Dell U4025QW UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service
Dell U4025QW Manual
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- Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 1
Service Manual - U4025QW Version: 01 Date: 2023/12/26 - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 2
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 - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 3
: 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. 3. Click Contact Us next to the country dropdown. 4. Select the appropriate service or support link based on your need. 5. Choose the method - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 4
3. Wiring Connectivity Diagram To Panel BL LGD 40" WUHD Panel 5120X2160 120Hz HDR Ambient Light Sensor Speaker 2X9W PWR BD Interface Board USB Board AC In HDMI DP1.4 2.1 In In TBT4 Out TBT4 In USB-C Up stream USB A Down Stream #1 USB A Down USB A Down USB A Down Stream #2 Stream #3 - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - 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. Connecting the HDMI cable Connecting the DP cable - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 6
4. How to connect and disconnect power cable/ connectivity cable Connecting the ThunderboltTM 4 cable ThunderboltTM 4 upstream ThunderboltTM 4 Connecting the USB-C® Cable (A to C) Connecting the USB Type-C® cable (C to C) (Optional) - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 7
4. How to connect and disconnect power cable/ connectivity cable Connecting the monitor for ThunderboltTM 4 daisy chain function ThunderboltTM 4 upstream ThunderboltTM 4 downstream ThunderboltTM 4 upstream Connecting the monitor for RJ45 Cable (Optional) ThunderboltTM 4 upstream - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 8
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 - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 9
5. Disassembly and Assembly Procedures Disconnect the lamp cable, speakers' cable, LED cable, FFC cable from the connectors of the board. Use a Philips-head screwdriver to remove 4pcs S8 screw for unlocking the USB unit, then disconnect the eDP cable away from board and release the USB unit from - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 10
5. Disassembly and Assembly Procedures Lift up the middle frame and put it into a fixture, tear S13 off all the cable tape and the mylar tape for releasing the LED key board away from the middle frame. Use a Philips-head screwdriver to remove 9pcs screws for unlocking power board and interface S20 - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 11
the protective film by tearing off S6 all the tapes of screen, then examine the panel surface according to inspection criteria carefully. 6 8 7 Take 1pcs Dell nameplate, then use a locating fixture to fix the nameplate to the bezel of the module, and S7 then move the whole unit into a laminating - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 12
5. Disassembly and Assembly Procedures foam Turn over the panel module to place screen faced down. Take 1pcs panel lamp to plug the two S8 connectors of the panel module, then cover the two connectors with shading tapes, then fix the lamp cable on the back of the panel with 1pcs acetate tape. S11 - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 13
5. Disassembly and Assembly Procedures 2 Take 1pcs USB board, 1pcs eDP cable, 1pcs FFC cable and 1pcs USB bracket. Connect the eDP cable and FFC cable to the connectors of the USB board, and then locate the USB board into the USB bracket, then use a Philips-head screwdriver to tighten 1pcs - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 14
1pcs label on S20 the specific positions as the picture below shown. (No.1~4 screw size=M4x11; Torque=10±1kgfxcm) 2 1 2 3 4 1 Take a stand base close to the monitor. Fit the two tabs on the upper part of the stand into the grooves on S21 the back of the - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 15
5. Disassembly and Assembly Procedures Use a protective bag to pack the stand base, then lift up the monitor to checking the gap between the front S22 bezel with panel, then provide power supply and video signal to the monitor, then turn on the monitor for functionality check. - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 16
No Thunderbolt(140W) Cable The display will go into Standby Mode in 4 minutes. www.dell.com/U4025QW 4. This message also appears during normal system operation if the video cable is disconnected or damaged. 5. Turn o your monitor and reconnect the video cable; then turn on both your computer and the - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 17
6. Trouble Shooting Instructions 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. To run the built-in diagnostics: 1. Ensure that - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 18
Trouble Shooting Instructions Common Problems The following table contains general information about common monitor problems LCD technology. • For more information about Dell Monitor Quality and Pixel Policy, see Dell Support site at: https://www.dell.com/pixelguidelines. • Cycle power on-o . - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 19
6. Trouble Shooting Instructions Common Symptoms What you experience Possible solutions Safety-related issues Visible signs of smoke • Do not perform any troubleshooting or sparks steps. • Contact Dell immediately. Intermittent problems Monitor malfunctions on and o • Ensure that the video - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 20
Trouble Shooting Instructions Common Symptoms What you experience Possible solutions The monitor cannot detect signal connect with dock after AC/DC O /On, cable uplug/ Plug Connect the Dock USB-C® cable to the platform. Connect DUT with TBT4 cable to the Dock USB-C® port.The monitor to monitor, - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 21
Trouble Shooting Instructions Product-speci c problems Problem What you experience Screen image is The image is centered too small on the screen, but does not ll the entire viewing area Cannot adjust OSD does not appear the monitor interface of the device can support DP alternate mode. • - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 22
Trouble Shooting Instructions Problem dropped or Intermittent Possible solutions • Verify if the device can support one of the 5 V/9 V/15 V/20 V/28 V charging the device is over EPR 140 W. • Ensure that you use only the Dell approved adapter or the adapter that comes with the product. • Ensure that - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 23
6. Trouble Shooting Instructions Problem What you experience The LAN port is Operating system , make sure it is set to Enabled. • Ensure that the Ethernet cable is connected securely on the monitor and the hub/router/ rewall. • Check the status LED of the Ethernet cable to con rm connectivity. - Dell U4025QW | UltraSharp 40 Curved Thunderbolt Hub Monitor - Simplified Service - Page 24
6. Trouble Shooting Instructions Universal Serial Bus (USB) speci c problems Speci c Symptoms What you experience Possible solutions USB interface is USB peripherals are not working not working • Check that your display is turned ON. • Reconnect
Version: 01
Date: 2023/12/26
Service Manual - U4025QW