Dell SE2422H Gebrauchsanweisung

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

Power Board

KB1

Interface Board

VGAHDMI

Function key board

23.8 inch Panel 1920x1080

4. Disassembly and Assembly Procedures

4.1 Disassembly Procedures:

Necessary repair and test equipment:

1. Philips-head screwdriver

2. Hex-head screwdriver

S1S1

Remove the monitor stand base:

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

2. Press the stand down to access to the stand

release button.

3. Use a long screwdriver to press the release latch.

4. While pressing the release latch, slide out the

stand assembly from the monitor.

Turn over the LCD monitor to let the screen faced

up, place a cloth on the panel where you are working

on to protect the panel. Continually, wedge your

fingers between the front bezel and the panel in

order of arrow preference for unlocking

mechanisms. Turn over the LCD monitor to let the

screen faced down and then remove the rear cover.

Use a Philips-head screwdriver to remove 6pcs

screws for unlocking mechanisms.

(No.1~4 screw size=M4x11; Torque=11 1kgfxcm;

No.5~6 screw size=M4x6; Torque=11 1kgfxcm)

Disconnect the function key cable away from the

connector of the board, then tear off 3pcs adhesive

tape for releasing the function key board.

Use a Philips-head screwdriver to remove 2pcs

screws for unlocking the bracket with panel module.

Use a Hex-head screwdriver to remove 2pcs screws

for unlocking the VGA connector.

(No.1~2 screw size=M3x2.6, Torque=4 0.5kgfxcm;

No.3~4 screw size=M3x8, Torque=6±0.5kgfxcm)

Tear off 2pcs aluminum foils for unlocking panel

lamp cable and LVDS cable, and then disconnect

the panel lamp cable away from the connector of

panel module.

4. Disassembly and Assembly Procedures

S10

S11

S13

S12

Tear off the mylar tape, then ut the front bezel into a

fixture, then u

se a Philips-head screwdriver to

remove 3pcs screws for unlocking the function key

board with the front bezel.

(No.1~3 screw size=M2x2.4, Torque=0.8±0.2kgfxcm

Use a Philips-head screwdriver to remove 4pcs

screws for unlocking the circuit board, release all the

cables from the hooks.

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

No. 2~4 screw size=M3x7.5, Torque=6±0.5kgfxcm)

Remove the Mylar from the hooks of the bracket

chassis module.

Remove the interface board and power board from

the bracket chassis module carefully, and disconnect

all the cables.

Unplug the LVDS cable from the connector of the

panel module by pushing the earing-locks.

Release the panel module away from the hooks of

the front bezel, then l

ift up the panel module and

take away the front bezel with key board

ift up the bracket chassis and put it on a protective

cushion

4. Disassembly and Assembly Procedures

Take a mylar to insert the hooks of the bracket to

cover the power board.

Take 1pcs panel module, then put the panel into the

front bezel and locate the panel into the hooks of the

front bezel for the two parts firmly attached.

Turn over a power board and put the power board

into the bracket chassis, locate the panel power

cable into the hook of the bracket chassis.

Place a bracket chassis base on a protective

cushion.

4.2 Assembly Procedures:

Take a interface board, connect a LVDS cable to the

connector of the interface board, then connect the

cable of the power board to the connector of the

interface board. Turn over the interface board and

locate it into the bracket. Use a Philips-head

screwdriver to tighten 4pcs screws for locking the

power board and interface board.

(No.1 screw size=M4x8, Torque=5±0.5kgfxcm;

No.2~4 screw size=M3x7.5, Torque=5±0.5kgfxcm)

The following two steps (S6 and S7) is processed in

LCM assemble line. Take 1pcs function key board

and 1pcs front bezel from the carton, then put the

middle bezel into a fixture, and locate the function

keyboard into the hooks of the front bezel Use a

Philips-head screwdriver to tighten 3pcs screws for

locking the function key board with the front bezel,

then paste 1pcs black mylar tape to cover the

function key board.

(No.1~3 screw size=M2x2.4, Torque=0.8±0.2kgfxcm

4. Disassembly and Assembly Procedures

Adjust the bracket chassis to the correct position,

then use a Philips-head screwdriver to tighten 2pcs

screws for locking the bracket with panel module.

Use a Hex-head screwdriver to lock 2pcs screws for

locking the VGA connector.

(No.1~2 screw size=M3x2.6, Torque=4 0.5kgfxcm;

No.3~4 screw size=M3x8, Torque=6±0.5kgfxcm)

S13

S10

S12

Connect the function key cable to the connector of

board, then tear off the 3pcs double-faced tape on

the back of the back and fix the cable on the bracket

as the picture below shown.

Take out 1pcs panel assembled module with front

bezel and function key board from the carton, and

then examine the panel surface according to

inspection criteria. Turn over the panel, and then

place screen faced down for later assembling.

Move the bracket close to the panel, then connect

LVDS cable to the connector of the panel. Turn over

the bracket and put it on the back of panel.

S11

Paste 1pcs aluminum foil on the specific position to

fix the LVDS cable as the picture below shown.

Connect the panel lamp cable to the connector of

the panel module, then paste 1pcs aluminum foil to

fix the panel lamp cable as the picture below shown.

4. Disassembly and Assembly Procedures

Use a Philips-head screwdriver to tighten 4pcs

screws for locking rear cover with the assembled

unit, to tighten 2pcs screws for locking the rear cover

with bracket chassis module.

(No.1~4 screw size=M4x11; Torque=10 12kgfxcm;

No.5~6 screw size=M4x6; Torque=10 12kgfxcm)

Take 1pcs rear cover, put down the rear cover

and push the rear cover on the positions marked

as the picture below shown for mechanisms

engagement.

S15

S14

front bezel with panel module , then provide power

supply and a video signal to the monitor, then turn

on the monitor for functionality check.

ift up the monitor to checking the gap between the

S17

Stick 2pcs labels on the specific positions as the

picture below shown. Take 1pcs stand riser and

1pcs stand base, assemble the stand base with

stand riser. Insert the stand-riser into monitor groove

until it snaps into its place.

S16

5. Trouble Shooting Instructions

Self-test

Your monitor provides a self-test feature that allows you to check whether your

monitor is functioning properly. If your monitor and computer are properly connected

but the monitor screen remains dark, run the monitor self-test by performing the

following steps:

1. Turn o both your computer and the monitor.

2. Unplug the video cable from the back of the computer. To ensure proper Self-Test

operation, remove all video cables from the back of computer.

3. Turn on the monitor.

If the monitor is working correctly and detects no input signal, depending on the

connectivity, one of the following dialog appears. While in self-test mode, the power

LED remains white.

The display will go into Standby mode in 4 minutes.

www.dell.com/SE2422H

www.dell.com/SE2422HX

Dell 24 Monitor

SE2422H/SE2422HX

No HDMI Cable

The display will go into Standby mode in 4 minutes.

www.dell.com/SE2422H

www.dell.com/SE2422HX

Dell 24 Monitor

SE2422H/SE2422HX

No VGA Cable

NOTE: This box also appears during normal system operation if the video cable is

disconnected or damaged.

4. Turn o your monitor and reconnect the video cable; then turn on both your

computer and the monitor.

If your monitor screen remains blank after performing the previous step, check your

video controller and computer for any possible issues.

5. Trouble Shooting Instructions

Built-in diagnostics

Your monitor has a built-in diagnostic tool that helps you determine if the screen

abnormality you are experiencing is an inherent problem with your monitor, or with your

computer and video card.

1 2 3 4 5

To run the built-in diagnostics:

1. Ensure that the screen is clean (no dust particles on the surface of the

screen).

2. Press and hold button 4 for four seconds and a menu appears on the screen.

3. Select the built-in diagnostics option. A gray screen appears.

4. Carefully inspect the screen for abnormalities.

5. Press Button 1 on the front panel again. The color of the screen changes to

red.

6. Inspect the display for any abnormalities.

7. Repeat steps 5 to 6 to inspect the display when it changes to green, blue,

black, white, and text screens.

The test is complete when the text screen appears. To exit, press button 1 again.

If you do not detect any screen abnormalities during the built-in diagnostic tool, the

monitor is functioning properly. Check the video card and computer for any possible

issues.

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