Dell U3421WEB Service Manual
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Dell U3421WEB Service Manual

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Service Manual–U3421WEB
Version: 01
Date:2021/10/08
- 1 -

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Summary of Contents for Dell U3421WEB

  • Page 1 Service Manual–U3421WEB Version: 01 Date:2021/10/08 - 1 -...

  • Page 2: Table Of Contents

    Content Index 1. General Safety Instructions ..................3 1.1 SAFETY: General Safety ..................3 1.2 SAFETY: General Power Safety ................5 2. Exploded view diagram with list of items ..............6 3. Wiring connectivity diagram ..................8 4. How to connect and disconnect power cable/ connectivity cable......9 5.

  • Page 3: General Safety Instructions

    IMPORTANT NOTICE FOR USE IN HEALTHCARE ENVIRONMENTS: Dell products are not medical devices and are not listed under UL or IEC 60601 (or equivalent). As a result, they must not be used within 6 feet of a patient or in a manner that directly or indirectly contacts a patient 1.1 SAFETY: General Safety...
  • Page 4 When operating your equipment:  Do not use your equipment in a wet environment, for example, near a bath tub, sink, or swimming pool or in a wet basement.  Do not use AC powered equipment during an electrical storm. Battery powered devices may be used if all cables have been disconnected.

  • Page 5: Safety: General Power Safety

    Be sure to grasp the plug, not the cable, when disconnecting equipment from an electric  socket. If your equipment uses an AC adapter: Use only the Dell provided AC adapter approved for use with this device. Use of another AC  adapter may cause a fire or explosion. ...

  • Page 6: Exploded View Diagram With List Of Items

    2. Exploded view diagram with list of items Item Description Q'ty Remark Panel ASSY MF PCBA LED DRV BD PCBA SPS BD PCBA I/F BD ASSY BKT MAIN For EMEA Only, not for PCBA CTRL BD other regions SPK*2 ASSY RC ASSY CLMN ASSY BASE PCBA USB BD...
  • Page 7 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 8: Wiring Connectivity Diagram

    3. Wiring connectivity diagram Wire1 FFC 1 Wire3 FFC 2 Wire2 - 8 -...

  • Page 9: How To Connect And Disconnect Power Cable/ Connectivity Cable

    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. Connect/ disconnecting the DisplayPort cable and Power cable Connecting/ disconnecting the HDMI cable and Power cable - 9 -...
  • Page 10 Connecting/ disconnecting the USB Type-C cable and Power cable Connecting/ disconnecting the SuperSpeed USB 5 Gbps (USB 3.2 Gen1) cable and Power cable Connecting/ disconnecting the RJ45 Cable (Optional) and Power cable - 10 -...

  • Page 11: Disassembly And Assembly Procedures

    5. Disassembly and Assembly 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. 5.1 Disassembly SOP Preparation before disassembly 1.
  • Page 12 1. Pull out “CTRL BD FFC” from I/F BD to take off Rear Cover 1. Unplug “Backlight Philips-head Wire” from LED screwdriver Driver BD and tear off a tape from Torsion of Panel (See Red screw: 5~6Kg mark) 2. Unplug “Speaker Wire”...
  • Page 13 1. Unlock 4 screws Philips-head to disassemble screwdriver Main SHD from Panel Torsion of Main SHD screw: 4±0.5Kg 2. Tear off an acetate tape from “FFC EDP” and panel 3. Tear off a yellow tape from “FFC EDP” connector 4. Unplug “FFC EDP”...

  • Page 14: Assembly Sop

    5.2 Assembly SOP Preparation before assembly 1. Clean the room for work 2. Identify the area for material 3. Prepare the implement, equipment, materials as bellow： 1) Working table 2) Philips-head screwdriver 3) Gloves 4) Cleaning cloth 5) ESD protection 6) U3417W Curve Sponge Jig Item Picture...
  • Page 15 Panel and 1. Place U3421WE panel 1. U3417W whole on U3417W curve curve sponge monitor head sponge jig must be put on U3417W curve sponge jig to avoid panel 2. Philips-head damage. screwdriver 2. Insert “FFC EDP into It is not allowed to panel Torsion of...
  • Page 16 1. Insert “Speaker Wire” into I/F BD (See Pink mark) 2. Insert “Backlight Wire” into LED Driver BD and fix it on Panel by tape*1 (See Red mark) 1. Insert “CTRL FFC” into I/F BD 1. Assemble Rear Cover with Middle Frame 2.
  • Page 17 1. Insert the stand base blocks fully into the stand slot 2. Lift the screw handle and turn the screw clockwise 3. After fully tightening the screw, fold the screw handle flat within the recess Attach the stand assembly to the monitor a.

  • Page 18: Trouble Shooting Instructions

    6. Trouble shooting instructions - 18 -...
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