Dell S2721DGF User manual

Wedge your fingers between the rear cover and the

middle bezel on the corners of the top side of the

monitor to release the rear cover, then use one hand

to press the middle bezel, the other hand to pull up

carefully the rear cover in order of arrow preference

for unlocking mechanisms of rear cover.

Use a Philips-head screwdriver to remove four

screws for unlocking mechanisms.

(No.1~4 screw size=M4x8; Torque=10~11kgfxcm)

Take out all accessories including QSG, user’s

manual, DP cable, HDMI cable, USB cable, power

cable and other packing materials from the

carton.(Note: It depends on whether users returning

the accessories)

Open the carton with a proper tool.

Take out the monitor from EPE-bag and put the LCD

monitor on a protective cushion.

Take out the base and molded pulp from the carton.

QSG

USB cable DP cable

power cable User’s manual

base

stand

HDMI cable

DELL S2721DGF

Lift the rear cover up carefully. Disconnect the USB

FFC cable, joystick key cable and power key cable

from the connectors of the interface board, and then

disconnect the back LED light bar cable from the

connector of the power board, and then remove the

rear cover.

monitor

stand

1. Disassembly Procedures:

S10

2DELL S2721DGF

Use a Philips-head screwdriver to remove one screw

for unlocking the USB board unit, then release the

USB board unit and put it aside.

(No.1 screw size=M3x6, Torque=4±0.5kgfxcm)

Tear off all the mylar and tapes, then use a Philips-

head screwdriver to remove 7pcs screws for

releasing the diffuser, reflector and LGP.

Remove the middle bezel and put it into a fixture jip,

then use a Philips-head screwdriver to remove 1pcs

screw for unlocking the power key board with the

front bezel.

(No.1 Screw size= M2x2.4, Torque=0.8±0.2kgfxcm)

S11

S13

Use a Philips-head screwdriver to remove 4pcs

screws for unlocking the joystick key board with the

rear cover. Tear off the joystick key tapes and release

the joystick key board from the hook of the rear cover.

(No.1~4 screw size=M2x0.2, Torque=0.8±0.2kgfxcm)

Tear off the mylar tape on the position as the picture

below shown. Use a Philips-head screwdriver to

remove 13pcs screws for unlocking the middle bezel

with the panel module. Use a Philips-head

screwdriver to remove 2pcs screws for unlocking the

middle bezel with the front bezel.

(No.1~13 Screw size= M3x5, Torque=3~4kgfxcm;

No.14~15 Screw size= M2x2.7,Torque=1~2kgfxcm)

S12

Tear off all the adhesive tapes for releasing the panel

lamp cable, then disconnect the cable away from the

connectors of the power board and panel.

Remove the circuit boards from the

disconnect all

of the cables.

bracket

chassis module carefully, and then

S18

Turn over the bracket chassis module. Use a Philips-

head screwdriver to remove screws for

unlocking power board and interface board, and

then release the EDP cable from the hook of the

bracket.

6pcs

(No.1 screw size=M4x8, Torque=6±0.5kgfxcm;

No.2~7 screw size=M3x7.5, Torque=6±0.5kgfxcm)

S17

DELL S2721DGF

Lift up the panel module and pull out the front bezel

for releasing the front bezel.

se a Philips-head screwdriver to remove 4pcs

screws for locking the bracket chassis module with

the panel

(No.1~4 Screw size= M3x0.5x2.8, Torque=5~6kgfxcm)

S14

S15

Tear off the adhesive tape, and then disconnect the

EDP cable from the connector of the panel module,

then put the bracket chassis on a protective cushion.

S16

4DELL S2721DGF

Remove electrolyte capacitors (red mark) from

printed circuit boards.

S19

S19-1 Cut the glue between bulk cap. and PCB with a knife.

S19-2 Ensure cutting path within the glue, don’t touch bulk

cap. or PCB.

S19-4 Take out bulk cap. pin solder with soldering iron and

absorber.

S19-5 Lift the bulk cap. up and away from the PCB.

S19-3 Cut into the bottom of bulk cap. and pullit up

carefully.

DELL S2721DGF

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 HC

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 (Phillip head) #1

- Screwdriver (Phillip head) #2

- Penknife

- Soldering iron and absorber

2. Product material information

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