Dell S2721HGF User manual

USB cable
power cable
User’s manual
DP cable
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, USB cable, power cable and
other packing materials from the carton.(Note: It
depends on whether users returning the
accessories)
S2
Open the carton with a proper tool.
S1
Take out the monitor from EPE-bag and put the LCD
monitor on a protective cushion.
23
41
Take out the base and molded pulp from the carton.
S3
S4
S6
S5
S7
base
4
3
2
3
1
DELL S2721HGF
Lift the rear cover up carefully. Disconnect the
function key cable and power key cable from the
connectors of the interface board, and then remove
the rear cover.
monitor
stand
1. Disassembly Procedures:
1

S10
DELL S2721HGF
S9
S11
S13
Put the rear cover on a protective cushion. Use a
Philips-head screwdriver to remove 4pcs screws for
unlocking the function key board with the rear cover.
Tear off the key tapes and release the function key
board from the hook of the rear cover.
(No.1~4 screw size=M2x0.2, Torque=0.8±0.2kgfxcm)
Use a Philips-head screwdriver to remove 6pcs
screws for unlocking the middle bezel with the front
bezel. Use a Philips-head screwdriver to remove
13pcs screws for unlocking the middle bezel with the
panel module. tear off 2pcs tapes of the power cable.
(No.1~6 Screw size=M2x3.8,Torque=3±0.5kgfxcm;
No.7~19 Screw size=M3x5, Torque=3~4kgfxcm)
S12
Tear off all the adhesive tapes for releasing the panel
lamp cable, then disconnect the panel cable away
from the connector of the panel module.
1
3
4
2
23
4
1
U
.
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)
Move the bracket, and then disconnect the LVDS
cable and panel lamp cable from the connectors of
the panel module, then lift up the bracket and put it
on a protective cushion.
2

Remove the circuit boards from the
disconnect all
of the cables.
bracket
chassis module carefully, and then
S18
Use a Philips-head screwdriver to remove
screws for unlocking power board and interface
board, and then release the panel lamp 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
Turn over the bracket chassis module. Remove the
Mylar from the hooks of the bracket.
S16
DELL S2721HGF
Lift up the panel module and pull out the front bezel
for releasing the front bezel.
S15
Remove the middle bezel and put it into a fixture jip,
then tear off the black PVC tape and 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)
S14
1
3
4
2
1
56
3

DELL S2721HGF
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.
4

DELL S2721HGF
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
5