Bench Mx750/mp780st Digital Projector User Manual

							Introduction 11
Controls and functions
Projector
6. AUTO
Automatically determines the best picture 
timings for the displayed image. See 
Auto-adjusting the image on page 31 for 
details.
7. Power/POWER indicator light
Toggles the projector between standby 
mode and on.See Starting up the 
projector on page 30 and Shutting down 
the projector on page 69 for details.
Lights up or flashes when the projector is 
under operation. See Indicators on page 
90 for detail.
8. TEMPerature indicator light
Lights up red if the projectors 
temperature becomes too high. See 
Indicators on page 90 for details.
9. Right/
When the On-Screen Display (OSD) 
menu is activated, the #2, #3, and #9 keys 
are used as directional arrows to select the 
desired menu items and to make 
adjustments. See Using the menus on 
page 33 for details.
Activates panel key lock. See Locking 
control keys on page 45 for details.
10. LAMP indicator light
Indicates the status of the lamp. Lights up 
or flashes when the lamp has developed a 
problem. See Indicators on page 90 for 
details.
11. SOURCE
Displays the source selection bar. See 
Switching input signal on page 36 for 
details. 1. MENU/EXIT
Turns on the On-Screen Display (OSD) 
menu. Goes back to previous OSD menu, 
exits and saves menu settings.
2. Keystone/Arrow keys ( / Up,  /
Down)
Manually corrects distorted images 
resulting from an angled projection. See 
Correcting keystone on page 32 for 
details.
3. Left/
Starts the FAQ function. See Utilizing FAQ 
function on page 44 for details.
4. MODE/ENTER
Selects an available picture setup mode. See 
Selecting a picture mode on page 39 for 
details.
Activates the selected On-Screen Display 
(OSD) menu item. See Using the menus 
on page 33 for details.
5. BLANK
Used to hide the screen picture. See Hiding 
the image on page 44 for details.
#- / ,#- / ,
7
6
2
3
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12
89
1011
II 
						

							Introduction 12
Mounting 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 or wall, we strongly recommend 
that you use a proper fitting BenQ projector ceiling mount kit or wall mount kit and 
that you ensure it is securely and safely installed.
If you use a non-BenQ brand projector mounting kit, there is a safety risk that the 
projector may fall from the ceiling or wall due to an improper attachment through the 
use of the wrong gauge or length screws.
You can purchase a BenQ projector ceiling mount or wall 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 mounting bracket. This will 
perform the secondary role of restraining the projector should its attachment to the 
mounting bracket become loose. 
						

							Introduction 13
Remote control
1. ON
Turns on the projector. See Starting up the 
projector on page 30 for details.
2. COMPUTER-1/COMPUTER-2
Displays RGB (PC)/Component video 
(YPbPr/ YCbCr) signal.
3. S-VIDEO
Displays S-video signal.
4. MENU/EXIT
Turns on the On-Screen Display (OSD) 
menu. Goes back to previous OSD menu, 
exits and saves menu settings. See Using 
the menus on page 33 for details.
5. BLANK
Used to hide the screen picture. See Hiding 
the image on page 44 for details.
6. Keystone/Arrow keys ( / Up,  /
Down)
Manually corrects distorted images 
resulting from an angled projection. See 
Correcting keystone on page 32 for 
details.7. MODE/ENTER
Selects an available picture setup
mode. See Selecting a picture mode on 
page 39 for details. 
Activates the selected On-Screen
Display (OSD) menu item. See Using 
the menus on page 33 for details.
8. Left/
Starts the FAQ function. See Utilizing 
FAQ function on page 44 for details.
9. ZOOM+/ZOOM-
Magnifies or reduces the projected 
picture size. See Magnifying and 
searching for details on page 37 for 
details.
10.
PAGE UP/PAGE DOWN
Page up/dow n arrows when connected 
through USB to a PC. See Remote 
paging operations on page 43 for details.
11. FREEZE
Freezes the projected image. See 
Freezing the image on page 44 for 
details.
12. Network Setting
Enables Network Settings OSD menu.
13. TEST
Displays the test pattern. See Test 
Pattern on page 73 for details.
14. OFF
Turns off the projector. See Shutting 
down the projector on page 69 for 
details.
15. VIDEO
Displays vidoe signal.
16. NETWORK
Enables the network mode.
17. SOURCE
Displays the source selection bar. See 
Switching input signal on page 36 for 
details.
1
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6
21
17418
9
24
22
20
152
3
5
10
11
25
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23 
						

							Introduction 1418. AUTO
Automatically determines the best picture 
timings for the displayed image. See 
Auto-adjusting the image on page 31 for 
details.
19. Right/
When the On-Screen Display (OSD) 
menu is activated, the #6, #8, and #19 keys 
are used as directional arrows to select the 
desired menu items and to make 
adjustments. See Using the menus on 
page 33 for details.
Activates panel key lock. See Locking 
control keys on page 45 for details.
20. LASER
Emits visible laser pointer light for 
presentation purposes.
21. VOLUME+/VOLUME-
Adjusts the projector’s sound level. See 
Adjusting the sound on page 46 for 
details.
22. MUTE
Toggles projector audio between on and 
off. See Muting the sound on page 46 for 
details.23. ASPECT
Selects the display aspect ratio. See 
Selecting the aspect ratio on page 37 for 
details.
24. MIC/VOL
Adjusts the microphone’s sound level. See  
for details. See Adjusting the 
microphone’s sound level on page 46 for 
details.
25. CAPTURE
Captures current displayed screen to be 
MyScreen. See Creating your own 
startup screen on page 42 for details.
Operating the LASER pointer
The Laser Pointer is a presentation 
aid for professionals. It emits red 
colored light when you press it and 
the indicator lights up red.
The laser beam is visible. It is 
necessary to press and hold LASER 
for continuous output.
Do not look into the laser light window 
or shine the laser light beam on 
yourself or others. See the warning 
messages on the back of the remote 
control prior to using it.
The laser pointer is not a toy. Parents should be 
mindful of the dangers of laser energy and keep 
this remote control out of the reach of children. 
						

							Introduction 15 Infra-Red (IR) remote control sensor is located on the front of the projector. The remote 
control must be held at an angle within 30 degrees perpendicular to the projectors IR 
remote control sensor to function correctly. The distance between the remote control and 
the sensor should not exceed 8 meters (~ 26 feet).
Make sure that there are no obstacles between the remote control and the IR sensor on the 
projector that might obstruct the infra-red beam.
Replacing the remote control battery
1. To open the battery cover, turn the remote control over to view its back, push on the 
finger grip on the cover and slide it up in the direction of the arrow as illustrated. The 
cover will slide off.
2. Remove any existing batteries (if necessary) and install two AAA batteries observing 
the battery polarities as indicated in the base of the battery compartment. Positive (+) 
goes to positive and negative (-) goes to negative.
3. Refit the cover by aligning it with the base and sliding it back down into position. Stop 
when it clicks into place.
• 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• Operating the projector from the rear
A
pprox
. 
22.
5°
Ap
prox
. 
22.
5° 
						

							Positioning your projector 16
Positioning your projector
Choosing a location
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.
Your projector is designed to be installed in one of four possible installation locations: 
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 Front Ceiling in the SYSTEM SETUP: Basic > 
Projector Position 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 Rear Table in the SYSTEM SETUP: Basic > Projector 
Position 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 Rear Ceiling in the SYSTEM SETUP: Basic > 
Projector Position menu after you turn the projector on. 
						

							Positioning your projector 17
Obtaining a preferred projected image size
The distance from the projector lens to the screen, the zoom setting (if available), and the 
video format each factors in the projected image size.
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). 
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 19-20, 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 for MX750 and a table of 16:10-
aspect-ratio screen sizes for MP780 ST 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). 
						

							Positioning your projector 18
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 19-20 and find the closest match to your screen size in the 
left columns labelled Screen size. 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 (mm) 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 the MX750 and a 120-inch screen, the average projection 
distance is 4420 mm and with a vertical offset of 274 mm. If you are using the MP780 ST and 
a 120-inch screen, the average projection distance is 1274 mm and with a vertical offset of 
202 mm.
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 19-20 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 size 
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 (mm) value. This will determine the final placement of the screen in relation to 
the horizontal plane of the projector. 
For example, if you are using the MX750 and your measured projection distance is 3.0 m 
(3000 mm), the closest match in the Average column is 2947 mm. Looking across this row 
shows that a 80-inch screen is required. If you are using the MP780 ST and your measured 
projection distance is 3.0 m (3000 mm), the closest match in the Average column is 2698 
mm. Looking across this row shows that a 250-inch screen is required.
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 32 on page for details. 
						

							Positioning your projector 19
MX750 Projection dimensions
Refer to Dimensions on page 93 for the center of lens dimensions of this projector before 
calculating the appropriate position.
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.
Screen sizeDistance from screen (mm)Ve r t i c a l  o f f s e t  
(mm)
DiagonalW
(mm)H
(mm) Min lengthAv e r a g eMax length
Inchmm(max. zoom) (min. zoom)
30 762 610 457 850 1105 1360 69
40 1016 813 610 1133 1473 1813 91
50 1270 1016 762 1417 1842 2267 114
60 1524 1219 914 1700 2210 2720 137
80 2032 1626 1219 2267 2947 3627 183
100 2540 2032 1524 2833 3683 4533 229
120 3048 2438 1829 3400 4420 5440 274
150 3810 3048 2286 4250 5525 6800 343
200 5080 4064 3048 5667 7367 9067 457
220 5588 4470 3353 6233 8103 9973 503
250 6350 5080 3810 7083 9208 11333 572
300 7620 6096 4572 8500 11050 13600 686
Maximum zoom
Minimum zoom
Projection distanceCenter of lens Screen
Vertical offset 
						

							Positioning your projector 20
MP780 ST Projection dimensions
Refer to Dimensions on page 93 for the center of lens dimensions of this projector before 
calculating the appropriate position.
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.
Screen size
Distance from screen (mm)Vertical offset (mm)DiagonalW
(mm)H
(mm)
Inchmm
30 762 610 457 289 50
40 1016 813 610 398 67
50 1270 1016 762 508 84
60 1524 1219 914 617 101
80 2032 1626 1219 836 135
100 2540 2032 1524 1055 168
120 3048 2438 1829 1274 202
150 3810 3048 2286 1603 252
200 5080 4064 3048 2150 337
220 5588 4470 3353 2369 370
250 6350 5080 3810 2698 421
300 7620 6096 4572 3245 505
Maximum zoom
Minimum zoom
Projection distanceCenter of lens Screen
Vertical offset