BenQ T221wa User Manual

							
1. The following frequency range is the working period. If the entered mode\
 between below 
period but not match the frequency of supported timing, display optimiza\
tion would not be 
assured. If the entered mode is out of the working period, the display w\
ill be blanking 
(just show “INPUT SIGNAL OUT OF RANGE”) then go to power saving.
2. Basically, mode judgment is regardless the sync polarity except both or more mode\
s that 
are all belong to the supported timing list and could be judged by sync \
polarity only.
3. In the meantime, real entered frequency of the supported timing is no\
t requested exactly.
4. Normalization of VGA card’ s deviation will be acceptable.
5. Horizontal Frequency            
6. Vertical Frequency            
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Technical Features and Specifications
Interface Frequency
30 ~ 82KHz
56 ~ 76Hz
Net
Net
Tilt Angle
473.8(H)x296.1(V)mm
Analog
Digital
Operating
Condition
Storage
Condition
0.282(H)*0.282(V)mm
D-sub
DVI-D(Optional)
-5°~20°
About 4.9kg
 About 510（W）x 424(H)x 202（D）mm
AC
Consumption
AC 100~240V, 50Hz/60Hz,1.2A
Temperature
Humidity
Altitude
Temperature
Humidity
Altitude
Active:
						

							
1.Background
The traditional monitors have the function of electricity-saving dormanc\
y. But the interval 
of dormancy is difficult to decide. If the interval is long, the purpose of saving electri\
city 
can not be achieved. While the interval is short, your computer and LCD \
monitor would 
be dormant often. When the LCD monitor becomes dormant, the back lights \
will be 
turned off immediately. The frequent turn-on and turn-off of lights will result in the 
lightness uneven and even shortening the life of the lights. 
2.Our solution to the dilemma - Monitor Life-Extension function
In view of that, we have designed the function of Monitor Life-Extension\
. Once you 
select the option of  “Advanced Power Saving Mode” in the OSD menu\
, and then you 
can not only save electricity, but extend the life of the lights.
3.Working principle of the Monitor Life-Extension function
To minimize the impact of frequent turn-on and turn-off of LCD monitor, the 
Life-Extension function decreases the electricity supplied to the back-l\
ight of LCD 
monitor gradually, instead of cut it off right away when PC enters sleeping or off mode. 
Please see following comparison graphics for details.
This “Slow-Start-n-Delay-Off” approach minimizes the transit of electricity and temperature 
caused by the turn-on and turn-off of LCD monitor. Therefore, the decay of backlights of 
TFT-LCD can be controlled in the certain level which is much less than it w\
as.
- 9 -
Addendum
Advanced Power Saving Mode
Power
ONPower Saving Start
60%30%10%
Power
 ON                     Sleep Start    Power Saving Start
5s                                     7mins
* Standard Power Saving Mode (without Monitor Life-Extension function)\
* Advanced Power Saving Mode (with Monitor Life-Extension function)
  
						

							
4.The side effect of the Monitor Life-Extension function (why not 
preset Advanced Power Saving Mode as default?)
According to the request of EPA (US Environmental Protection Agency) to power 
management of monitors, the power consumption of the monitor must go dow\
n to below 
3 watts within 3 seconds after the monitor steps in power saving mode. B\
ut the 
Life-Extension function decreases the electricity supplied to the backli\
ghts of LCD 
monitor gradually. Therefore, the Monitor Life-Extension function has conflict with the 
requirement of EPA in the first 7 minutes after entering sleeping mode. Even 
though,comparing the advantages of both conditions, we still recommend y\
ou strongly 
to set your monitor in Advanced Power Saving mode.
5. l How to engage the Monitor Life-Extension function?
You may simply use the OSD control to activate the Monitor 
Life-Extension function.
- 10 -
1. Press arbitrarily 4 buttons (other than the Power Switch) on the le\
ft to activate the 
    OSD menu.
2. Press        button to enter function menu.
3. Press        or        button to select system         .
4. Press          to confirm the selection.
5. Press        or        button to select POWER SAVING MODE        .
6. Press         to confirm the selection.
7. Press        or        button to select the advanced option         i\
n the POWER SAVING 
    MODE functions.
8. Press         to confirm the selection.
9. Press        button to exit the higher level menu.
10. Press the         button to exit the OSD menu.

						

							
- 11 -
1.This device complies with Part 15 of the FCC Rules. Operation is subje\
ct to the 
following two conditions (1) this device may not cause harmful interfe\
rence, and (2) 
this device must accept any interference received, including interferenc\
e that may 
cause undesired operation.
2.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 resident\
ial installation. 
This equipment generates, uses and can radiate radio frequency energy an\
d, if not 
installed and used in accordance with the instructions, may cause harmfu\
l 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 eq\
uipment off 
and on, the user is encouraged to try to correct the interference by one\
 or more of the 
following measures:
3.Reorient or relocate the receiving antenna.
4.Increase the separation between the equipment and receiver.
5.Connect the equipment to an outlet on a circuit different from that to which the receiver 
is connected.
6.Consult the dealer or an experienced radio/TV technician for help.
WARNING:
FCC compliance
 Any unauthorized modification to this equipment could result in 
the revocation of the authorization to operate the equipment and 
void the product warranty.