computer.
Wireless Wide Area Network (WWAN) card
Removing the WWAN card
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.
About this task NOTE: The WWAN card is available only on certain configurations.
The following images indicate the location of the WWAN card and provide a visual representation of the removal procedure.

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Figure 20. Removing the WWAN card – For computers shipped with 4G card

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57

Figure 21. Removing the WWAN card – For computers shipped with 5G card
Steps 1. Using a plastic scribe, pry the WWAN-card shield from the right side recess to release it from the frame that accommodates
the WWAN card. 2. Lift the WWAN-card shield off the frame. 3. Remove the screw (M2x3) that secures the WWAN-card bracket to the WWAN card and palm-rest assembly. 4. Lift the WWAN-card bracket off the WWAN card and palm-rest assembly. 5. Disconnect the antenna cables from the WWAN card. 6. Slide and remove the WWAN card from the WWAN-card slot on the system board.
Installing the WWAN card
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: The WWAN card is available only on certain configurations.

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The following images indicate the location of the WWAN card and provide a visual representation of the installation procedure.

Figure 22. Installing the WWAN card – For computers shipped with 4G card

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Figure 23. Installing the WWAN card – For computers shipped with 5G card

Steps 1. Connect the antenna cables to the WWAN card.
The following table provides the antenna-cable color scheme for the WWAN card that is supported by your computer.

Table 37. Antenna-cable color scheme for 4G WWAN card

Connectors on the WWAN Antenna-cable color card

Silkscreen marking

Main

White and gray

MAIN 5

Auxiliary

Black and gray

6 AUX

(white triangle) (black triangle)

Table 38. Antenna-cable color scheme for 5G WWAN card

Connectors on the WWAN card

Antenna-cable color

M

White and gray

M1

Orange

M2

Blue

Silkscreen marking ANT0 M ANT1 M1 ANT2 M2

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Table 38. Antenna-cable color scheme for 5G WWAN card (continued)

Connectors on the WWAN card D/G

Antenna-cable color Black

Silkscreen marking ANT3 D/G

2. Align the notch on the WWAN card with the tab on the WWAN-card slot (WWAN). 3. Insert the WWAN card into the slot at an angle. 4. Adhere the WWAN card to the adhesive pad on the system board.
NOTE: Adhesive pad is applicable only for computers shipped with a 5G WWAN card.
5. Align the screw hole on the WWAN-card bracket with the screw hole on the WWAN card and palm-rest assembly. 6. Replace the screw (M2x3) that secures the wireless-card bracket to the wireless card and the palm-rest assembly. 7. Align and connect the WWAN-card shield to the frame that accommodates the WWAN card.

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

Fan

Removing the fan
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the coin-cell battery.
About this task The following image indicates the location of the fan and provides a visual representation of the removal procedure.

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Figure 24. Removing the fan
Steps 1. Disconnect the fan cable from the connector (JFAN1) on the system board. 2. Peel the tape that secures the fan to the heat sink. 3. Remove the two screws (M2x5) that secure the fan to the palm-rest assembly. 4. Lift the fan off the palm-rest assembly.
Installing the fan
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the fan and provides a visual representation of the installation procedure.

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Figure 25. Installing the fan
Steps 1. Align the screw holes on the fan with the screw holes on the palm- rest assembly. 2. Replace the two screws (M2x5) that secure the fan to the palm-rest assembly. 3. Adhere the tape that secures the fan to the heat sink. 4. Connect the fan cable to the connector (JFAN1) on the system board.
Next steps 1. Install the base cover. 2. Install the nanoSIM card. 3. Install the coin-cell battery. 4. Follow the procedure in After working inside your computer.

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6

Removing and installing Field Replaceable Units (FRUs)

The replaceable components in this chapter are Field Replaceable Units (FRUs). CAUTION: The information in this removing and installing FRU’s section is intended for authorized service technicians only. CAUTION: To avoid any potential damage to the component or loss of data, ensure that an authorized service technician replaces the Field Replaceable Units (FRUs). CAUTION: Dell Technologies recommends that this set of repairs, if needed, to be conducted by trained technical repair specialists. CAUTION: As a reminder, your warranty does not cover damages that may occur during FRU repairs that are not authorized by Dell Technologies.
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Battery
Rechargeable Li-ion battery precautions
CAUTION: Exercise caution when handling rechargeable Li-ion batteries. Discharge the battery completely before removing it. Disconnect the AC power adapter from the computer
and operate the computer solely on battery power–the battery is fully discharged when the computer no longer turns on when the power button is pressed. Do not crush, drop, mutilate, or penetrate the battery with foreign objects. Do not expose the battery to high temperatures, or disassemble battery packs and cells. Do not apply pressure to the surface of the battery. Do not bend the battery. Do not use tools of any kind to pry on or against the battery. Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental puncture or damage to the battery and other computer components. 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 rechargeable Li-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell. Always purchase genuine batteries from www.dell.com or authorized Dell partners and resellers. Swollen batteries should not be used and should be replaced and disposed properly. For guidelines on how to handle and replace swollen rechargeable Li-ion batteries, see Handling swollen rechargeable Li- ion batteries.
Removing the battery
CAUTION: The information in this removal section is intended for authorized service technicians only.

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Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.
About this task The following image indicates the location of the battery and provides a visual representation of the removal procedure.

Figure 26. Removing the battery
Steps 1. Disconnect the battery cable from the connector (BATTERY) on the system board (if not disconnected earlier). 2. Loosen the five captive screws that secure the battery to the palm-rest assembly. 3. Lift the battery off the palm-rest assembly. 4. Turn the battery over and peel the tape that secures the battery cable to the battery. 5. Remove the battery cable from the routing guides on the battery. 6. Disconnect the battery cable from the connector on the battery.

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Installing the battery
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the battery and provides a visual representation of the installation procedure.

Figure 27. Installing the battery
Steps 1. Align and route the battery cable through the routing guides on the battery. 2. Adhere the tape that secures the battery cable to the battery. 3. Connect the battery cable to the connector on the battery. 4. Turn the battery over. 5. Align the screw holes on the battery with the screw holes on the palm-rest assembly.

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6. Tighten the five captive screws that secure the battery to the palm-rest assembly. 7. Connect the battery cable to the connector (BATTERY) on the system board.
Next steps 1. Install the base cover. 2. Install the nanoSIM card. 3. Follow the procedure in After working inside your computer.
Coin-cell battery
Removing the coin-cell battery
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.
About this task WARNING: Removing the coin-cell battery resets the BIOS setup program’s settings to default. It is recommended that you note the BIOS setup program’s settings before removing the coin-cell battery.
The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure.

Figure 28. Removing the coin-cell battery
Steps 1. Disconnect the coin-cell battery cable from the connector (JRTC1) on the system board.

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67

2. Remove the coin-cell battery cable from the routing guide on the fan. 3. Peel the coin-cell battery and lift it along with its cable from the system board.
Installing the coin-cell battery
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the coin-cell battery and provides a visual representation of the installation procedure.

Figure 29. Installing the coin-cell battery
Steps 1. Adhere the coin-cell battery to the coin-cell battery label (RTC BTTY or RTC BATTERY) on the system board. 2. Route the coin-cell battery cable through the routing guide on the fan. 3. Connect the coin-cell battery cable to the connector (JRTC1) on the system board.
Next steps 1. Install the base cover. 2. Install the nanoSIM card. 3. Follow the procedure in After working inside your computer.

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Heat sink
Removing the heat sink – for computers shipped with integrated graphics card
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the WWAN card.
About this task NOTE: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it. NOTE: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink. The oils in your skin can reduce the heat transfer capability of the thermal grease.
The following images indicate the location of the heat sink and provide a visual representation of the removal procedure.

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69

Figure 30. Removing the heat sink – For computers shipped with 4G card

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Removing and installing Field Replaceable Units (FRUs)

Figure 31. Removing the power shielding cover – For computers shipped with H28 UMA system board

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71

Figure 32. Removing the heat sink – For computers shipped with 5G card
Steps 1. Using a plastic scribe, pry and remove the power shielding cover.
NOTE: Remove the power shielding cover only on computers shipped with H28 UMA system board. 2. Peel the WWAN antenna cables and remove the cables from the routing guides on the heat sink. 3. Loosen the four captive screws in the reverse sequential order mentioned on the heat sink [4 > 3 > 2 > 1].
NOTE: The number of screws varies depending on the configuration ordered. 4. Lift the heat sink from the system board.
Installing the heat sink – for computers shipped with integrated graphics card
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.

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About this task NOTE: If either the system board or the heat sink is replaced, use the thermal grease provided in the kit to ensure that thermal conductivity is achieved.
The following images indicate the location of the heat sink and provide a visual representation of the installation procedure.

Figure 33. Installing the heat sink – For computers shipped with 4G card

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73

Figure 34. Installing the heat sink – For computers shipped with 5G card

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Removing and installing Field Replaceable Units (FRUs)

Figure 35. Installing the power shielding cover – For computers shipped with H28 UMA system board
Steps 1. Align and place the heat sink on the system board. 2. Tighten the four captive screws in the sequential order mentioned on the heat sink [1 > 2

3 > 4].
NOTE: The number of screws varies depending on the configuration ordered.
3. Route the antenna cables through the routing guides on the heat sink and adhere the tape. 4. Align and replace the power shielding cover on the system board.
NOTE: Installing the power shielding cover applies to computers shipped with H28 UMA system board.
Next steps 1. Install the WWAN card. 2. Install the base cover. 3. Install the nanoSIM card. 4. Follow the procedure in After working inside your computer.
Removing the heat sink – for computers shipped with discrete graphics card
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the WWAN card.

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About this task NOTE: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it.
NOTE: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink. The oils in your skin can reduce the heat transfer capability of the thermal grease.
The following image indicates the location of the heat sink and provides a visual representation of the removal procedure.

Figure 36. Removing the heat sink
Steps 1. Loosen the six captive screws in the reverse sequential order mentioned on the heat sink [6 > 5 > 4 > 3 > 2 > 1].
NOTE: The number of screws varies depending on the configuration ordered. 2. Lift the heat sink from the system board.
Installing the heat sink – for computers shipped with discrete graphics card
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task NOTE: If either the system board or the heat sink is replaced, use the thermal grease provided in the kit to ensure that thermal conductivity is achieved.
The following image indicates the location of the heat sink and provides a visual representation of the installation procedure.

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Figure 37. Installing the heat sink
Steps 1. Align and place the heat sink on the system board. 2. Tighten the six captive screws in the sequential order mentioned on the heat sink [1 > 2 > 3 > 4 > 5 > 6].
NOTE: The number of screws varies depending on the configuration ordered.
Next steps 1. Install the WWAN card. 2. Install the base cover. 3. Install the nanoSIM card. 4. Follow the procedure in After working inside your computer.
Speakers
Removing the speakers
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the wireless card.
About this task The following image indicates the location of the speakers and provides a visual representation of the removal procedure.

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Figure 38. Removing the speakers
Steps 1. Disconnect the speaker cable from the connector (JSPK1) on the system board. 2. Remove the white antenna cable and speaker cable from the routing guides on the palm-rest assembly and the assembly
inner frame. 3. Lift the right and left speakers, along with its cable, off the palm-rest assembly.
Installing the speakers
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following images indicate the location of the speakers and provide a visual representation of the installation procedure.

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Figure 39. Installing the speakers
Steps 1. Using the alignment posts, place the left and right speakers into their slots on the palm-rest assembly.
NOTE: Ensure that the rubber grommets are positioned correctly.

Figure 40. Seating position of the rubber grommets
2. Route the speaker cable and white antenna cable through the routing guides on the palm-rest assembly and the assembly inner frame. NOTE: The wireless card main antenna is bundled with the speakers as a module. When installing the module, first route the speaker cable along the bottom side of the palm- rest assembly, into the routing guide on the left side of the assembly inner frame, and underneath the white wireless main antenna cable. Route the white wireless main antenna cable in the cut-out and along the top side of the assembly inner frame.
3. Connect the speaker cable to the connector (JSPK1) on the system board.
Next steps 1. Install the wireless card. 2. Install the base cover.

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3. Install the nanoSIM card. 4. Follow the procedure in After working inside your computer.
Assembly-inner frame
Removing the assembly inner frame
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the battery. 5. Remove the wireless card. 6. Remove the M.2 2230 solid-state drive. 7. Remove the speakers.
About this task The following image indicates the location of the assembly inner frame and provides a visual representation of the removal procedure.

Figure 41. Removing the assembly inner frame
Steps 1. Remove the eight screws (M2x3) that secure the assembly inner frame to the palm-rest assembly. 2. Remove the assembly inner frame off the palm- rest assembly.

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Installing the assembly inner frame
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the assembly inner frame and provides a visual representation of the installation procedure.

Figure 42. Installing the assembly inner frame
Steps 1. Using the alignment posts, place the assembly inner frame on the palm-rest assembly. 2. Align the screw holes on the assembly inner frame with the screw holes on the system board and the palm-rest assembly. 3. Replace the eight screws (M2x3) that secures the assembly inner frame to palm-rest assembly.
Next steps 1. Install the speakers. 2. Install the M.2 2230 solid-state drive. 3. Install the wireless card. 4. Install the battery. 5. Install the base cover. 6. Install the nanoSIM card. 7. Follow the procedure in After working inside your computer.

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Display assembly
Removing the display assembly – for computers shipped with integrated graphics card
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the wireless card. 5. Remove the WWAN card.
About this task The following images indicate the location of the display assembly and provide a visual representation of the removal procedure.

Figure 43. Removing the display assembly – For computers shipped with 4G card

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Figure 44. Removing the display assembly – For computers shipped with 4G card

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Figure 45. Removing the display assembly – For computers shipped with 5G card

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Removing and installing Field Replaceable Units (FRUs)

Figure 46. Removing the display assembly – For computers shipped with 5G card
Steps 1. Remove the two screws (M2x3) that secure the display cable bracket to the system board. 2. Lift the display cable bracket away from the computer. 3. Using the pull tab, disconnect the display cable from the connector (JEDP1) on the system board. 4. Remove the WWAN antenna cables from the routing guides on the heat sink. 5. Remove the four screws (M2.5×5) that secure the left and right display hinges to the palm-rest assembly. 6. Carefully lift up the palm- rest assembly and move it away from the display assembly. 7. Place the display assembly on a clean, flat surface.
Installing the display assembly – for computers shipped with integrated graphics card
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following images indicate the location of the display assembly and provide a visual representation of the installation procedure.

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Figure 47. Installing the display assembly – For computers shipped with 4G card

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Removing and installing Field Replaceable Units (FRUs)

Figure 48. Installing the display assembly – For computers shipped with 4G card

Removing and installing Field Replaceable Units (FRUs)

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Figure 49. Installing the display assembly – For computers shipped with 5G card

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Removing and installing Field Replaceable Units (FRUs)

Figure 50. Installing the display assembly – For computers shipped with 5G card
Steps 1. Align the screw holes on the palm-rest assembly with the screw holes on the display hinges. 2. Replace the four screws (M2.5×5) that secure the left and right display hinges to the palm-rest assembly. 3. Carefully hold the palm-rest assembly and close it towards the display assembly. 4. Connect the display cable to the connector (JEDP1) on the system board. 5. Align the screw holes on the display cable bracket with the screw holes on the system board. 6. Replace the two screws (M2x3) that secure the display cable bracket to the system board. 7. Route the WWAN antenna cables on the routing guides on the heat sink.
Next steps 1. Install the WWAN card. 2. Install the wireless card. 3. Install the base cover. 4. Install the nanoSIM card. 5. Follow the procedure in After working inside your computer.
Removing the display assembly – for computers shipped with discrete graphics card
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover.

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4. Remove the wireless card. 5. Remove the WWAN card.
About this task The following image indicates the location of the display assembly and provides a visual representation of the removal procedure.

Figure 51. Removing the display assembly – For computers shipped with discrete graphics card
Steps 1. Remove the two screws (M2x3) that secure the display cable bracket to the system board. 2. Lift the display cable bracket away from the computer.

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Removing and installing Field Replaceable Units (FRUs)

3. Using the pull tab, disconnect the display cable from the connector (JEDP1) on the system board. 4. Disconnect the touchscreen and G-Sensor cable from the connector (JSENTS1) on the system board. 5. Disconnect the IR camera cable from the connector (JIR1) on the system board and remove the cable from the routing guide
on the system board. 6. Remove the four screws (M2.5×5) that secure the left and right display hinges to the palm-rest assembly. 7. Carefully lift up the palm-rest assembly and move it away from the display assembly. 8. Place the display assembly on a clean, flat surface.
Installing the display assembly – for computers shipped with discrete graphics card
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following images indicate the location of the display assembly and provide a visual representation of the installation procedure.

Removing and installing Field Replaceable Units (FRUs)

91

Figure 52. Installing the display assembly – For computers shipped with discrete graphics card
Steps 1. Align the screw holes on the palm-rest assembly with the screw holes on the display hinges. 2. Replace the four screws (M2.5×5) that secure the left and right display hinges to the palm-rest assembly. 3. Carefully hold the palm-rest assembly and close it towards the display assembly. 4. Connect the IR camera cable to the connector (JIR1) on the system board and route the cable through the routing guide on
the system board. 5. Connect the touchscreen and G-Sensor cable to the connector (JSENTS1) on the system board. 6. Connect the display cable to the connector (JEDP1) on the system board. 7. Align the screw holes on the display cable bracket with the screw holes on the system board.

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Removing and installing Field Replaceable Units (FRUs)

8. Replace the two screws (M2x3) that secure the display cable bracket to the system board.
Next steps 1. Install the WWAN card. 2. Install the wireless card. 3. Install the base cover. 4. Install the nanoSIM card. 5. Follow the procedure in After working inside your computer.
Display bezel
Removing the display bezel
CAUTION: The information in this removal section is intended for authorized service technicians only.
Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the nanoSIM card. 3. Remove the base cover. 4. Remove the wireless card. 5. Remove the WWAN card. 6. Remove the display assembly.
About this task The following images indicate the location of the display bezel and provide a visual representation of the removal procedure.

Figure 53. Removing the display bezel

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Steps 1. Carefully pry up the display bezel starting from the recesses on the bottom edge of the display near the left and right hinges. 2. Pry along the outside edge of the display bezel and work your way around the entire display bezel until the display bezel is
separated from the display cover. 3. Lift the display bezel from the display assembly.
Installing the display bezel
CAUTION: The information in this installation section is intended for authorized service technicians only.
Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
About this task The following image indicates the location of the display bezel and provides a visual representation of the installation procedure.

Figure 54. Installing the display bezel
Steps 1. Align the display bezel with the display back cover and antenna assembly. 2. Gently snap the display bezel into place.
Next steps 1. Install the display assembly. 2. Install the WWAN card. 3. Install the wireless card. 4. Install the base cover. 5. Install the nanoSIM card. 6. Follow the procedure

References

Microsoft Support

Dell - Dell Linux - Community Web

Microsoft Support

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DELL Technologies Precision 3490 Lightweight Workstation Owner’s Manual

DELL Technologies Precision 3490 Lightweight Workstation

Product Information

Product Usage Instructions

Frequently Asked Questions

Set up your Precision 3490

Views of Precision 3490

Specifications of Precision 3490

Working inside your computer

Removing and installing Customer Replaceable Units (CRUs)

Removing and installing Field Replaceable Units (FRUs)

References

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