DELL U3223QZ User Manual
Displayed below is the user manual for U3223QZ by DELL which is a product in the Computer Monitors category. This manual has pages.
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Version: 01
Date: 2022/2/28
Service Manual - U3223QZ
Product Announcement:
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
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.
! 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.
1. Important Safety Notice
2. Exploded view diagram with list of items
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.
1
2
34
5
6
7
8
910 11 12
Item Description Q'ty Remark
1
PCBA Touch BD
1
For EMEA Only, not for
other regions
2
PCBA Interface BD
1
13
4 1
15
6Camera Module 1
1 7
8 1
13
14
15
Front Trim
1
1
Power cable
16
See “NOTE”
Mid Frame
Panel
DisplayPort cable
USB 3.2 Gen2 Type A to Type C upstream cable
PCBA USB BD
PCBA Power BD
USB Type C Cable ( C to C)
1
1
See “NOTE”
See “NOTE”
See “NOTE”
ASSY Rear Cover
19
10 PCBA Joystick BD 1
1 11
12 1
ASSY Main Chassis
Stand Base
13 14 15 16
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
4.1 Disassembly Procedures:
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
S3
S2
S1
S1
Remove the monitor stand base:
1. Place the monitor on a soft cloth or cushion.
2. Press and hold the stand-release button.
3. Lift the stand up and away from the monitor.
S6
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.
S4
S5
Use a Philips-head screwdriver to remove 4pcs
screws for unlocking mechanisms. Remove DP caps.
(No.1~4 screw size=M4x11; Torque=11±1kgfxcm)
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)
3
2
1
2
23
41
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.
1
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)
5. Disassembly and Assembly Procedures
S10
S9
S8
1
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)
1
2
4
3
85
6
7
S7
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
frame, then remove it and put it aside.
(No.1~5 Screw size= M3x4.5, Torque=5±0.5kgfxcm)
8
7
654
223
3
18
6
10
18
16 15 17
14
7
2
12
11
9
45
13
U to remove
18(13+5)pcs screws for unlocking the middle bezel
with the panel,
with board.
se a Philips-head screwdriver
to remove 4pcs screws for unlocking
the bracket with the panel, to remove 1pcs screws to
unlock the heat-sink
(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)
20
21
19
22 23
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.
S11
L middle bezel, and then
release the front bezel away from the middle frame.
ift up and take away the
conductive foam
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)
S13
S12
Take away the bracket chassis module and then put
the bracket chassis module on a protective cushion.
12
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.
Tear off acetate tape, then disconnect the EDP cable
away from the connector of the panel module.
S15
S14
S16
5. Disassembly and Assembly Procedures
Use a Philips-head screwdriver to remove
screws for interface board and power board. Release
the panel lamp cable from the hook of the bracket.
8pcs
(No.1 screw size=M4x8, Torque=7±1kgfxcm;
No.2~8 screw size=M3x7.5, Torque=7±1kgfxcm)
S18
Release the EDP cable from the hook of the bracket,
then remove the Mylar tape from the bracket.
S17
1
3
4
2
68
75
Remove the power board and interface board from
the
disconnect all of the cables.
bracket chassis module carefully, and then
S19
5. Disassembly and Assembly Procedures
Take a power board and put the power board into
the bracket chassis.
Place a bracket chassis base on a protective
cushion, then stick 9pcs Silicon sheets on the
positions as the picture below shown.
5.2 Assembly Procedures:
S2
S1
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.
S4
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)
S3
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.
S5
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.
S6
1
3
4
2
68
75
5. Disassembly and Assembly Procedures
S8
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.
S7
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)
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.
12
S9
sound-absorbing foam
5. Disassembly and Assembly Procedures
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.
S15
1
3
Move the middle frame with front bezel close to the
panel unit, then assemble the middle frame with the
panel module.
S10
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)
S11
3
18
6
10
18
16 15 17
14
7
2
12
11
9
45
13
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.
conductive foam
S12
Adjust the bracket chassis module, and then u
.
se a
Philips-head screwdriver to tighten 4pcs screws for
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)
S13
24
5
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)
S14
8
7
654
223
S17
S19
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)
S16
1
2
4
3
85
6
7
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)
2
1
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.
S18
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)
1
2
5. Disassembly and Assembly Procedures
S20
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.
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.
S22
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)
S21
23
41
5. Disassembly and Assembly Procedures
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.
Exit
UltraSharp 32 Monitor
Display Info
Reset Others
Factory Reset
Firmware 12T106
Service Tag ABCDEFG
DDC/CI On
LCD Conditioning O
ENERGY STAR
®
Select
√
Self-Diagnostic Select √
Input Source
Color
Brightness/Contrast
Display
PIP/PBP
Personalize
Others
Menu
USB
Audio & Webcam
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
What you
experience
Possible solutions
No Video/
Power LED off
No picture • Ensure that the video cable connecting
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.
No Video/
Power LED on
No picture or no
brightness
• 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.
Missing Pixels LCD screen has
spots
• 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.
Stuck-on Pixels LCD screen has
bright spots
• 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.
Brightness
Problems
Picture too dim or
too bright
• Reset the monitor to factory settings.
• Adjust brightness and contrast controls via
OSD.
6. Trouble Shooting Instructions
Common
Symptoms
What you
experience
Possible solutions
Safety Related
Issues
Visible signs of
smoke or sparks
• Do not perform any troubleshooting steps.
• Contact Dell immediately.
Intermittent
Problems
Monitor
malfunctions on
& off
• 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.
Missing Color Picture missing
color
• 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.
Wrong Color Picture color not
good
• 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.
Image retention
from a static
image left on
the monitor for
a long period of
time
Faint shadow from
the static image
displayed appears
on the screen
• 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.
Mic/Webcam
does not work
• USB cable
not plug in or
not select the
correct USB
source
• Not set the
monitor Mic/
webcam as the
default device
• 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
Possible solutions
Screen image is
too small
Image is
centered on
screen, but does
not fill entire
viewing area
• Check the Aspect Ratio setting in the Display
menu OSD.
• Reset the monitor to factory settings.
Cannot adjust
the monitor
with the
joystick control
on the rear of
the monitor
OSD does not
appear on the
screen
• Turn o the monitor, unplug the monitor
power cable, plug it back, and then turn on the
monitor.
No Input Signal
when user
controls are
pressed
No picture, the
LED light is white
• 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.
The picture
does not fill the
entire screen
The picture
cannot fill the
height or width
of the screen
• Due to dierent video formats (aspect ratio) of
DVDs, the monitor may display in full screen.
• Run the built-in diagnostics.
No image
when using DP
connection to
the PC
Blank screen • Verify which DP standard is your Graphics Card
certied 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
Possible solutions
No image
when using
USB Type-C
connection
to computer,
laptop, and so
on
Blank screen • Verify if the USB Type-C interface of the device
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.
No charging
when using
USB Type-C
connection
to computer,
laptop, and so
on
No charging • Verify if the device can support one of 5 V/9
V/15 V/20 V charging proles.
• 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.
Intermittent
charging
when using
USB Type-C
connection to
computer,
laptop, and so
on
Intermittent
charging
• 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.
No image when
using USB
Type-C MST
Blank screen or
2nd DUT is not
Prime mode
• 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.
No network
connection
Network
dropped or
Intermittent
• 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
Possible solutions
The LAN port is
not functioning
OS setting or
cable connection
issue
• 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
conrm 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.
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
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
Video recording
not working
Video recording
App not working
with Win 7
• 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
Possible solutions
When press
either Volume
down / Volume
up or Mute
button, LED not
blink
When press
either Volume
down / Volume
up or Mute
button, LED
not blink when
connected to
HDMI or DP only
Connect USB-A to USB-C cable
Webcam or Mic
not working
Webcam or Mic
not working
when connected
to HDMI or DP
only
Connect USB-A to USB-C cable
Ethernet port
(RJ45) cannot
connect to
internet
Ethernet port
(RJ45) cannot
connect to
internet on Win
10
Change the LAN Controller Power Saving from
Enable to Disable
No sound
coming from
the speakers
No sound
coming from the
speakers when
play audio/video
on your system
• 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
Possible solutions
Webcam is not
detected
Webcam is not
detected in the
Windows Device
Manager
• 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.
Webcam
cannot connect
/ Webcam
disconnected
Could not detect
Monitor camera
/ Could not
switch back to
the PC camera
• 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.
Microphone is
muted
Microphone is
muted in the
Windows Device
Manager
• 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
Possible solutions
Microphone
volume is low /
sounds soft
Microphone
volume is low
/ sounds soft
to the other
participant when
in audio/video
call
• 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.
Front buttons
don’t work
No response
on the UC
application when
press on the
buttons located
on the speaker
• 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).
Webcam image
looks over-
exposed
Webcam
image shows
over-exposed
background
• 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.
Webcam image
looks grainy /
dark
Webcam image
appears grainy /
dark
• 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.
Webcam image
looks blurry
Webcam image
appears blurry /
not clear.
• 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
Microphone
volume is smaller
than Zoom
• This is normal behavior as the volume
specications are dierent between Teams and
Zoom.
Teams/Zoom
small window
distorted
Teams/Zoom
small window
image distorted
• 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 dierence between the images.
Image quality
poor
The image
quality of the
monitor was
poor
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 eect the image quality,ensure
your network is ne.
Tof no function Presence
detection/wake-
up not working
• 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
Possible solutions
The Teams
button is not
working
Short press
on the Teams
button does not
bring up Teams
application to the
foreground
• 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.
The
Hookswitch
button is not
working
Short press on
the Hookswitch
button does not
answer call
• 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.
The Mute
button is not
working
Press on the
Mute button
does not mute
and unmute
microphone
• 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.
Webcam no
image
Webcam no
image when
using Skype for
Business (SfB)
• 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.
Webcam being
occupied
Webcam being
occupied and
can’t be used
• 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
What you
experience
Possible solutions
USB interface is
not working
USB peripherals
are not working
• 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.
super speed
USB 3.2 Gen
2 interface is
slow.
super speed
USB 3.2 Gen
2 peripherals
working slowly or
not working at all
• 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.
Wireless USB
peripherals stop
working when a
USB 3.0 device
is plugged in
Wireless USB
peripherals
responding
slowly or only
working as
the distance
between itself
and its receiver
decreases
• 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.