Dell UP2720QA Instructions for use

Simplified Service Manual–UP2720Q/ UP2720QA
Version: 02
Date:2022/10/05

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 .................................................................................................... 14
5. Trouble shooting instructions ................................................................................. 19

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.

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.

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.

2. Exploded view diagram with list of items
Item Description Q'TY Item Description Q'TY
1
ASSY CALIBRATOR 1
12
ASSY RC 1
2
MIDFRAME 1
13
ASSY HOOD 1
3
PCBA CTRL BD 1
14
PCBA USB BD 1
4
BTN PWR 1
15
ASSY CLMN 1
5
Panel 1
16
ASSY BASE 1
6
PCBA SPS BD 1
17
Power Cable 1
7
PCBA I/F BD 1
18
HDMI Cable 1
8
PCBA MCU BD 1
19
DP Cable 1
9
PCBA LED DRV BD 1
20
Thunderbolt™ 3 (USB Type-C) Active Cable 1
10
PCBA TBT BD 1
21
USB Type-C to Type-A Cable 1
11
ASSY SHD MAIN 1
1
2
3
4
6
5
15
16
14
11
87
10 12
9
13
17 2120
1918

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3. Wiring connectivity diagram
Wire 1
FFC 2 FFC 4
Wire 8
Wire 7
FFC 3
Wire 5
Wire 4
FFC 1
Wire 3 Wire 6
Wire 9
Wire 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
Item Picture Operation Tool Notes
1
To remove the stand:
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.
2
1. Unlock 2 screws on
the bottom side of
Rear Cover
2. Unlock 4 screws on
Rear Cover
Philips-head
screwdriver
Torsion of
Bottom side of
Rear Cover
screw
4.5±0.5kg
Torsion of
Rear Cover
screw: 9±1kg

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3
1. Disassemble Rear
Cover from middle
frame
Notice the disassembly
order:
1) Disassemble the top
side
2) Disassemble the
Left/Right side
3) Disassemble the
bottom side
4) Unplug USB BD wire
from TBT BD to take
off Rear Cover
Scraper Bar

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4
1. Remove all foil and
tapes from Main
SHD
2. Unplug backlight
wires from LED
Driver BD
3. Unplug “Power BD
to TBT BD Wire”
from Power BD and
TBT BD
4. Unplug “Calibrator
to MCU BD Wire”
from MCU BD
5
1. Remove black tapes
and unplug the
wires of
CALIBRATOR
Module from I/F BD
2. Unplug Control BD
Wire from I/F BD

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6
1. Unlock 5 screws to
disassemble Main
SHD from panel
2. Remove the tape
from “FFC EDP
cable” on panel
3. Unplug “FFC EDP
cable” from panel
Philips-head
screwdriver
Torsion of
screw:
4.5±0.5
7
1. Take off SPS BD
Mylar from SPS BD
8
1. Unlock 12 PCBA
screws
Philips-head
screwdriver
Torsion of
PCBA screw:
8.5±0.5Kg

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9
1. Disassemble TBT
BD from Main SHD
2. Unplug wires from
TBT BD to take off
TBT BD
3. Disassemble LED
Driver BD from Main
SHD
4. Unplug wire from
LED Driver BD to
take off LED Driver
BD
5. Disassemble MCU
BD from Main SHD
6. Unplug wires from
MCU BD to take off
MCU BD
10
1. Disassemble I/F BD
from Main SHD
2. Unplug SPS BD
wire from I/F BD to
take off I/F BD
3. Tear off tapes on I/F
BD and unplug all
wires from I/F BD

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11
1. Disassemble SPS
BD from Main SHD
and unplug AC wire
from SPS BD
2. Unplug SPS BD
wire from SPS BD

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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 SPS BD wire to SPS
BD
2. Insert AC wire to SPS BD and
assemble SPS BD to Main SHD
2
1. Insert “FFC EDP cable” to I/F BD
and paste 1 tape to fix it.
2. Insert “Wire EDP” to I/F BD and
paste 1 tape to fix it
3. Insert “I/F BD to TBT BD FFC
Cable”, “LED Driver BD Wire”
and “I/F BD to MCU BD wire” to
I/F BD

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4. Insert SPS BD wire to I/F BD and
assemble I/F BD to Main SHD
3
1. Insert “MCU BD to TBT BD Wire”
and “I/F BD to MCU BD wire to
MCU BD
2. Assemble MCU BD to Main SHD
3. Insert “LED Driver BD Wire” to
LED Driver BD
4. Assemble LED Driver BD on
Main SHD
5. Insert “Wire EDP”, “I/F BD to
TBT BD FFC Cable” and “MCU
BD to TBT BD Wire” to TBT BD
6. Assemble TBT BD on Main SHD
7. Lock 12 PCBA screws
Philips-
head
screwdriver
Torsion of
PCBA
screw:
8.5±0.5Kg

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4
1. Assemble SPS BD Mylar to SPS
BD
5
1. Place panel on flat worktable with
panel surface facing down
2. Insert “FFC EDP cable” to panel
and paste 1 tape to fix it
3. Lock 5 screws to fix Main SHD
on panel
Philips-
head
screwdriver
Torsion of
screw:
4.5±0.5kg
6
1. Insert Control BD Wire to I/F BD
2. Insert the wires of Calibrator
Module
3. Arrange the wires of
CALIBRATOR Module and
adhere a tape to fix the wires

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7
1. Insert “Backlight Wire” to LED
Driver BD
2. Insert “Power BD to TBT BD
Wire” to Power BD and TBT BD
3. Insert “Calibrator to MCU BD
Wire” to MCU BD and adhere
tapes and mylar to fix it (See
Orange mark)
4. Adhere foils to Main SHD (See
Purple mark)

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8
1. Insert USB BD wire to TBT BD
2. Assemble Rear Cover with
Middle Frame
3. Lock 4 screws on Rear Cover
4. Lock 2 screws on the bottom side
of Rear Cover
Philips-
head
screwdriver
Torsion of
Rear Cover
screw:
9±1kg
Torsion of
Bottom side
of Rear
Cover
screw
4.5±0.5kg
9
To attach the monitor stand:
1. Follow the instructions on the
flaps of carton to remove the
stand from the top cushion that
secures it
2. Insert the stand base blocks fully
into the stand slot
3. Lift the screw handle and turn the
screw clockwise
4. After tightening the screw, fold
the screw handle flat within the
recess
10
Attach the stand assembly to the
monitor.
a. Fit the two tabs on the upper part
of the stand to the groove on the
back of the monitor
b. Press the stand down till it snaps
into place

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5. Trouble shooting instructions

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