BenQ Sp830/sp831 Digital Projector User Manual

							Positioning your projector 21
When the screen aspect ratio is 4:3 and the projected picture is 16:9 or 15:9
Table B1: The screen aspect ratio is 4:3 and the projected picture is 16:9
D
A
D
B C
Maximum zoom Minimum zoom
Projection distanceCenter of lens Screen
Offset
Floor Installation
D
A
D
B C
Maximum zoom
Minimum zoomProjection distance
Center of lens
Screen Offset
Ceiling Installation
Screen DimensionsProjected 
picture sizeBlack 
bar (D)Distance from Screen in 
mmVe r t i c a l  
Offset
DiagonalHeight 
CWidth 
BHeight 
AWidth 
BMin
(Max 
zoom)Av e r a g eMax
(Min 
zoom)
FeetInchesmmcmcmcmcmcmmm
2.5 30 762 46 61 34 61 5.7 956.9 1033.4 1110.0 48 
4.2 50 1270 76 102 57 102 9.5 1594.8 1722.4 1850.0 80 
6.7 80 2032 122 163 91 163 15.2 2551.7 2755.8 2959.9 128 
8.3 100 2540 152 203 114 203 19.1 3189.6 3444.7 3699.9 160 
10.0 120 3048 183 244 137 244 22.9 3827.5 4133.7 4439.9 192 
12.5 150 3810 229 305 171 305 28.6 4784.4 5167.1 5549.9 240 
15.0 180 4572 274 366 206 366 34.3 5741.2 6200.5 6659.8 288 
16.7 200 5080 305 406 229 406 38.1 6379.2 6889.5 7399.8 320 
18.3 220 5588 335 447 251 447 41.9 7017.1 7578.4 8139.8 352 
20.0 240 6096 366 488 274 488 45.7 7655.0 8267.4 8879.8 384  
						

							22 Positioning your projectorTable B2: The screen aspect ratio is 4:3 and the projected picture is 15:9
There is 3% tolerance among these numbers in Table A, Table B1, and Table B2 due to optical 
component variations. 
BenQ recommends that if you intend to permanently install the projector, you should 
physically test the projection size and distance using the actual projector in situ before you 
permanently install it, so as to make allowance for this projectors optical characteristics. This 
will help you determine the exact mounting position so that it best suits your installation 
location.
If you place the projector in a different position (to that recommended), you will have to tilt 
it down or up, or even turn it slightly left or right to center the picture on the screen. In these 
situations, some picture distortion will occur. To correct the distortion, see Correcting 
picture distortion on page 37 for details.
Screen DimensionsProjected 
picture sizeBlack 
bar (D)Distance from Screen in 
mmVe r t i c a l  
Offset
DiagonalHeight 
CWidth 
BHeight 
AWidth 
BMin
(Max 
zoom)Av e r a g eMax
(Min 
zoom)
FeetInchesmmcmcmcmcmcmmm
2.5 30 762 46 61 37 61 4.6 956.9 1033.4 1110.0 37 
4.2 50 1270 76 102 61 102 7.6 1594.8 1722.4 1850.0 61 
6.7 80 2032 122 163 98 163 12.2 2551.7 2755.8 2959.9 98 
8.3 100 2540 152 203 122 203 15.2 3189.6 3444.7 3699.9 122 
10.0 120 3048 183 244 146 244 18.3 3827.5 4133.7 4439.9 146 
12.5 150 3810 229 305 183 305 22.9 4784.4 5167.1 5549.9 183 
15.0 180 4572 274 366 219 366 27.4 5741.2 6200.5 6659.8 219 
16.7 200 5080 305 406 244 406 30.5 6379.2 6889.5 7399.8 244 
18.3 220 5588 335 447 268 447 33.5 7017.1 7578.4 8139.8 268 
20.0 240 6096 366 488 293 488 36.6 7655.0 8267.4 8879.8 293  
						

							Connection 23
4. Connection
When connecting a signal source to the projector, be sure to:
1. Turn all equipment off before making any connections.
2. Use the correct signal cables for each source.
3. Ensure the cables are firmly inserted. 
In the connections shown below, some cables may not be included with the projector (see 
Shipping contents on page 10). They are commercially available from electronics stores.
Connecting a computer
The projector provides VGA and DVI input sockets that allow you to connect it to both 
IBM® compatibles and Macintosh® computers. A Mac adapter (an optional accessory) is 
needed if you are connecting legacy version Macintosh computers.
To connect the projector to a notebook or desktop computer (either through a VGA 
cable or VGA to DVI-A cable): 
The final connection path should be like that shown in the following diagram:
Many notebooks do not turn on their external video ports when connected to a projector. 
Usually a key combo like FN + F3 or CRT/LCD key turns the external display on/off. Locate a 
function key labeled CRT/LCD or a function key with a monitor symbol on the notebook. Press 
FN and the labeled function key simultaneously. Refer to your notebooks documentation to 
find your notebooks key combination.
•With a VGA cable: •With a VGA to DVI-A cable:
1. Take the supplied VGA cable and 
connect one end to the D-Sub output 
socket of the computer.
2. Connect the other end of the VGA 
cable to the D-SUB IN signal input 
socket on the projector. 1. Take a VGA to DVI-A cable and 
connect the VGA end to the D-Sub 
output socket of the computer.
2. Connect the DVI end of the VGA to 
DVI-A cable to the DVI-I signal input 
socket on the projector. 
3. If you wish to use the remote paging function (see Remote paging operations on 
page 56), take a USB cable and connect the larger end to the USB port of the 
computer, and the smaller end to the USB socket on the projector.
Notebook or desktop computer
i. USB cable
ii. VGA to DVI-A cable
iii. VGA cableiiiiii 
						

							24 Connection
Connecting a monitor
If you want to view your presentation close-up on a monitor as well as on the screen, you 
can connect the projector to an external monitor by following the instructions below.
To connect the projector to a monitor (either through a VGA cable or VGA to 
DVI-A cable):
The final connection path should be like that shown in the following diagram: • With a VGA cable: • With a VGA to DVI-A cable:
Note: Your monitor must be equipped with a 
DVI input socket.
1. Connect the projector to a computer as described in Connecting a computer on 
page 23.
The D-SUB OUT output only works when an appropriate D-Sub input is made to the 
projector. Be sure the projector is connecting with the computer using the D-SUB IN 
socket, not the DVI-I socket.
2. Take a suitable VGA cable (only one 
supplied) and connect one end of the 
cable to the D-Sub input socket of the 
video monitor.
3. Connect the other end of the cable to 
the D-SUB OUT socket on the 
projector.2. Take a VGA to DVI-A cable and 
connect the DVI end of the cable to the 
DVI input socket of the video monitor.
3. Connect the VGA end of the cable to 
the D-SUB OUT socket on the 
projector.
Notebook or 
desktop 
computer
(VGA) (DVI)
iiiiii
i. VGA cable
ii. VGA to DVI-A cable
iii. VGA cable 
						

							Connection 25
Connecting Video source devices
This section describes how to connect the projector to Video source devices using video 
cables. Video cable connections are recommended for Video presentations. 
You can connect your projector to various Video source devices that provide any one of the 
following output sockets:
•DVI
•Component Video
•S-Video
•Video (composite)
The method you choose will most likely depend upon the availability of matching terminals 
on both the projector and the Video source device as described below:
Best video quality
The best available video connection method is DVI. If your source device is equipped with a 
DVI socket, based on the type of DVI connector you have, you can enjoy digital or high-end 
analog video quality.
See Connecting a DVI source device on page 26 for how to connect the projector to a DVI 
source device and other details.
If no DVI source is available, the next best video signal is Component Video (not to be 
confused with composite Video). Digital TV tuners and DVD players output Component 
Video natively, so if available on your devices, they should be your connection method of 
choice in preference to S-Video or (composite) Video.
See Connecting a Component Video source device on page 27 for how to connect the 
projector to a component video device.
Better video quality
The S-Video method provides a better quality analog video than standard composite Video. 
If you have both composite Video and S-Video output terminals on your Video source 
device, you should select to use the S-Video option.
See Connecting an S-Video or a composite Video source device on page 28 for how to 
connect the projector to an S-Video device.
Least video quality
Composite Video is an analog video and will result in a perfectly acceptable, but less than 
optimal result from your projector, being the least video quality of the available methods 
described here.
See Connecting an S-Video or a composite Video source device on page 28 for how to 
connect the projector to a composite Video device. 
						

							26 Connection
Connecting a DVI source device
The projector provides a DVI-I input socket that allows you to connect it to a DVI source 
device like a DVD player, or a VGA output device like a notebook or desktop computer.
There are three types of DVI connectors: DVI-A, DVI-D, and DVI-I. The DVI-I socket is an 
integrated connector which supports both formats: DVI-A, and DVI-D. 
DVI-A format is used to carry a DVI signal to an analog (VGA) display, or vice-versa. 
Although some signal quality is lost from the signal conversion, it still transmits higher 
picture quality than a standard VGA connection. 
DVI-D format is used to directly carry a digital signal to a digital display without signal 
conversion. The pure digital connection provides faster and higher picture quality than an 
analog connection, due to the nature of the digital format. 
DVI-A and DVI-D formats are non-interchangeable. You cannot connect a DVI-A format 
connector to DVI-D equipment and visa-versa. Make sure you know which kind of format 
your equipment is fitted with before you purchase any cables. Or you can purchase a DVI-I 
cable which will be more useful in any type of DVI connection situation.
Examine your source device to determine if it has an unused DVI or VGA (D-Sub) output 
socket available: 
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to the device.
To connect the projector to a DVI source device or a computer:
For information on connecting a DVI source device to a computer through a VGA to DVI-A 
cable, see Connecting a computer on page 23. 
1. Take the DVI (DVI-D or DVI-I) cable and connect one end to the DVI output socket 
of the DVI source device.
2. Connect the other end of the cable to the DVI-I signal input socket on the projector. 
The final connection path should be like that shown in the following diagram:
i. DVI-D or DVI-I 
cable
AV  d e v i c e
i 
						

							Connection 27
Connecting a Component Video source device
Examine your Video source device to determine if it has a set of unused Component Video 
output sockets available: 
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to the device.
To connect the projector to a Component Video source device through a 
Component Video cable:
1. Take a Component Video cable and connect one end to the Component Video output 
sockets of the Video source device. Match the color of the plugs to the color of the 
sockets; green to green, blue to blue; and red to red.
2. Connect the other end of the Component Video cable to the COMPONENT sockets 
(Y, Pb/Cb, Pr/Cr) on the projector. Match the color of the plugs to the color of the 
sockets; green to green, blue to blue; and red to red.
The final connection path should be like that shown in the following diagram:
• Component Video is the only video input that delivers native 16:9 aspect ratio picture.
• If the selected video picture is not displayed after the projector is turned on and the 
correct video source has been selected, check that the Video source device is turned on 
and operating correctly. Also check that the signal cables have been connected correctly.
AV device
i. Component cablei 
						

							28 Connection
Connecting an S-Video or a composite Video source device
Examine your Video source device to determine if it has an unused S-Video or Video output 
socket available: 
• If it has both sockets, use the S-Video output socket for connection as the S-Video 
termial provides better picture quality than the Video terminal. See Connecting Video 
source devices on page 25 for details.
• If it has either of the output socket, you can also continue with this procedure.
• If not, you will need to reassess which method you can use to connect to the device.
If you have already made a Component Video connection between the projector and the video 
source device, you need not connect to this device again using an S-Video or composite 
Video connection as this makes an unnecessary second connection of poorer picture quality. 
You need only connect using a composite Video connection if both Component Video and S-
Video are not supplied on the video source device (for example, with some analog video 
cameras).
To connect the projector to an S-Video/Video source device:
1. Take an S-Video cable/Video cable and connect one end to the S-Video/Video output 
socket of the Video source device.
2. Connect the other end of the S-Video cable/Video cable to the S-VIDEO/VIDEO 
socket on the projector.
The final connection path should be like that shown in the following diagram:
• If the selected video picture is not displayed after the projector is turned on and the 
correct video source has been selected, check that the Video source device is turned on 
and operating correctly. Also check that the signal cables have been connected correctly.
AV device
i. Video cable
ii. S-Video cable
iiior 
						

							Connection 29
Connecting Audio device
The projector has built-in speakers which are designed to provide basic audio functionality 
accompanying data presentations for business purposes only. It is not designed for, nor 
intended for audio reproduction use as might be expected in home theater or home cinema 
applications.
If you wish, you can make use of the projector speakers in your presentations, and also 
connect separate amplified speakers to the AU D I O  O U T  ( L / R ) sockets of the projector.
If you have a separate sound system, you will most likely want to connect the audio output 
of your Video source device to that sound system, instead of to the projector. 
The audio connections illustrated in the following diagram is provided for informational 
purposes only. You need not connect audio to the projector if there is an alternate sound 
system available, or if audio is not required.
1. If you wish to make use of the projector speakers in your presentations, take a suitable 
audio cable and connect one end of the cable to the audio output socket on the 
computer or video device, and the other end to the audio socket(s) corresponding to 
the connected signal socket of the projector.
Which audio cable you use depends on what device you have.
If you have a computer or DVI device connected to the D-SUB IN, DVI-I or RJ-45 
socket, use a stereo mini-jack cable.
If you have a video device connected to the COMPONENT, VIDEO, or S-VIDEO 
socket(s), use a RCA-style cable.
2. If you wish to connect separate amplified speakers, you can use another suitable audio 
cable and connect the end with 2 RCA type connectors to the AUDIO OUT (L/R) 
sockets of the projector, and the other end to your external speakers (not supplied). 
Match the color of the plugs to the color of the sockets; white to white, and red to red.
The AUDIO OUT (L/R) outputs work when any of audio input is made to the 
projector.
Once connected, the audio can be controlled by the remote control (MUTE, AU D I O) 
or projector On-Screen Display (OSD) menus. See Adjusting the sound on page 55 
for details.
Speakers AV deviceNotebook or 
desktop compute
r
or or or or oror 
						

							30 Operation
5. Operation
Starting up the projector
1. Plug the power cord into the projector and into a wall 
socket. Turn on the wall socket switch (where fitted).
2. Press the main power switch to the I position.
Check that the Power indicator on the projector lights 
orange after power has been applied.
3. Remove the lens cap. 
If it is left on, it could become deformed due to the 
heat produced by the projection lamp.
4. Press and hold (for 2 seconds)   on the projector or 
remote control to start the projector. 
The Power indicator light flashes green and stays green 
when the projector is on.
The start up procedure takes about 30 seconds after 
pressing  . In the later stage of start up, a default 
BenQ logo is projected.
(If necessary) Rotate the focus ring to adjust the 
picture clearness.
If the projector is still hot from 
previous activity, it will run 
the cooling fans for 
approximately 90 seconds 
before energizing the lamp. 
5. If you are prompted for a password, press the arrow 
keys to enter a six digit password.See Utilizing the password 
function on page 32 for 
details.
6. Switch all of the connected equipment on.
The projector will start to search for input sources. 
The current input source being scanned displays in the 
lower right corner of the screen. If the projector 
doesnt detect a valid signal, the searching message will 
continue displaying until an input source signal is 
found.
You can also press SOURCE on the projector or 
remote control to display the signal selection bar and 
switch between different signals. See Switching input 
source on page 35 for details.If the frequency/resolution of 
the input source exceeds the 
projectors operating range, 
you will see the message Out 
of Range displayed on a 
blank screen. Please change 
to an input source which is 
compatible with the 
projectors resolution or set 
the input source to a lower 
setting. See Timing chart on 
page 77 for details.
II
II