Dell U3223QZ Manual [EN]

Service Manual - U3223QZ

Version: 01

Date: 2022/2/28

Product Announcement:

1. Important Safety Notice

This product is certificated to meet RoHS

Directive and Lead-Free produced definition.

Using approved critical components only is

recommended when the situation to replace

defective parts. Vender assumes no liability

express or implied, arising out of any unauthorized

modification of design or replacing non-RoHS

parts. Service providers assume all liability.

Qualified Repairability:

Proper service and repair is important to the safe,

reliable operation of all series products. The

service providers recommended by vender should

be aware of notices listed in this service manual in

order to minimize the risk of personal injury when

perform service procedures. Furthermore, the

! To ensure using a proper screwdriver, follow the

torque and force listed in assembly and

disassembly procedures to unscrew screws.

! Using Lead-Free solder to well mounted the

parts.

! The fusion point of Lead-Free solder requested in

the degree of 220°C.

possible existed improper repairing method may

damage equipment or products. It is recommended

that service engineers should have repairing

knowledge, experience, as well as appropriate

product training per new model before performing

the service procedures.

NOTICE:

! To avoid electrical shocks, the products should be

connected to an authorized power cord, and turn

off the master power switch each time before

removing the AC power cord.

! To prevent the product away from water or

expose in extremely high humility environment.

! To ensure the continued reliability of this

product, use only original manufacturer’s

specified parts.

! To ensure following safety repairing behavior, put

the replaced part on the components side of

PWBA, not solder side.

2. Exploded view diagram with list of items

6

7

5

2

3

1

13

4

14

8

9

10

15 16

11

12

Item Description Q'ty Remark

1
2

4 1

6 Camera Module 1

8 1

Front Trim
PCBA Touch BD
Panel
Mid Frame
PCBA USB BD

PCBA Interface BD

PCBA Power BD
ASSY Main Chassis

1
1
13

15

For EMEA Only, not for

1 7

other regions

19

10 PCBA Joystick BD 1

ASSY Rear Cover

12 1

15
16

Stand Base

Power cable

DisplayPort cable

USB 3.2 Gen2 Type A to Type C upstream cable

USB Type C Cable ( C to C)

1 11

1

13

1

14

1

1

See “NOTE”
See “NOTE”

See “NOTE”
See “NOTE”

NOTE:

For replacement of power cord, connectivity cable and external power supply (if applicable), contact Dell:

1. Go to https://www.dell.com/support.

2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right corner of the page.

3. Click Contact Us next to the country dropdown.

4. Select the appropriate service or support link based on your need.

5. Choose the method of contacting Dell that is convenient for you.

3. Wiring Connectivity Diagram

4. How to connect and disconnect power cable/ connectivity cable

WARNING: To change power cable/ connectivity cable, switch off power before unplugging the cable and replugging in required

cable.

Connecting the HDMI cable (Optional)

Connecting the DP cable

4. How to connect and disconnect power cable/ connectivity cable

Connecting the monitor for DP Multi-Stream Transport (MST)
function

Connecting the USB-C Cable (A to C)

Connecting the USB Type-C cable (C to C) (Optional)

4. How to connect and disconnect power cable/ connectivity cable

Connecting the monitor for USB-C Multi-Stream Transport
(MST) function

Connecting the monitor for RJ45 Cable (Optional)

5. Disassembly and Assembly Procedures

NOTE:

This “Disassembly and Assembly Procedures” is for EMEA only,
not for other regions. Please note that Dell will deem warranty void
if any disassembly is done on the monitors.

Tool Required:

List the type and size of the tools that would typically can be
used to disassemble the product to a point where components
and materials requiring selective treatment can be removed.

Tool Description:

- Screwdriver(Phillip head) #1

- Screwdriver(Phillip head) #2

- Penknife

- Soldering iron and absorber

4.1 Disassembly Procedures:

Remove the monitor stand base:

1. Place the monitor on a soft cloth or cushion.

S1

S1

2. Press and hold the stand-release button.

3. Lift the stand up and away from the monitor.

S4

S5

Lift the rear cover up carefully. Disconnect the

joystick key cable from the connector of the interface

board, and then remove the rear cover and put it

aside for later disassembling.

Use a Philips-head screwdriver to remove 2pcs

screw for unlocking the key board, then tear off the

tapes and release the key board.

(No.1~2 screw size=M2x2.4, Torque=0.8~1kgfxcm)

S2

S3

Use a Philips-head screwdriver to remove 4pcs

screws for unlocking mechanisms. Remove DP caps.

(No.1~4 screw size=M4x11; Torque=11± 1kgfxcm)

2

4

Wedge your fingers between rear cover and the

middle bezel on the corners of the top side of the

monitor to release the rear cover, then use one hand

to press the middle bezel, the other hand to pull up

carefully the rear cover in order of arrow preference

for unlocking mechanisms of rear cover.

3

1

S6

2

Tear off 2pcs sound-absorbing foams, then tear off

2pcs aluminum foil to uncover all the connectors.

Use a Philips-head screwdriver to release one screw

for unlocking the USB board, and disconnect the two

cables, then release the USB board from the hooks

of the middle bezel.

(No.1screw size=M3x6, Torque=4±0.5kgfxcm)

1

1

2

3

2

5. Disassembly and Assembly Procedures

1

S8

Tear off tapes of camera FFC cable, then disconnect

the cable from the connectors and remove it. Tear off

2pcs acetate tape, then disconnect the Mic wire from

the connector of the board.

Use a Philips-head screwdriver to remove 8pcs

screws for unlocking the camera unit with the middle

S9

frame, then remove it and put it aside.

(No.1~5 Screw size= M3x4.5, Torque=5±0.5kgfxcm)

2

6

2

5

3

4

S7

Disconnect the speakers’ wire from the connector of

the board, then tear off 1pcs aluminum foil. Use a

Philips-head screwdriver to remove 8pcs screws for

unlocking the two speakers, then tear off 1pcs

acetate tape and release the two speakers away

from the middle frame.

(No.1~8 screw size=M3x8; Torque=6±1kgfxcm)

2

1

3

4

7

8

6

5

S10

7

se a Philips-head screwdriver

U to remove

8

18(13+5)pcs screws for unlocking the middle bezel

with the panel,

to remove 4pcs screws for unlocking

the bracket with the panel, to remove 1pcs screws to

unlock the heat-sink

with board.

(No.1~13 screw size=M3x5, Torque=5±0.5kgfxcm;

No.14~18 screw size=M3x4.5, Torque=5±0.5kgfxcm;

No.19~23 Screw size= M3x4, Torque=5±0.5kgfxcm)

16

15

11

2

10

22

14

17

18

12

23

19

3

13

21

4

5

6

1

20

8

7

9

S11

S12

5. Disassembly and Assembly Procedures

Tear off the tape on the back of the LED cable, then

disconnect the panel lamp cable and touch FFC cable

from the connectors, and then remove the conductive

foam from the middle frame.

conductive foam

L middle bezel, and then

ift up and take away the

release the front bezel away from the middle frame.

S14

1

Put the front bezel on a protective cushion, then tear

off the black mylar tape and release LED board from

the hooks of the front bezel, then release the touch

board away from front bezel by tearing off the tape.

2

S13

Put the middle frame on a protective cushion, then

tear off 2pcs mylar, then tear off the 2pcs aluminum

foil and 2pcs rubber pads. Use a Philips-head

screwdriver to remove 2pcs screws for unlocking the

left and right Mic boards.

(No.1~2 screw size=M2x2.4, Torque=1±0.2kgfxcm)

S15

S16

Tear off acetate tape, then disconnect the EDP cable

away from the connector of the panel module.

Take away the bracket chassis module and then put

the bracket chassis module on a protective cushion.

S17

5. Disassembly and Assembly Procedures

Release the EDP cable from the hook of the bracket,

then remove the Mylar tape from the bracket.

S18

S19

Use a Philips-head screwdriver to remove

8pcs

screws for interface board and power board. Release

the panel lamp cable from the hook of the bracket.

(No.1 screw size=M4x8, Torque=7±1kgfxcm;

No.2~8 screw size=M3x7.5, Torque=7±1kgfxcm)

6

8

3

7

1

2

5

4

Remove the power board and interface board from

bracket chassis module carefully, and then

the

disconnect all of the cables.

5. Disassembly and Assembly Procedures

5.2 Assembly Procedures:
Place a bracket chassis base on a protective

S1

S2

cushion, then stick 9pcs Silicon sheets on the

positions as the picture below shown.

Take a power board and put the power board into

the bracket chassis.

S4

S5

Take a black mylar to insert the hooks of the bracket

to cover the power board, then tear off the gum

paper of the panel lamp cable, and locate the EDP

cable into the hook of the bracket.

Panel preparation: Take out 1pcs panel module from

the carton, remove the protective film by tearing off

the tapes, then examine the panel surface according

to inspection criteria of the panel. Turn over the

panel module to place the screen faced down for

later assembling.

S3

Take a interface board, connect 1pcs EDP cable and

1pcs panel lamp cable to the connectors of the

interface board, then connect the 2pcs cables of the

power board with interface board. Turn over the

interface board and locate it to the bracket. Use a

Philips-head screwdriver to tighten 8pcs screws for

locking the interface board and power board. Locate

the panel lamp cable into the hook of the bracket.

(No.1 screw size=M4x8, Torque=6±0.5kgfxcm;

No.2~8 screw size=M3x7.5, Torque=6±0.5kgfxcm)

S6

Move the bracket chassis module close to the panel

module, then connect the EDP cable to the

connector of the panel module, then paste 1pcs

acetate tape to cover the EDP connectors of the

panel.

6

8

3

7

1

2

5

4

S7

5. Disassembly and Assembly Procedures

Take 1pcs front bezel, 1pcs touch board, 1pcs LED

board and some essential wires. Locate the LED board

into the hooks of the front bezel, then paste 1pcs black

mylar to cover the LED board. Connect 1pcs FFC

cable to the connector of the touch board, then tear off

the release paper of the gum, and then paste the

touch board on the correct position of the front bezel.

S8

Take 1pcs middle frame, 2pcs Mic board(left and

right) and some essential wires. Paste 1pcs sound-

absorbing foam on the specific position of the middle

frame. Connect 2pcs Mic wires to the connectors of

the left and right Mic boards, then fix them with tapes.

Tear off the protective film of the Mic boards and

middle frames, then assemble the left and right Mic

boards with middle frame, then use a Philips-head

screwdriver to tighten 2pcs screws for locking the Mic

boards with middle frame. Paste 2pcs aluminum foil

on the specific positions. Take 2pcs rubber pads, tear

off release papers and paste the pads on the correct

positions of two Mic boards, then fix them with mylar.

(No.1~2 screw size=M2x2.4, Torque=1±0.2kgfxcm)

S9

1

Move the assembled front bezel close to the middle

frame, then thread the touch wire and LED wire

through the left and right holes of the middle frame,

then assemble the front bezel with the middle frame.

2

sound-absorbing foam

5. Disassembly and Assembly Procedures

Adjust the bracket chassis module, and then u.se a

Philips-head screwdriver to tighten 4pcs screws for

S13

locking the bracket with the panel, to tighten 1pcs

screws for locking the heat-sink

(No.1~5 Screw size= M3x4, Torque=5±0.5kgfxcm)

S10

S11

Move the middle frame with front bezel close to the

panel unit, then assemble the middle frame with the

panel module.

Paste 1pcs conductive foam on the specification

position of the middle frame as the picture below

shown. Connect the panel lamp cable to two

connectors of the panel module, then connect the

touch FFC cable to the connector of the board. Tear

off the release paper of the adhesive tape on the

back of the LED cable, then settle and fix the LED

cable on the back of the panel module.

S14

2

3

4

5

1

Take 1pcs camera unit assembled in LCM line, then

use a Philips-head screwdriver to tighten 8pcs screws

for locking the camera unit with the middle frame.

(No.1~5 Screw size= M3x4.5, Torque=5±0.5kgfxcm)

2

6

2

5

3

4

S12

conductive foam

Use a Philips-head screwdriver to tighten 18(13+5)pcs

screws for locking the middle bezel with the panel.

(No.1~13 screw size=M3x5, Torque=5±0.5kgfxcm;

No.14~18 screw size=M3x4.5, Torque=5±0.5kgfxcm)

16

15

11

2

10

4

5

6

14

17

18

12

3

13

8

7

1

9

S15

7

8

Connect the Mic wire with the connector of the board ,

then fix the Mic wire with 2pcs acetate tape as the

picture below shown. Take 1pcs FFC cable to

connect the camera unit with the assembled unit ,

then settle and fix camera cable on the back of the

panel as the picture below shown.

S16

5. Disassembly and Assembly Procedures

Take two speakers to locate into the probers of the

middle frame, then connect the two speakers wires

and fix the wire on the frame with 1pcs acetate tape.

Connect the speaker wire to the connector of board.

Use a Philips-head screwdriver to tighten 8pcs

screws for locking two speakers, then paste 1pcs

aluminum foil as the picture below shown.

(No.1~8 screw size=M3x8; Torque=6±1kgfxcm)

S17

2

1

3

4

7

8

6

5

Connect LED wire to the connector of the board,

then fix the touch FFC wire with 1pcs aluminum foil.

Take 1pcs USB board, 2pcs cables and 1pcs

conductive foam. Connect the 2pcs cables to the

connectors of the USB board, then turn over the

board and paste the conductive foam on the back of

the USB board, and then locate the USB board into

the middle frame. Use a Philips-head screwdriver to

tighten 2pcs screws for locking the USB unit with the

middle frame, then connect the two USB cables to

the connectors of interface board.

(No.1~2 screw size=M3x5, Torque=4±0.5kgfxcm)

S18

S19

1

2

Paste 2pcs aluminum foil to cover the connectors, then

paste 2pcs sound-absorbing foams on the left and right

speakers’ screws as the picture below shown.

Take 1pcs joystick key and 1pcs OSD board,

assemble the joystick key with the OSD board.

Locate the board to the correct position of the rear

cover, then use a Philips-head screwdriver to tighten

2pcs screws for locking the board with rear cover,

then paste1pcs conductive foam on the board. Tear

off the tape papers on the back of the cable, and

then fix the key cable with tapes.

(No.1~2 screw size=M2x3.3, Torque=0.9±0.1kgfxcm)

2

1

S20

5. Disassembly and Assembly Procedures

Move the assembled rear cover close to the panel

unit, then connect the joystick key cable to the

connector of interface board. Put down the rear

cover and push the rear cover on the positions

marked for mechanisms engagement.

S22

Lift up the monitor to check the gap between the

front bezel and the panel, then provide power supply

and a video signal to the monitor , then turn on the

monitor for functionality check.

S21

Use a Philips-head screwdriver to tighten 4pcs

screws for locking the rear cover with the unit. Take

a stand base close to assemble with the monitor.

(No.1~4 screw size=M4x11; Torque=11±1kgfxcm)

2

4

3

1

6. Trouble Shooting Instructions

Self-test

Your monitor provides a self-test feature that allows you to check whether your
monitor is functioning properly. If your monitor and computer are properly connected
but the monitor screen remains dark, run the monitor self-test by performing the
following steps:

1. Turn o both your computer and the monitor.

2. Unplug the video cable from the back of the computer. To ensure proper Self-Test

operation, remove all digital and the analog cables from the back of computer.

3. Turn on the monitor.

The floating dialog box should appear on-screen (against a black background), if the
monitor cannot sense a video signal and is working correctly. While in self-test mode,
the power LED remains white. Also, depending upon the selected input, one of the
dialogs shown below will continuously scroll through the screen.

No DP Cable

The display will go into Standby Mode in 4 minutes.

www.dell.com/U3223QZ

or

No USB-C Cable

The display will go into Standby Mode in 4 minutes.

www.dell.com/U3223QZ

4. This box also appears during normal system operation if the video cable

becomesdisconnected or damaged.

5. Turn o your monitor and reconnect the video cable; then turn on both your

computer and the monitor.
If your monitor screen remains blank after you use the previous procedure, check your
video controller and computer, because your monitor is functioning properly.

6. Trouble Shooting Instructions

Built-in diagnostics

Your monitor has a built-in diagnostic tool that helps you determine if the screen
abnormality you are experiencing is an inherent problem with your monitor, or with your
computer and video card.

UltraSharp 32 Monitor

Brightness/Contrast

Input Source

Color

Display

PIP/PBP

USB

Audio & Webcam

Menu

Personalize

Others

Display Info

DDC/CI On

LCD Conditioning

Firmware 12T106

Service Tag ABCDEFG

Self-Diagnostic Select √

Reset Others

Factory Reset

Select

O

ENERGY STAR

√

®

Exit

To run the built-in diagnostics:

1. Ensure that the screen is clean (no dust particles on the surface of the screen).

2. Press and hold Up or Down or Left or Right direction for four seconds until a

menu appears on the screen.

3. Using the joystick control, highlight the Diagnostics

option and press the

joystick button to start the diagnostics. A gray screen is displayed.

4. Observe if the screen has any defects or abnormalities.

5. Toggle the joystick once again until a red screen is displayed.

6. Observe if the screen has any defects or abnormalities.

7. Repeat steps 5 and 6 until the screen displays green, blue, black, and white

colors. Note any abnormalities or defects.

The test is complete when a text screen is displayed. To exit, toggle the joystick control
again.

If you do not detect any screen abnormalities upon using the built-in diagnostic tool,
the monitor is functioning properly. Check the video card and computer.

6. Trouble Shooting Instructions

Common Problems

The following table contains general information about common monitor problems you
might encounter and the possible solutions:

Common
Symptoms

No Video/
Power LED off

No Video/
Power LED on

Missing Pixels LCD screen has

Stuck-on Pixels LCD screen has

Brightness
Problems

What you
experience

No picture • Ensure that the video cable connecting

No picture or no
brightness

spots

bright spots

Picture too dim or
too bright

Possible solutions

the monitor and the computer is properly
connected and secure.

• Verify that the power outlet is functioning
properly using any other electrical equipment.

• Ensure that the power button is depressed
fully.

• Ensure that the correct input source is
selected in the Input Source menu.

• Increase brightness and contrast controls via
OSD.

• Perform monitor self-test feature check.

• Check for bent or broken pins in the video
cable connector.

• Run the built-in diagnostics.

• Ensure that the correct input source is
selected in the Input Source menu.

• Cycle power on-off.

• Pixel that is permanently off is a natural

defect
that can occur in LCD technology.

• For more information on Dell Monitor Quality

and Pixel Policy, see Dell Support site at:

https://www.dell.com/pixelguidelines.

• Cycle power On-Off.

• Pixel that is permanently off is a natural

defect
that can occur in LCD technology.

• For more information on Dell Monitor Quality

and PixelPolicy, see Dell Support site at:

https://www.dell.com/pixelguidelines.

• Reset the monitor to factory settings.

• Adjust brightness and contrast controls via
OSD.

6. Trouble Shooting Instructions

Common
Symptoms

Safety Related
Issues

Intermittent
Problems

Missing Color Picture missing

Wrong Color Picture color not

Image retention
from a static
image left on
the monitor for
a long period of
time

Mic/Webcam
does not work

What you
experience

Visible signs of
smoke or sparks

Monitor
malfunctions on
& off

color

good

Faint shadow from
the static image
displayed appears
on the screen

• USB cable
not plug in or
not select the
correct USB
source

• Not set the
monitor Mic/
webcam as the
default device

Possible solutions

• Do not perform any troubleshooting steps.

• Contact Dell immediately.

• Ensure that the video cable connecting
the monitor to the computer is connected
properly and is secure.

• Reset the monitor to factory settings.

• Perform monitor self-test feature check to
determine if the intermittent problem occurs
in self-test mode.

• Perform monitor self-test.

• Ensure that the video cable connecting
the monitor to the computer is connected
properly and is secure.

• Check for bent or broken pins in the video
cable connector.

• Change the settings of the Preset Modes
in the Color menu OSD depending on the
application.

• Adjust R/G/B value under Custom Color in
Color menu OSD.

• Change the Input Color Format to PC RGB or
YPbPr in the Color menu OSD.

• Run the built-in diagnostics.

• Set the screen to turn o after a few minutes
of screen idle time. These can be adjusted in
Windows Power Options or Mac Energy Saver
setting.

• Alternatively, use a dynamically changing
screensaver.

• Plug in the USB Cable (Type-A to Type-C or
Type-C to Type-C), and if you connect both
USB-C port, please switch the USB source in
the OSD menu.

• Select the monitor Mic/webcam as the
default in the PC side.

• Touch the Mic buttomn and make sure the
Mic mute LED is dark.

6. Trouble Shooting Instructions

Product specific problems

Problem What you

experience

Screen image is
too small

Cannot adjust
the monitor
with the
joystick control
on the rear of
the monitor

No Input Signal
when user
controls are
pressed

The picture
does not fill the
entire screen

No image
when using DP
connection to
the PC

Image is
centered on
screen, but does
not fill entire
viewing area

OSD does not
appear on the
screen

No picture, the
LED light is white

The picture
cannot fill the
height or width
of the screen

Blank screen • Verify which DP standard is your Graphics Card

Possible solutions

• Check the Aspect Ratio setting in the Display
menu OSD.

• Reset the monitor to factory settings.

• Turn o the monitor, unplug the monitor
power cable, plug it back, and then turn on the
monitor.

• Check the signal source. Ensure the computer
is not in the power saving mode by moving the
mouse or pressing any key on the keyboard.

• Check whether the signal cable is plugged
in properly. Connect the signal cable again, if
necessary.

• Reset the computer or video player.

• Due to dierent video formats (aspect ratio) of
DVDs, the monitor may display in full screen.

• Run the built-in diagnostics.

certied to. Download and install the latest
graphics card driver.

• Some DP 1.1a graphics card cannot support
DP 1.2/1.4 monitors. Go to OSD menu, under
Input Source selection, press and hold DP
select joystick key for 8 seconds to change the
monitor setting from DP 1.2 to DP 1.1a, DP 1.4 to
DP 1.1a

6. Trouble Shooting Instructions

Problem What you

experience

No image
when using
USB Type-C
connection
to computer,
laptop, and so
on

No charging
when using
USB Type-C
connection
to computer,
laptop, and so
on

Intermittent
charging
when using
USB Type-C
connection to
computer,

laptop, and so
on

No image when
using USB
Type-C MST

No network
connection

Blank screen • Verify if the USB Type-C interface of the device

No charging • Verify if the device can support one of 5 V/9

Intermittent
charging

Blank screen or

2nd DUT is not
Prime mode

Network
dropped or
Intermittent

Possible solutions

can support DP alternate mode.

• Verify if the device required more than 90 W
power charging.

• USB Type-C interface of device cannot support
DP alternate mode.

• Set Windows to Projection mode.

• Ensure that the USB Type-C cable is not
damaged.

V/15 V/20 V charging proles.

• Verify if the Notebook requires a >90 W power
adaptor.

• If the Notebook requires a >90 W power
adaptor, it may not charge with the USB Type-C
connection.

• Ensure that you use only Dell approved adapter
or the adapter that comes with the product.

• Ensure that the USB Type-C cable is not
damaged.

• Check if the maximum power consumption of
device is over 90 W.

• Ensure that you use only Dell approved adapter
or the adapter that comes with the product.

• Ensure that the USB Type-C cable is not
damaged.

• USB Type-C input, Go to OSD menu, under
Display Info check the Link Rate is HBR2 or
HBR3, if Link Rate is HBR2, suggest to use USB
Type-C to DP cable to turn on MST.

• Do not toggle O/On the power button when
network is connected, keeps the power button
On.

6. Trouble Shooting Instructions

Problem What you

experience

The LAN port is
not functioning

OS setting or
cable connection
issue

Monitor
buttons (Mute
/ Volume down
/ Volume up /
Hookswitch)
not working
with Microsoft

®

Teams

App

Monitor
buttons (Mute
/ Volume down
/ Volume up /
Hookswitch)
not working
on Microsoft
Teams® App with
Chrome OS /
Ubuntu

Video recording
not working

Video recording
App not working
with Win 7

Possible solutions

• Ensure that the latest BIOS and drivers for your
computer are installed on your computer.

• Ensure that the RealTek Gigabit Ethernet
Controller is installed in the Windows Device
Manager.

• If your BIOS Setup has a LAN/GBE Enabled/
Disabled option, make sure it is set to Enabled.

• Ensure that the Ethernet cable is connected
securely on the monitor and the hub/router/
rewall.

• Check the status LED of the Ethernet cable to
conrm connectivity. Re-connect both ends of
the Ethernet cable if the LED is not lit.

• First power o the Computer and unplug the
Type-C cable and power cord of the monitor.
Then, power on the computer, plug in the
monitor power cord and Type-C cable.

Use Microsoft Teams

®

App to perform the below

tasks:

• Call Icon to accept / hang up call

• Volume down / Volume up adjustment

• Mic mute / unmute

• Video on / o

• Windows 7 not support

• Switch to Windows 10

Headset with
Mic (3.5mm
combo jack) not
working with
monitor mute /
unmute button

Headset with

Mic (3.5mm

combo jack) not

working with

monitor mute /

unmute button

• Use UC App (e.g. Microsoft Teams, Skype
for Business, Zoom, etc.) Mic Icon to mute /
unmute

6. Trouble Shooting Instructions

Problem What you

experience

When press
either Volume
down / Volume
up or Mute
button, LED not
blink

Webcam or Mic
not working

Ethernet port
(RJ45) cannot
connect to
internet

No sound
coming from
the speakers

When press
either Volume
down / Volume
up or Mute
button, LED
not blink when
connected to
HDMI or DP only

Webcam or Mic
not working
when connected
to HDMI or DP
only

Ethernet port
(RJ45) cannot
connect to
internet on Win
10

No sound
coming from the
speakers when
play audio/video
on your system

Possible solutions

Connect USB-A to USB-C cable

Connect USB-A to USB-C cable

Change the LAN Controller Power Saving from
Enable to Disable

• Ensure that you have set the default playback
device as Echo Cancelling Speakerphone
U3223QZ or DELL U3223QZ on your system.

• Turn O the monitor, unplug the monitor power
cord, replug it, and then turn On the monitor.

• Reset the monitor to Factory Settings.

Speaker volume
is low / sounds
soft

Speaker volume
is low / sounds
soft when
speaker option is
DELL U3223QZ
in Sound setting
interface

• Increase the speaker volume of DELL U3223QZ
to maximum in the Sound setting interface

• Press the Volume Up button to increase the
speaker volume of DELL U3223QZ

• If you select DELL U3223QZ audio path,
please ensure that the Echo Cancelling
Speakerphone volume is set to medium or
high. Else, the DELL U3223QZ maximum
volume may sound soft because it is limited
by the Echo Cancelling Speakerphone
volume. For example, when the Echo Cancelling
Speakerphone volume is at 50%, and the DELL
U3223QZ volume is set to 100% will have the
same sound level as the former.

6. Trouble Shooting Instructions

Problem What you

experience

Webcam is not
detected

Webcam
cannot connect
/ Webcam
disconnected

Microphone is
muted

Webcam is not
detected in the
Windows Device
Manager

Could not detect
Monitor camera
/ Could not
switch back to
the PC camera

Microphone is
muted in the
Windows Device
Manager

Possible solutions

• Ensure that the USB upstream cable is
connected between the monitor and the
computer or notebook.

• Ensure that the USB is assign to the port which
usb USB cable plug in

• Reconnect the USB upstream cable to the
computer or notebook.

• Reset the monitor to Factory Settings.

• Turn O the monitor, unplug the monitor power
cord, replug it, and then turn On the monitor.

• Select the Monitor camera again in the
Camera / Video setting of your UC conference
application.

• Ensure that the USB upstream cable is
connected between the monitor and the
computer or notebook.

• Ensure that the USB is assign to the port which
usb USB cable plug in

• Reconnect the USB upstream cable to the
computer or notebook.

• Ensure that the microphone is enabled/
unmuted on the monitor. If the microphone
mute LED is lighting up in static red (indicates
microphone muted), press the microphone
button to unmute the microphone.

• Ensure that the monitor’s microphone is
selected and enabled/unmuted on the setting in
the UC application.

6. Trouble Shooting Instructions

Problem What you

experience

Microphone
volume is low /
sounds soft

Front buttons
don’t work

Webcam image
looks over­exposed

Webcam image
looks grainy /
dark

Webcam image
looks blurry

Microphone
volume is low
/ sounds soft
to the other
participant when
in audio/video
call

No response
on the UC
application when
press on the
buttons located
on the speaker

Webcam
image shows
over-exposed
background

Webcam image
appears grainy /
dark

Webcam image
appears blurry /
not clear.

Possible solutions

• Ensure the Mute button’s LED will go dark
(indicates microphone unmuted).

• Adjust the distance between the user and
the microphone. The user should avoid sitting
too far away from the microphone. The most
optimum distance between the user and the
microphone is 70 cm.

• Ensure that the monitor’s microphone is
selected and enabled/unmuted on the setting in
the UC application.

• Increase the microphone volume in the Sound
setting interface at the PC side / in the UC
application.

• Ensure that the USB upstream cable (Type-A to
Type-C or Type-C to Type-C) is connected from
the PC to the monitor.

• Ensure that the USB is assign to the port which
usb USB cable plug in

• For some UC platforms / applications, the Mute
function works by pressing the Mute button,
but the Mute Icon on the UC platform is not
sync (Icon shows unmute).

• Adjust the environment lighting condition.

• Ensure the monitor is setup at a well lighted
environment, preferably under ceiling lights. The
user should avoid a dim / dark background. The
user should avoid direct facing a window with
bright sunlight.

• Alternatively, you may use Dell Peripheral
Manager to adjust the webcam setting of color.

• Adjust the environment lighting condition.
Ensure the monitor is setup at a well lighted
environment, preferably under ceiling lights. The
user should avoid a dim environment.

• Use a clean and slightly damp cloth to wipe the

surface of the front webcam.

• Adjust the distance between the user and the

camera. The user should avoid sitting too far
away from the camera. The most optimum
distance between the user and the camera is
70 cm.

6. Trouble Shooting Instructions

Problem What you Possible solutions

experience

Teams
Microphone
volume

Teams/Zoom
small window
distorted

Image quality
poor

Tof no function Presence

Teams
Microphone
volume is smaller
than Zoom

Teams/Zoom
small window
image distorted

The image
quality of the
monitor was
poor

detection/wake­up not working

• This is normal behavior as the volume
specications are dierent between Teams and
Zoom.

• This is normal behavior. The resolution of the
small images are compressed when the main
image is in high resolution (4K). If a lower
resolution (720P & 1080P) is selected, there will
not be any dierence between the images.

Always poor:

• Check that your computer is USB 3.0-capable.

• Some computers have USB 3.0, USB 2.0, and
USB 1.1 ports. Ensure that the correct USB port
is used.

Sometime poor:

• Network will eect the image quality,ensure
your network is ne.

• When using Teams/Zoom call, the wake up

function not working is normal.

• It works when a user is not using Teams/Zoom.

6. Trouble Shooting Instructions

Microsoft® Teams® / Skype for Business® specific
problems

Problem What you

experience

The Teams
button is not
working

The
Hookswitch
button is not
working

The Mute
button is not
working

Webcam no
image

Webcam being
occupied

Short press
on the Teams
button does not
bring up Teams
application to the
foreground

Short press on
the Hookswitch
button does not
answer call

Press on the
Mute button
does not mute
and unmute
microphone

Webcam no
image when
using Skype for
Business (SfB)

Webcam being
occupied and
can’t be used

Possible solutions

• Ensure that the USB upstream cable (Type-A
to Type-B or Type-C to Type-C) is connected
from the PC to the monitor.

• Ensure that the Teams application is signed in
and is already running at the background. The
Teams button’s LED will light in static white.

• Ensure that the Teams account is provisioned
/ setup as ‘Teams Only’ mode. The tenant
administrator should enable the account to
‘Teams Only’ mode.

• Teams button will only work with Teams
application in ‘Teams Only’ mode. Setting
might vary in corporate environment, resulting
in Teams button not working on the monitor.
Please check with your system administrator.

• Ensure that the USB upstream cable (Type-A
to Type-C or Type-C to Type-C) is connected
from the PC to the monitor.

• Ensure that the Teams account is provisioned
/ setup as ‘Teams Only’ mode. The tenant
administrator should enable the account to
‘Teams Only’ mode.

• Ensure that the USB upstream cable (Type-A
to Type-C or Type-C to Type-C) is connected
from the PC to the monitor.

• Ensure that the Mute button’s LED will go dark
(indicates microphone unmuted).

• Ensure that the Teams account is provisioned
/ setup as ‘Teams Only’ mode. The tenant
administrator should enable the account to
‘Teams Only’ mode.

• Ensure that the USB upstream cable (Type-A
to Type-C or Type-C to Type-C) is connected
from the PC to the monitor.

• Select ‘DELL Monitor RGB Webcam’ as the
camera in Skype Video Device setting.

• Avoid running multiple conference softwares at
the same time. While you are using ‘conference
software A’, close the other ‘conference
software B’.

6. Trouble Shooting Instructions

Universal Serial Bus (USB) specific problems

Specific
Symptoms

USB interface is
not working

super speed
USB 3.2 Gen
2 interface is
slow.

Wireless USB
peripherals stop
working when a
USB 3.0 device
is plugged in

What you
experience

USB peripherals
are not working

super speed
USB 3.2 Gen
2 peripherals
working slowly or
not working at all

Wireless USB
peripherals
responding
slowly or only
working as
the distance
between itself
and its receiver
decreases

Possible solutions

• Check that your display is turned ON.

• Reconnect the upstream cable to your
computer.

• Reconnect the USB peripherals (downstream
connector).

• Turn o the monitor and turn it on again.

• Reboot the computer.

• Certain USB devices such as portable hard
drives require higher power source; connect
the drive to the computer directly.

• Check that your computer is USB 3.0-capable.

• Some computers have USB 3.0, USB 2.0, and
USB 1.1 ports. Ensure that the correct USB port
is used.

• Reconnect the upstream cable to your
computer.

• Reconnect the USB peripherals (downstream
connector).

• Reboot the computer.

• Increase the distance between the USB 3.0
peripherals and the wireless USB receiver.

• Position your wireless USB receiver as close as
possible to the wireless USB peripherals.

• Use a USB-extender cable to position the
wireless USB receiver as far away as possible
from the USB 3.0 port.