BenQ Mp721c Users Manual

							Introduction 7
Projector exterior view
Front/upper side
Rear side
See Connection on page 17 for details. 
Lower/side view
1. External control panel 
(See Projector on page 8 for 
details.)
2. Vent (heated air exhaust)
3. Projection lens
4. Quick-release button
5. Lens cap
6. Focus ring and Zoom ring
7. Front IR remote sensor
7
6
2
3
4
5
1
8. Rear adjuster foot
9. Kensington anti-theft lock slot
10. AC power cord inlet
11. Rear IR remote sensor
12. USB socket
13. RS232 control port
14. RGB signal output socket15. RGB (PC)/Component video (YPbPr/ 
YC b Cr )  s i g n a l  i n p u t  s o c ke t
16. DVI-I signal input socket
17. Video input socket
18. S-Video input socket
19. Audio socket
11121314 15161718
8 9 1019
20. Quick-release foot
21. Lamp cover
22. Speaker grill
23. Rear adjuster foot
20
21
22
23
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							Introduction 8
Controls and functions
Projector
1. Power (Refer to Start up on page 25 and Shutting down the projector on page 
36 for more information.)
Turns the projector on or off.
2. Blank/Q? (Refer to Hiding the image on page 32 and Utilizing FAQ function on 
page 36 for more information.)
Used to hide the screen image. You can press any key on the control panel to bring the 
image back.
To start FAQ function, press and hold for 3 seconds.
3. Mode (Refer to Selecting a picture mode on page 31 for more information.)
Sequentially selects a predefined picture setting available for each input.
When a wireless module is installed and the Wireless Connection menu is displayed, 
press this button to change among LAN, IEEE 802.11 a, and IEEE 802.11 b/g. (The 
wireless module is available through BenQ retailers.)
4. Source (Refer to Switching input signal on page 28 for more information.)
Sequentially selects the input signal RGB, Component Video, S-Video, Video or DVI-
I.
5. Auto (Refer to Auto-adjusting the image on page 29 for more information.)
Automatically determines the best picture timings for the selected input.
When a wireless module is installed, the Wireless Connection menu is displayed and 
the IEEE 802.11 a is selected, press this button to search for a reliable channel. (The 
wireless module is available through BenQ retailers.)
6. Lamp indicator light (Refer to Indicators on page 51 for more information.)
Indicates the status of the lamp. Lights up or flashes when the lamp has developed a 
problem.
7. Temperature warning light (Refer to Indicators on page 51 for more information.)
Flashes red if the projector’s temperature becomes too high.
13
14
7128
5
4
1
910
2
3
116
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							Introduction 9 8. Power indicator light (Refer to Indicators on page 51 for more information.)
Lights up or flashes when the projector is under operation.
9.3 Left 
10. Right 4(Refer to Correcting keystone on page 29 for more information.)
When the on-screen menu is not activated, #9 and #10 function as Ke ystone -/+ hot 
keys.
11.6Menu (Refer to Using the menus on page 38 for more information.)
Turns on the on-screen display control menu.
12.5Exit
Exits and saves the menu settings.
When the on-screen menu is activated, the #9 to #12 buttons are used as directional 
arrows to select the desired menu items and to make adjustments.
13. Focus ring (Refer to Fine-tuning the image size and clarity on page 29 for more 
information.)
Adjusts the focus of the projected image.
14. Zoom ring (Refer to Fine-tuning the image size and clarity on page 29 for more 
information.)
Adjusts the size of the image. Rotate clockwise to enlarge the image or rotate counter-
clockwise to reduce the image size.
Remote control
1. Power (Refer to Start up on page 25 and Shutting down the projector on page 
36 for more information.)
Turns the projector on or off.
2. Freeze
The image is frozen when Freeze is pressed. An icon   will display in the lower 
right corner of the screen. To release the function, press Freeze again.
3.5Up, 6 Down
1
2
3
4
5
3
67
8
9
10
11
12
13
14
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							Introduction 104.3Left, Right4
When the on-screen menu is activated, the 5Up, 6 Down, 3Left and 
Right4buttons are used as directional arrows to select the desired menu items and to 
make adjustments.
5. Menu (Refer to Using the menus on page 38 for more information.)
Displays or hides the On-Screen Display (OSD) menu system.
6. Keystone  (Refer to page Correcting keystone on page 29 for more 
information.)
Manually corrects distorted images resulting from an angled projection.
7. Timer On/Show (Refer to Setting the presentation timer on page 35 for more 
information.)
A multifunctional key that activates, displays or hides on-screen timer based on your 
own timer setting. 
8. LAN/Wireless (Refer to Wireless connection (optional) on page 17 for more 
information.)
When a wireless module is installed and the Wireless Connection menu is displayed, 
press this button to toggle between LAN or Wireless connection modes. (The wireless 
module is available through BenQ retailers.)
9. SWAP (Refer to Wireless connection (optional) on page 17 for more information.)
When a wireless module is installed and the Wireless Connection menu is displayed, 
press this button to change the wireless connection mode between IEEE 802.11 a and 
IEEE 802.11 b/g. (The wireless module is available through BenQ retailers.)
10. Timer Setup (Refer to Setting the presentation timer on page 35 for more 
information.)
Enters presentation timer setting directly.
11. Auto (Refer to Auto-adjusting the image on page 29 for more information.)
Automatically determines the best picture settings for the displayed image. 
12. Source (Refer to Switching input signal on page 28 for more information.)
Sequentially selects the input signal RGB, Component Video, S-Video, Video or DVI-
I.
13. Blank (Refer to Hiding the image on page 32 for more information.)
Used to hide the screen image. Press any key on the remote control to restore the 
image. 
14. Mode (Refer to Selecting a picture mode on page 31 for more information.)
Sequentially selects a predefined picture setting available for each input.
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							Introduction 11
Remote control effective range
Infra-Red (IR) remote control sensors are located on the front and the back of the projector. 
The remote control must be held at an angle within 30 degrees perpendicular to the 
projectors IR remote control sensors to function correctly. The distance between the remote 
control and the sensors should not exceed 6 meters (~ 20 feet).
Make sure that there are no obstacles between the remote control and the IR sensors on the 
projector that might obstruct the infra-red beam. 
Replacing the remote control battery
1. Pull out the battery holder.
Please follow the illustrated instructions. Push 
and hold the locking arm whilst pulling out the 
battery holder.
2. Insert the new battery in the holder. Note 
the positive polarity should face outward.
3. Push the holder into the remote control.
• Avoid excessive heat and humidity. 
• There may be battery damage if the battery 
is incorrectly replaced. 
• Replace only with the same or equivalent type recommended by the battery 
manufacturer.
• Dispose of the used battery according to the battery manufacturer’s instructions.
• Never throw a battery into a fire. There may be danger of an explosion. 
• If the battery is dead or if you will not be using the remote control for a long time, remove 
the battery to prevent damage to the remote control from possible battery leakage.
• Operating the projector from the 
front
Ap
p
r
ox. 
1
5
°
• Operating the projector from the 
rear
Appr
ox
. 
15°
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							Positioning your projector 12
Positioning your projector
Choosing a location
Your projector is designed to be installed in one of four possible installation locations: 
1. Table in front of screen; 
2. Ceiling in front of screen; 
3. Table at rear of screen;
4. Ceiling at rear of screen. 
Your room layout or personal preference will dictate which installation location you select. 
Take into consideration the size and position of your screen, the location of a suitable power 
outlet, as well as the location and distance between the projector and the rest of your 
equipment.
1. Front Table
Select this location with the projector placed near the 
floor in front of the screen. This is the most common 
way to position the projector for quick setup and 
portability.
2. Front Ceiling
Select this location with the projector suspended 
upside-down from the ceiling in front of the screen.
Purchase the BenQ Projector Ceiling Mounting Kit 
from your dealer to mount your projector on the 
ceiling.
Set  in the Advanced > Mirror menu after you 
turn the projector on.
3. Rear Table
Select this location with the projector placed near the 
floor behind the screen.
Note that a special rear projection screen is required.
Set  in the Advanced > Mirror menu after you 
turn the projector on.
4. Rear Ceiling
Select this location with the projector suspended 
upside-down from the ceiling behind the screen.
Note that a special rear projection screen and the 
BenQ Projector Ceiling Mounting Kit are required for 
this installation location.
Set  in the Advanced > Mirror menu after you 
turn the projector on.
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							Positioning your projector 13
Safety instructions for ceiling mounting of the
projector
We want you to have a pleasant experience using your BenQ projector, so we need to bring 
this safety matter to your attention to prevent possible damage to person and property.
If you intend to mount your projector on the ceiling, we strongly recommend that you use a 
proper fitting BenQ projector ceiling mount kit and that you ensure it is securely and safely 
installed.
If you use a non-BenQ brand projector ceiling mount kit, there is a safety risk that the 
projector may fall from the ceiling due to an improper attachment through the use of the 
wrong gauge or length screws.
You can purchase a BenQ projector ceiling mount kit from the place you purchased your 
BenQ projector. BenQ recommends that you also purchase a separate Kensington lock 
compatible security cable and attach it securely to both the Kensington lock slot on the 
projector and the base of the ceiling mount bracket. This will perform the secondary role of 
restraining the projector should its attachment to the mounting bracket become loose.
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							Positioning your projector 14
Obtaining a preferred projected image size
The distance from the projector lens to the screen, the zoom setting, and the video format 
each factors in the projected image size.
The native resolution of the projector is 1024 x 768 pixels, which is a 4 to 3 aspect ratio 
(expressed as 4:3). To be able to project a complete 16:9 (widescreen) aspect ratio image, the 
projector can resize and scale a widescreen image to the projectors native aspect width. This 
will result in a proportionally smaller height equivalent to 75% of the projectors native 
aspect height.
Thus, a 16:9 aspect image will not utilize 25% of the height of a 4:3 aspect image displayed 
by this projector. This will be seen as darkened (unlit) bars along the top and bottom 
(vertical 12.5% height respectively) of the 4:3 projection display area whenever displaying a 
scaled 16:9 aspect image in the vertical center of the 4:3 projection display area.
When determining the position of your projector, you should consider its intended use and 
input signal aspect ratios. All inputs (other than composite Video being fed a 16:9 aspect 
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 center 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).
If the projector is mounted on a ceiling, it must be mounted upside-down so that it projects 
at a slightly downward angle. 
You can see from the diagram on page 16, that this type of projection causes the bottom edge 
of the projected image to be vertically offset from the horizontal plane of the projector. 
When ceiling mounted, this refers to the top edge of the projected image.
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 to assist you in determining the 
ideal location for your projector. There are two dimensions to consider, the perpendicular 
horizontal distance from the center of the screen (projection distance), and the vertical 
offset height of the projector from the horizontal edge of the screen (offset).4:3 aspect image in a 4:3 aspect display area16:9 aspect image scaled to a 4:3 aspect 
display area
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							Positioning your projector 15
How to determine the position of the projector for a given 
screen size
1. Select your screen size.
2. Refer to the table and find the closest match to your screen size in the left columns 
labelled 4:3 Screen Diagonal. 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 center 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 4467 mm 
and with a vertical offset of 183 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 29 for details.
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 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 
diagonal 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 4593 mm. Looking across this row shows that a 3000 mm (3 m) 
screen is required. If you can only obtain imperial sized screens, the listed screen sizes on 
either side of the 3 m screen are the 9 and 10 screens. 
Checking the min and max projection distance values for these screen sizes, indicates that 
the 4.5 m measured projection distance will need to be reduced to fit the 9 size screen, or 
increased to fit the 10 size screen. The projector can be adjusted (using the zoom control) to 
display on these different screen sizes at those projection distances. Be aware that these 
different screens have different vertical offset values.
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							Positioning your projector 16
There is 3% tolerance among these numbers 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.
4:3 Screen DiagonalDistance from Screen in mmVertical Offset in mm
FeetInchesmmMin length 
(with max. 
zoom)Ave r a g eMax length 
(with min. 
zoom)
4 48 1219 1778 1867 1956 73
1500 2187 2297 2406 90
5 60 1524 2222 2333 2444 91
6 72 1829 2667 2800 2933 110
2000 2916 3062 3208 120
7 84 2134 3111 3267 3422 128
8 96 2438 3556 3733 3911 146
2500 3645 3828 4010 150
9 108 2743 4000 4200 4400 165
3000 4347 4593 4812 180
10 120 3048 4444 4667 4889 183
3500 5104 5359 5614 210
12 144 3658 5334 5601 5867 219
4000 5833 6124 6416 240
15 180 4572 6667 7000 7333 274
5000 7291 7655 8020 300
18 216 5486 7999 8399 8799 329
6000 8749 9186 9624 360
25 300 7620 11111 11667 12222 457
Maximum zoom
Minimum zoom
Projection distanceCenter of lens Screen
Offset
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