Dell P2418HT Instructions for use

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

Front Bezel

Front Plate

Panel

Power BD

IF BD

Main Chassis

Key BD

Mid Frame

Function Key

Rubber Foot

Rear Cover

Cable Cover

Stand

Cable Clip

Release Button

Spring

USB BD

Support Plate

USB Cover

Lock Holder

3. Wiring Connectivity Diagram

USB 2.0

Interface board

USB 2.0

USB 3.0

Display Port

Down

stream

port with

charging

Down

stream

port

Down

stream

port

Touch module

DSUBHDMI

HDMI video

input, HDCP

Analog video

input

Audio

jack

Audio

out Up

stream

port

Down

stream

port

Display port

input, HDCP

USB board

(23.8" 16:9 1920x1080)

LED driver output

Function key

board

WLED LCD IPS panel

with in-cell touch system

LM238WF5-SSA1

Power board

110/220V

input

4. Disassembly and Assembly Procedures

4.1 Disassembly Procedures:

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.

Use one hand to press the rear cover, then wedge

your fingers between the rear cover and the middle

bezel on the corners of the top left side to the right

side of the monitor to release the rear cover.

Use a Philips-head screwdriver to remove four

screws for unlocking mechanisms.

(No.1~4 screw size=M4x10,Torque=12±0.5kgfxcm)

Remove the rear cover. Tear off the aluminum foil,

and then disconnect the USB cable and

away from the connector of the interface

board. Use

Function

key cable

a Philips-head screwdriver to remove

one screw for unlocking the USB unit, remove the

USB unit from the hooks.

(No.1 screw size=M3x5, Torque=4±0.5kgfxcm)

se a Philips-head screwdriver to remove four

screws for unlocking the bracket chassis module

with the panel module

(No.1~4 Screw size= M3x4, Torque=5±0.5kgfxcm)

Disconnect the panel power cable to the connector of

the panel module. Then disconnect the other cables

as the below picture shown.

Necessary repair and test equipment:

1. Philips-head screwdriver

2. Hex-head screwdriver

4. Disassembly and Assembly Procedures

S11

S10

U Philips-head screwdriver to removese a two

screws for unlocking the AC-power outlet connector.

And Use a Hex-head screwdriver to remove two

screws for unlocking mechanisms of the VGA

connectors.

(No.1~2 screw size=M3x10, Torque=6±0.5kgfxcm)

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

Tear off the adhesive tapes to release the function

key cable. Remove the middle bezel and front bezel

then put them on a protector.

Use a Philips-head screwdriver to remove nine

screws for unlocking the middle bezel with the

assembled unit. Use a Philips-head screwdriver to

remove two screws for unlocking the front bezel. Put

the bracket chassis module on the protector.

(No.1~9 screw size=M3x4, Torque=5±0.5kgfxcm)

(No.10~11 screw size=M1.6x3.1, Torque=0.7±0.2kgfxcm)

11 10

Remove the interface and power boards from the

disconnect all of the cables.

bracket chassis module carefully, and then

Turn over the bracket chassis module. Remove the

Mylar from the hooks of the bracket, and then use a

Philips-head screwdriver to remove screws for

unlocking the interface board and power board.

six

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

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

4. Disassembly and Assembly Procedures

4.2 Assembly Procedures:

Turn over a power board and put the power board

into the bracket chassis, then use a Philips-head

screwdriver to tighten four screws for locking the

power board.

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

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

Place a bracket chassis base on a protective

cushion.

Take a mylar to insert the hooks of the bracket to

cover the power board. locate the two cables into the

hook of the bracket chassis.

Take a interface board, connect the cable of the

power board to the CN2201 of the interface board.

Turn over the interface board and locate it into the

bracket. Use a Philips-head screwdriver to tighten

two screws for locking the interface board.

(No.1~2 screw size=M3x7.5, Torque=6±0.5kgfxcm)

CN2201

Panel preparation: Examine the panel surface

according to inspection criteria. Turn over the panel

to place screen faced down. Take a front bezel and

put the front bezel under the panel as the below

picture shown.

Turn over the bracket chassis module and then

Philips-head screwdriver to tighten

use

a two screws for

locking the AC-power outlet connector. And Use a

Hex-head screwdriver to tighten two screws for

locking mechanisms of the VGA connectors.

(No.1~2 screw size=M3x10, Torque=6±0.5kgfxcm)

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

4. Disassembly and Assembly Procedures

Take a function key board and a middle bezel, then

thread the function key cable through the hole of the

middle bezel, and then locate the function board unit

to the specific position of the middle bezel. U

function key board middle bezel.

se a

Philips-head screwdriver to tighten three screws for

locking the with the

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

and push the middle bezel for two parts firmly

attachment. Tear off all the double-faced adhesive

tapes which pasted on the back of the function key

cable, and then fix the cable on the panel.

ut down the middle bezel on the assembled unit

Adjust the bracket chassis module, and then u

se a

Philips-head screwdriver to tighten four screws for

locking the bracket chassis with the panel module

(No.1~4 Screw size= M3x4, Torque=5±0.5kgfxcm)

Use a Philips-head screwdriver to tighten nine

screws for locking the middle bezel with the

assembled unit. Use a Philips-head screwdriver to

tighten two screws for locking the front bezel. Put the

bracket chassis module on the panel module.

(No.1~9 screw size=M3x4, Torque=5±0.5kgfxcm)

(No.10~11 screw size=M1.6x3.1, Torque=0.7±0.2kgfxcm)

Connect the panel power cable to the connector of

the panel module. Then connect the other cables as

the below picture shown.

S10

S11

11 10

Prepare a USB board, a USB hub and a connect

cable. Connect the cable to the USB board, then

locate the USB board into the hooks of the middle

bezel. Take the USB Hub to cover the USB board,

and then

use a Philips-head screwdriver to tighten

one screw for locking the USB board with the USB

hub with the middle bezel

(No.1 screw size=M3x5, Torque= kgfxcm)4±0.5

S12

4. Disassembly and Assembly Procedures

Connect the USB cable and the function key cable

to the connector of the interface board. Then stick a

piece of aluminum foil on the specific position as the

picture below shown.

Take a rear cover, p

assembled unit carefully and push the rear cover on

the positions marked for the rear cover mechanisms

engagement.

ut down the rear cover on the

S14

S13

Use a Philips-head screwdriver to tighten four

screws for locking the rear cover. Stick three pieces

of label on the specific positions

(No.1~4 screw size=M4x10, Torque=12±0.5kgfxcm)

S15

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.

S16

S18

Take a stand base close to the stand, and fix the

base to the stand as the below picture shown.

S17

5. Trouble Shooting Instructions

WARNING: Before you begin any of the procedures in this section, follow the

Safety 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:

1Turn o both your computer and the monitor.

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

operation, remove all digital and the analog cables from the back of computer.

3Turn on the monitor.

The floating dialog box should appear on-screen (against a black background), if the

monitor cannot sense a video signal and is working correctly. While in self-test mode,

the power LED remains white. Also, depending upon the selected input, one of the

dialogs shown below will continuously scroll through the screen.

4This box also appears during normal system operation, if the video cable becomes

disconnected or damaged.

5Turn o your monitor and reconnect the video cable; then turn on both your

computer and the monitor.

If your monitor screen remains blank after you use the previous procedure, check your

video controller and computer, because your monitor is functioning properly.

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