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 to an external monitor with a VGA 
cable or D-Sub - DVI cable.
S-Video
S-Video cable
S-Video devices
S-Video
Audio cable
Video devices or VCR
Video cable
Audio cable
VGA cable or D-Sub - DVI 
cable 
						

							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 Display menu, on the projec-
tor control panel or on the remote control.
Screen Size
Place the projector at the required distance from the screen according to the required picture 
size (see the table on the next page).
 
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Zoom 
ring Focus ring 
						

							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 0.93 93.3 1.14 114.3
8 96 4.98 59.7 6.10 73.2 2 200 1.24 124.5 1.52 152.4
10 120 6.22 74.7 7.62 91.4 2.5 250 1.56 155.6 1.91 190.5
12 144 7.47 89.6 9.14 109.7 3 300 1.87 186.7 2.29 228.6
14 168 8.71 104.5 10.67 128.0 3.5 350 2.18 217.8 2.67 266.7
16 192 9.96 119.5 12.19 146.3 4 400 2.49 248.9 3.05 304.8
18 216 11.20 134.4 13.72 164.6 4.5 450 2.80 280.0 3.43 342.9
20 240 12.45 149.4 15.24 182.9 5 500 3.11 311.2 3.81 381.0
22 264 13.69 164.3 16.76 201.2 5.5 550 3.42 342.3 4.19 419.1
24 288 14.94 179.2 18.29 219.5 6 600 3.73 373.4 4.57 457.2
26 312 16.18 194.2 19.81 237.7 6.5 650 4.04 404.5 4.95 495.3
28 336 17.42 209.1 21.34 256.0 7 700 4.36 435.6 5.33 533.4
30 360 18.67 224.0 22.86 274.3 7.5 750 4.67 466.7 5.72 571.5
32 384 19.91 239.0 24.38 292.6 8 800 4.98 497.8 6.10 609.6
PB8250 (XGA) screen size chart (16:9 aspect ratio)
Distance
from
screenDiagonal measure-
mentDistance
from screenDiagonal measurement
Minimum
zoomMaximum
zoomMinimum
zoomMaximum
zoom
feet inch feet inch feet inch meter cm meter cm meter cm
4 48 2.29 27.5 2.80 33.6 1 100 0.57 57.4 0.70 70.0
6 72 3.44 41.3 4.20 50.4 1.5 150 0.86 86.0 1.05 105.0
8 96 4.59 55.1 5.60 67.2 2 200 1.15 114.7 1.40 140.0
10 120 5.74 68.8 7.00 84.0 2.5 250 1.43 143.4 1.75 179.4
12 144 6.88 82.6 8.40 100.8 3 300 1.72 172.1 2.10 209.9
14 168 8.03 96.4 9.80 117.6 3.5 350 2.01 200.8 2.45 244.9
16 192 9.18 110.1 11.20 134.4 4 400 2.29 229.4 2.80 279.9
18 216 10.32 123.9 12.60 151.2 4.5 450 2.58 258.1 3.15 314.9
20 240 11.47 137.7 14.00 167.9 5 500 2.87 286.8 3.50 349.9
22 264 12.62 151.4 15.39 184.7 5.5 550 3.15 315.5 3.85 384.9
24 288 13.77 165.2 16.79 201.5 6 600 3.44 344.1 4.20 419.9
26 312 14.91 179.0 18.19 218.3 6.5 650 3.37 372.8 4.55 454.9
28 336 16.06 192.7 19.59 235.1 7 700 4.02 401.5 4.90 489.8
30 360 17.21 206.5 20.99 251.9 7.5 750 4.30 430.2 5.25 524.8
32 384 18.35 220.3 22.39 268.7 8 800 4.59 458.9 5.60 559.8 
						

							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 start up, a default BenQ logo appears. 
7. Next, the projector starts to search input signals. Irrespective of selected input source, 
the screen shows “Acquiring Signal” at the bottom right corner of the screen. If 
there is no input source detected, one of six messages will be displayed on the screen  
						

							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 warning mes-
sage appears. To turn the projec-
tor off, press Power again.
2. The Power indicator light flashes 
orange and the lamp shuts down, 
the fans continue to run for 
approximately 90 seconds to cool 
down the projector.
To protect the lamp, the projector will
not respond to any commands during
the cooling process.
3. Turn the main power switch off. 
4. Disconnect the power cord from the wall socket.
Do not unplug the power cord before the projector shutdown sequence is complete or during
the 90-second cooling down process.
If the projector is not properly shut down, to protect the lamp, when you attempt to re-start the
projector within hours, the fans will run for a few minutes to cool down. Press Power again to
start the projector after the fans stop. 
						

							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 
keystoning at the top of the image. 
Press 3 Left to correct keystoning 
at the bottom of the image.
2. Press 3 Ke ystone/ Ke ystone 4  
on the remote control to display the 
status bar labelled Keystone. Press 
Ke ystone 4 to correct keystoning 
at the top of the image. Press 3 
Ke ystone to correct keystoning at 
the bottom of the image. 
3. Press Menu key on the projector or the remote control. Go to 
 Display --> Ke ystone 
and adjust the values by pressing 3 Left/ Right 4 on the projector or 3 Ke ystone/ Key-
stone 4 on the remote control.
For example, 
0Keystone-16Keystone
0Keystone+16Keystone
1. Press Right 4 on the projector or
2. Press Keystone
 4on the remote control
or
3. Press 
4 Right on the projector or
Keystone4 on the remote control when you
are in Display --> Keystone menu.
1. Press 
3 Left on the projector or
2. Press 
3 Keystone on the remote control
or
3. Press 3 Left on the projector or 3 Key-
stone on the remote control when you are in
Picture --> Keystone menu. 
						

							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, the built-
in Intelligent Auto Adjustment function will 
re-adjust the values of Frequency and Clock 
to provide the best picture quality. 
The current source information will be dis-
played at the bottom right of the screen for 
3 seconds, as below. 
The screen will be blank while Auto is functioning.
     Analog RGB
 1280 x 854 / 60Hz
 Presentation Mode 
						

							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 presentation aid for professionals. It 
emits red colored light when you press it and the LED indica-
tor lights up green. Do not look into the laser light window or 
shine the laser light beam on yourself or others. Refer to the 
warning messages on the back of the remote control and the 
attached “User Information” prior to using it.
                 BLANK
Zoom 
ring Focus ring 
						

							
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 +, the center of the picture will be magnified. 
When the  + button is pressed again, the picture is further magni-
fied. Use the Mouse Pad to navigate the image. By pressing  Zoom -
, the size of the image is reduced. When the  - button is pressed 
again, the picture is further reduced until it is restored to the origi-
nal size. You can also restore the actual image size by pressing 
Return .
Volume Adjustment
Adjust the loudness by pressing  Vo l u m e  +  /  - . Or press Mute to 
mute the sound. 
PIP (Picture In Picture) Operation
By pressing the PIP-Source, PIP-Pos and PIP-Size hot 
keys, you can enable the PIP (Picture In Picture) 
function and choose the posi tion and size of the PIP 
image.
Refer to page  35 for more information. 
						

							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 Economic
YPbPr / S-Video / Video Signal Input
Gaming Video Cinema Economic