Dell U4021QW User guide

Brand: Dell

Model: U4021QW

Category: TVs & monitors

Type: User guide

Model: U4021QW

Regulatory model: U4021QWt

Dell UltraSharp 40 Curved WUHD

Monitor-U4021QW

User’s Guide

NOTE: A NOTE indicates important information that helps you make

better use of your computer.

CAUTION: A CAUTION indicates potential damage to hardware or loss of

data if instructions are not followed.

WARNING: A WARNING indicates a potential for property damage,

personal injury, or death.

are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective

owners.

2020 – 12

Rev. A00

Contents

Safety instructions..............................5

About your monitor .............................6

Package contents . . . . . . . . . . . . . . . . . . . . . . . . . 6

Product features . . . . . . . . . . . . . . . . . . . . . . . . . .8

Identifying parts and controls. . . . . . . . . . . . . . . . . . .9

Front view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Back view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Monitor specifications. . . . . . . . . . . . . . . . . . . . . . 12

Resolution specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Preset display modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Speaker Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . 17

Video - Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

USB - Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Plug-and-Play . . . . . . . . . . . . . . . . . . . . . . . . . . 25

LCD monitor quality and pixel policy . . . . . . . . . . . . . . 25

Ergonomics . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Handling and moving your display. . . . . . . . . . . . . . . . 28

Maintenance guidelines . . . . . . . . . . . . . . . . . . . . . 29

Cleaning your monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Setting up the monitor..........................30

Connecting the stand . . . . . . . . . . . . . . . . . . . . . . 30

Using the tilt, swivel, and vertical extension . . . . . . . . . . 33

Contents | 3

4 | Contents

Tilt, swivel and vertical extension . . . . . . . . . . . . . . . . . . . . . .33

Connecting your monitor . . . . . . . . . . . . . . . . . . . . 34

Organizing your cables . . . . . . . . . . . . . . . . . . . . . 38

Securing your monitor using Kensington lock (optional) . . . 38

Removing the monitor stand . . . . . . . . . . . . . . . . . . 39

Wall mounting (Optional) . . . . . . . . . . . . . . . . . . . . 40

Operating the monitor ..........................41

Power on the monitor . . . . . . . . . . . . . . . . . . . . . . 41

Using the joystick control . . . . . . . . . . . . . . . . . . . . 41

Using the OSD lock function . . . . . . . . . . . . . . . . . . 43

Front-panel button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Using the On-Screen Display (OSD) Menu . . . . . . . . . . . 47

Accessing the menu system . . . . . . . . . . . . . . . . . . . . . . . . .47

OSD warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Setting the maximum resolution. . . . . . . . . . . . . . . . . . . . . . .64

Setting the KVM USB Switch . . . . . . . . . . . . . . . . . . . . . . . .65

Setting the Auto KVM . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Troubleshooting ...............................70

Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Built-in diagnostics . . . . . . . . . . . . . . . . . . . . . . . 71

Common Problems. . . . . . . . . . . . . . . . . . . . . . . . 72

Product specific problems . . . . . . . . . . . . . . . . . . . 74

Universal Serial Bus (USB) specific problems . . . . . . . . . 78

Appendix.....................................80

FCC notices (U.S. only) and other regulatory information . . . 80

Contacting Dell . . . . . . . . . . . . . . . . . . . . . . . . . 80

EU product database for energy label and product information

sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Safety instructions | 5

Safety instructions

WARNING: Use of controls, adjustments, or procedures other than those

specified in this documentation may result in exposure to shock, electrical

hazards, and/or mechanical hazards.

• Place the monitor on a solid surface and handle it carefully. The screen is fragile

and can be damaged if dropped or hit sharply.

• Always be sure that your monitor is electrically rated to operate with the AC

power available in your location.

• Keep the monitor in room temperature. Excessive cold or hot conditions can have

an adverse effect on the liquid crystal of the display.

• Do not subject the monitor to severe vibration or high impact conditions. For

example, do not place the monitor inside a car trunk.

• Unplug the monitor when it is going to be left unused for an extended period of

time.

• To avoid electric shock, do not attempt to remove any cover or touch the inside

of the monitor.

For information on safety instructions, see the Safety, Environmental, and Regulatory

Information (SERI).

6 | About your monitor

About your monitor

Package contents

Your monitor ships with the components shown in the table below. If any component is

missing, contact Dell. For more information, see Contact Dell.

NOTE: Some components may be optional and may not ship with your

monitor. Somefeatures may not be available in certain countries.

Display

Stand riser

Stand base

Power cable (varies by country)

DisplayPort cable (DisplayPort to

DisplayPort)

Super Speed USB 3.2 Gen1 A to B

upstream cable (Enables USB Ports on

the monitor)

About your monitor | 7

HDMI cable

Thunderbolt

4 (USB Type-C) Active

Cable

PremierColor

U4021QW Color Calibration Factory Report

Every Dell U4021QW is shipped incorporating pre-tuned

Standard modes (sRGB and DCl-P3) with Color and

Luminance. Uniformity is adjusted across the screen to

meet

△E2000 < 2 and 97-102% respectively. This

helps prevent signicant color inconsistencies or

inaccuracies. In addition, a tighter grey-scale tracking

on each U4021QW monitor helps enable ultrasmooth

color gradation.The factory measurement from this very

unit are shown here.

Be assured of Accurate, Precise and Consistent

Onscreen Color with every Dell Ultrasharp U4021QW.

Serial No.

Tester

Test

Equipment

CN0Y7NWNWSL0004A464L

CA-310

CA-2000S

Chroma 2326

sRGB Mode

Avg.

E2000 ≤ 2

DCI-P3 Mode

Avg.

E2000 ≤ 2

ammaGgnikcarT elacS-yerG

•Quick Setup Guide

•Safety, Environmental, and Regulatory

Information

•Factory Calibration Report

8 | About your monitor

Product features

The Dell UltraSharp U4021QW Curved monitor has an active matrix, Thin-Film

Transistor (TFT), Liquid Crystal Display (LCD), and LED backlight. The monitor features

include:

• 100.859 cm (39.7 in.) active area display (Measured diagonally) 5120 x 2160 (21:9)

resolution, plus full-screen support for lower resolutions.

• Wide viewing angles with 98% DCI-P3.

• Tilt, swivel and vertical extension adjustment capabilities.

• Built-in speakers (2 x 9 W).

• Removable pedestal stand and Video Electronics Standards Association (VESA™)

100 mm mounting holes for flexible mounting solutions.

• Ultra-thin bezel minimizes the bezel gap in multi-monitor usage, enabling easier

set up with an elegant viewing experience.

• Extensive digital connectivity with HDMI and DP helps future-proof your monitor.

• Single Thunderbolt™ 3 (90 W) to supply power to compatible notebook while

receiving video signal.

• Thunderbolt™ 3 (90 W) and RJ45 ports enable a single-cable, network-

connected experience.

• Plug and play capability if supported by your computer.

• On-Screen Display (OSD) adjustments for ease of set-up and screen

optimization.

• Power and OSD buttons lock.

• Security lock slot.

• ≤ 0.3 W in Standby Mode.

• Supports both Picture by Picture (PBP) / Picture in Picture (PIP) Select Mode.

• Allow user to switch USB KVM function in PBP mode.

• The monitor adopts Flicker-Free technology, which clears the eye visible flicker

, brings comfort viewing experience and preventing users suffer from eye strain

and fatigue.

• Premium Panel Exchange for peace of mind.

• Optimize eye comfort with a flicker-free screen minimizes hazard blue light

emission.

• The Monitor use Low Blue Light panel and compliance with TUV Rheinland

(Hardware Solution) at factory reset/default setting model.

• Decreases the level of hazard blue light emitted from the screen to make viewing

more comfortable for your eyes.

WARNING: The possible long-term effects of blue light emission from the

monitor may cause damage to the eyes, including eye fatigue or digital eye

strain.

About your monitor | 9

Identifying parts and controls

Front view

Label Description Use

1 Power LED indicator Solid white light indicates the monitor is turned

on and functioning normally. Blinking white light

indicates the monitor is in Standby Mode.

10 | About your monitor

Back view

Label Description Use

1 VESA mounting holes (100 mm

x 100 mm-behind attached

VESA cover)

Wall mount monitor using VESA-

compatible wall mount kit (100 mm x 100

mm).

2 Regulatory label Lists the regulatory approvals.

3 Stand release button Releases stand from the monitor.

4 Power On/Off button To turn the monitor on or off.

5 Joystick Use it to control the OSD menu.

For more information, see Operating the

Monitor.

6 Mac address, Barcode, serial

number, and Service Tag label

Refer to this label if you need to contact Dell

for technical support. 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.

7 Cable-management slot Use to organize cables by inserting them

through the slot.

About your monitor | 11

Bottom view

2 3 5 7 8 9 10

1 6 12

1414

Label Description Use

1 Security lock slot Secures monitor with security cable lock (sold separately).

2 Power connector Connect the power cable.

3 HDMI 1 port Connect your computer with the HDMI cable.

4 HDMI 2 port Connect your computer with the HDMI cable.

5 DisplayPort in Connect your computer with the DisplayPort cable.

6 Audio line-out port Connect speakers to playback audio through HDMI or

DisplayPort audio channels.

Only two-channel audio is supported.

NOTE: The audio line-out port does not support

headphones.

7 Thunderbolt™ 3

(90 W)/

DisplayPort

Connect to your computer using the Thunderbolt™ 4

(USB Type-C) active cable.

The Thunderbolt™ 3 (90 W) port offer the fastest

transfer rate and the alternate mode with DP 1.4 support

the maximum resolution of 5120 x 2160 at 60 Hz PD 20

V/4.5 A, 15 V/3 A, 9 V/3 A, 5 V/3 A.

NOTE: USB Type-C is not supported on Windows

versions that are prior to Windows 10.

8 USB Type-B

upstream port

Connect the USB cable that comes with your monitor to

the computer. Once this cable is connected, you can use

the USB downstream connectors on the monitor.

9,11 Super Speed USB

10 Gbps (USB 3.2

Gen2) (4)

Connect your USB device. You can use these ports

only after you have connected the USB cable from the

computer to the monitor. Port with battery icon

supports Battery Charging Rev. 1.2.

12 | About your monitor

10 RJ-45 connector Connect Internet. You can surf Internet via RJ45 only

after you have connected the USB cable (Type-A to

Type-B or Type-C to Type-C) from the computer to the

monitor.

12 Super Speed

USB 3.2 Gen2

10Gbps Type-C

downstream port

Port with icon supports 5 V/ 3 A.

Connect your USB-C device. You can use these ports

only after you have connected the USB cable (Type-A to

Type-B or Type-C to Type-C) from the computer to the

monitor.

13 Stand lock Lock the stand to the monitor using a M3 x 8 mm screw

(screw not included).

14 Built-in speakers To output the sound from audio input.

Monitor specifications

Screen type Active matrix - TFT LCD

Panel Type In-plane switching Technology

Aspect ratio 21:9

Viewable image dimensions

Diagonal 1008.59 mm (39.7 in.)

Active Area

Horizontal 929.28 mm (36.59 in.)

Vertical 392.04 mm (15.44 in.)

Area 364236.5 mm

(564.95 in.

)

Pixel pitch 0.1815 mm x 0.1815 mm

Pixel per inch (PPI) 140

Viewing angle

Horizontal 178° (typical)

Vertical 178° (typical)

Brightness 300 cd/m² (typical)

Contrast ratio 1000 to 1 (typical)

Curvature 2500R

Display screen coating Anti-glare treatment of the front polarizer (3H) hard

coating

Backlight LED

Color depth 1.07 Billion colors

About your monitor | 13

Color gamut* 98% (typical) DCI-P3

Connectivity •1 x DP1.4 (HDCP 2.2) (10-bit color @ 60 Hz)

•2 x HDMI 2.0 (HDCP 2.2) (10-bit @ 30 Hz)

•1 x Thunderbolt™ 3 (90 W) (Alternate mode with

DisplayPort 1.4, Super Speed USB 3.2 Gen2 (10 Gbps)

upstream port, Power Delivery PD up to 90 W)

•1 x USB Type-B upstream port

•1 x USB Type -C downstream (15 W), Super Speed

USB 3.2 Gen2 (10 Gbps)

•4 x Super speed USB Type-A 10 Gbps (USB 3.2 Gen2)

•1 x Super speed USB Type-A 3.2 Gen2 with BC1.2

charging capability at 2 A (max)

•1 x Analog 2.0 audio line out (3.5 mm jack)

•1 x RJ45

Border width (edge of monitor to active area)

To p

Left/Right

Bottom

11.3 mm

15.8 mm

Adjustability

Height adjustable stand 120 mm

Tilt -5° to 21°

Swivel -30° to 30°

Cable management Yes

Dell Display Manager (DDM)

Compatibility

Easy Arrange

and other key features

Security Security lock slot (cable lock sold separately)

* At panel native only, under Custom Mode preset.

Resolution specifications

Horizontal scan range 27 kHz to 133.286 kHz

Vertical scan range 24 Hz to 86 Hz

Maximum preset resolution 5120 x 2160 at 60 Hz

Video display capabilities (HDMI & DP &

Thunderbolt™ 3 (90 W) alternate mode)

480p, 560p, 720p, 1080i, 1080p

14 | About your monitor

Preset display modes

Display mode Horizontal

frequency

(kHz)

Vertical

frequency

(Hz)

Pixel

clock

(MHz)

Sync polarity

(Horizontal/

Vertical)

VESA, 720 x 400

31.50

70.00

28.30

-/+

VESA, 640 x 480

31.50

60.00

25.20

-/-

VESA, 640 x 480 37.5 0 75.00 31.50 -/-

VESA, 800 x 600

37.90

60.30

40.00

+/+

VESA, 800 x 600

46.90

75.00

49.50

+/+

VESA, 1024 x 768

48.40

60.00

65.00

-/-

VESA, 1024 x 768

60.00

75.00

78.80

+/+

VESA, 1152 x 864

67.5 0

75.00

108.00

+/+

VESA, 1280 x 800 49.70 60.00 83.50 +/+

VESA, 1280 x 1024

64.00

60.00

108.00

+/+

VESA, 1280 x 1024

80.00

75.00

135.00

+/+

VESA, 1600 x 1200

75.00

60.00

162.00

+/+

VESA, 1680 x 1050

65.29

60.00

146.25

-/+

VESA, 1920 x 1080

67.5 0

60.00

148.50

+/+

VESA, 1920 x 1200

74.04

60.00

154.00

+/-

VESA, 2048 x 1152

70.99

60.00

156.75

+/-

VESA, 2048 x 1280

78.92

60.00

174.25

+/-

VESA, 2560 x 1080

66.64

60.00

181.25

+/-

VESA, 1024 x 2160

133.24

60.00

157.75

+/-

VESA, 1280 x 2160 133.15 60.00 191.75 +/-

VESA, 2560 x 2160

133.27

60.00

362.50

+/-

VESA, 3840 x 2160

65.58

30.00

262.75

+/-

VESA, 3840 x 2160

135.00

60.00

594.00

+/-

VESA, 3840 x 2160

133.31

60.00

533.25

+/-

VESA, 4096 x 2160

65.67

30.00

279.50

+/-

VESA, 4096 x 2160 133.28 60.00 567.25 +/-

VESA, 5120 x 2160

65.72

30.00

347.00

+/-

VESA, 5120 x 2160

133.27

60.00

703.75

+/-

About your monitor | 15

Electrical specifications

Video input signals •Digital video signal for each dierential line

Per dierential line at 100 ohm impedance

•DP/HDMI/Thunderbolt™ 3 (90 W) signal

input support

Input voltage/ frequency/current 100-240 VAC / 50 or 60 Hz ± 3 Hz / 2.8 A

(maximum)

Inrush current 120 V: 42 A (Max.)

240 V: 80 A (Max.)

Power consumption 0.3 W (Off Mode)

0.3 W (Standby Mode)

41.3 W (On Mode)

240 W (Max)

44.81 W (P

)

140.86 kWh (TEC)

As defined in EU 2019/2021 and EU 2019/2013.

Max brightness and contrast setting with maximum power loading on all USB ports.

: Power consumption of On Mode as defined in Energy Star 8.0 version.

TEC: Total energy consumption in kWh as defined in Energy Star 8.0 version.

This document is informational only and reflects laboratory performance. Your product

may perform differently, depending on the software, components and peripherals

you ordered and shall have no obligation to update such information. Accordingly, the

customer should not rely upon this information in making decisions about electrical

tolerances or otherwise. No warranty as to accuracy or completeness is expressed or

implied.

NOTE: This monitor is ENERGY STAR certified.

This product qualifies for ENERGY STAR in the factory default settings which can

be restored by “Factory Reset” function in the OSD menu. Changing the factory

default settings or enabling other features may increase power consumption that

could exceed the ENERGY STAR specified limit.

16 | About your monitor

Speaker Specifications

Speaker rated power 2 x 9 W

Frequency Response 100 Hz - 20 kHz

Impedance 8 ohm

Physical characteristics

Connector type •DP connector

•HDMI connector

•Thunderbolt™ 3 (90 W) connector

•Audio line-out

•RJ45 connector

•USB Type-C downstream connector x 1

(Port with icon supports 5 V/3 A)

•Super speed USB Type-A 3.2 Gen2 downstream

port connector x 4

(Port with battery icon supports BC 1.2.)

Signal cable type •DP to DP 1.8 m cable

•HDMI 1.8 m cable

•Super Speed USB 3.2 Gen1 (A to B) 1.8 m cable

•Thunderbolt™ 4 (USB Type-C) active 1.5 m cable

Dimensions (with stand)

Height (extended) 577.3 mm (22.73 in.)

Height (compressed) 457.8 mm (18.02 in.)

Width 946.6 mm (37.27 in.)

Depth 248.0 mm (9.76 in.)

Dimensions (without stand)

Height 419.1 mm (16.50 in.)

Width 946.6 mm (37.27 in.)

Depth 59.6 mm (2.35 in.)

Stand dimensions

Height (extended) 438.3 mm (17.26 in.)

Height (compressed) 391.5 mm (15.41 in.)

About your monitor | 17

Width 334.5 mm (13.17 in.)

Depth 248.0 mm (9.76 in.)

Weight

Weight with packaging 21.6 kg (47.62 lb)

Weight with stand assembly

and cables

13.8 kg (30.42 lb)

Weight without stand assembly

(For wall mount or VESA

mount considerations - no

cables)

9.5 kg (20.94 lb)

Weight of stand assembly 4.3 kg (9.48 lb)

Environmental characteristics

Compliant Standards

•ENERGY STAR certified Monitor.

•EPEAT registered where applicable. EPEAT registration varies by country.

See www.epeat.net for registration status by country.

•TCO Certified Display.

•RoHS Compliant.

•BFR/PVC Free monitor (excluding external cables).

•Meets NFPA 99 leakage current requirements.

•Arsenic-Free glass and Mercury-Free for the panel only.

Temperature

Operating 0°C to 40°C (32°F to 104°F)

Non-operating –20°C to 60°C (–4°F to 140°F)

Humidity

Operating 10% to 80% (non-condensing)

Non-operating 5% to 90% (non-condensing)

Altitude

Operating 5,000 m (16,404 ft) (maximum)

Non-operating 12,192 m (40,000 ft) (maximum)

Thermal dissipation 818.91 BTU/hour (maximum)

140.92 BTU/hour (On Mode)

18 | About your monitor

Video - Bandwidth

Host Video Cable Resolution

USB-C

(Alt Mode DP1.2)

USB-C Gen1 Cable

5120 x 2160 @ 30 HzThunderbolt

3 Active Cable (40G)

Thunderbolt

4 Active Cable (40G)

USB-C

(Alt Mode DP1.4)

USB-C Gen2 Cable 5120 x 2160 @ 60 Hz

Thunderbolt

3 Active Cable (40G) 5120 x 2160 @ 60 Hz

Thunderbolt

4 Active Cable (40G) 5120 x 2160 @ 60 Hz

TBT3

(Alt Mode DP1.2)

Thunderbolt

3 Active Cable (40G)

5120 x 2160 @ 30 Hz

Thunderbolt

4 Active Cable (40G)

TBT3

(Alt Mode DP1.4)

Thunderbolt

3 Active Cable (40G)

5120 x 2160 @ 60 Hz

Thunderbolt

4 Active Cable (40G)

HDMI 2.0 HDMI 2.0 cable 5120 x 2160 @ 30 Hz

HDMI 1.4 HDMI 2.0 cable 3840 x 2160 @ 30 Hz

USB - Bandwidth

Host USB Upstream Cable

USB Device connected to

USB-A or C Downstream

USB-A

(5 Gbps)

A-C Cable

Supported, USB 2.0/3.2

Gen1

A-B Cable

USB-C (5 Gbps

Data Only)

USB-C Gen1/2 Cable

Supported, USB 2.0/3.2

Gen1

Thunderbolt

4 Active Cable (40G)

Thunderbolt

3 Active Cable (40G) Supported, USB 2.0 only

USB-C (Alt Mode

DP1.2)

USB-C Gen1/2 Cable

Supported, USB 2.0 onlyThunderbolt

3 Active Cable (40G)

Thunderbolt

4 Active Cable (40G)

USB-C (Alt Mode

DP1.4)

USB-C Gen1/2 Cable

Supported, USB 2.0 onlyThunderbolt

3 Active Cable (40G)

Thunderbolt

4 Active Cable (40G)

TBT3

Thunderbolt

3 Active Cable (40G)

Supported USB3.2 Gen2

Thunderbolt

4 Active Cable (40G)

About your monitor | 19

Pin assignments

DP port (in)

Pin number 20-pin side of theconnected signal cable

1 ML3(n)

2 GND

3 ML3(p)

4 ML2(n)

5 GND

6 ML2(p)

7 ML1(n)

8 GND

9 ML1(p)

10 ML0(n)

11 GND

12 ML0(p)

13 CONFIG1

14 CONFIG2

15 AUX CH (p)

16 GND

17 AUX CH (n)

18 Hot Plug Detect

19 Return

20 DP_PWR

20 | About your monitor

HDMI port

Pin number 19-pin side of theconnected signal cable

1 TMDS DATA 2+

2 TMDS DATA 2 SHIELD

3 TMDS DATA 2-

4 TMDS DATA 1+

5 TMDS DATA 1 SHIELD

6 TMDS DATA 1-

7 TMDS DATA 0+

8 TMDS DATA 0 SHIELD

9 TMDS DATA 0-

10 TMDS CLOCK+

11 TMDS CLOCK SHIELD

12 TMDS CLOCK-

13 CEC

14 Reserved (N.C. on device)

15 DDC CLOCK (SCL)

16 DDC DATA (SDA)

17 DDC/CEC Ground

18 +5 V POWER

19 HOT PLUG DETECT

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Dell U4021QW User guide

Brand: Dell

Model: U4021QW

Category: TVs & monitors

Type: User guide

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