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Dell P2421D Simplified Service Manual

Dell P2421D
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Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all DELL Company Equipment. The service
procedures recommended by DELL and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools
should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order
to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may
damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE.
DELL could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be
done or of the possible hazardous consequences of each way. Consequently, DELL has not undertaken any such broad
evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by DELL must first
satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service
method selected.
Hereafter throughout this manual, DELL Company will be referred to as DELL.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire, or
other hazards.
Under no circumstances should the original design be modified or altered without written permission from DELL. DELL
assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS
SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the
panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment persons body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)

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Dell P2421D Specifications

General IconGeneral
3DNo
Pixel pitch0.2058 x 0.2058 mm
Screen shapeFlat
Pixel density123 ppi
Response time8 ms
Backlight typeLED
Display diagonal23.8 \
Display technologyLCD
Native aspect ratio16:9
Vertical scan range49 - 75 Hz
Maximum refresh rate60 Hz
Response time (fast)5 ms
Horizontal scan range29 - 113 kHz
Supported video modes480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 1440p
Viewable size diagonal604.5 mm
Viewable size, vertical296.35 mm
sRGB coverage (typical)99 %
Display number of colors16.78 million colors
Viewable size, horizontal526.85 mm
Display brightness (typical)300 cd/m²
Supported graphics resolutions2560 x 1440
Pivot angle-90 - 90 °
Tilt angle range-5 - 21 °
Panel mounting interface100 x 100 mm
Doesn't containPVC
Sustainability certificatesRoHS, ENERGY STAR
USB hub version2.0 / 3.2 Gen 1 (3.1 Gen 1)
DisplayPort version1.2
VGA (D-Sub) ports quantity0
USB Type-A downstream ports quantity4
On/off switch-
Cables includedDisplayPort, USB
Input current1.6 A
AC input voltage120 - 230 V
AC input frequency50 - 60 Hz
Energy efficiency scaleA to G
Power consumption (max)55 W
Power consumption (standby)0.2 W
Power consumption (typical)16.9 W
Operating altitude0 - 5000 m
Non-operating altitude5000 - 12192 m
Storage temperature (T-T)-20 - 60 °C
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)10 - 90 %
Product colorBlack
Market positioningBusiness
Package depth617.98 mm
Package width165.1 mm
Package height393.95 mm
Package weight7290 g
Harmonized System (HS) code85285210
Weight and Dimensions IconWeight and Dimensions
Bezel width (top)5.4 mm
Bezel width (side)5.5 mm
Height (with stand)356.1 mm
Bezel width (bottom)20.3 mm
Depth (without stand)166 mm
Width (without stand)537.8 mm
Height (without stand)322.1 mm
Weight (without stand)3370 g

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