BenQ Pb8250 Digital Projector Installation Series Users Manual

							Operation 25
Using the menus
The projector is equipped with on-screen display (OSD) menus for making various adjust-
ments and settings.
There are 10 different menu languages. (Refer to page 31 for more details.)
The following example describes the adjustment of the keystone.  
1. Press Menu on the projector or remote 
control to turn the on-screen menu on.4. Adjust keystone values by press-
ing 3 Left/ Right 4on the pro-
jector or  3 Ke ystone/ Ke ystone 
4 on the remote control.
2. Use 3 Left/ Right 4on the projector or  
3 Ke ystone/ Keystone 4 on the remote 
control to select Display menu.
3. Use 5Exit or 6Menu on the projector 
or 6Down/ Menu on the remote 
control to select Ke ystone. 5. Press5Exit on the projector or 
press  Exit twice* on the 
remote control to leave and save 
the settings.
*The first press leads you back to the
submenu and the second press closes
the on-screen menu. 
						

							Operation 26
1. Display Menu
Analog RGB/ DVI/ YPbPr (480p, 576p, 720p, 1080i) signal input 
YCbCr (480i, 576i)/ S-Video/ Video signal input
FUNCTIONDESCRIPTION
KeystoneCorrects any keystoning of the image. Refer to page 19 for more infor-
mation.
Brightness
Adjusts the brightness of the image. The higher the value, the brighter 
the image. And lower the setting, darker the image. Adjust this control 
so the black areas of the image appear just as black and that detail in the 
dark areas is visible.
Contrast
Adjusts the degree of difference between dark and light in the image. 
The higher the value, the greater the contrast. 
Phase
This function allows you to adjust the clock 
phase to reduce image distortion. 
H SizeAdjusts the horizontal width of the image. 
FUNCTIONDESCRIPTION
KeystoneAs above.
BrightnessAs above.
ContrastAs above.
Color Increases or decreases the color intensity of the image.
TintAdjusts the color tones of the image. The higher the value, the more red-
dish the image becomes. The lower the value, the more greenish the 
image becomes.
0-25+25
-25
0+25 
						

							Operation 27
2. Image Menu
Analog RGB/ DVI signal input
*About color temperatures:
There are many different shades that are considered to be “white” for various purposes. One 
of the common methods of representing white color is known as the “color temperature”. A 
white color with a low color temperature appears to be reddish white. A white color with a 
high color temperature appears to have more blue in it.
YPbPr (480p, 576p, 720p, 1080i) signal input
FUNCTIONDESCRIPTION
Auto ResizeMakes the best fit of the image to the screen,
1. On 2. Off 3. 16:9
H Position
Adjusts the horizontal posi-
tion of the projected image. 
V Position
Adjusts the vertical position 
of the projected image. 
Color TempAdjusts the white color. The higher the value, the more reddish white the 
image becomes. The lower the value, the more bluish white the image 
becomes.*
InformationShows the current image resolution.
FUNCTIONDESCRIPTION
RatioUsers have 2 options for the image ratio.
1. 4 : 3     2. 16 : 9
H PositionAs above.
V PositionAs above.
ColorIncreases or decreases the color intensity of the image.
TintAdjusts the color tones of the image. The higher the value, the more red-
dish the image becomes. The lower the value, the more greenish the image 
becomes.
Color TempAs above.
-30+30
-30+30 
						

							Operation 28
YCbCr (480i, 576i)/ S-Video/ Video signal input
FUNCTIONDESCRIPTION
RatioAs above.
SystemShows the Video input system format,
1.NTSC   2. PAL   3.SECAM   4. YUV.
SharpnessAdjusts the image to make it look sharper or softer.
Color TempAs above.
InformationAs above. 
						

							Operation 29
3. Source Menu  
FUNCTIONDESCRIPTION
Mirror
The projector can be installed on a ceiling or behind a screen, or with one 
or more mirrors. Contact your dealer for the ceiling mount bracket 
(optional accessory) if you need to install the projector on your ceiling.
• Floor front: Select this setting 
with the projector set on the 
floor and audience viewing the 
projected images from the front 
side of the screen. This is the 
most common setting.
• Ceiling front: Select this setting 
with the projector suspended 
from the ceiling and audience 
viewing the projected images 
from the front side.
• Floor rear: Select this setting 
when the projector is placed near 
the floor and behind the screen. 
A special rear projection screen is 
required.
•
 Ceiling rear: Select this setting 
when the projector is suspended 
from the ceiling and placed 
behind the screen. A special rear 
projection screen is required.
SourceShows the current signal source.
Vo l u m e
Adjusts the volume level.
Tr eb le
Adjusts the treble level. (-5 ~ 5)  
						

							Operation 30
Bass
Adjusts the bass level. (-5 ~ 5) 
Mute
OffOn 
						

							Operation 31
4. Control Menu
FUNCTIONDESCRIPTION
Language
Language sets the language for the OSD control menus.
Use the 3 / 4 key to select the desired language from among English, 
French, German, Italian, Spanish, Russian, Traditional Chinese, Simplified 
Chinese, Japanese and Korean. 
OSD
OSD Pos.
Selects a desired OSD position.
OSD Time
Sets the length of time the OSD will remain active after your last button 
press. The range is from 5 to 60 seconds.
Setup
Source Scan
Sets whether the projector searches automatically for input signals. If the 
source scan is on, the projector will search for input signals in the follow-
ing order: Analog RGB --> DVI-A --> DVI-D --> Analog YPbPr --> S-
Video --> Composite Video until it acquires a signal. If the function is not 
activated, the projector selects the last input signal.
Ke ystone Hold
When selected, preserves the last keystone correction value even when the 
projector is restarted.
Mirror Hold
When selected, preserves the last mirror correction value even when the 
projector is restarted.
Blank Time
Determines the length of time before the projector will automatically 
shutdown when Blank is activated. 
Auto Off
Sets the length of time before the projector will automatically shutdown 
when there is no input signal detected.
User Logo
Enables the user to select which logo screen will appear during projector 
start-up. Three modes are available: Default (BENQ logo), black screen or 
blue screen. 
						

							Operation 32
Preset Mode
Preset modes are provided so you can optimize your projector image set-
up to suit your program type.
PC/ DVI Signal input
1.Presentation Mode: Is designed for presentations. The brightness is 
emphasized in this mode.
2.Vivid Mode: Is perfect for playing games. The color saturation and 
brightness are well-balanced.
3.Video Mode: Is suitable for cinematic enjoyment displaying images 
in their natural color.
4.Economic Mode: Use this mode to reduce the system noise and 
reduce the power consumption by 20%. The lamp life is also 
extended with lower light output.
YPbPr/ YCbCr/ S-Video/ Video Signal Input
1.Gaming Mode: Is suitable for playing video games in a bright living 
room.
2.Video Mode: With a higher color temperature, it is suitable for 
enjoying TV movies. 
3.Cinema Mode: With a lower color temperature, it is suitable for 
enjoying cinematic movies.
4.Economic Mode: Use this mode to reduce the system noise and 
reduce the power consumption by 20%. The lamp life is also 
extended with lower light output.
ResetReturns all settings to the factory preset values.
Lamp HourDisplays the number of hours the lamp has been used. 
						

							Operation 33
5. PIP (Picture In Picture) Menu
Your projector is capable of displaying images simultaneously from two input sources, which 
enhances your presentation in a more effective way.
These functions are available only when the input source is PC and the PIP source is Video 
or S-Video.  
FUNCTIONDESCRIPTION
PIP SourceSelects the source for the PIP.
PIP Size
Press the 3 / 4 keys to scroll through the four alternatives: Off, Small, 
Medium, Large. 
 When the resolution of the PC signal is 1280x1024 (SXGA), the
selected Large PIP size will be reduced to the Medium size.
PIP Position
Selects a desired position for the PIP.  
H PositionAdjusts the horizontal position of the PIP image. 
V PositionAdjusts the vertical position of the PIP image.
More OptionsPress the 3 / 4 keys to select more PIP functions including Brightness, 
Contrast, Color, Tint, Sharpness and System. 
BrightnessAdjusts the brightness of the PIP image.
ContrastAdjusts the degree of difference between dark and light in the PIP image. 
The higher the value, the greater the contrast. 
ColorIncreases or decreases the color intensity of the PIP image.
TintAdjusts the color tones of the PIP image. The higher the value, the more 
reddish the image becomes. The lower the value, the more greenish the 
image becomes.
SharpnessAdjusts the image to make it appear sharper or softer
SystemShows Video input system format, NTSC, PAL, SECAM or YUV. 
						

							Maintenance 34
Maintenance
Your projector needs little maintenance. Things you have to do on a regular basis are keep 
the lens clean and clean the air filter to prevent overheating.
Never remove any parts of the projector except the lamp and air filter. Contact your dealer if 
other parts needs replacing.
Cleaning the lens
Clean the lens whenever you notice dirt or dust on the surface. 
■ Use a canister of compressed air to remove dust. 
■ If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens cleaner to 
gently wipe the lens surface.
Never rub the lens with abrasive materials.
Cleaning the projector case
Before you clean the case, turn the projector off and unplug the power cord.
■ To remove dirt or dust, wipe the case with a soft, dry, lint-free cloth.
■ To remove stubborn dirt or stains, moisten a soft cloth with water and a neutral detergent. 
Then wipe the case.
Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the
case.
Cleaning and replacing the air filters
It is necesssary to clean the air filters periodically. If the filters are not cleaned, they can 
become clogged with dust and prevent proper ventilation. This can cause overheating and a 
malfunction of the projector.
A warning message like the one pictured to the 
right will be displayed for 10 seconds every 300 
hours to remind you to clean the filters.
1. Turn the project off and wait until the fans 
stop running.
2. Disconnect the projector from any cables.
3. Open one air filter cover from the left and draw another one from the front sides of the 
projector.
From the front side:From the left side: