Dell P2422HEc User manual

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Service Manual–P2422HEb/ P2422HEc
Version: 01
Date:2022/03/11

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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. Check Label behind monitor ................................................................................. 6
3. Exploded view diagram with list of items (P2422HEb) ....................................... 7
4. Wiring connectivity diagram (P2422HEb) ............................................................ 9
5. Disassembly and Assembly Procedures (P2422HEb)....................................... 10
5.1 Disassembly SOP (P2422HEb)........................................................................... 10
5.2 Assembly SOP (P2422HEb) ............................................................................... 13
6. Exploded view diagram with list of items (P2422HEc)...................................... 16
7. Wiring connectivity diagram (P2422HEc)........................................................... 18
8. Disassembly and Assembly Procedures (P2422HEc)....................................... 19
8.1 Disassembly Procedures (P2422HEc) ................................................................ 19
8.2 Assembly Procedures (P2422HEc)..................................................................... 22
9. How to connect and disconnect power cable/ connectivity cable................... 24
10. Trouble shooting instructions............................................................................. 26

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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. Check Label behind monitor
2.1 P2422HEb (Please follow Instruction for P2422HEb)
2.2 P2422HEc (Please follow instruction for P2422HEc, start from section 6)
P2422HEb
P2422HEc

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3. Exploded view diagram with list of items (P2422HEb)
Item
Description
Q'ty
R
emark
1 ASSY CHIN 1
For EMEA Only, not for
other regions
2
ASSY MF
1
3 Panel 1
4
PCBA USB BD
1
5 MYLAR PWR BD 1
6
PCBA LEDDRV BD
1
7 PCBA SPS BD 1
8 PCBA I/F BD 1
9 ASSY SHD 1
10 MYLAR USB SIDE 1
11 PCBA CTRL BD 1
12 ASSY RC 1
13
ASSY STAND CLMN
1
14 ASSY STAND BASE 1
1
5
Power cable
1
S
ee “NOTE"
16 DisplayPort to DisplayPort cable 1 See “NOTE"
1
7
USB Type
-
C cable
1
S
ee “NOTE"
17
16
15
1
2
4
5
6
3
8
7
9
10
11
12
13
14

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NOTE:
For replacement of power cord, connectivity cable and external power supply (if applicable), contact Dell:
1. Go to https://www.dell.com/support.
2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right
corner of the page.
3. Click Contact Us next to the country dropdown.
4. Select the appropriate service or support link based on your need.
5. Choose the method of contacting Dell that is convenient for you

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4. Wiring connectivity diagram (P2422HEb)
Wire1
FFC 1
FFC 2
Wire3
Wire2

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5. Disassembly and Assembly Procedures (P2422HEb)
NOTE:
This “Disassembly and Assembly Procedures” is for EMEA only, not for other regions. Please note
that Dell will deem warranty void if any disassembly is done on the monitors.
5.1 Disassembly SOP (P2422HEb)
Preparation before disassembly
1. Clean the room for work
2. Identify the area for material
3. Prepare the implement, equipment, materials as bellow：
1) Working table
2) Philips-head screwdriver
3) Gloves
4) Cleaning cloth
5) ESD protection
I
tem
P
icture
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 4 RC screws
2. Disassemble Rear
Cover from Middle
Frame according to the
sequence shown in the
picture
Philips-head
screwdriver
Torsion of RC
screw: 9±1Kgf
1
3
2
2

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3
1. Pull out CTRL FFC from
I/F BD to take off Rear
Cover
4
1. Tear off malar from
Main SHD
2. Pull out USB FFC from
I/F BD
Philips-head
screw driver
Torsion of
screw:
4.5±0.5kgf
5
1. Pull out Backlight Wire
from LED Driver BD
2. Disassemble Main SHD
from Middle Frame
3. Tear off a conductive
tape and a yellow tape
from LVDS cable
4. Pull out LVDS cable and
take off Main SHD from
panel

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6
1. Disassemble Mylar from
Main SHD
2. Unlock 8 PCB screws
Philips-head
screwdriver
Torsion of
PCB screw:
8.5±1kgf
7
1. Disassemble I/F BD,
SPS BD, LED Driver BD
from Main SHD
2. Pull out all cables from
I/F BD, SPS BD and
LED Driver BD

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5.2 Assembly SOP (P2422HEb)
Preparation before assembly
1. Clean the room for work
2. Identify the area for material
3. Prepare the implement, equipment, materials as bellow：
1) Working table
2) Philips-head screwdriver
3) Gloves
4) Cleaning cloth
5) ESD protection
Item
Picture
Operation
Tools
Notes
1
1. Insert SPS BD to LED Driver
BD wire into SPS BD
2. Insert SPS BD to I/F BD wire
into SPS BD
3. Assemble SPS BD in Main
SHD
4. Insert the LVDS cable into I/F
BD
5. Insert SPS BD to I/F BD wire
into I/F BD and assemble I/F
BD in Main SHD
6. Insert SPS BD to LED Driver
BD wire to LED Driver BD and
assemble LED Driver BD in
Main SHD
7. Lock 8 PCB screws
Philips-head
screwdriver
Torsion of
PCB screw:
8.5±1kgf
2
1. Assemble Mylar （Paste Mylar
on Main SHD like the picture
showed）

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3
1. Insert LVDS cable into Panel
2. Paste 1 yellow tape and a
conductive tape to fix FFC
3. Assemble Main SHD to Middle
Frame
4. Insert Backlight Wire into LED
Driver BD and paste 1 tape to
fix wire
4
1. Insert USB FFC to USB BD and
I/F BD
2. Assemble mylar to Main SHD

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5
1. Insert CTRL FFC into I/F BD
2. Assemble Rear Cover with
Middle Frame according to the
sequence shown in the picture
3. Lock 4 RC screws
Philips-head
screwdriver
Torsion of
RC screw:
9±1Kgf
6
1. Assemble Stand
a. Insert the stand base blocks
fully into the stand slot.
b. Lift the screw handle and turn
the screw clockwise.
c. After fully tightening the screw,
fold the screw handle flat
within the recess.
7
1. Attach the stand assembly to
the display.
a. Fit the two tabs on the upper
part of the stand to the groove
on the back of the display.
b. Press the stand down till it
snaps into place.
4
1
1
2
3
3

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6. Exploded view diagram with list of items (P2422HEc)
○
33
○
34
○
35

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NOTE:
For replacement of power cord, connectivity cable and external power supply (if applicable), contact Dell:
1. Go to https://www.dell.com/support.
2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right
corner of the page.
3. Click Contact Us next to the country dropdown.
4. Select the appropriate service or support link based on your need.
5. Choose the method of contacting Dell that is convenient for you
No. Description Q’ty Remark
1
TRIM
1
For EMEA Only, not for
other regions
2 DECO PLATE tape 1
3 DECO PLATE 1
4 DECO PLATE sponge 1
5 MIDDLE FRAME 1
6 SIDE USB BOARD 1
7 Screw Q3 3
8
LENS
1
9 LED BOARD 1
1
0
Screw Q2
4
11 BKT SPEAKER 2
12
PANEL
1
13 Screw Q3(M3*3L) 15
1
4
Screw Q3(M3*6L)
1
0
15 Screw M4 1
16 PWD MYLAR 1
17 CONVERTER BOARD 1
18 MAINBOARD 1
19 PWD MYLAR TOP 1
20 MAINFRAME 1
21
SLIDER
1
22 BUTTON 1
2
3
S
PRINGS
2
24 KEY BOARD 1
2
5
D
P CAP
1
26 BUTTON 1
27
KEY
1
28 REAR COVER 1
29 DELL LOGO 1
30 Screw (M4*10L) 4
31 Hinge ass’y 1
32 Base ass’y 1
33 Power Cable 1 See “NOTE"
34 DP cable 1 See “NOTE"
35 USB TYPE-C CABLE 1 See “NOTE"

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7. Wiring connectivity diagram (P2422HEc)

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8. Disassembly and Assembly Procedures (P2422HEc)
NOTE:
This “Disassembly and Assembly Procedures” is for EMEA only, not for other regions. Please note
that Dell will deem warranty void if any disassembly is done on the monitors.
Tools Required
List the type and size of the tools that would typically can be used to disassemble the product to a
point where components and materials requiring selective treatment can be removed.
Tool Description:
− Screwdriver (Phillip-head, Hexagonal head)
− Penknife
8.1 Disassembly Procedures (P2422HEc)
Step
Figure
T
oo
l
Remark
Remove
the
Base ass’y.
Push the button
and pull out the
stand.
Note:
Put the monitor on
a flat, soft and
clean surface.
.
Unscrew the 4
screws by the
Philips-head
Screwdriver.

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Remove
the Rear
cover
Take scraper insert
the bezel bottom
site
Disconnect
the cables
Remove the
connectors and
tapes
Remove
the
mainframe
Unscrew the 4
screws on the
mainframe and 1
screw on the usb
board.
remove the mylar
on the power
board