Dell U2722DE Service Manual
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Dell U2722DE Service Manual

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Service Manual - U2722DE
Version: 01
Date: 2021/10/30

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Summary of Contents for Dell U2722DE

  • Page 1 Service Manual - U2722DE Version: 01 Date: 2021/10/30...

  • Page 2: Important Safety Notice

    1. Important Safety Notice Product Announcement: ! To ensure using a proper screwdriver, follow the This product is certificated to meet RoHS torque and force listed in assembly and Directive and Lead-Free produced definition. disassembly procedures to unscrew screws. Using approved critical components only is ! Using Lead-Free solder to well mounted the recommended when the situation to replace parts.
  • Page 3 USB-C 1.0 M cable (C to C) 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.
  • Page 4 3. Wiring Connectivity Diagram...
  • Page 5 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.
  • Page 6 4. How to connect and disconnect power cable/ connectivity cable...
  • Page 7 4. How to connect and disconnect power cable/ connectivity cable...

  • Page 8: Disassembly And Assembly Procedures

    This “Disassembly and Assembly Procedures” is for EMEA only, joystick key cable from the connector of the interface not for other regions. Please note that Dell will deem warranty void board, and then remove the rear cover and put it if any disassembly is done on the monitors.
  • Page 9 5. Disassembly and Assembly Procedures Use a Philips-head screwdriver to remove 13pcs screws for unlocking the middle bezel with the panel module. (No.1~13 screw size=M3x5, Torque=5 0.5kgfxcm) ± se a Philips-head screwdriver to remove 4pcs screws for unlocking the bracket chassis module with the panel (No.1~4 Screw size= M3x5, Torque=5±0.5kgfxcm) Disconnect the panel lamp from the connector of the...
  • Page 10 5. Disassembly and Assembly Procedures Remove the Mylar tape from the hooks of the bracket. Use a Philips-head screwdriver to remove 6pcs screws for interface board and power board. (No.1 screw size=M4x8, Torque=7 kgfxcm; ±1 No.2~6 screw size=M3x7.5, Torque=7 kgfxcm) ±1 Remove the power board board and interface board from the...
  • Page 11 5. Disassembly and Assembly Procedures Take a black mylar to insert the hooks of the bracket 5.2 Assembly Procedures: Place a bracket chassis base on a protective to cover the power board, then tear off the gum cushion, then stick 4pcs Silicon sheets on the paper of the panel lamp cable and locate the cable positions as the picture below shown.
  • Page 12 5. Disassembly and Assembly Procedures Move the middle bezel with the LED board close to the panel unit, then assemble the middle bezel with the front bezel and panel module. Adjust the bracket chassis module, and then u se a Philips-head screwdriver to tighten 4pcs screws for locking the bracket chassis module with the panel (No.1~4 Screw size= M3x5, Torque=5±0.5kgfxcm)
  • Page 13 5. Disassembly and Assembly Procedures Take 1pcs USB board, 2pcs cables and 1pcs Take 1pcs joystick key and 1pcs OSD board, assemble the joystick key with the OSD board. conductive foam. Connect the 2pcs cables to the Locate the board to the correct position of the rear connectors of the Usb board, then turn over the cover, then use a Philips-head screwdriver to tighten board and paste the conductive foam on the back of...
  • Page 14 5. Disassembly and Assembly Procedures Use a Philips-head screwdriver to tighten 4pcs screws for locking the rear cover with the unit. Stick two pieces of label on the specific positions, then insert 2pcs DP out Caps into the DP out connectors. (No.1~4 screw size=M4x11;...

  • Page 15: Troubleshooting Instructions

    No HDMI Cable The display will go into Standby Mode in 4 minutes. www.dell.com/U2722D/DX/DE (U2722DE only) No USB-C Cable The display will go into Standby Mode in 4 minutes. www.dell.com/U2722D/DX/DE 4. This box also appears during normal system operation if the video cable becomesdisconnected or damaged.

  • Page 16: Common Problems

    • Cycle power on-off. spots • 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 •...
  • Page 17 6. Trouble Shooting Instructions Common What You Possible Solutions Symptoms Experience Intermittent Monitor • Ensure that the video cable connecting the Problems malfunctions on monitor to the computer is connected properly & off and is secure. • Reset the monitor to factory settings. •...

  • Page 18: Product Specific Problems

    • Verify if the device required more than 90 W to computer, power charging. laptop, and so • USB-C interface of device cannot support DP alternate mode. (U2722DE only) • Set Windows to Projection mode. • Ensure that the USB-C cable is not damaged.
  • Page 19 USB-C connection. (U2722DE only) • 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 Intermittent •...

  • Page 20: Universal Serial Bus (Usb) Specific Problems

    6. Trouble Shooting Instructions Universal Serial Bus (USB) Specific Problems Specific What You Possible Solutions Symptoms Experience USB interface is USB peripherals • Check that your display is turned ON. not working are not working • Reconnect the upstream cable to your computer.

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