DELL P3223QE 4K USB-C Hub Monitor Owner’s Manual
- June 3, 2024
- Dell
Table of Contents
Service Manual – P3223QE
Version: 01
Date: 2022/03/28
Important Safety Notice
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.
Exploded view diagram with list of items
| Item | Description | Qty | Remark |
|---|---|---|---|
| 1 | Front trim | 1 | For EM EA Only. not for |
other regions
2| Panel| 1
3| LED BD| 1
4| ASSY Middle Frame| 1
5| USB BD| 1
6| Panel Mylar| 1
7| Interface BD| 1
8| Power BD| 1
9| Main bracket| 1
10| Key BD| 1
11| Joystick button| 1
12| Back cover| 1
13| Riser ASSY| 1
14| Base ASSY| 1
15| Power cable| 1| See “NOTE”
16| DisplayPort cable| 1| See “NOTE”
17| USB Type-C cable( C to C)| 1| See “NOTE”
18| USB Ty-C cable( A to C)| 1| See “NOTE”
NOTE:
For replacement of power cord, connectivity cable and external power supply
(if applicable), contact Dell:
- Go to https://www.dell.com/support.
- Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right corner of the page.
- Click Contact Us next to the country dropdown.
- Select the appropriate service or support link based on your need.
- Choose the method of contacting Dell that is convenient for you.
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.
4. How to connect and disconnect power cable/ connectivity cable
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
5.1 Disassembly Procedures:
S1
Remove the monitor stand base:
- Place the monitor on a soft cloth or cushion.
- Press and hold the stand-release button.
- Lift the stand up and away from the monitor.
S2
Use a Philips-head screwdriver to remove four screws for unlocking mechanisms.
(No.1~4 screw size=M4x11; Torque=11±1kgfxcm) S3
Wedge your fingers between the 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 pll up carefully the rear cover
in order of arrow preference for unlocking mechanisms of rear cover.
S4
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 diasassembling.
S5
** 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)**
S6
Tear off 4pcs aluminum foil and 1pcs acetate tape as the picture below shown.
Disassembly and Assembly Procedures
S7 Use a Philips-head screwdriver to remove one screw for unlocking the USB board, then disconnect the USB FFC cable and remove away the USB board. (No.1 screw size=M3x4.5, Torque=4±0.5kgfxcm)
S8 Use a Philips-head screwdriver to remove 15(13+2)pcs screws for unlocking
the middle bezel.
(No.1~13 screw size=M3x5, Torque=5±0.5kgfxcm
No.14~15 screw size=M2x3.3, Torque=0.8~1.2kgfxcm)
S9 Disconnect the panel lamp from the connectors of the panel and interface board and then put it aside. Disconnect the LED cable from the connector of the interface board, then release the LED cable by tearing off the 2pcs tapes.
S10
Take away the middle bezel, and put it on a fixture, then tear off the mylar
tape for releasing the LED board 
S11
Use a Philips-head screwdriver to remove 4pcs screws for unlocking the bracket
with panel module. (No.1~4 screw size=M3x4, Torque=5±0.5kgfxcm)
S12
Lift up the panel for releasing the front bezel away from the panel.
S13
Disconnect the EDP cable away from the connectors of the panel, and then
remove the bracket and put it on a cushion. Tear off the acetate tape of the
panel.
S14 Remove the Mylar tape from the hooks of the bracket.
S15 Use a Philips-head screwdriver to remove screws for interface board and
power board. 8pcs
(No.1 screw size=M4x8, Torque=7±1kgfxcm;
No.2~8 screw size=M3x7.5, Torque=7±1kgfxcm)
S16 Remove the power board board and interface board from the disconnect all of the cables. bracket chassis module carefully, and then
S1
5.2 Assembly Procedures:
Place a bracket chassis base on a protective cushion, then stick 4pcs Silicon
sheet on the position as the picture below shown. S2
Turn over a power board and put the power board into the bracket chassis.
S3
Take a interface board, connect 1pcs EDP cable to the connectors of the
interface board, then connect the cable of the power board to the connector of
the interface board. Paste 1pcs tape on the board. Turn over the interface
board and locate it into the bracket, then locate all the cables into the
correct position of the bracket. Use a Philips-head screwdriver to tighten
8pcs screws for locking the circuit board, . (No.1 screw size=M4x8,
Torque=7±1kgfxcm; No.2~8 screw size=M3x7.5, Torque=7±1kgfxcm)
S4
Take a mylar to insert the hooks of the bracket to cover the power board as
the following picture shown. S5
Panel preparation: Take a panel and then examine the panel surface according
to inspection criteria. Tear off the protective film of the panel screen, and
then turn over the panel to place screen faced down. Paste 1pcs acetate tape
on the specific position as the picture below shown.
S6
Put down the bracket on the back of panel, then connect the EDP cable to the
connector of the panel.
S7 Take 1pcs front bezel, then lift up the panel and assemble the front bezel with the panel module. S8 Use a Philips-head screwdriver to tighten 4pcs screws for locking the bracket with panel module. (No.1~4 screw size=M3x4, Torque=5±0.5kgfxcm)
S9
Take 1pcs LED board and 1pcs middle bezel, then put the middle bezel into a
fixture jip to fix the middle bezel. Tear off the release paper on the back of
the board, and then paste the LED board on the correct position of the middle
bezel, then paste 1pcs mylar tape to cover the LED board.
S10
Assemble 1pcs middle bezel which have been assembled with LED board with front
bezel and panel module.
S11
Tear off the papers of the tapes on the back of the LED cable, and then fix
the LED cable on the panel with 2pcs tapes, then connect the LED cable with
the connector of the board. Take 1pcs panel lamp cable to connect the circuit
board with the two connectors of the panel.
S12
Use a Philips-head screwdriver to tighten 15(13+2)pcs screws for locking the
middle bezel with the panel and front bezel.
(No.1~13 screw size=M3x5, Torque=5±0.5kgfxcm;
No.14~15 screw size=M2x3.3, Torque=0.8~1.2kgfxcm)
S13
Take 1pcs USB board, 1pcs LVDS cable, 1pcs conductive foam. Connect the LVDS
cable to the connector of the USB board, then paste 1pcs conductive foam on
the back of the USB board, and then locate the USB board into the correct
position of the middle bezel. Use a Philips-head screwdriver to tighten 1pcs
screw for locking the
USB unit with the middle bezel, then connect the cable with assemble unit.
(No.1 screw size=M3x4.5, Torque=4±0.5kgfxcm)
S14
Paste 1pcs acetate tape to cover the USB connector. Paste 1pcs aluminum foil
to cover the USB board. Paste 1pcs aluminum foil to cover EDP connector. Paste
1pcs aluminum foil to fix the cables. Paste 1pcs aluminum foil to cover the
bracket as the picture below shown.
S15
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. Tear off the tape papers on the back of the cable, and then
fix the key cable with tapes.
(No.1 screw size=M2x2.4, Torque=0.9±0.1kgfxcm)
S16
Move the assembled rear cover close to the panel unit, then connect the key
cable to the connector of interface board. Put down the rear cover and push
the rear cover on the positions marked as the picture below shown for
mechanisms engagement.
S17
Use a Philips-head screwdriver to tighten 4pcs screws for locking the rear
cover with the assembled unit. Stick 2pcs labels on the specific positions of
the rear cover as the picture below shown. (No.1~4 screw size=M4x11;
Torque=11±1kgfxcm)
S18
Take a stand base close to the monitor. Fit the two tabs on the upper part of
the stand into the grooves, and then lower the stand so that the monitor
mounting area snaps onto the stand.
S19
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.
Trouble Shooting Instructions
WARNING: Before you begin any of the procedures in this section, follow
the Safety 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:
-
Turn off both your computer and the monitor.
-
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.
-
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.
-
This box also appears during normal system operation if the video cable becomes disconnected or damaged.
-
Turn off 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.
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.
NOTE: You can run the built-in diagnostics only when the video cable is
unplugged and the monitor is in self-test mode. To Run the Built-in
Diagnostics:
- Ensure that the screen is clean (no dust particles on the surface of the screen).
- Select OSD items of Self-Diagnostics in Others feature.
- Press the Joystick button to start the diagnostics. A gray screen is displayed.
- Observe if the screen has any defects or abnormalities.
- Toggle the Joystick once again until a red screen is displayed.
- Observe if the screen has any defects or abnormalities.
- 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 the text screen appears. 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.
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/support/monitors
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 Pixel Policy, see Dell
Support site at:
https://www.dell.com/support/monitors
Brightness Problems| Picture too dim or too bright| • Reset the monitor to
factory settings.
• Adjust brightness and contrast controls via OSD.
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| • Try different Preset Modes in Color
settings OSD.
• Adjust R/G/B value under Custom Color in Color menu OSD.
• Change the Input Color Format to RGB or YCbCr in the Color settings 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 off 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.
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
buttons on the front panel| OSD does not appear on the screen| • Turn off 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 different video formats (aspect ratio)
of DVDs, the monitor may display in full screen.
• Run the built-in diagnostics.
No image when using USB-C connection
to computer, laptop, and so on| Black screen| • Verify if the USB-C interface
of the device can support DP alternate mode.
• Verify if the device required more than 90W power charging.
• USB-C interface of device cannot support DP alternate mode.
• Set Windows to Projection mode.
• Ensure that the USB-C cable is not damaged.
No charging when using USB-C
connection to computer, laptop, and so
on| No charging| • Verify if the device can support one of 5V/9V/15V/20V
charging profiles.
• Verify if the Notebook requires a > 90W power adaptor.
• If the Notebook requires a > 90W power adaptor, it may not charge with the
USB-C connection.
• Ensure that you use only Dell approved adapter or the adapter that comes
with the product.
• Ensure that the USB-C cable is not damaged.
Intermittent charging when using USB-C
connection to computer, laptop, and so on| Intermittent charging| • Check if
the maximum power consumption of device is over 90W.
• Ensure that you use only Dell approved adapter or the adapter that comes
with the product.
• Ensure that the USB-C cable is not damaged.
Refresh rate drop to 30 Hz or color bits
drop to 6 bits| Refresh rate drop or color bits drop| • The monitor is 2 Lane
default for USB-C, it need to switch the USB-C priortizaiotn to high
resolution for full performance image for DP 1.2 platform.
No network connection| Network dropped or intermittent| • Do not toggle Off/On
the power button when network is connected, keeps the power button On.
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/ firewall.
• Check the status LED of the Ethernet cable to confirm connectivity. Re-
connect both ends of the Ethernet cable if the LED is not lit.
• First power off 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 the
Type-C cable.
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 off 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 5 Gbps (USB 3.2 Gen1)
interface is slow.| USB 3.2 Gen1 peripherals working slowly
or not working at all| • Check that your computer is USB 3.2 Gen1capable.
• Some computers have USB 3.2 Gen1, 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 3.2 Gen1 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 3.2 Gen1 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 3.2 Gen1 port.
USB is not working| No USB functionalities| Refer to input source and USB
pairing table.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>