Dell AW3420DWB Instructions for use

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Simplified Service Manual–AW3420DWB
Version: 01
Date:2021/03/04

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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 ...................................................................................... 8
4. Disassembly and Assembly Procedures .................................................................. 9
4.1 Disassembly SOP ................................................................................................. 9
4.2 Assembly SOP .................................................................................................... 13
5. Trouble shooting instructions ................................................................................. 18

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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
1
1
0
16
14
13
9
8
5
17
15
12
1
1
7
6
4
3
2
18
23
22
21
20
1
9
25
24
26
27

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Item Description Q'ty
1 ASSY MF 1
2 BTN PWR 1
3 PCBA CTRL+LENS BD 1
4 MYLAR PWR CTRL-BD 1
5
PCBA SENSOR BD
1
6 Panel 1
7 MYLAR 213*111*T0.43 1
8 MYLAR 130*132 BL BD 1
9
PCBA SPS BD
1
10 PCBA I/F BD 1
11 PCBA SPS+LED BD 1
12 ASSY MAIN SHD 1
13 PCBA DOCKING BD 1
14
PCBA LED DRV BD
1
15 PCBA JACK BD 1
16 PCBA USB BD 1
17
PCBA CTRL+KEY BD
1
18
PCBA CTRL BD
1
19 PCBA LED BD 1
20 ASSY RC 1
21 ASSY CABLE COVER 1
22 ASSY STAND CLMN 1
23
ASSY STAND BASE
1
24 Power cable 1
25 DisplayPort cable 1
26
Mini
-
DisplayPort to DisplayPort cable
1
27
USB 3.0 upstream cable
1

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3. Wiring connectivity diagram
Wire 7
FFC 5
Wire 4
Wire 3
Wire 1
Wire 2
FFC 2
FFC 3
FFC 1
FFC 4
Wire 8 Wire 9
Wire 6
Wire 11
Wire 10
Wire 5

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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
I
tem
P
icture
Operation
Tool
Notes
1
1. Place monitor head
on U3417W curve
sponge jig
2. Carefully slide and
remove the Cable
Cover from the
monitor.
3. isconnect the
cables from the
monitor and slide
them out through
the cable-
management slot on
the stand riser.
4. Press and hold the
stand release button
5. Lift the stand up and
away from the
monitor.
U3417W
Curve Sponge
Jig
Panel and
whole
monitor head
must be
placed on
U3417W
curve sponge
jig to avoid
panel
damage.
It is not
allowed to
place the
front side of
panel and
monitor head
on a flat
surface

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2
1. Unlock 4 screws on
rear cover
2. Use hands or
scraper bar to
disassemble Rear
Cover from the
monitor.
Notice the
disassembly
order:
Bottom Side=>
Right Side=>Top
Side=>Left
Side=>Remove
Rear Cover from
panel
3. Remove USB FFC
cables from USB
BD
4. Remove 1 tape on
LED Driver BD wire
from main shielding
5. Remove LED Driver
BD wire from I/F BD
6. Remove CTRL FFC
cable from I/F BD
and main shielding
Philips-head
screwdriver
(Screw
Torque:
10.5±1Kgf)
Scraper bar

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3
1. Remove 1 tape from
Backlight Wire
2. Remove 2 backlight
wires from Power
BD
4
1. Remove 4 tapes
from Sensor BD
cable and USB FFC
cable
2. Remove USB FFC
cable from I/F BD
3. Remove Sensor BD
FFC cable from I/F
BD
4. Remove Power Ctrl
cable from IF BD
5
1. Unlock 4 screws to
disassemble Main
Shielding from
panel
2. Remove 1 yellow
tape from Wire EDP
and disassemble
Wire EDP from
panel
3. Take off mylar from
Power BD
Philips-head
screwdriver
(Screw
Torque:
7±1Kgf)

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6
1. Remove 1 conduct
tape from main
shielding
2. Unlock 1 screw to
disassemble
Docking BD from
main shielding
3. Disassemble wire
from Docking BD
Philips-head
screwdriver
(Screw
Torque:
10±0.5kgf)
7
1. Remove 1 yellow
tape from Wire EDP
2. Disassemble Wire
EDP from I/F BD
3. Unlock 11 screws
and 1 grounding
screw
4. Disassemble
SPS+LED BD, I/F
BD, SPS BD from
main shielding
5. Remove all wires
from SPS+LED BD,
I/F BD, SPS BD
Philips-head
screwdriver
(Screw
Torque:
10±0.5kgf)
Do not
touch the
component
without
wearing
insulating
gloves
when
disassembli
ng and
assembling
Power BD
8
1. Remove tape from
G-Sync wire
2. Unlock 2 screws to
disassemble G-
Sync module from
I/F BD
3. Take off wire from
G-Sync module
Philips-head
screwdriver
(Screw
Torque:
10±0.5kgf)

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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
Item
Picture
Operation
Tools
Notes
1
1. Assemble wire to G-Sync
module
2. Assembly G-Sync module
on I/F board and fix it by
screw*2
3. Fix G-Sync wire by tape
Philips-
head
screwdr
iver
(Screw
Torque:
10±0.5k
gf)
2
1. Insert cables to connect
SPS BD, I/F BD and
SPS+LED BD
Do not touch
the component
without
wearing
insulating
gloves when
disassembling
and
assembling
Power BD
3
1. Connect I/F BD to Docking
BD wire and I/F BD to USB
BD FFC cables with I/F BD

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4
1. Assemble I/F BD, SPS BD
and SPS+LED BD to main
shielding
2. Lock PCBA with 11 screws
3. Assemble Wire EDP to I/F
BD and fix it by tape
4. Paste 1 yellow tape on the
connector of Wire EDP to fix
it on I/F BD
5. Assemble mylar on SPS BD
6. Connect wire to Docking BD
7. Assemble Docking BD to
the back of main shielding
and fix it by 1 screw
8. Paste 1 conduct tape to the
upper-right corner of main
shielding
Philips-
head
screwdr
iver
(Screw
Torque:
10±0.5k
gf)

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5
1. Insert Wire E P to panel
and paste 1 yellow tape to
fix Wire E P
2. Assemble Main Shielding to
panel
3. Lock 4 screws to fix Main
Shielding on panel
Philips-
head
screwdr
iver
(Screw
Torque:
7±1kgf)
Please align
the connector
of Wire EDP to
paste yellow
tape.
Make sure all
pins of Wire
EDP are
covered by
yellow tape.
6
1. Paste “I/F B to
CTRL+LENS B FFC cable”
to panel and insert it to I/F
B
2. Paste Sensor B FFC cable
to panel
3. Insert USB FFC cable to I/F
B and paste it on main
shielding
4. Paste 4 tapes to fix Sensor
B FFC cable and USB
FFC cable

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7
1. Insert 2 Backlight wires to
Power B
2. Paste 3 tapes to middle
frame
3. Paste 1 tape to fix
Backlight wire
4. Insert CTRL FFC cable to
I/F B and paste it to
main shielding
5. Insert LE river B wire
to I/F B
6. Paste 1 tape to fix LE
river B wire on main
shielding
7. Insert USB FFC cable to
USB B
8. Paste USB cable to main
shielding
8
1. Assemble Rear Cover
with middle frame and fix
it by 4 screws
Philips-
head
screwdr
iver
(Screw
Torque:
10.5±1
Kgf)

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9
1. Assemble Cable Cover
with Rear Cover
10
1. Align and place the stand
riser on the stand base
2. Open the screw handle at
the bottom of the stand
base and turn it clockwise
to secure the stand
assembly
3. Close the screw handle
11
1. Slide the tabs on the
stand riser into the slots
on the display back cover
and lower the stand
assembly to snap it into
place

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5. Trouble shooting instructions

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