Dell P2421B Manual

ELL

P2421

1. Disassembly Procedures

Turn off the monitor.

Place the monitor on a soft cloth or

cushion.

Press and hold the stand release

button.

Lift the stand up and away from the

monitor.

Unlock 4 screws on Rear Cover

( crew Torque: 8.5±1.0kgf)

Disassemble Rear Cover from the

monitor

Notice the disassembly order:

1) Disassemble the Top part

2) Disassemble the Left / Right part

3) Disassemble the Bottom part

4) Remove RC from Mid-Frame

Tear off the small aluminum foil from

Main HD

Tear off the acetate adhesive tape from

Panel

Pull out CTRL BD FFC cable from I/F

BD and tear off it from Main HD

Pull out U B BD cable from I/F BD and

U B BD

Unlock 5 BZL TRIM screws

( crew Torque: 2.0±0.5kgf)

ELL

P2421

Disassemble BZL TRIM from

Mid-Frame

S10

Tear off CTRL BD Mylar from CTRL BD

S11

Unlock 3 CTRL BD screws

( crew Torque: 1.2±0.5kgf)

S12

Disassemble CTRL BD, O D Button

and PWR Button

S13

Tear off 2 large acetate adhesive tapes

from the Panel

S14

Unlock 9 MF screws

( crew Torque: 4.0±0.5kgf)

S15

Pull out LED Backlight wire from P

BD and Panel

S16

Tear off aluminum foil and tape from

LVD cable

Pull out the LVD cable from Panel.

S17

Disassemble Mid-Frame from Panel

ELL

P2421

S18

Unlock U B BD screw and disassemble

U B BD from Mid-Frame

( crew Torque: 4.5±0.5kgf)

S19

Remove afety Mylar from P BD

S20

Unlock 6 PCBA screws from PCBA

( crew Torque: 6.5±1.0kgf)

S21

Unlock 4 hexagonal screws from Main

( crew Torque: 5.0±0.6kgf)

S22

Disassemble I/F BD from Main HD and

unplug P BD wire

S23

Unplug FFC LVD cable from I/F BD

S24

Disassemble P BD from Main HD

ELL

P2421

S13

Remove electrolyte capacitors (red mark) from printed circuit boards

13-1 Cut the glue between bulk cap. and PCB with a knife

13-2 Ensure cutting path within the glue, don’t touch bulk cap. or PCB

ELL

P2421

13-3 Take out bulk cap. pin solder with soldering iron and absorber

13-4 Lift the bulk cap. up and away from the PCB

ELL

P2421

2. 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.

Capacitors / condensers (containing

PCB/PCT)

No used

Mercury containing components

No used

Batteries No used

Printed circuit boards (with a surface greater

than 10 square cm)

Product has printed circuit boards

(with a surface greater than 10 square

cm)

Component contain toner, ink and liquids No used

Plastic containing BFR

No used

Component and waste contain asbestos

No used

CRT No used

Component contain CFC, HCFC, HFC and

No used

Gas discharge lamps

No used

LCD display > 100 cm2 Product has an LCD greater than 100

cm2

External electric cable Product has external cables

Component contain refractory ceramic fibers

No used

Component contain radio

active substances

No used

Electrolyte capacitors (height

> 25mm, diameter > 25mm)

Product has electrolyte capacitors

(height >25mm, diameter > 25mm)

3. Tools Required

List the type and size of the tools that would typically can be used to disassemble the

product to a point where components and materials requiring selective treatment can be

removed.

Tool Description:

- Screwdriver

- Scraper Bar

- Penknife

- Soldering iron and absorber

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