Dell S2722DGM Istruzioni per l’uso

Product Announcement:

This product is certificated to meet RoHS

Directive and Lead-Free produced definition.

Using approved critical components only is

recommended when the situation to replace

defective parts. Vender assumes no liability

express or implied, arising out of any unauthorized

modification of design or replacing non-RoHS

parts. Service providers assume all liability.

Qualified Repairability:

Proper service and repair is important to the safe,

reliable operation of all series products. The

service providers recommended by vender should

be aware of notices listed in this service manual in

order to minimize the risk of personal injury when

perform service procedures. Furthermore, the

possible existed improper repairing method may

damage equipment or products. It is recommended

that service engineers should have repairing

knowledge, experience, as well as appropriate

product training per new model before performing

the service procedures.

NOTICE:

! To avoid electrical shocks, the products should be

connected to an authorized power cord, and turn

off the master power switch each time before

removing the AC power cord.

! To prevent the product away from water or

expose in extremely high humility environment.

! To ensure the continued reliability of this

product, use only original manufacturer’s

specified parts.

! To ensure following safety repairing behavior, put

the replaced part on the components side of

PWBA, not solder side.

! To ensure using a proper screwdriver, follow the

torque and force listed in assembly and

disassembly procedures to unscrew screws.

! Using Lead-Free solder to well mounted the

parts.

! The fusion point of Lead-Free solder requested in

the degree of 220°C.

1. Important Safety Notice

2. Exploded view diagram with list of items

3. Wiring Connectivity Diagram

AC Input HDMI1 HDMI2 DP IN

Headphone

Out

LED Driver Panel

2560*1440

LED Board

Touch Board

Joystic Board

Power key Board

Interface board

Power board

4. Disassembly and Assembly Procedures

4.1 Disassembly Procedures:

Necessary repair and test equipment:

1. Philips-head screwdriver

Remove the monitor stand base:

1. Place the monitor on a soft cloth or cushion.

2. Press and hold the stand-release button.

3. Lift the stand up and away from the monitor.

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)

Lift the rear cover up carefully. Disconnect the

function key cable and LED cable from the

connectors of the interface board, and then remove

the rear cover.

Put the rear cover on a protective cushion. Tear off

the shading tape, then release the diffusion sheet

from the hook of the rear cover. Use a Philips-head

screwdriver to remove 4pcs screws for unlocking the

function key board with the rear cover. Tear off 2pcs

tapes for releasing the function key cable, then

release the function key board from the hook of the

rear cover.

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

Tear off 1pcs aluminum foil for uncovering the LVDS

connector and cables, then tear off the tapes to

disconnect the panel cable away from the connector

of the panel module. Disconnect the power key cable

and touch key cable from the connectors of the

interface board.

4. Disassembly and Assembly Procedures

S10

S11

Tear off 2pcs tapes of the power cable. 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.

(No.1~6 Screw size=M2x3.3,Torque=3±0.5kgfxcm;

No.7~19 Screw size=M3x5, Torque=3~4kgfxcm)

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

then tear off the tape for releasing the touch key

board away from the middle bezel. 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)

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)

Move the bracket, and then disconnect the LVDS

cable from the connector of the panel module, then

lift up the bracket and put it on a protective cushion.

4. Disassembly and Assembly Procedures

S14

S12

S13

Remove the circuit boards from the

disconnect all

of the cables.

bracket

chassis module carefully, and then

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)

Turn over the bracket chassis module. Remove the

Mylar from the hooks of the bracket.

4. Disassembly and Assembly Procedures

Take 1pcs power board, then connect 1pcs panel

lamp cable to connect with the power board. Turn

over the power board and put it into the bracket.

Place a bracket chassis base on a protective

cushion, then stick 1pcs Silicon sheet on the position

as the picture below shown.

4.2 Assembly Procedures:

Take 1pcs interface board, connect 1pcs LVDS cable

to the connector of the interface board, then connect

the connective cable to the interface board. Turn over

the interface board and locate it into the bracket. Use

a Philips-head screwdriver to tighten 6pcs screws for

locking the circuit board, then locate the panel lamp

cable into the hook of the bracket.

(No.1 screw size=M4x8, Torque=7±0.5kgfxcm;

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

Panel preparation: Take out 1pcs panel module from

the carton, then remove the protective film by tearing

off the tapes, and then examine the panel surface

according to inspection criteria. Turn over the panel,

and then place screen faced down for later

assembling.

Take 1pcs mylar to insert the hooks of the bracket to

cover the power board, then locate the panel lamp

cable into the hook as the picture below shown.

Put the bracket chassis module on the back of the

panel module. Push the earing-locks and then

connect the LVDS cable to the connector of the

panel module.

4. Disassembly and Assembly Procedures

Use a Philips-head screwdriver to tighten 6pcs

screws for locking the middle bezel with front bezel.

(No.1~6 Screw size=M2x3.3, Torque=1.2±0.2kgfxcm)

S10

Take 1pcs power key board and 1pcs middle bezel,

then locate the power key board to the specific

position of the middle bezel. Put the unit into a fixture,

and then use a Philips-head screwdriver to tighten

1pcs screw for locking the power key board with the

middle bezel. Cover the power key board with 1pcs

black adhesive tape.

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

Assemble the middle bezel with power key board and

touch key board with the front bezel and panel unit.

S11

S12

Adjust the bracket chassis module, and then u

se a

Philips-head screwdriver to tighten 4pcs screws for

locking the bracket chassis module with the panel

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

S13

Fix the power key cable by tear off 2pcs tape papers

on the back of the cable. Use a Philips-head

screwdriver to tighten 13pcs screws for locking the

middle bezel with the panel module.

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

Take 1pcs touch key board, and tear off the release

paper on the specific position of the middle bezel, and

then paste the touch key board on the middle bezel.

Take 1pcs front bezel, lift up the panel module and

then assemble the front bezel with the panel.

4. Disassembly and Assembly Procedures

Locate the function key board with Joystick key to the

specific position of the rear cover, then use a Philips-

head screwdriver to tighten 4pcs screws for locking

the function key board with the rear cover. Tear off the

tape papers on the back of the key cable, and then fix

the key cable with 2pcs tapes. Paste 1pcs shading

tape to cover the diffusion sheet.

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

S18

Take 1pcs joystick key and 1pcs function key board,

assemble the joystick key with the function key board,

then press the joystick key to check if it work

normally.

S15

Take 1pcs rear cover, then put the rear cover on a

cushion foam for later assembling. Take 1pcs

diffusion sheet, plug 1pcs LED cable to the connector

of the diffusion sheet .

S16

Move the assembled rear cover with function key

board close to the assembled unit, then connect

function key cable and LED cable to the connectors

of the board. Put down the rear cover and push

the rear cover for mechanisms engagement.

Tear off the tape paper on the back of the panel lamp

cable, then connect the panel lamp to the connector

of the panel, and then fix the lamp cable with tapes.

Connect the touch key cable and power key cable to

the connectors of board. Paste 1pcs aluminum foil to

fix the cover the LVDS connector and cables as the

picture below shown.

S14

Tear off the adhesive tape paper of the diffusion

sheet, then locate and fix the diffusion sheet with LED

cable on the hook of the rear cover.

S17

S19

4. Disassembly and Assembly Procedures

Take a stand close to the monitor. Fit the two tabs on

the upper part of the stand into the grooves on the

back of the monitor, and then lower the stand so that

the monitor mounting area snaps onto the stand.

Lift up the monitor to checking the gap between the

front bezel with panel module , then provide power

supply and a video signal to the monitor

, then turn on

the monitor for functionality check.

Use a Philips-head screwdriver to tighten 4pcs

screws for locking the rear cover with the assembled

unit. Paste 2pcs labels on the specific positions.

(No.1~4 screw size=M4x10; Torque=9±0.5kgfxcm)

S21

S20

Take 1pcs base, assemble the base with the stand,

then use a screwdriver to tighten the detached screw

clockwise for locking the stand with base.

S22

S23

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