Dell E2222H User manual

Version: 01
Date: 2021/10/30
Service Manual - E2222H

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
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.
12
11
10
Item Description Q'ty Remark
1 1
For EMEA Only, not for
other regions
2 1
13
4 3
15
6 1
1
7
8 2
9
10
11
Rear Cover ASSY
12
Interface board
LCM ASSY
Power board
1
1
Main chassis
See “NOTE”
Base
See “NOTE”
Power cable
DisplayPort cable
Stand
Safety Mylar
1
See “NOTE”
VGA cable 1
VESA Cover

3. Wiring Connectivity Diagram

4. How to connect and disconnect power cable/ connectivity cable
WARNING: To change power cable/ connectivity cable, switch off power before unplugging the cable and replugging in required
cable.

5. Disassembly and Assembly Procedures
5.1 Disassembly Procedures:
Tool 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) #1
- Screwdriver(Phillip head) #2
- Penknife
- Soldering iron and absorber
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.
S2
S1S1
Use a Philips-head screwdriver to remove 6pcs
screws for unlocking mechanisms.
(No.1~4 screw size=M4x11; Torque=11 1kgfxcm;
No.5~6 screw size=M4x6; Torque=11 1kgfxcm)
±
±
23
41
5
6
Remove the monitor stand base:
1. Place the monitor on a soft cloth or cushion.
2. Remove VESA cover to access the release button.
3. Use a long and thin screwdriver to push the release
latch located in a hole just above the stand.
4. Once the latch is released, remove the base away
from the monitor.
S3
Turn over the LCD monitor to let the screen faced
up, place a cloth on the panel where you are working
on to protect the panel. Continually, wedge your
fingers between the front bezel and the panel in
order of arrow preference for unlocking
mechanisms. Turn over the LCD monitor to let the
screen faced down and then remove the rear cover.
3
1
22
S4
S5
S6
Use a Philips-head screwdriver to remove 2pcs
screws for unlocking the bracket with panel module.
Use a Hex-head screwdriver to remove 2pcs screws
for unlocking the VGA connector.
(No.1~2 screw size=M3x2.6, Torque=4 0.5kgfxcm;
No.3~4 screw size=M3x8, Torque=6±0.5kgfxcm)
±
Disconnect the function key cable away from the
connector of the board, then tear off 3pcs adhesive
tape for releasing the function key board.
Tear off 1pcs aluminum foil on the back of the panel
lamp cable for unlocking panel lamp cable, and then
disconnect the panel lamp cable away from the
connector of panel module.
2
34
1

5. Disassembly and Assembly Procedures
S10
S7
S9
S11
S13
S12
Tear off the mylar tape, then ut the front bezel into a
fixture, then u
p
se a Philips-head screwdriver to
remove 3pcs screws for unlocking the function key
board with the front bezel.
(No.1~3 screw size=M2x2.4, Torque=0.8±0.2kgfxcm
Release the panel module away from the hooks of
the front bezel, then l
.
ift up the panel module and
take away the front bezel with key board
L
.
ift up the bracket chassis and put it on a protective
cushion
S8
Use a Philips-head screwdriver to remove 4pcs
screws for unlocking the circuit board, release all the
cables from the hooks.
(No.1 screw size=M4x8, Torque=6±0.5kgfxcm;
No. 2~4 screw size=M3x7.5, Torque=6±0.5kgfxcm)
Remove the Mylar from the hooks of the bracket
chassis module.
Remove the interface board and power board from
the bracket chassis module carefully, and disconnect
all the cables.
Unplug the LVDS cable from the connector of the
panel module by pushing the earing-locks.
3
2
4
1

5. Disassembly and Assembly Procedures
Take a mylar to insert the hooks of the bracket to
cover the power board.
S4
Turn over a power board and put the power board
into the bracket chassis, locate the panel power
cable into the hook of the bracket chassis.
Place a bracket chassis base on a protective
cushion.
5.2 Assembly Procedures:
S2
S1
Take a interface board, connect a LVDS cable to the
connector of the interface board, then connect the
cable of the power board to the connector of the
interface board. Turn over the interface board and
locate it into the bracket. Use a Philips-head
screwdriver to tighten 4pcs screws for locking the
power board and interface board.
(No.1 screw size=M4x8, Torque=5±0.5kgfxcm;
No.2~4 screw size=M3x7.5, Torque=5±0.5kgfxcm)
S3
3
2
4
1
Take 1pcs panel module, then put the panel into the
front bezel and locate the panel into the hooks of the
front bezel for the two parts firmly attached.
S6
The following two steps (S6 and S7) is processed in
LCM assemble line. Take 1pcs function key board
and 1pcs front bezel from the carton, then put the
middle bezel into a fixture, and locate the function
keyboard into the hooks of the front bezel Use a
Philips-head screwdriver to tighten 3pcs screws for
locking the function key board with the front bezel,
then paste 1pcs black mylar tape to cover the
function key board.
.
(No.1~3 screw size=M2x2.4, Torque=0.8±0.2kgfxcm
S5

5. Disassembly and Assembly Procedures
Adjust the bracket chassis to the correct position,
then use a Philips-head screwdriver to tighten 2pcs
screws for locking the bracket with panel module.
Use a Hex-head screwdriver to lock 2pcs screws for
locking the VGA connector.
(No.1~2 screw size=M3x4, Torque=5 0.5kgfxcm;
No.3~4 screw size=M3x8, Torque=6±0.5kgfxcm)
±
Connect the function key cable to the connector of
board, then tear off the 3pcs double-faced tape on
the back of the back and fix the cable on the bracket
as the picture below shown.
Take out 1pcs panel assembled module with front
bezel and function key board from the carton, and
then examine the panel surface according to
inspection criteria. Turn over the panel, and then
place screen faced down for later assembling.
S7
Move the bracket close to the panel, then use a
proper tool to connect LVDS cable to the connector
of the panel.
S8
2
S11
1
Connect the panel lamp cable to the connector of
the panel module, then fix the panel lamp cable with
1pcs aluminum foil as the picture below shown.
34
S10
S9

5. Disassembly and Assembly Procedures
Use a Philips-head screwdriver to tighten 4pcs
screws for locking rear cover with the assembled
unit, to tighten 2pcs screws for locking the rear cover
with bracket chassis module.
(No.1~4 screw size=M4x11; Torque=10 12kgfxcm;
No.5~6 screw size=M4x6; Torque=10 12kgfxcm)
~
~
Take 1pcs rear cover, put down the rear cover
and push the rear cover on the positions marked
as the picture below shown for mechanisms
engagement.
S13
S12
L
front bezel with panel module , then provide power
supply and a video signal to the monitor, then turn
on the monitor for functionality check.
ift up the monitor to checking the gap between the
S15
Stick 2pcs labels on the specific positions as the
picture below shown. Take 1pcs stand riser and
1pcs stand base, assemble the stand base with
stand riser. Insert the stand-riser into monitor groove
until it snaps into its place.
S14
23
41
5
6

6. Trouble Shooting Instructions
Self-test
Your monitor provides a self-test feature that allows you to check if 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:
1. Turn off both your computer and the monitor.
2. Disconnect all video cables from the monitor. This way, the computer does not have to be
involved.
3. Turn on the monitor.
If the monitor is working correctly, it detects that there is no signal and one of the following
message appears. While in self-test mode, the power LED remains white.
E2222H
Dell 22 Monitor
No DP Cable
www.dell.com/E2222H
The display will go into Standby mode in 4 minutes.
E2222H
?
NOTE: This message also appears during normal operation, when the video
cable is disconnected or damaged.
4. Turn off your monitor and reconnect the video cable; then turn on your computer and the
monitor.
If your monitor remains dark after you reconnect the cables, check your video controller
and computer.

6. Trouble Shooting Instructions
Built-in diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if any screen abnormality
you experience is an inherent problem with your monitor, or with your computer and video card.
1234
Label Description
1Button 1
2Button 2
3Button 3
4Button 4
To run the built-in diagnostics:
1. Ensure that the screen is clean (no dust particles on the surface of the screen).
2. Press and hold Button 4for about 4 seconds and wait for a pop up menu.
3. Use Button 1 or 2to select the and press to confirm.
A gray test pattern appears at the beginning of the diagnostic program.
4. Carefully inspect the screen for abnormalities.
5. Press Button 1 to change the test patterns.
6. Repeat steps 4 and 5 to inspect the display in red, green, blue, black, white and text
screens.
7. When in White color test screen, check for white color uniformity and if there white color
appears greenish/reddish, etc.
8. Press Button 1 to end the diagnostic program.

6. Trouble Shooting Instructions
Common problems
The following table provides general information about common monitor problems
you might encounter and the possible solutions:
Common symptoms Possible solutions
No video/Power LED off • Ensure that the video cable connecting the monitor and the computer is
properly connected and secure.
• Verify that the power outlet is functioning properly using any other electrical
equipment.
• Ensure that the power button is pressed.
• Ensure that the correct input source is selected via the Input Source menu.
No video/Power LED on • Increase brightness and contrast controls using the OSD.
• Perform monitor self-test feature check.
• Check for bent or broken pins in the video cable connector.
• Run the built-in diagnostics.
• Ensure that the correct input source is selected via the Input Source menu.
Poor focus • Eliminate video extension cables.
• Reset the monitor to Factory Settings (Factory Reset).
• Change the video resolution to the correct aspect ratio.
Shaky/Jittery video • Reset the monitor to Factory Settings (Factory Reset).
• Check environmental factors.
• Relocate the monitor and test in another room.
Missing pixels • Cycle power On-off.
• Pixel that is permanently off is a natural defect that can occur in LCD
technology.
• For more information about Dell Monitor Quality and Pixel Policy, see Dell
Support site at:
https://www.dell.com/support/monitors.
Stuck-on pixels • Cycle power On-off.
• Pixel that is permanently off is a natural defect that can occur in LCD
technology.
• For more information about Dell Monitor Quality and Pixel Policy, see Dell
Support site at:
https://www.dell.com/support/monitors.
Brightness problems • Reset the monitor to Factory Settings (Factory Reset).
• Adjust brightness and contrast controls using OSD.
Geometric distortion • Reset the monitor to Factory Settings (Factory Reset).
• Adjust horizontal and vertical using OSD.
Horizontal/Vertical lines • Reset the monitor to Factory Settings (Factory Reset).
• Perform monitor self-test feature check and determine if these lines are also
in self-test mode.
• Check for bent or broken pins in the video cable connector.
• Run the built-in diagnostics.

6. Trouble Shooting Instructions
Common symptoms Possible solutions
Synchronization
problems
• Reset the monitor to Factory Settings (Factory Reset).
• Perform monitor self-test feature check to determine if the scrambled
screen appears in self-test mode.
• Check for bent or broken pins in the video cable connector.
• Restart the computer in safe mode.
Safety related issues • Do not perform any troubleshooting step.
• Contact Dell immediately.
Intermittent problems • Try different Preset Modes in Color settings OSD. Adjust R/G/B value in
Custom Color in Color settings OSD.
• Change the Input Color Format to RGB or YPbPr in the Color settings
OSD.
• Run the built-in diagnostics.
Missing color • Perform monitor self-test feature check.
• Ensure that the video cable connecting the monitor to the computer is
connected properly and is secure.
• Check for bent or broken pins in the video cable connector.
Wrong color • Try different Preset Modes in Color settings OSD. Adjust R/G/B value in
Custom Color in Color settings OSD.
• Change the Input Color Format to RGB or YCbCr/YPbPr in the Color
settings OSD.
• Run the built-in diagnostics.
Image retention from a static
image left on the monitor for
a long period of time
• Set the screen to turn off after a few minutes of screen idle time. These can
be adjusted in Windows Power Options or Mac Energy Saver setting.
• Alternatively, use a dynamically changing screensaver.
Video ghosting or
overshooting
• Change the Response Time in the Display OSD to Fast or Normal
depending on your application and usage.
Product-specific problems
Specific symptoms Possible solutions
Screen image is too small • Check the Aspect Ratio setting in the Display settings OSD.
• Reset the monitor to Factory Settings (Factory Reset).
Cannot adjust the monitor
with the buttons on the
bottom of the panel
• Turn off the monitor, unplug the power cord, plug it back, and then turn on
the monitor.
No input signal when user
controls are pressed
• Check the signal source. Ensure that the computer is not in standby or
sleep mode by moving the mouse or pressing any key on the keyboard.
• Check if the video cable is plugged in properly. Disconnect and reconnect
the video cable if necessary.
• Reset the computer or video player.
The picture does not fill the
entire screen
• Due to different video formats (aspect ratio) of DVDs, the monitor may
display in full screen.
• Run the built-in diagnostics.