2024年4月22日发(作者：郑问薇)
1. Disassembly Procedures:
Open the carton with a proper tool.
S1
Take out all accessories including QSG, user’s
manual, DP cable, HDMI cable, USB cable, power
S2
cable and other packing materials from the
carton.(Note: It depends on whether users returning
the accessories)
power cable
base
QSG
User’s manual
USB cable
DP cable
HDMI cable
Take out the base and molded pulp from the carton.
S3
stand
monitor
stand
Take out the monitor from EPE-bag and put the LCD
S4
monitor on a protective cushion.
DELL S2721DGF
1
Use a Philips-head screwdriver to remove four
S5
screws for unlocking mechanisms.
(No.1~4 screw size=M4x8; Torque=10~11kgfxcm)
2
3
4
1
Wedge your fingers between the rear cover and the
middle bezel on the corners of the top side of the
S6
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.
1
2
3
3
4
Lift the rear cover up carefully. Disconnect the USB
FFC cable, joystick key cable and power key cable
S7
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.
2
DELL S2721DGF
Use a Philips-head screwdriver to remove one screw
S8
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)
1
Use a Philips-head screwdriver to remove 4pcs
screws for unlocking the joystick key board with the
S9
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)
1
2
3
4
Tear off all the mylar and tapes, then use a Philips-
S10
head screwdriver to remove 7pcs screws for
releasing the diffuser, reflector and LGP.
1
4
2
5
3
6
7
Tear off all the adhesive tapes for releasing the panel
S11
lamp cable, then disconnect the cable away from the
connectors of the power board and panel.
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
S12
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)
Remove the middle bezel and put it into a fixture jip,
then use a Philips-head screwdriver to remove 1pcs
S13
screw for unlocking the power key board with the
front bezel.
(No.1 Screw size= M2x2.4, Torque=0.8±0.2kgfxcm)
1
S14
Lift up the panel module and pull out the front bezel
for releasing the front bezel.
Use a Philips-head screwdriver to remove 4pcs
S15
screws for locking the bracket chassis module with
the panel
.
(No.1~4 Screw size= M3x0.5x2.8, Torque=5~6kgfxcm)
2
3
1
4
Tear off the adhesive tape, and then disconnect the
S16
EDP cable from the connector of the panel module,
then put the bracket chassis on a protective cushion.
DELL S2721DGF
3
Turn over the bracket chassis module. Use a Philips-
head screwdriver to remove
6pcs
screws for
unlocking power board and interface board, and
S17
then release the EDP cable from the hook of the
bracket.
(No.1 screw size=M4x8, Torque=6
±0.5
kgfxcm;
No.2~7 screw size=M3x7.5, Torque=6
±0.5
kgfxcm)
5
6
3
2
1
4
Remove the circuit boards from the bracket
S18
chassis module carefully, and then disconnect all
of the cables.
4
DELL S2721DGF
S19
Remove electrolyte capacitors (red mark) from
printed circuit boards.
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.
S19-3 Cut into the bottom of bulk cap. and pullit up
carefully.
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.
DELL S2721DGF
5
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)
Mercury containing components
Batteries
No used
No used
No used
Printed circuit boards (with a surface Product has printed circuit boards (with a
greater than 10 square cm) surface greater than 10 square cm)
Component contain toner, ink and
liquids
Plastic containing BFR
Component and waste contain
asbestos
CRT
Component contain CFC, HCFC, HFC
and HC
Gas discharge lamps
LCD display > 100 cm2
External electric cable
Component contain refractory
ceramic fibers
Component contain radio-active
substances
Electrolyte capacitors (height
> 25mm, diameter > 25mm)
No used
No used
No used
No used
No used
No used
Product has an LCD greater than 100 cm2
Product has external cables
No used
No used
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
2024年4月22日发(作者：郑问薇)
1. Disassembly Procedures:
Open the carton with a proper tool.
S1
Take out all accessories including QSG, user’s
manual, DP cable, HDMI cable, USB cable, power
S2
cable and other packing materials from the
carton.(Note: It depends on whether users returning
the accessories)
power cable
base
QSG
User’s manual
USB cable
DP cable
HDMI cable
Take out the base and molded pulp from the carton.
S3
stand
monitor
stand
Take out the monitor from EPE-bag and put the LCD
S4
monitor on a protective cushion.
DELL S2721DGF
1
Use a Philips-head screwdriver to remove four
S5
screws for unlocking mechanisms.
(No.1~4 screw size=M4x8; Torque=10~11kgfxcm)
2
3
4
1
Wedge your fingers between the rear cover and the
middle bezel on the corners of the top side of the
S6
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.
1
2
3
3
4
Lift the rear cover up carefully. Disconnect the USB
FFC cable, joystick key cable and power key cable
S7
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.
2
DELL S2721DGF
Use a Philips-head screwdriver to remove one screw
S8
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)
1
Use a Philips-head screwdriver to remove 4pcs
screws for unlocking the joystick key board with the
S9
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)
1
2
3
4
Tear off all the mylar and tapes, then use a Philips-
S10
head screwdriver to remove 7pcs screws for
releasing the diffuser, reflector and LGP.
1
4
2
5
3
6
7
Tear off all the adhesive tapes for releasing the panel
S11
lamp cable, then disconnect the cable away from the
connectors of the power board and panel.
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
S12
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)
Remove the middle bezel and put it into a fixture jip,
then use a Philips-head screwdriver to remove 1pcs
S13
screw for unlocking the power key board with the
front bezel.
(No.1 Screw size= M2x2.4, Torque=0.8±0.2kgfxcm)
1
S14
Lift up the panel module and pull out the front bezel
for releasing the front bezel.
Use a Philips-head screwdriver to remove 4pcs
S15
screws for locking the bracket chassis module with
the panel
.
(No.1~4 Screw size= M3x0.5x2.8, Torque=5~6kgfxcm)
2
3
1
4
Tear off the adhesive tape, and then disconnect the
S16
EDP cable from the connector of the panel module,
then put the bracket chassis on a protective cushion.
DELL S2721DGF
3
Turn over the bracket chassis module. Use a Philips-
head screwdriver to remove
6pcs
screws for
unlocking power board and interface board, and
S17
then release the EDP cable from the hook of the
bracket.
(No.1 screw size=M4x8, Torque=6
±0.5
kgfxcm;
No.2~7 screw size=M3x7.5, Torque=6
±0.5
kgfxcm)
5
6
3
2
1
4
Remove the circuit boards from the bracket
S18
chassis module carefully, and then disconnect all
of the cables.
4
DELL S2721DGF
S19
Remove electrolyte capacitors (red mark) from
printed circuit boards.
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.
S19-3 Cut into the bottom of bulk cap. and pullit up
carefully.
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.
DELL S2721DGF
5
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)
Mercury containing components
Batteries
No used
No used
No used
Printed circuit boards (with a surface Product has printed circuit boards (with a
greater than 10 square cm) surface greater than 10 square cm)
Component contain toner, ink and
liquids
Plastic containing BFR
Component and waste contain
asbestos
CRT
Component contain CFC, HCFC, HFC
and HC
Gas discharge lamps
LCD display > 100 cm2
External electric cable
Component contain refractory
ceramic fibers
Component contain radio-active
substances
Electrolyte capacitors (height
> 25mm, diameter > 25mm)
No used
No used
No used
No used
No used
No used
Product has an LCD greater than 100 cm2
Product has external cables
No used
No used
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