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This document outlines the disassembly procedures and material information for the DELL S2721DSB monitor, providing a comprehensive guide for technicians and users interested in its internal components and maintenance. The monitor is designed for general display purposes, offering a visual interface for various computing tasks. Its construction emphasizes ease of disassembly for repair, recycling, and component replacement, aligning with environmental directives for waste electrical and electronic equipment (WEEE).
The DELL S2721DSB functions primarily as a visual display unit, connecting to a computer or other video sources to present graphical and textual information. It serves as an essential peripheral for productivity, entertainment, and communication. The internal architecture includes a power supply board (SPS BD), an interface board (I/F BD), and a control board (CTRL BD), which collectively manage power distribution, video signal processing, and user input. The display utilizes an LCD panel, which is a common technology for modern monitors, providing a clear and vibrant visual experience. Audio output is handled by integrated speakers (SPK), which are connected via dedicated wiring and screws, indicating an all-in-one multimedia capability. The monitor also incorporates various flexible flat cables (FFCs) for internal communication between boards, such as the CTRL FFC and FFC LVDS, ensuring seamless data transfer.
The DELL S2721DSB is designed for straightforward setup and operation. Users can easily connect it to their devices using standard video cables. The monitor's stand is detachable, allowing for flexible placement or mounting options. The stand release button at the back of the display facilitates quick removal, enabling users to customize their workspace. The control board, accessible through the monitor's rear, houses the On-Screen Display (OSD) buttons, which allow users to navigate menus and adjust settings such as brightness, contrast, and input sources. The monitor's design incorporates a robust rear cover that protects internal components while maintaining a sleek aesthetic. The use of screws for securing various parts, such as the rear cover, speaker assembly, and main shield, ensures structural integrity and allows for controlled access during maintenance. The monitor's internal wiring, including backlight and speaker wires, is carefully routed and secured with adhesive tapes, preventing accidental disconnections and ensuring reliable performance.
The DELL S2721DSB is designed with maintainability in mind, adhering to principles that facilitate component replacement and recycling. The disassembly process is systematic, starting with the removal of the stand and rear cover. The rear cover is secured by four screws, and its removal follows a specific sequence to prevent damage. Once the rear cover is off, internal components become accessible. Adhesive tapes securing the backlight and speaker wires are easily torn off, allowing for their disconnection. The speaker assembly itself is secured by six screws and can be pulled out from the interface board, enabling replacement if needed.
Further disassembly involves removing the middle frame (MF) and main shield (SHD), which are secured by multiple screws. The middle frame is held by eleven screws, while the main shield requires the removal of four screws. Various FFCs, such as the CTRL FFC and FFC LVDS, can be pulled out from their respective boards, simplifying the process of isolating and replacing specific components. The control board (CTRL BD) is secured by two screws and its FFC can be torn off from the middle frame and disconnected from the control board itself. The OSD buttons, which are part of the control board assembly, can be unclasp from their groove, allowing for their removal.
The power supply board (SPS BD) and interface board (I/F BD) are critical components that can be disassembled from the main shield by unlocking eight PCBA screws. Before reaching these boards, safety mylar and other small mylar pieces need to be removed. A key maintenance feature highlighted is the removal of electrolyte capacitors from the printed circuit boards. This process involves cutting the glue between the bulk capacitor and the PCB with a knife, ensuring the cutting path is within the glue and does not damage the capacitor or PCB. Subsequently, the bulk capacitor's pin solder is taken out using a soldering iron and absorber, allowing the capacitor to be lifted up and away from the PCB. This detailed procedure for capacitor removal is crucial for proper recycling and component replacement, emphasizing the monitor's design for comprehensive serviceability. The document also lists essential tools required for disassembly, including a screwdriver, scraper bar, penknife, soldering iron, and absorber, indicating that standard tools are sufficient for most maintenance tasks. This focus on modularity and accessible components ensures that the DELL S2721DSB can be efficiently repaired and its materials responsibly managed at the end of its life cycle.
General| Screen Size | 27 inches |
|---|---|
| Resolution | 2560 x 1440 (QHD) |
| Panel Type | IPS |
| Refresh Rate | 75 Hz |
| Brightness | 350 cd/m² |
| Contrast Ratio | 1000:1 |
| Aspect Ratio | 16:9 |
| Built-in Speakers | Yes (2 x 3W) |
| VESA Mount | Yes (100 x 100 mm) |
| Color Support | 99% sRGB |
| Response Time | 4 ms (gray to gray) |
| Connectivity | 1 x HDMI, 1 x DisplayPort 1.2, 1 x USB 3.0 upstream, 1 x Audio line-out |
| Viewing Angle | 178° (horizontal), 178° (vertical) |
| Adjustability | Height, tilt, swivel |
