Dell U3421web 34 Inch Ultrasharp Curved Usb-c Monitor Instruction Manual

DELL U3421WEB

Disassembly Procedures

S1 Turn off power
S2 To remove the stand:

1. Place U3421WE monitor on U3417Wcurve sponge jig.
2. Press and hold the stand release button.
3. Lift the stand up and away from the monitor.

S3 Unlock 4 screws on Rear Cover

(Screw Torque:11±1Kgf)

S4 Use hands or Bar Scraper to disassemble Rear Cover from Middle Frame

Notice the disassembly order:
Left Side=>Top Side =>Right Side =>Bottom Side

S5 Pull out “CTRL BD FFC” from I/F BD to take off Rear Cover

S6 Tear off a tape from Rear Cover
Tear off “CTRL FFC” from Rear Cover
Unlock 3 screws to disassemble CTRL BD from Rear Cover

(Screw Torque: 1.5-2.0Kgf)

S7 Unplug “Backlight Wire” from LED
Driver BD and tear off a tape from Panel (See Red mark)
Unplug “Speaker Wire” from I/F BD (See Pink remark)
Tear off 5 tapes from “Speaker Wire” and Panel (See Green Mark)
Unlock 6 screws to disassemble Speaker from Middle Frame (See yellow mark)

(Screw Torque: 5~6Kgf)

S8 Tear off a conduct tape from Main SHD and Panel

S9 Tear off an acetate tape from “USB BD Wire” and Panel
Unplug “USB BD FFC” and “USB BD Wire” from I/F BD
Unlock 1 screw to disassemble USB BD from Middle Frame
Unplug “USB BD FFC” and “USB BD Wire” from USB BD

S10 Disassemble a gasket from Panel

S11 Unlock 4 screws to disassemble Main SHD from Panel

(Screw Torque: 4±0.5Kgf)

S12 Tear off an acetate tape from “FFC EDP” and panel

S13 Tear off a yellow tape from the “FFC EDP” connector
Unplug “FFC EDP” from panel
Take off Main SHD from Panel

S14 Unlock 21 screws to disassemble.
Middle Frame from Panel.

(Screw Torque: 4.0-4.5Kgf)

S15 Tear off 4 tapes from “Backlight Wire”

S16 Unplug “Backlight Wire” from panel.
Disassemble 8 pieces of “BOSS PANEL” from the panel.

S17 Disassemble Mylar from Main SHD

S18 Unlock 10 PCBA screws to disassemble “I/F BD”, “SPS BD” and “LED Driver BD” from Main SHD

(Screw Torque: 9±1Kgf)

S19 Unplug wires from I/F BD, SPS BD and LED Driver BD

S20 Remove electrolyte capacitors (red mark) from printed circuit boards

S20-1 Cut the glue between bulk caps. and PCB with a knife

S20-2 Ensure cutting path within the glue, don’t touch bulk cap. or PCB

S20-3 Take out bulk cap. pin solder with soldering iron and absorber

S20-4 Lift the bulk cap. up and away from the PCB

Product material information

The following substances, preparations, or components should be disposed of or recovered separately from other WEEE in compliance with Article 4 of EU Council Directive  75/442/EEC.

Tools Required

List the type and size of the tools that would typically be used to disassemble the product to a point where components and materials requiring selective treatment can be removed.
Tool Description:

• Screwdriver
• Penknife
• Bar scraper
• U3417W Curved Sponge Jig