BenQ Cp120 Dlp Users Manual

							Positioning your projector 13 signal) will display in a 4:3 aspect ratio (and will require an additional 33% display height 
than that of the scaled 16:9 aspect image projection area).
IMPORTANT: Do not select a permanent projector position based upon a 16:9 projection if you 
will ever need to select an input other than composite Video being fed a 16:9 aspect signal.
The projector should always be placed horizontally level (like flat on a table), and positioned 
directly perpendicular (90° right-angle square) to the horizontal centre of the screen. This 
prevents image distortion caused by angled projections (or projecting onto angled surfaces).
The modern digital projector does not project directly forward (like older style reel-to-reel 
film projectors did). Instead, digital projectors are designed to project at a slightly upward 
angle above the horizontal plane of the projector. This is so that they can be readily placed 
on a table and will project forward and upwards onto a screen positioned so that the bottom 
edge of the screen is above the level of the table (and everyone in the room can see the 
screen).
You can see from the diagram on page 15, that this type of projection causes the bottom edge 
of the projected image to be vertically offset from the horizontal plane of the projector. If the 
projector is positioned further away from the screen, the projected image size increases, and 
the vertical offset also increases proportionately.
When determining the position of the screen and projector, you will need to account for 
both the projected image size and the vertical offset dimension, which are directly 
proportional to the projection distance.
BenQ has provided a table of 4:3-aspect-ratio screen sizes (see Screen size chart on page 
15) to assist you in determining the ideal location for your projector. There are two 
dimensions to consider, the perpendicular horizontal distance from the centre of the screen 
(projection distance), and the vertical offset height of the projector from the horizontal edge 
of the screen (offset).
How to determine the position of the projector for a given
screen size
1. Select your screen size.
2. Refer to the table on page 15 and find the closest match to your screen size in the left 
columns labelled 4:3 Screen Diagonal and 4:3 Aspect in mm. Using this value, look 
across this row to the right to find the corresponding average distance from screen 
value in the column labelled Average. This is the projection distance.
3. On that same row, look across to the right column and make note of the vertical Offset 
value. This will determine the final vertical offset placement of the projector in 
relation to the edge of the screen.
4. The recommended position for the projector is aligned perpendicular to the 
horizontal centre of the screen, at the distance from the screen determined in step 2 
above, and offset by the value determined in step 3 above.
For example, if you are using a 120-inch screen, the average projection distance is 4757 mm 
and with a vertical offset of 229 mm.
If you place the projector in a different position (to that recommended), you will have to tilt 
it down or up to center the image on the screen. In these situations, some image distortion 
will occur. Use the Keystone function to correct the distortion. See Correcting keystone on 
page 25 for keystone correction.
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							Positioning your projector 14
How to determine the recommended screen size for a
given distance
This method can be used for situations where you have purchased this projector and would 
like to know what screen size will fit in your room. The maximum screen size is limited by 
the physical space available in your room.
1. Measure the distance between the projector and where you want to position the 
screen. This is the projection distance.
2. Refer to the table on page 15 and find the closest match to your measurement in the 
average distance from screen column labelled Average. Check that your measured 
distance is between the min and max distances listed on either side of the average 
distance value.
3. Using this value, look across that row to the left to find the corresponding screen 
diameter listed in that row. That is the projected image size of the projector at that 
projection distance.
4. On that same row, look across to the right column and make note of the vertical Offset 
value. This will determine the final placement of the screen in relation to the 
horizontal plane of the projector.
For example, if your measured projection distance was 4.5m (4500mm), the closest match in 
the Average column is 4682mm. Looking across this row shows that a 3000mm (3m) screen 
is required. If you can only obtain imperial sized screens, the listed screen sizes on either side 
of the 3m screen are the 9 and 10 screens. 
Checking the min and max projection distance values for the these (9 & 10) sizes, indicates 
that the 4.5m measured projection distance will fit these screens too. The projector can be 
adjusted (using the zoom control) to display on these different screen sizes at that projection 
distance. Be aware that these different screens have different vertical offset values.
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							Positioning your projector 15
Screen size chart
There is 3% ~ 5% tolerance among these numbers due to optical component variations.
4:3 Screen Diagonal4:3 Aspect in mmDistance from Screen in mmVertic al 
Offset in 
mm
FeetInchesmmWidthHeight
Min length 
(with max. 
zoom)
Average 
Max length 
(with min. 
zoom)
4 48 1219 975 732 1752 1903 2054 91
1500 1200 900 2155 2341 2527 113
5 60 1524 1219 914 2190 2379 2568 114
6 72 1829 1463 1097 2628 2854 3081 137
2000 1600 1200 2874 3122 3370 150
7 84 2134 1707 1280 3066 3330 3595 160
8 96 2438 1951 1463 3503 3806 4109 183 
2500 2000 1500 3592 3902 4212 188
9 108 2743 2195 1646 3941 4282 4622 206
3000 2400 1800 4310 4682 5054 225
10 120 3048 2438 1829 4379 4757 5135 229
3500 2800 2100 5029 5463 5897 263
12 144 3658 2926 2195 5256 5709 6163 274
4000 3200 2400 5747 6243 6739 300
15 180 4572 3658 2743 6569 7136 7703 343
5000 4000 3000 7184 7804 8424 375
18 216 5486 4389 3292 7883 8563 9244 411
6000 4800 3600 8621 9365 10109 450
25 300 7620 6096 4572 10948 11893 12838 572
Maximum 
zoomMinimum 
zoom
Projection distanceCenter of lens Screen
Offset
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							Connection 16
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 6). They are commercially available from electronics stores.
• This projector has no speaker or built-in support for audio reproduction.
Connecting a computer
The projector provides a VGA input socket that allows you to connect it to a notebook or 
desktop computer.
Additionally, you can also connect the projector to a computer via the USB cable so you can 
perform paging operations of the application on the PC or notebook. (see Remote paging 
operations on page 27).
The projector can also be connected to a computer via wireless connection. See Using the 
wireless functions on page 28 for details.
To connect the projector to a notebook or desktop computer:
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/COMP IN signal input socket 
on the projector.
3. If you wish to use the remote paging function (see Remote paging operations on 
page 27), take the supplied 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.
The final connection path should be like that shown in the following diagram:
• A Mac adapter (an optional accessory) is needed if you are connecting legacy version 
(www.apple.com/usen/legacy/legacy_list.html) Macintosh computers. 
• Many notebook computers 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 computer. Press FN and the labeled function key simultaneously. Refer to your 
notebook computer’s documentation to find your notebook computer’s key combination.
• For information about how to connect the projector to a computer wirelessly, refer to Using 
the wireless functions on page 28.
USB cable
VGA cable
Notebook or desktop computer
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							Connection 17
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.
This projector also supports data (graphic) PC connection using wireless local area network 
(WLAN) connection. WLAN connection is not recommended for Video presentations. 
SeeUsing the wireless functions on page 28.
You can connect your projector to various Video source devices that provide any one of the 
following output sockets:
•Component Video
•S-Video
•Video (composite)
You need only connect the projector to a Video source device using just one of the above 
connecting methods, however each provides a different level of video quality. 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 Component Video (not to be confused with 
composite Video). Digital TV tuner and DVD players output Component Video natively, so 
if available on your devices, this should be your connection method of choice in preference 
to (composite) Video.
See Connecting a Component Video source device on page 18 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 elect to use the S-Video option.
See Connecting an S-Video source device on page 19 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 a composite Video source device on page 20 for how to connect the 
projector to a composite Video device.
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							Connection 18
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
1. Take the (optional accessory) Component Video to VGA (D-Sub) adaptor cable and 
connect the end with 3 RCA type connectors 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 to VGA (D-Sub) adaptor cable (with 
a D-Sub type connector) to the D-SUB/COMP IN socket on the projector.
The final connection path should be like that shown in the following diagram:
Component Video is the only video output that delivers native 16:9 aspect ratio picture.
If you connect the projector to a High Definition TV (HDTV) tuner, the following standards 
are supported:
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 device is turned on and 
operating correctly. Also check that the signal cables have been connected correctly.
• 480i • 480p
• 576i • 576p
• 720p (50/ 60 Hz) • 1080i (50/ 60 Hz)
A/V deviceComponent Video to VGA 
(D-Sub) adaptor cable 
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							Connection 19
Connecting an S-Video source device
Examine your Video source device to determine if it has an unused S-Video 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 an S-Video source device
1. Take an appropriate S-Video cable (not supplied) and connect one end to the S-Video 
output socket of the Video source device.
2. Connect the other end of the S-Video cable to the S-VIDEO socket on the projector.
The final connection path should be like that shown in the following diagram:
• 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 device is turned on and 
operating correctly. Also check that the signal cables have been connected correctly.
• If you have already made a Component Video connection between the projector and this S-
Video source device using Component Video connections, you need not connect to this 
device using an S-Video connection as this makes an unnecessary second connection of 
poorer picture quality. See Connecting Video source devices on page 17 for details.
A/V deviceS-Video cable 
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							Connection 20
Connecting a composite Video source device
Examine your Video source device to determine if it has a set of unused composite 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 an composite Video source device
1. Take an appropriate Video cable (not supplied) and connect one end to the composite 
Video output socket of the Video source device.
2. Connect the other end of the Video cable to the VIDEO socket on the projector.
The final connection path should be like that shown in the following diagram:
• 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 device is turned on and 
operating correctly. Also check that the signal cables have been connected correctly.
• You need only connect to this device using a composite Video connection if Component 
Video and S-Video inputs are unavailable for use. See Connecting Video source devices on 
page 17 for details.
A/V deviceVideo cable 
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							Using the projector 21
Using the projector
Start up
If the projector is still hot from previous activity, it will run the cooling fan for approximately 90 
seconds before energising the lamp.
4. If you are prompted for a password, press the arrow buttons to select the four 
password digits, then press the Auto (or AU TO / C H .) button. For information about 
the password function, refer to Utilizing the password function on page 22.
5. Switch all of the connected equipment on.
6. The current input source being scanned displays in the upper part of a dialog on the 
screen. The scan will continue until signal from the input source is detected.
If the Auto Off function (See Auto Off (Off) on page 43 for details) is activated, the projector 
will turn off automatically if no input signal is detected from the selected source after the 
period of time as set by the Auto Off function.
1. Plug the power cord into the projector and 
into a wall socket. Turn on the wall socket 
switch (where fitted). Check that the 
POWER indicator on the projector lights 
orange after power has been applied.
2. Slide open the lens cover. If it is left closed, 
it could become deformed due to heat.
3. Press and hold (for 2 seconds) the POWER 
button on the remote control or projector 
to start the unit. The POWER indicator 
light flashes green and stays green when the 
unit is on.
The start up procedure takes about 30 
seconds after pressing the POWER button 
In the later stage of start up, a default BenQ 
logo is projected.
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							Using the projector 22The projector will also display its name, current wireless connection mode and 
channel in the lower part of the dialog. The default wireless connection mode is 
802.11 b/g. The projector name is used to identify which projector to connect when 
you have multiple projectors available in the same location.
If a wireless connection is detected, the Wireless Connection menu will display 
automatically.
• For more information about wireless connection modes, channels and how to establish 
wireless connection between the projector and computer, please refer to Using the wireless 
functions on page 28.
• The 802.11 a mode may not be available on the projectors sold in certain countries/areas due 
to local regulations.
You can also press the Source (or SOURCE/WIRELESS) button to select your desired 
input signal manually. For more information, please refer to Switching input signal 
on page 26.
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. This message will remain 
on-screen until you change the input signal to an appropriate source.
Utilizing the password function
For security purposes and to help prevent unauthorized use, the projector includes an 
option for setting up password security. The password can be set through the on-screen 
menu. For details of the on-screen menu operation, please refer to Using the menus on 
page 37 for information.
WARNING: You will be inconvenienced if you activate the password functionality and 
subsequently forget the password. Print out this manual and write the password you used in 
this manual, and keep the manual in a safe place for later recall.
To set a password
CAUTION: Once a password has been set, the projector cannot be used unless the correct 
password is entered every time the projector is started.
1. Open the on-screen menu and go to  Setting > Password. Select On by pressing 
the 3 or 4buttons.
• The password will display on-screen when being input.
• IMPORTANT: Write your selected password down here in this manual so that it is 
available to you should you ever forget it.
Password: __ __ __ __
Keep this manual in a safe place.
2. When the function is activated for the first time, 
a prompt will display on the screen. Use the 5 
or 6 button to select a number for each digit of 
the password. Use the 3 or 4 button to move 
between the digits of the password.
3. When all digits are entered and the 
password is ready, press the Auto (or 
AU TO / C H .) button to confirm. A 
confirmation message displays.Password Setup
Enter Password  
Press Auto to Confirm
Press 5 or 6 to change number
Press 3 or 4to move
0000
Password Setup
Do you want to use 0 0 0 0 as your password?
Yes  Auto       No 5       Cancel 6
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