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1. Read all of these instructions.

2. Save these instructions for later use.

3. Unplug this monitor from the
wall outlet before cleaning.  Do not
use liquid cleaners or aerosol
cleaners. Use a damp cloth for
cleaning.

4. Do not use attachments not recommended by
the monitor manufacturer as they may cause
hazards. 

5. Do not use this monitor near water, e.g., near a
bathtub, washbowl, kitchen sink, or laundry tub,
in a wet basement, or near a swimming pool, etc. 

6. Do not place this monitor on an
unstable cart, stand, or table.  The
monitor may fall, causing serious
injury to a child or adult, and
serious damage to the appliance. 

7. Slots and openings in the
cabinet and the back or bottom are
provided for ventilation, to ensure
reliable operation of the monitor,
and to protect it from overheating.

These openings must not be blocked or covered.
The openings should never be blocked by
placing the monitor on a bed, sofa, rug, or other
similar surface. This monitor should never be
placed  near or over a radiator or heat register.
This monitor  should not be placed in a built-in
installation such as a  bookcase unless proper
ventilation is provided.

8. This monitor should be operated
only from the type of power source
indicated on the marking label. If
you are not sure of the power
supplied to your home, consult

your monitor dealer or local power company.

9. This monitor is equipped with a
3-wire grounding-type plug, That
is, a plug having a third
(grounding) pin. This plug will
only fit into a grounding-type

power outlet. This is a safety feature.  If you are
unable to insert the plug into the outlet, contact
your electrician to replace your obsolete outlet.
Do not defeat the purpose of the grounding-type
plug. 

10. Do not allow anything to rest
on the power cord.  Do not locate
this monitor where the cord will be
abused by people walking on it. 

11. Follow all warnings and instructions marked
on the monitor.  

IMPORTANT SAFEGUARDS

12. For added protection for this

monitor during a lightning storm,
or  when it is left unattended and
unused for long periods of time,
unplug it from the wall outlet. This

will prevent damage to the monitor and/or the
computer due to lightning and power line surges. 

13. Do not overload wall outlets and extension
cords as this can result in fire or electric shock. 

14. Never push objects of any kind into this
monitor through cabinet slots, as they may touch
dangerous voltage points or short out parts that
could result in a fire or electric shock. Never spill
liquid of any kind on the monitor. 

15. Do not attempt to service this
monitor yourself, as opening or
removing covers may expose you
to dangerous voltages or other
hazards.  Refer all servicing to

qualified service personnel. 

16. Unplug this monitor from the wall outlet and
refer servicing to qualified service personnel
under  the following conditions: 

a. When the power cord or plug is damaged or
frayed. 

b. If liquid has been spilled into the monitor. 

c. If the monitor has been exposed to rain or
water. 

d. If the monitor does not operate normally by
following the operating instructions.  Adjust only
those controls that are covered by the operating
instructions, as improper adjustment of other
controls may result in damage and will often
require extensive work by a qualified technician
to restore normal operation. 

e. If the monitor has been dropped or the cabinet
has been damaged. 

f. When the monitor exhibits a distinct change in
performance, this indicates a need for service. 

17. When replacement parts are
required be sure the service
technician has used replacement
parts specified by the manufacturer
that have the same characteristics as

the original part.  Unauthorized substitutions
may result in fire, electric shock, or other
hazards. 

18. Upon completion of any service or repairs to
this monitor, ask the service technician to
perform routine safety checks to determine that
the monitor is safe to operate. 

FEDERAL COMMUNICATIONS COMMISSION 
RADIO FREQUENCY INTERFERENCE STATEMENT

NOTE :  

This equipment has been tested and found to comply with the limits

for a Class B digital device, pursuant to Part 15 of the FCC Rules.  These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.  This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in
accordance   with the instructions, may cuase harmful interference to radio
communications.  However, there is no guarantee that interference will not
occur in a particular installation.  If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures :  
- Reorient or relocate the receiving antenna.  
- Increase the separation between the equipment and receiver. 
- Connect the equipment to an outlet on a  circuit different from that to   

which the receiver is connected. 

- Consult the dealer or an experienced radio or TV technician for help. 

CAUTION : Any changes or modifications not expressly approved by the  

party responsible for compliance could void the user

s authority

to operate the equipment. 

CANADIAN NOTICE

AVIS CANADIEN

This Class B digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.  

Cet appareil numérique de la Class B respecte toutes les exigences du
Règlement sur le matériel brouilleur du Canada.

The power cord is used  as a main disconnect device.  Disconnect the
power cord before servicing.  The outlet must be installed near the monitor
and must be easily accessible.

As an ENERGY STAR    Partner, Computer Technology Link, Inc. has
determined that this product meets the Energy Star    guidelines for energy
efficiency.

Summary of Contents for 21dn

Page 1: ...Model No 21dn COLOR MONITOR USER S GUIDE C T L ...

Page 2: ... personnel under the following conditions a When the power cord or plug is damaged or frayed b If liquid has been spilled into the monitor c If the monitor has been exposed to rain or water d If the monitor does not operate normally by following the operating instructions Adjust only those controls that are covered by the operating instructions as improper adjustment of other controls may result i...

Page 3: ... install operate and get the best performance from your monitor Please read this user s guide carefully before installing your monitor then keep it near your monitor for quick reference First please check that the contents of the box corresponds with the following checklist Color monitor Power cord Signal cable User s Guide Warranty Handbook Registration Card If any item is missing or damaged plea...

Page 4: ...he color temperature RGB gain value for the best possible screen color and intensity Press the menu button and activate the Self Diagnosis menu to determine whether your monitor is functioning normally not receiving a signal or is receiving a signal that is out of scanning range Activate the higher refresh rates of the monitor to stabilize the screen and eliminate the annoying flicker that contrib...

Page 5: ...f your keyboard or move your mouse If the signal cable is connected loosely or disconnected the power saving feature will not operate DISPLAY DATA CHANNEL FOR PLUG AND PLAY If you use the monitor with a computer that complies with DDC1 2B CI of VESA the host video card automatically configures itself without your intervention in a way that best fits the attached monitor The Display Data Channel DD...

Page 6: ...ow on the OSD window Increase the value of any selected function Move cursor to the left window on the OSD window Decrease the value of any selected function Launch OSD On Screen Display MENU window Move cursor to the high window on the OSD window Increase the value of V size or V center Move cursor to the low window on the OSD window Decrease the value of V size or V center Hot Key BRIGHTNESS CON...

Page 7: ...re in a S shape PINCUSHION TRAPEZOID PIN BALANCE PIN S CONTROL PARALLELOGRAM Adjust the width horizontal size and the height vertical size of the display H SIZE V SIZE Adjust the horizontal picture moire cancellation H MOIRE H LINEARITY V LINEARITY Adjust the horizontal linearity Adjust the vertical linearity Select language for OSD 5 languages LANGUAGE Adjust the position of the display horizonta...

Page 8: ...V 50 160 Hz Reset the screen to the Factory Preset Display Settings Display a RGB Color Bar to determine whether the screen color is expressed normally or not TEST PATTERN RECALL Display horizontal vertical frequency and polarity STATUS POWER SAVER YES VESA DPMS operation NO NO DPMS operation ICON CONTROL FUNCTION Select a input signaling type between D sub and BNC connector BNC D SUB Adjust the r...

Page 9: ...creen are not straight Check SPECIFICATIONS CDT Size 21 inch Diagonal visible image area 20 inch Dot Pitch 0 25 mm Synchronization Horizontal 30 107 KHz Vertical 50 160 Hz Plug and Play DDC1 2B CI Power Saving EPA VESA DPMS Nutek Compliant Power Source 100 240 Vac 50 60Hz Free Voltage Power Consumption 135 W Dimension W x H x D 494 x 500 x 518mm set with stand Weight unpacked lbs Kg 61 7 28 0 Oper...

Page 10: ...ECTOR Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Signal Red Green Blue GND GND GND Red GND Green GND Blue 5Vdc GND H Sync GND V Sync Bi directional Data SDA Horizontal Sync Vertical Sync VCLK Data Clock SCL 1 6 15 10 GND Ground 14 ...

Page 11: ...S N 9978628318 ...

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