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This document outlines the detailed disassembly procedures for the Dell U3223QE monitor, providing a comprehensive guide for technicians or users who need to access internal components for repair, recycling, or selective treatment of materials. The process is broken down into sequential steps, each accompanied by illustrative images and specific instructions regarding tools, screw types, and torque values where applicable.
The initial steps focus on unpacking the monitor and preparing it for disassembly. This begins with opening the carton using an appropriate tool, followed by carefully removing all accessories, including optional labels, the Quick Start Guide (QSG), Delta-E paper, DP cable, USB-C to C cable, USB-A to C cable, power cable, and the manual. It's noted that the presence of these accessories may vary, especially if the monitor is being returned by a user. Next, the paper top with the base is removed from the carton, followed by the monitor and its stand. The monitor is then taken out of its EPE (Expanded Polyethylene) bag and placed on a protective cushion to prevent damage during subsequent steps.
The core disassembly process starts with the removal of the rear cover. This involves using a Philips-head screwdriver to remove four screws that secure the unlocking mechanisms. The DP caps are also removed at this stage. The screw size is specified as M4x11, with a torque of 11±1kgfxcm. Following this, the screen protector is torn off. To release the rear cover, fingers are wedged between the rear cover and the middle bezel at the top corners of the monitor. One hand then presses the middle bezel while the other pulls up the rear cover, following the indicated arrow preference to unlock it. Once the rear cover is lifted carefully, the joystick key cable is disconnected from the interface board connector. The rear cover is then set aside for later reassembly or disposal.
Further disassembly involves the keyboard. A Philips-head screwdriver is used to remove two screws (M2x2.4, torque 0.8~1kgfxcm) that unlock the keyboard. Tapes are torn off to release the keyboard. The next step involves removing a piece of aluminum foil to unfix a bracket, followed by tearing off an acetate tape to uncover the LVDS (Low-Voltage Differential Signaling) connector.
The USB board is then addressed. One screw (M3x6, torque 4±0.5kgfxcm) is removed with a Philips-head screwdriver to unlock the USB board. Two cables are disconnected, and the USB board is released from the hooks of the middle bezel. Following this, a significant number of screws are removed to separate the middle bezel from the panel module. Specifically, 18 screws are mentioned: 13 screws of size M3x5 (torque 5±0.5kgfxcm) and 5 screws of size M3x4.5 (torque 5±0.5kgfxcm).
The panel lamp cables are then disconnected from the panel connectors, and the LED cable is disconnected from the interface board connector. A Philips-head screwdriver is used again to remove four screws (M3x5, torque 5±0.5kgfxcm) that unlock the bracket chassis module from the panel. Once these screws are removed, the middle bezel can be lifted up and placed on a cushion foam for further disassembly. The tape on the middle bezel is torn off to release the LED cable, and then the mylar tape is torn off to release the LED board from the hooks of the middle bezel.
The bracket is then moved up, and the earing-lock is pushed to disconnect the LVDS cable from the panel module connectors. The bracket chassis module is then taken away and placed on a protective cushion. The panel lamp cables are released from the hooks of the bracket, and the mylar tape is removed from the hooks of the bracket.
The interface board and power board are then targeted. A Philips-head screwdriver is used to remove eight screws: one screw of size M4x8 (torque 7±1kgfxcm) and seven screws of size M3x7.5 (torque 7±1kgfxcm). The power board and interface board are carefully removed from the bracket chassis module, and all associated cables are disconnected.
A critical part of the selective treatment process involves removing electrolyte capacitors from the printed circuit boards, specifically those marked in red. This is a multi-step process:
The document also provides essential product material information, detailing substances, preparations, or components that require separate disposal or recovery in compliance with Article 4 of EU Council Directive 75/442/EEC. This includes a table indicating whether specific components are used in the monitor and if they require special handling. For instance, it states that the product has printed circuit boards with a surface greater than 10 square cm, an LCD greater than 100 cm2, external cables, and electrolyte capacitors with a height greater than 25mm and a diameter greater than 25mm. It explicitly states "No used" for mercury-containing components, batteries, components containing toner/ink/liquids, plastic containing BFR, asbestos, CRT, CFC/HCFC/HFC/HC, gas discharge lamps, refractory ceramic fibers, and radioactive substances.
Finally, a list of required tools is provided, outlining the type and size of tools typically used to disassemble the product to the point where components and materials requiring selective treatment can be removed. These include Philips-head screwdrivers (#1 and #2), a penknife, and a soldering iron with an absorber.
In summary, this manual serves as a detailed procedural guide for the disassembly of the Dell U3223QE monitor, emphasizing careful handling, specific tool usage, and adherence to environmental regulations for material recovery and disposal.
General| Screen Size | 31.5 inches |
|---|---|
| Resolution | 3840 x 2160 (4K UHD) |
| Panel Type | IPS Black |
| Aspect Ratio | 16:9 |
| Contrast Ratio | 2000:1 |
| Refresh Rate | 60 Hz |
| Color Support | 1.07 billion colors |
| Color Gamut | 100% sRGB, 98% DCI-P3 |
| HDR | HDR400 |
| USB-C Power Delivery | Up to 90W |
| Built-in Speakers | No |
| Stand Adjustments | Height, Tilt, Swivel, Pivot |
| VESA Mount | 100 x 100 mm |
| Brightness | 400 cd/m² (typical) |
| Response Time | 5 ms (GtG) |
| Ports | 1 x DisplayPort 1.4, 1 x HDMI 2.0, 1 x USB-C (DisplayPort Alt Mode, Power Delivery up to 90W), 4 x USB-A 3.2 Gen 2, 1 x RJ45, 1 x Audio Line-Out |
| Viewing Angle | 178° (H) / 178° (V) |
| Power Consumption | 230 W (max) |
