Dell™ ST2420L/ST2421L monitor User's Guide
About Your Monitor
Setting Up the Monitor
Operating the Monitor
Solving Problems
Appendix
Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.
Information in this document is subject to change without notice.
© 2010 Dell™ Inc. All rights reserved.
Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell and the DELL logo are trademarks of Dell Inc. Microsoft and Windows are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries; ENERGY STAR is a registered trademark of the U.S. Environmental Protection Agency. As an ENERGY STAR partner, Dell Inc. has determined that this product meets the ENERGY STAR guidelines for energy efficiency.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.
ST2420Lb/ST2421Lb
August 2010 Rev. A00
Back to Contents Page
About Your Monitor
Dell™ ST2420L/ST2421L monitor User's Guide
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 be available in certain countries.
• Monitor with Stand
• Power Cable
• DVI Cable (optional)
• VGA Cable
•Safety Information
•Drivers and Documentation media
•Quick Setup Guide
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 optimization.
■Software and documentation CD which includes an information file (INF), Image Color Matching File (ICM), and product documentation.
■Energy Saver feature for Energy Star compliance.
■Security lock slot.
Identifying Parts and Features
Front View
Front View |
Front Panel Controls |
Label Description
1-2 Shortcut keys
*The default settings are Preset Modes and Brightness/Contrast.
1Shortcut key: Preset Modes (Default)
2Shortcut key: Brightness/Contrast (Default) 3 OSD menu select
4EXIT
5Power On/Off (light indicator below Dell logo)
Back View
Back 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. |
|
|
|
|
|
|
Side View
Left Side
Bottom View
Bottom view
Label Description
AC power cord connector
1
DVI connector
2
HDMI connector
3
VGA connector
4
Audio Line-in
5
Audio Line out
6
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
VESA Modes |
Horizontal |
Vertical Sync |
Video |
Power |
Power Consumption |
|
Sync |
|
|
Indicator |
|
|
|
|
|
|
|
|
|
|
|
|
|
Normal operation |
Active |
Active |
Active |
White |
30 W (maximum) |
|
|
|
|
|
20 W (typical) |
|
|
|
|
|
|
|
|
|
|
|
|
Active-off mode |
Inactive |
Inactive |
Blanked |
Amber |
Less than 1 W |
|
|
|
|
|
|
Switch off |
- |
- |
- |
Off |
Less than 0.5 W |
|
|
|
|
|
|
|
|
|
|
|
|
NOTE: This monitor is ENERGY STAR®-compliant.
NOTE: Zero power consumption in OFF mode can only be achieved by disconnecting the main cable from the monitor.
Pin Assignments
VGA Connector
Pin |
15-pin Side of the |
Number |
Connected Signal Cable |
|
|
1Video-Red
2Video-Green
3Video-Blue
4GND
5Self-test
6GND-R
7GND-G
8GND-B
9Computer 5V/3.3V
10GND-sync
11GND
12DDC data
13H-sync
14V-sync
15DDC clock
DVI Connector
Pin |
24-pin Side of the Connected Signal |
Number |
Cable |
|
|
1TMDS RX2-
2TMDS RX2+
3TMDS Ground
4Floating
5Floating
6DDC Clock
7DDC Data
8Floating
9TMDS RX1-
10TMDS RX1+
11TMDS Ground
12Floating
13Floating
14+5V power
15Self test
16Hot Plug Detect
17TMDS RX0-
18TMDS RX0+
19TMDS Ground
20Floating
21Floating
22TMDS Ground
23TMDS Clock+
24TMDS Clock-
HDMI Connector
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 |
DDC/CEC Ground |
|
|
18 |
+5V POWER |
|
|
19 |
HOT PLUG DETECT |
|
|
Flat Panel Specifications
Model |
ST2420L/ST2421L |
|
|
Screen type |
Active matrix - TFT LCD |
|
|
Panel type |
TN |
|
|
Screen dimensions |
60.97cm (24 inches) (24-inch viewable image size) |
|
|
Preset display area: |
|
Horizontal |
531.36 mm (20.92 inches) |
Vertical |
298.89 mm (11.77 inches) |
|
|
Pixel pitch |
0.277 mm |
|
|
Viewing angle |
160° (vertical) typical, 170° (horizontal) typical |
|
|
Luminance output |
250 CD/m² (typical) |
|
|
Contrast Ratio |
1,000:1 (typical) |
|
|
|
ST2420L: 8,000,000 to 1* |
Dynamic Contrast Ratio |
|
|
ST2421L: 7,000,000 to 1* |
|
|
Faceplate coating |
Antiglare with hard-coating 3H |
|
|
Backlight |
LED light bar system |
|
|
Response Time |
5 ms typical |
|
|
Color Depth |
16.7 mil colors |
|
|
Color Gamut |
81 %** |
|
|
* Based on estimation |
|
** ST2420L/ST2421L Color Gamut (Typical) is based on CIE1976 (81 %) and CIE1931 (68 %).
Resolution
Model |
ST2420L/ST2421L |
|
|
|
|
Horizontal scan range |
30 kHz to 83 kHz (automatic) |
|
|
|
|
Vertical scan range |
56 Hz to 76 Hz (automatic) |
|
|
|
|
Maximum preset resolution |
1920 x 1080 at 60 Hz |
|
|
|
|
|
|
|
Video Supported Modes
Model |
ST2420L/ST2421L |
|
|
|
|
Video display capabilities (HDMI playback) |
480i/480p/576i/576p/720p/1080i/1080p |
|
|
|
|
|
|
|
Preset Display Modes
ST2420L/ST2421L
Display Mode |
Horizontal Frequency |
Vertical Frequency |
Pixel Clock |
Sync Polarity (Horizontal/Vertical) |
|
|
(kHz) |
(Hz) |
(MHz) |
|
|
VGA, 720 x 400 |
31.469 |
70.087 |
28.3 |
-/+ |
|
VGA, 640 x 480 |
31.469 |
59.940 |
25.2 |
-/- |
|
VGA, 640 x 480 |
37.500 |
75.000 |
31.5 |
-/- |
|
VESA, 800 x 600 |
37.879 |
60.317 |
40.0 |
+/+ |
|
VESA, 800 x 600 |
46.875 |
75.000 |
49.5 |
+/+ |
|
VESA, 1024 x 768 |
48.363 |
60.004 |
65.0 |
-/- |
|
VESA, 1024 x 768 |
60.023 |
75.029 |
78.8 |
+/+ |
|
VESA. 1152 x 864 |
67.500 |
75.000 |
108.0 |
+/+ |
|
VESA, 1280 x 1024 |
64.000 |
60.000 |
108.0 |
+/+ |
|
VESA, 1280 x 1024 |
79.976 |
75.025 |
135.0 |
+/+ |
|
VESA, 1920 x 1080 |
67.500 |
60.000 |
148.5 |
+/+ |
|
|
|
|
|
|
|
|
|
|
|
|
|
Electrical
Model |
ST2420L/ST2421L |
|
|
Analog RGB, 0.7 Volts +/- 5%, positive polarity at 75 ohm input impedance
Video input signals
Digital DVI-D TMDS, 600mV for each differential line, positive polarity at 50 ohm input impedance
HDMI, 600mV for each differential line, 100 ohm input impedance per differential pair
Synchronization input signals
Separate horizontal and vertical synchronizations, polarity-free TTL level, SOG (Composite SYNC on green)
AC input voltage/frequency/current 100 to 240 VAC/50 or 60 Hz + 3 Hz/2.0A (Max.)
Inrush iso surge current
120 V: 30 A (Max.)
240 V: 60 A (Max.)
Physical Characteristics
Model |
ST2420L/ST2421L |
||
|
|
|
|
|
• |
D-sub: Blue connector |
|
Connector type |
• |
DVI-D: White connector |
|
• |
HDMI |
||
|
|||
|
|
|
|
|
• |
D-sub: Detachable, Analog, 15 pin, shipped attached to the monitor |
|
Signal cable type |
• |
DVI-D |
|
• |
HDMI |
||
|
|||
|
|
|
|
|
|
|
Dimensions (with stand) |
|
|
|
|
|
Height |
418.24 mm (16.47 inches) |
|
|
|
|
Width |
574.96 mm (22.64 inches) |
|
|
|
|
Depth |
203.68 mm (8.02 inches) |
|
|
|
|
|
|
|
Dimensions (without stand) |
|
|
|
|
|
Height |
356.43 mm (14.03 inches) |
|
|
|
|
Width |
574.96 mm (22.64 inches) |
|
|
|
|
Depth |
59.72 mm (2.35 inches) |
|
|
|
|
Stand dimensions |
|
|
|
|
|
Height |
149.85 mm ( 5.90 inches) |
|
|
|
|
Width |
203.68 mm (8.02 inches) |
|
|
|
|
Depth |
203.68 mm (8.02 inches) |
|
|
|
|
Weight |
|
|
|
|
|
Weight with packaging |
5.75 kg (12.68 lb) |
|
|
|
|
Weight with stand assembly and |
4.29 kg (9.46 lb) |
|
cables |
|
|
|
|
|
|
|
|
Weight without stand assembly |
|
|
(for wall mount or VESA mount |
3.65 kg (8.05 lb) |
|
considerations - no cables) |
|
|
|
|
|
Weight of stand assembly |
0.64 kg (1.41 lb) |
|
|
|
|
|
|
|
Environmental
Model |
ST2420L/ST2421L |
|
|
|
|
Temperature |
|
|
|
|
|
Operating |
0° to 40° C (32° to 104°F) |
|
|
|
|
Non-operating |
Storage: -20° to 60° C (-4° to 140° F) |
|
Shipping: -20° to 60° C (-4° to 140° F) |
|
|
|
|
|
|
|
|
Humidity |
|
|
|
|
|
Operating |
10% to 80% (non-condensing) |
|
|
|
|
Non-operating |
Storage: 5% to 90% (non-condensing) |
|
Shipping: 5% to 90% (non-condensing) |
|
|
|
|
|
Altitude |
|
|
|
|
|
Operating |
4,485 m (14,700 ft) max |
|
|
|
|
Non-operating |
12,191 m (40,000 ft) max |
|
|
|
|
Thermal dissipation |
102.36 BTU/hour (maximum) |
|
68.24 BTU/hour (typical) |
|
|
|
|
|
|
|
|
|
|
|
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 Monitor manufacturing process, it is not uncommon for one or more pixels to become fixed in an unchanging state. The visible result is a fixed pixel that appears as an extremely tiny dark or bright discolored spot. When the pixel remains permanently lit, it is known as a "bright dot." When the pixel remains black, it is known as a "dark dot."
In almost every case, these fixed pixels are hard to see and do not detract from display quality or usability. A display with 1 to 5 fixed pixels is considered normal and within competitive standards. For more information, see Dell Support site at: support.dell.com.
Maintenance Guidelines
Caring for Your Monitor
CAUTION: Read and follow the Safety Instructions before cleaning the monitor.
CAUTION: Before cleaning the monitor, unplug the monitor from the electrical outlet.
For best practices, follow the instructions in the list below while unpacking, cleaning, or handling your monitor:
•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.
•Use a lightly-dampened, warm cloth to clean the monitor. Avoid using detergent of any kind as some detergents leave a milky film on the monitor.
•If you notice a white powder when you unpack your monitor, wipe it off with a cloth.
•Handle your monitor with care as dark-colored monitors may scratch and show white scuff marks more than lighter-colored monitors.
•To help maintain the best image quality on your monitor, use a dynamically changing screen saver and turn off your monitor when not in use.
Back to Contents Page
Loading...