Dell St2220t Users Guide

							 
Notes, Notices, and Cautions  
Information in this document is subject to change without notice.  
 
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 registered trademarks or 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.  
Model ST2220Tc   
 
   
   About Your Monitor  
Setting Up Your Monitor  
Operating the Monitor  
Troubleshooting   
Appendix  
 
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.  
						

							   
Back to Contents Page    
About Your Monitor   
ST2220T  monitor Users Guide  
Package Contents  
Your monitor comes with all the items shown below. Ensure that you have all the items. If something is missing,  contact Dell .   
    Package Contents
Product Features
Identifying Parts and Controls
Monitor Specifications
Universal Serial Bus (USB) Interface
Plug and Play Capability
Maintenance Guidelines
NOTE:  Some items may be optional and may not ship with your monitor. Some features or media may not be available in certain 
countries.
 
    l Monitor with stand  
  l Power cable   
  l Audio cable   
  l VGA cable   
  l DVI cable (Optional)     
						

							   
Product Features  
The  ST2220T  monitor has an active matrix, thin - film transistor (TFT), liquid crystal display (LCD). The monitor features include:  
■  21.5 inches (546.8 mm) diagonal.   
■  1920 X 1080 resolution, plus full - screen support for lower resolutions.   
■  Touch sensitive — detects your finger or any other pointing device close to the screen.  
■  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 media which include an information file (INF), Image Color Matching File (ICM), and product documentation.   
■  Energy Saver feature for Energy Star compliance.   
■  Security lock slot.  
■  2 x 2 watt built - in speakers.  
Identifying Parts and Controls  
Front View     l USB up stream cable (enables USB ports and touch 
function on the monitor)   
l Documentation (Safety Information, Quick Start Guide, 
and CD)   
l Cleaning cloth   
 
Front View  
Label Description  
						

							Back View  
Side View  
Bottom View  1  Preset Modes select
2 Brightness/Contrast select
3  OSD menu select
4  EXIT
5 Power button (with light indicator)
 
Back view   Back View with monitor stand  
Label Description Use
1 Barcode serial number label T o contact Dell for technical support.
2 Regulatory rating label Lists the regulatory approvals.
3 Cable holder T o organize cables by placing them through the holder.
4 USB downstream port To connect the USB cable.
5 Security lock slot T o help secure your monitor.
 
 
    Right view    
						

							Monitor Specifications  
The following sections give you information about the various power management modes and pin assignments for various connectors of your monitor.   
Power Management Modes  
If you have VESAs 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 the computer detects input from keyboard, mouse, or other input devices, the monitor automatically resumes functioning. 
The following table shows the power consumption and signaling of this automatic power saving feature:   
Activate the computer and wake up the monitor to gain access to the  OSD .   
Bottom view  
Label Description
1 Power cord connector
2 DVI connector
3 HDMI connector
4 VGA connector
5 Audio Line - in
6 USB upstream connector
VESA Modes Horizontal Sync Vertical Sync  Video Power Indicator Power Consumption
Normal operation and 
USB active Active Active Active  White 55 W (maximum)
Normal operation Active Active Active  White 28  W (typical)
Active - off mode Inactive Inactive Blanked Amber 1  W
Switch off -   -   -   Off 0.5  W
  NOTE:  The OSD functions in the Normal operation mode. One of the following messages appears when the menu key is touched in Active - off mode.  
  or 
        
						

							  Zero power consumption in OFF mode can only be achieved by disconnecting the main cable from the power adapter.  
Pin Assignments  
VGA Connector  
 
 
 NOTE:  This monitor is  ENERGY STAR ® - compliant.
Pin Number 15 - pin Side of the Co nnected Signal Cable
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
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  
						

							 
 
Universal Serial Bus (USB) Interface  
This section gives you information about the USB ports that are available on the left side of your monitor.  
USB Upstream Connector  14 +5V power
15 Self test 
16 Hot Plug Detect
17 TMDS RX0 -
18 TMDS RX0+
19 TMDS Ground
20 Floating
21 Floating
22 TMDS Ground
23 TMDS Clock+
24 TMDS Clock -
Pin Number 19 - pin Side of th e C o nnected  Signal Cable
1 T.M.D.S. Data 2 -
2 T.M.D.S. Data 2 Shield
3 T.M.D.S. Data 2+ 
4 T.M.D.S. Data 1+
5 T.M.D.S. Data 1 Shield 
6 T.M.D.S. Data 1 -
7 T.M.D.S. Data 0+
8 T.M.D.S. Data 0 Shield 
9 T.M.D.S. Data 0 -
10 T.M.D.S. Clock +
11 T.M.D.S. Clock Shield 
12 T.M.D.S. Clock  -  
13 CEC
14 Reserved (N.C. on device) 
15 SCL
16 SDA
17 DDC/CEC Ground 
18 +5V Power 
19 Hot Plug Detect 
NOTE:   This monitor supports High - Speed Certified USB 2.0 interface
Transfer speed   Data Rate   Power Consumption
High speed  480 Mbps  2.5W (Max., each portyf
Full speed  12 Mbps  2.5W (Max., each portyf
Low speed  1.5 Mbps  2.5W (Max., each portyf  
						

							   
USB Downstream Connector  
   
USB Ports  
l 1 upstream at bottom   
l 3 downstream at side   
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 the system can configure itself and optimize the monitor settings. Most monitor 
installations are automatic; you can select different settings if desired. For more information about changing the monitor settings, see  Operating the monitor .  
Monitor Specifications  Pin Number 4 - pin Side of the connector
1 DMU
2 VCC
3 DPU
4 GND
Pin Number 4 - Pin Side of the Signal Cable
1 VCC
2 DMD
3 DPD
4 GND
NOTE:  USB 2.0 functionality requires a USB 2.0 - capable computer  
NOTE:  The monitors USB interface works only when the monitor is on or in power save mode. If you turn off the monitor and then turn it on, the attached peripherals may take a few seconds 
to resume normal functionality. 
Screen type Active matrix  -  TFT LCD  
Panel Type IPS
Screen dimensions 21.5 inches (21.5 - inch measured diagonally viewable image 
size)
Preset display area:  
Horizontal:  
Vertical:      
475.2 mm (18.71 inches)  
267.3 mm (10.52 inches)  
Pixel pitch 0.2475 mm
Viewing angle 178° (verticalyfW\SLFDO
						

							*  ST2220T color gamut (typical) is based on CIE1976 (82%) and CIE1931 (72%) test standards.  
Touch Screen Specifications  
   
Touch screen OS compatibility  
   
   
Resolution  Specifications  
Video Supported Modes  
   
Preset Display Modes  Color Depth 16.7 mil colors
Color Gamut 82%*
Touch Technology Optical touch 
Touch Method Finger, stylus or any pointer
Stylus Diameter Minimum 7 mm
Capabilities Mouse functionality — click, drag, double - click and right - click   
Touch functionality — support Win7 multi - touch gestures  
Resolution 1920 X 1080
Accuracy +/ - 2.5 mm over 95% of touchable area (Microsoft Windows 7 
compliant ) 
Touch Activation Force No pressure required
Touch Durability Unlimited
Touch Response Time Typical response time 15 ms
Function  XP   Vista  Win7 
Starter  Win7 
Home 
Basic  Win7 
Home 
Premium  Win7 
Ultimate   Win7 Pro  Win7 
Enterprise  Other 
Operating 
Systems 
Single - touch - Yes Yes Yes Yes Yes Yes Yes -
Multi - touch(two points) - - - - Yes Yes Yes Yes -
NOTE:  
l Support native Win7 multi - touch. (plug & play)   
l Support single - touch (mouse behavior) in Vista. (Need to install touch screen driver. Please find the touch screen driver for Vista in the CD)   
l Supports Windows Vista and Windows 7 operating systems only.   
l Touch screen is out of alignment when the desktop is not full screen.   
l Win7 OS will automatically install touch screen driver each time when the USB cable is plugged into a USB port.   
l If you want to enable the touch screen functionality on the secondary monitor:  
1. Set the primary monitor as an extended display.  
2. Go to Start  - > Control Panel  - > Tablet PC Settings. Click Setup and follow the instructions on the screen.   
Horizontal scan range 30 kHz to 83 kHz (automatic)
Vertical scan range 56 Hz to 76 Hz (automaticyf
Optimal preset resolution 1920 x 1080 at 60 Hz
Highest preset resolution 1920 x 1080 at 60 Hz
Video display capabilities (DVI 
playback)  480i/480p/576i/576p/720p/1080i/1080p 
(Supports HDCP)  
						

							  
Electrical  Specifications  
Physical  Characteristics  
Environmental  Characteristics  Display Mode   Horizontal 
Frequency 
(kHz)   Vertical 
Frequency (Hz)   Pixel Clock 
(MHz)   Sync Polarity 
(Horizontal/Vertical)  
640 x 350   31.47   70.09   25.18   +/ -  
640 x  400   31.47   70.09   25.18   - / +  
640 x 480   31.47   59.94   25.17   - / -  
640 x 480   31. 50   75.00   31.5   - / -  
720 x 400  31.47  70.08  28.32  - /+ 
800 x 600  37.88  60.32  40.00  +/+ 
800 x 600  46.880  75.00  49.50  +/+ 
1024 x 768  48.36  60.00  65.00  - / -  
1024 x 768  60.02  75.03  78.75  +/+ 
1152 x 864  67.50  75.00  108.00  +/+ 
1280 x 1024  63.98  60.02  108.00  +/+ 
1280 x 1024  79.98  75.02  135.00  +/+ 
1920 x 1080 - R  66.587  59.934  138.50  +/ -  
1920 x 1080   55.62   49.92   141.50   - /+  
Video input signals Analog RGB, 0.7 Volts +/ -  5%, positive polarity at 
75 ohm input impedance  
Digital DVI - D TMDS, HDMI, 600mV for each 
differential line, positive polarity at 50 ohm input 
impedance
Audio Input and Output signals Input signal level: 2Vrms without chipping
Synchronization input signals Separate horizontal and vertical synchronizations, 
polarity - free TTL level, SOG (Composite SYNC on 
green)
AC/DC Adaptor input voltage/frequency/current 100 to 240 VAC/50 or 60 Hz  +  3 Hz/1.6A (Max.) 
 For use only with power supply DELL, 
DA65NS4 - 00.  
Inrush current 120 V: 30 A (Max.)  
240 V: 60 A (Max.) 
Connector type 15 - pin D - sub miniature, blue connector; DVI - D, white connector; HDMI, Black connector
Signal cable type Digital: Detachable, DVI - D, Solid pins, shipped detached from the monitor 
Analog: Detachable, D - Sub, 15pins, shipped attached to the monitor  
HDMI: Detachable, HDMI - A, Solid pins, shipped without cable  
Dimensions 
Height  14.96 inches (380.1 mm)
Width 20.79 inches (528.1 mm)
Depth 2.3 inches (58.5 mm)  
Weight
Weight with packaging 8.03 kg (17.7 lbs)
Weight with cables 6.30 kg (13.9 lbs)
Temperature  
Operating 0° to 40° C (32° to 104° Fyf