BenQ Ob8140/pb8240/pb8250 Digital Projector Installation Series Users Manual

Setting Up Your Projector 15
Connecting to Video or S-Video Devices
 
If the selected video image is not displayed after the projector is turned on and the correct
video source has been selected, check that the video source is turned on and operating cor-
rectly. Also check that the signal cables have been connected correctly.
Connecting to Display Devices
If you want to monitor your presentation close-up on a monitor as well as on the screen, you 
can connect the RGB signal output port on the projector...

Setting Up Your Projector 16
Adjusting the Height
The projector is equipped with 2 quick-release adjuster feet.
1. Lift the projector up and press 
the adjuster button to release 
the adjuster. The adjuster will 
drop into position and be 
locked. 
2. Screw the rear adjuster feet to 
fine-tune the projection angle.
If the screen and the projector are not per-
pendicular to each other, the projected
image becomes vertically trapezoidal. To
correct this situation, adjust the value of
Keystone in the...

Setting Up Your Projector 17  
There is 3% ~ 5% tolerance among these numbers due to optical component variations.
* 1m = 3.28 feet, 1 feet = 0.305m,   1m = 100cm,   1 feet = 12 inches
PB8250 (XGA) screen size chart (4:3 aspect ratio)
Distance
from
screenDiagonal measurementDistance
from
screenDiagonal measurement
Minimum
zoomMaximum
zoomMinimum
zoomMaximum
zoom
feet inch feet inch feet inch meter cm meter cm meter cm
4 48 2.49 29.9 3.05 36.6 1 100 0.62 62.2 0.76 76.2
6 72 3.73 44.8 4.57 54.9 1.5 150...

Operation 18
Operation
Start Up
1. Switch all of the connected equipment on.
2. Plug the power cord into the projector and into a wall socket.
3. Turn on the wall socket switch (where fitted).
4. Turn the main power switch on. The Power indicator lights orange. 
5. Press and hold Power on the remote control or projector to start the unit. The Power 
indicator light flashes green when the power is turned on.
6. The start up procedure takes about 30 seconds after pressing Power. In the later stage 
of...

Operation 19 continuously: “Analog RGB Searching”,  “DVI-A Searching”,  “DVI-D Searching”,  “Ana-
log YPbPr Searching”,  “S-Video Searching”,  “Composite Video Searching”.
8. You can also press Source on the projector or remote control to select your desired 
input signal. For more information, refer to page 21.
If the frequency/ resolution of the input signal exceeds the projector’s operating range, you
will see the message “Out of Range” displayed on a blank screen.
Shutdown
1. Press Power and a...

Operation 20
Digital Keystone Correction
Keystoning refers to the situation where the projected image is noticeably wider at either the 
top or bottom. It occurs when the projector is not perpendicular to the screen. 
To correct this, besides adjusting 
the height of the projector, you will 
need to manually correct it follow-
ing ONE of these steps. 
1. Press 3 Left/ Right 4 (hot key) 
on the control panel of the projec-
tor to display the status bar labelled 
Ke ystone. Press Right 4to correct...

Operation 21
Source Selection
To sequentially select input sources, press 
Source on the projector control panel or the 
remote control. It may take you a few sec-
onds when the projector is searching for 
input signals. The selected source will be 
displayed at the bottom right of the screen 
for 3 seconds. 
Auto Adjustment
In  som e cases , you  m ay  ne e d to  optimize  the  
picture quality. To do this, press Auto on the 
control panel of the projector or on the 
remote control. Within 3 seconds,...

Operation 22
Blank
In order to draw the audience’s full atten-
tion to the presenter, you can use Blank to 
hide the screen image. Press Blank again to 
restore the image. A word “BLANK” appear 
at the bottom right corner of the screen 
when the image is hidden.   
Zoom / Focusing
Adjust the projected image to your desired size 
using the lens’ zoom ring. Then focus the image by 
rotating the focus ring. Refer to the screen size table 
on page 16. 
Laser Pointer Operation
The Laser Pointer is a...

Operation 23
Mouse Function Operation
Connect the projector to your PC or notebook 
with a USB cable prior to using these functions. 
The Mouse Pad  can take over the PC or notebook 
mouse function. When the displayed image is mag-
nified, use the  Mouse Pad to move around the dis-
play areas.
The L-Click and R-Click act as the Left (L) and 
Right (R) buttons of a computer mouse.
The Drag toggles between ON and OFF for the 
drag function of the remote mouse. 
Zoom In + / Zoom Out -
By pressing  Zoom +,...

Operation 24
Freeze
The image is frozen when Freeze is pressed. An icon   will 
appear in the lower right corner of the screen. To release the 
function, press Freeze again, Return or Source (this will 
change the input source and release the pause function).
Preset Mode Selection
Press Preset to select a operation mode that suits your need. 
There are several operation modes available for different 
types of signals.
Refer to page 34 for more information.
PC / DVI Signal Input
Presentation Vivid Video...