Dell St2420l Users Guide

 
Notes, Notices, and Cautions  
Information in this document is subject to change without notice.  
 
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Back to Contents Page    
    
 
 
   Package Contents  
   Product Features  
   Identifying Parts and Controls  
   Monitor Specifications  
   Plug and Play Capability  
   LCD Monitor Quality & Pixel Policy  
   Maintenance Guidelines  
Package Contents  
Your monitor ships with the components shown below. Ensure that you have received all the components and  contact Dell  if something is missing.  
NOTE:  Some items may be optional and may not ship with your Monitor. Some features or media may not...

   
Product Features  
The  ST2420L/ST2421L  flat panel display has an active matrix, Thin - Film Transistor (TFT), and Liquid Crystal Display (LCD). The monitor features include:  
■   ST2420L/ST2421L:  60.97cm (24 inches) viewable area display.   
■  1920 x 1080 resolution, plus full - screen support for lower resolutions.   
■  Tilt adjustment capability.   
■  Plug and play capability if supported by your system.   
■  On - Screen Display (OSD) adjustments for ease of set - up and screen...

 
Side View  
Bottom View  
  Label Description/Use  
1 Barcode serial number label To contact Dell for technical support.
2 Security lock slot To help secure your monitor.
3 Dell Soundbar mounting brackets To attach the optional Dell Soundbar.
4 Regulatory rating label Lists the regulatory approvals.
5 Stand release button To release stand assembly from monitor.
 
   Left Side  

   
Monitor Specifications  
Power Management Modes  
If you have VESA's DPMS™ compliance display card or software installed in your PC, the monitor can automatically reduce its power consumption when not in 
use. This is referred to as Power Save Mode. If input from a keyboard, mouse or other input devices is detected by the computer, the monitor will automatically 
wake up. The following table shows the power consumption and signaling of this automatic power - saving feature:   
ST2420L/ST2421L...

 
 1   Video - Red    
2   Video - Green  
3   Video - Blue  
4   GND  
5   Self - test  
6   GND - R  
7   GND - G  
8   GND - B  
9   Computer 5V/3.3V  
10   GND - sync  
11   GND  
12   DDC data  
13   H - sync  
14   V - sync  
15   DDC clock  
Pin 
Number 24 - pin Side of th e C o nnected  Signal 
Cable
1 TMDS RX2 -
2 TMDS RX2+
3 TMDS Ground
4 Floating
5 Floating
6 DDC Clock
7 DDC Data
8 Floating
9 TMDS RX1 -
10 TMDS RX1+
11 TMDS Ground
12 Floating
13 Floating
14 +5V power
15 Self test 
16 Hot Plug...

HDMI Connector  
   
Flat Panel Specifications  
* Based on estimation  
** ST2420L/ST2421L Color Gamut (Typical) is based on CIE1976 (81 %) and CIE1931 (68 %).  Pin Number   19 - pin Side of the Connected Signal Cable  
1 TMDS DATA 2+
2 TMDS DATA 2 SHIELD
3 TMDS DATA 2 -
4 TMDS DATA 1+ 
5 TMDS DATA 1 SHIELD
6 TMDS DATA 1 -
7 TMDS DATA 0+
8 TMDS DATA 0 SHIELD
9 TMDS DATA 0 -
10 TMDS CLOCK
11 TMDS CLOCK SHIELD
12 TMDS CLOCK -  
13 CEC
14 Reserved (N.C. on device) 
15 DDC CLOCK (SCL)
16 DDC DATA (SDA)
17...

Resolution  
   
Video Supported Modes  
   
Preset Display Modes  
ST2420L/ST2421L  
   
Electrical  
   
Physical Characteristics  Model ST2420L/ST2421L
Horizontal scan range 30 kHz to 83 kHz (automatic)
Vertical scan range 56 Hz to 76 Hz (automaticyf
Maximum preset resolution 1920 x 1080 at 60 Hz
Model ST2420L/ST2421L
Video display capabilities (HDMI playback) 480i/480p/576i/576p/720p/1080i/1080p     
Display Mode   Horizontal Frequency 
(kHz)   Vertical Frequency 
(Hz)   Pixel Clock 
(MHz)   Sync...

   
Environmental  
   
Plug and Play Capability  
You can install the monitor in any Plug and Play - compatible system. The monitor automatically provides the computer system with its Extended Display 
Identification Data (EDID) using Display Data Channel (DDC) protocols so that the system can configure itself and optimize the monitor settings. If required, 
the user can select different settings, but in most cases monitor installation is automatic.  
LCD Monitor Quality & Pixel Policy  
During the LCD...

Caring for Your Monitor  
Fo r best practices, follow the instructions in the list below while unpacking, cleaning, or handling your monitor:  
l To clean your antistatic screen, lightly dampen a soft, clean cloth with water. If possible, use a special screen - cleaning tissue or solution suitable for the 
antistatic coating. Do not use benzene, thinner, ammonia, abrasive cleaners, or compressed air.   
l Use a lightly - dampened, warm cloth to clean the monitor. Avoid using detergent of any kind as some...