U4919DWB 显示器用户手册说明书-USB迷|专注于互联网分享

2024年9月19日发(作者：历慕凝)

Simplified Service Manual–U4919DWB

Version: 01

Date:2021/02/04

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Content Index

1. General Safety Instructions ....................................................................................... 3

1.1 SAFETY: General Safety ...................................................................................... 3

1.2 SAFETY: General Power Safety ........................................................................... 5

2. Exploded view diagram with list of items ................................................................. 6

3. Wiring connectivity diagram ...................................................................................... 7

4. Disassembly and Assembly Procedures .................................................................. 8

4.1 Disassembly SOP ................................................................................................. 8

4.2 Assembly SOP .................................................................................................... 12

5. Trouble shooting instructions ................................................................................. 16

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1. General Safety Instructions

Use the following safety guidelines to help ensure your own personal safety and to help protect your

equipment and working environment from potential damage.

NOTE: In this section, equipment refers to monitors.

IMPORTANT NOTICE FOR USE IN HEALTHCARE ENVIRONMENTS:

Dell products are not medical devices and are not listed under UL or IEC 60601 (or equivalent). As a

result, they must not be used within 6 feet of a patient or in a manner that directly or indirectly

contacts a patient

1.1 SAFETY: General Safety

WARNING: To prevent the spread of fire, keep candles or other open flames away from this product

at all times.

When setting up the equipment for use:

 Place the equipment on a hard, level surface. Leave 10.2 cm (4 in) minimum of clearance on

all vented sides of the computer to permit the airflow required for proper ventilation.

 Restricting airflow can damage the computer or cause a fire.

 Do not stack equipment or place equipment so close together that it is subject to

recalculated or preheated air.

 NOTE: Review the weight limits referenced in your computer documentation before placing

a monitor or other devices on top of your computer.

 Ensure that nothing rests on your equipment's cables and that the cables are not located

where they can be stepped on or tripped over.

 Ensure that all cables are connected to the appropriate connectors. Some connectors have

a similar appearance and may be easily confused (for example, do not plug a telephone

cable into the network connector).

 Do not place your equipment in a closed-in wall unit or on a bed, sofa, or rug.

 Keep your device away from radiators and heat sources.

 Keep your equipment away from extremely hot or cold temperatures to ensure that it is used

within the specified operating range.

 Do not push any objects into the air vents or openings of your equipment. Doing so can

cause fire or electric shock by shorting out interior components.

 Avoid placing loose papers underneath your device. Do not place your device in a closed-in

wall unit, or on a soft, fabric surface such as a bed, sofa, carpet, or a rug.

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When operating your equipment:

 Do not use your equipment in a wet environment, for example, near a bath tub, sink, or

swimming pool or in a wet basement.

 Do not use AC powered equipment during an electrical storm. Battery powered devices may

be used if all cables have been disconnected.

 Do not spill food or liquids on your equipment.

 Before you clean your equipment, disconnect it from the electrical outlet. Clean your device

with a soft cloth dampened with water. Do not use liquids or aerosol cleaners, which may

contain flammable substances.

 Clean the monitor display with a soft, clean cloth and water. Apply the water to the cloth,

then stroke the cloth across the display in one direction, moving from the top of the display

to the bottom. Remove moisture from the display quickly and keep the display dry.

 Long-term exposure to moisture can damage the display. Do not use a commercial window

cleaner to clean your display.

 If your equipment does not operate normally - in particular, if there are any unusual sounds

or smells coming from it - unplug it immediately and contact an authorized dealer or service

center.

Protecting Against Electrostatic Discharge

Electrostatic discharge (ESD) events can harm electronic components inside your equipment. Under

certain conditions, ESD may build up on your body or an object, such as a peripheral, and then

discharge into another object, such as your computer. To prevent ESD damage, you should

discharge static electricity from your body before you interact with any of your equipment’s internal

electronic components, such as a memory module. You can protect against ESD by touching a metal

grounded object (such as an unpainted metal surface on your computer’s I/O panel) before you

interact with anything electronic. When connecting a peripheral (including handheld digital assistants)

to your equipment, you should always ground both yourself and the peripheral before connecting it. In

addition, as you work inside the equipment, periodically discharge any static charge your body may

have accumulated.

You can also take the following steps to prevent damage from electrostatic discharge:

 When unpacking a static-sensitive component from its shipping carton, do not remove the

component from the antistatic packing material until you are ready to install the component.

Just before un wrapping the antistatic package, be sure to discharge static electricity from

your body.

 When transporting a sensitive component, first place it in an antistatic container or

packaging.

 Handle all electrostatic sensitive components in a static-safe area. If possible, use antistatic

floor pads and work bench pads.

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1.2 SAFETY: General Power Safety

Observe the following guidelines when connecting your equipment to a power source:

 Check the voltage rating before you connect the equipment to an electrical outlet to ensure

that the required voltage and frequency match the available power source.

 Do not plug the equipment power cables into an electrical outlet if the power cable is

damaged

 Norway and Sweden: If this product is provided with a 3-prong power cable, connect the

power cable to a grounded electrical outlet only.

 If you use an extension power cable, ensure that the total ampere rating of the products

plugged in to the extension power cable does not exceed the ampere rating of the extension

cable.

 If you must use an extension cable or power strip, ensure the extension cable or power strip

is connected to a wall power outlet and not to another extension cable or power strip. The

extension cable or power strip must be designed for grounded plugs and plugged into a

grounded wall outlet.

 If you are using a multiple-outlet power strip, use caution when plugging the power cable into

the power strip. Some power strips may allow you to insert a plug incorrectly. Incorrect

insertion of the power plug could result in permanent damage to your equipment, as well as

risk of electric shock and/or fire. Ensure that the ground prong of the power plug is inserted

into the mating ground contact of the power strip.

 Be sure to grasp the plug, not the cable, when disconnecting equipment from an electric

socket.

If your equipment uses an AC adapter:

 Use only the Dell provided AC adapter approved for use with this device. Use of another AC

adapter may cause a fire or explosion.

 NOTE: Refer to your system rating label for information on the proper adapter model

approved for use with your device.

 Place the AC adapter in a ventilated area, such as a desk top or on the floor, when you use

it to run the computer or to charge the battery. Do not cover the AC adapter with papers or

other items that will reduce cooling; also, do not use the AC adapter inside a carrying case.

 The AC adapter may become hot during normal operation of your computer. Use care when

handling the adapter during or immediately after operation.

 It is recommended that you lay the adapter on the floor or desk so that the green light is

visible. This will alert you if the adapter should accidentally go off due to external effects. If

for any reason the green light goes off, disconnect the AC power cord from the wall for a

period of ten seconds, and then reconnect the power cord.

 Japan Only: Use only the Dell-provided AC power cable with the AC adapter. Use of any

other power cable may damage the device or AC adapter or may present risk of fire or

electric shock.

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2. Exploded view diagram with list of items

9 10

Item

Description

Panel

PCBA CTRL BD

BTN PWR

MID-FRAME

PCBA SPS BD

PCBA I/F BD

PCBA LED DRV BD

ASSY SHD MAIN

ASSY RC

PCBA USB BD

ASSY CLMN

ASSY BASE

ASSY CVR VESA

Screw x 4 for assembling stand to monitor head

Power Cable

HDMI Cable

DP Cable

USB 3.0 Upstream Cable

USB Type-C Cable

Q'ty

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3. Wiring connectivity diagram

Wire 3 Wire5

Wire 6

FFC 1

Wire 1

Wire 2

Wire 3

FFC 2

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4. Disassembly and Assembly Procedures

4.1 Disassembly SOP

Preparation before disassemble

1. Clean the room for disassemble

2. Identify the area for monitor

3. Check the position that the monitors be placed and the quantity of the monitor; prepare the area for

material flow; according to the actual condition plan the disassemble layout

4. Prepare the implement, equipment, material as bellow:

1) Working table

2) Philips-head screwdriver

3) Glove

4) Cleaning cloth

5) ESD protection

6) U4919DW Curve Sponge Jig

7) Bar scraper

Picture Operation Tool Notes Item

To remove the stand: 1. U4919DW Panel and

whole monitor Curve

1. Place monitor on Sponge Jig head must be

U4919DW curve placed on

sponge jig U4919DW

curve sponge

2. Press and lift the jig to avoid

cover latch to release

panel

and remove the cover

2. Phillips

damage.

crosshead

screwdriver

It is not

allowed to 3. Use a Phillips

(Screw

crosshead place the

Torque:

screwdriver to front side of

8~10kgf)

remove the four panel and

screws securing the monitor head

stand on a flat

surface

4. Lift the stand up and

away from the

monitor

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1. Unlock 4 screws on

Rear Cover

2. Disassemble Rear

Cover from Middle

Frame

(Sequence: 2 corner

of top side the

middle of top side

left & right sides

the 2 corner of

bottom side the

middle of bottom

side)

Philips-head

screwdriver

(Screw

Torque:

11±1kgf)

1. Remove USB SIDE

BD FFC cable from

I/F BD to take off

Rear Cover

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1. Tear off Al tape

from Main Shielding

(See blue mark)

2. Pull out Control BD

cable from I/F BD

Philips-head

screwdriver

Torsion of

BKT screw:

4.5±0.5KG

1. Pull out lamp wire

from PCBA

1. Unlock 7 screws on

Main Shielding

2. Disassemble EDP

cable from panel to

take off Main

Shielding

Philips-head

screwdriver

Torsion of

Main

Shielding

screw:

4.5±0.5KG

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1. Take off safety

Mylar from Power

2. Unlock 10 PCBA

screws & 1 ground

screw

3. Disassemble PCBA

from Main Shielding

and pull off all wires

from PCBA

Philips-head

screwdriver

Torsion of

PCB &ground

screw:

8.5~9.5kgf

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4.2 Assembly SOP

Preparation before assemble

1. Clean the room for work

2. Identify the area for material

3. Prepare the implement, equipment, material as bellow:

1) Working table

2) Philips-head screwdriver

3) Glove

4) Cleaning cloth

5) ESD protection

6) U4919DW Curve Sponge Jig

Item Picture Operation

1. Assemble AC wire and

Power BD to main

shielding

2. Plug EDP wire into

I/FBD Paste yellow

tape and adhesive

tape

3. Plug Driver Board wire

and Power BD wire

into I/F BD and

assemble I/FBD into

Main Shielding

I/F BD

4. Plug Driver BD wire

into I/F BD and

assemble I/FBD into

Main Shielding.

Paste 1 adhesive tape

to fix EDP wire

LED DRV

I/F BD

Tools

Notes

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1. Lock 10 PCBA screws

and 1 ground screw

2. Assemble safety Mylar

on Power BD

Philips-head

screwdriver

Torsion of

PCB &

Ground

Screw:

8.5~9.5kg.f

1. Plug EDP wire into

panel and paste 1

yellow tape and 1

adhesive tape.

1. Locate Main Shielding

on panel and lock 7

screws

2. Paste Al tape on Main

Shielding (See blue

mark)

Philips-head

screwdriver

Torsion of

Main

Shielding

screw:

4.5±0.5KG

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1. Insert USB-side-BD

FFC cable to I/F BD

and assemble Rear

Cover with Middle

Frame

2. Press the Rear Cover

(Sequence: the middle

of bottom sidethe 2

corner of bottom

sideleft & right

sidesthe middle of

top side2 corner of

top side)

3. Lock 4 screws on Rear

Cover

Philips-head

screwdriver

Torsion of

RC screw:

11±1Kg

To attach the monitor

stand:

1. Insert the stand base

blocks fully into the

stand slot

2. Lift the screw handle

and turn the screw

clockwise

3. After fully tightening

the screw, fold the

screw handle flat

within the recess

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Attach the stand assembly

to the monitor

1. Fit the two tabs on the

upper part of the stand

to the groove on the

back of the monitor

2. Use a Phillips

crosshead screwdriver

to attach the four

screws to secure the

stand assembly to the

monitor

Attach the VESA cover to

the monitor

1. Insert the cover with

the lower part

downward. Do NOT

attach the latch at

this point

2. Tilt to fit the three tabs

on the upper part of

the cover to the groove

of the back of the

monitor

3. Press the cover down

till the latch snaps into

place

NOTE: When

attaching the

stand

assembly, tilt

the stand

base

upwards and

make sure

that the stand

base does

not hit the

surface

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5. Trouble shooting instructions

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