DELL U4323QE UltraSharp 43 Inch 4K USB-C Hub Monitor Instruction Manual
- October 30, 2023
- Dell
Table of Contents
DELL U4323QE UltraSharp 43 Inch 4K USB-C Hub Monitor
Product Information
The product being referred to in these instructions is the DELLU4323QE monitor. These instructions provide information on how to disassemble the monitor for repair or maintenance purposes. The instructions include information on removing the rear cover, stand, unlocking mechanisms, keyboard, speakers, USB unit, bracket chassis, panel module, LED key board, and electrolyte capacitors. The instructions also include specific screw sizes and torque requirements for each step.
Product Usage Instructions
These instructions are intended for use by individuals with experience in disassembling electronic devices. It is important to follow each step carefully and use the recommended tools to avoid causing damage to the monitor or injuring oneself.
- Turn off the power and unplug external cables (power cable and video cable) from the monitor.
- To remove the screen protector, 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. Use one hand to press the middle bezel and the other hand to pull up the rear cover in order of arrow preference for unlocking the rear cover.
- 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.
- To remove the stand from the product, press the stand release button, lift the stand up and away from the monitor.
- Use a Philips-head screwdriver to remove 4pcs screws for unlocking mechanisms. Remove DP caps.
- 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=M2x3.3, Torque=0.8~1kgfxcm)
- Use a Philips-head screwdriver to remove 7pcs screws for unlocking the two speakers. Release the speakers’ cable from the hooks of the middle frame, then remove the speakers.
- Use a Philips-head screwdriver to remove 4pcs screw for unlocking the USB unit with the middle frame, and then release the USB unit from the hooks.
- Tear off 1pcs aluminum foil to release the bracket chassis. Use a Philips-head screwdriver to remove 28pcs screws for unlocking the middle frame with the panel module.
- Tear off 3pcs aluminum foil, then use a Philips-head screwdriver to lift up the bracket chassis and disconnect the LVDS cable from the connector of the T-CON board of panel module. Put the bracket chassis on a protective cushion for later disassembling.
- Remove 2pcs shading tape on the left and right side of the panel corner, then remove 27pcs acetate tapes on the specific positions of the back of panel.
- Tear off 4pcs rubbers, then use a Philips-head screwdriver to remove 2pcs screws for unlocking the small bracket with T-Con board, then remove the small bracket, then release the LED key cable by tearing off tapes on the back of the cable. (No.1~2 Screw size= M3x0.5×4, Torque=3~5kgfxcm)
- Lift up the middle frame and put it into a fixture, tear off the maylar tape for releasing the LED key board away from the middle frame.
- Remove electrolyte capacitors (red mark) from printed circuit boards.
- Take out bulk cap. pin solder with soldering iron and absorber.
- Cut the glue between bulk cap. and PCB with a knife.
- Lift the bulk cap. up and away from the PCB.
- Ensure cutting path within the glue, don’t touch bulk cap. or PCB.
- Cut into the bottom of bulk cap. and pull it up carefully.
It is important to dispose of or recover the substances, preparations, or components mentioned in the product material information separately from other WEEE in compliance with Article 4 of EU Council Directive 75/442/EEC.
Disassembly Procedures
-
Turn off power.
-
Unplug external cables(power cable and video cable) from the monitor.
-
Remove stand from the product.(Press the stand release button, lift the stand up and away from the monitor)
-
Use a Philips-head screwdriver to remove 4pcs screws for unlocking mechanisms. Remove DP caps.(No.1~4 screw size=M4x11; Torque=11±1kgfxcm)
-
Tear off screen protector, then 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 the rear cover in order of arrow preference for unlocking the rear cover.
-
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 keyboard, then tear off the tapes and release the key board. (No.1~2 screw size=M2x3.3, Torque=0.8~1kgfxcm)
-
Use a Philips-head screwdriver to remove 7pcs screws for unlocking the two speakers. Release the left speaker cables from the probers of the middle frame, and then disconnect the speaker cable, LED cable and USB cable away from the connector.
(No.1~7 screw size=M3x8, Torque=4±1kgfxcm) -
Use a Philips-head screwdriver to remove 4pcs screw for unlocking the USB unit with the middle frame, and then release the USB unit from the hooks of middle frame.
(No.1~4 screw size=M3x4, Torque=3.5±0.5kgfxcm) **** -
Use a Philips-head screwdriver to remove 2pcs screws for unlocking the USB cover, remove the USB cover, then use a Philips-head screwdriver to remove 1pcs screw for locking the USB board with the USB bracket. Disconnect the USB connective cable.
(No.1 screw size=M3x3, Torque=3.5±0.5kgfxcm; No.2~3 screw size=M3x4, Torque=1±0.2kgfxcm) -
Release the speakers’ cable to from the hooks of the middle frame, then remove the speakers.
-
Tear off 1pcs aluminum foil to release the bracket chassis. Use a Philips-head screwdriver to remove 28pcs screws for unlocking the middle frame with the panel module. (No.1~28 Screw size= M3x0.5×4, Torque=5±0.5kgfxcm)
-
Tear off 3pcs aluminum foil, then use a Philips-head screwdriver to remove 4pcs screws for locking the bracket chassis module with the panel. (No.1~4 Screw size= M6x12, Torque=9±0.5kgfxcm)
-
Lift up the bracket chassis, and disconnect the LVDS cable from the connector of the T-CON board of panel module, then put the bracket chassis on a protective cushion for later disassembling.
-
Tear off 4pcs rubbers , then use a Philips-head screwdriver to remove 2pcs screws for unlocking the small bracket with T-Con board, then remove the small bracket, then release the LED key cable by tearing off tapes on the back of the cable. (No.1~2 Screw size= M3x0.5×4, Torque=3~5kgfxcm)
-
Lift up the middle frame and put it into a fixture, tear off the maylar tape for releasing the LED key board away from the middle frame.
-
Remove 2pcs shading tape on the left and right side of the panel corner, then remove 27pcs acetate tapes on the specific positions of the back of panel.
-
Use a Philips-head screwdriver to remove 9pcs screws for unlocking power board and interface board with the bracket. (No.1 screw size=M4x8, Torque=6±0.5kgfxcm; No.2~8 screw size=M3x7.5, Torque=6±0.5kgfxcm)
-
Remove the circuit boards from the bracket chassis module carefully, and then disconnect all of the cables.
-
Remove electrolyte capacitors (red mark) from printed circuit boards.
-
S20-1 Cut the glue between bulk cap. and PCB with a knife.
-
S20-2 Ensure cutting path within the glue, don’t touch bulk cap. or PCB.
-
S20-3 Cut into the bottom of bulk cap. and pullit up carefully.
-
S20-4 Take out bulk cap. pin solder with soldering iron and absorber.
-
S20-5 Lift the bulk cap. up and away from the PCB.
Product material information
The following substances, preparations, or components should be disposed of or recovered separately from other WEEE in compliance with Article 4 of EU Council Directive 75/442/EEC.
Capacitors/condensers (containing
PCB/PCT)
| No used
---|---
Mercury containing components| No used
Batteries| No used
Printed circuit boards (with a surface
greater than 10 square cm)
| Product has printed circuit boards (with a
surface greater than 10 square cm)
Component contain toner, ink and
liquids
| No used
Plastic containing BFR| No used
Component and waste contain
asbestos
| No used
CRT| No used
Component contain CFC, HCFC, HFC
and HC
| No used
Gas discharge lamps| No used
LCD display > 100 cm2| Product has an LCD greater than 100 cm2
External electric cable| Product has external cables
Component contain refractory
ceramic fibers
| No used
Component contain radio-active
substances
| No used
Electrolyte capacitors (height
25mm, diameter > 25mm)
| Product has electrolyte capacitors (height >
25mm, diameter > 25mm)
Tools 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
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