BenQ Projector M842UST User Manual

							Introduction 11
Remote control
1. ON/OFF
Toggles the projector between standby 
mode and on.
2. Source selection buttons 
(COMPUTER 1, COMPUTER 2, 
VIDEO, S-VIDEO, HDMI, 
NETWORK
)
Selects an input source for display.
3. Keystone/Arrow keys ( / Up,  /
Down)
Manually corrects distorted images 
resulting from an angled projection.
4. MENU/EXIT
Turns on the On-Screen Display (OSD) 
menu. Goes back to previous OSD menu, 
exits and saves menu settings.
5. Left/
Decreases the projector volume. 
6. MODE/ENTER
Selects an available picture setup mode.
Activates the selected On-Screen Display 
(OSD) menu item.7. ECO BLANK
Used to hide the screen picture.
8. LASER
Emits visible laser pointer light for 
presentation purposes.
9. ZOOM+/ZOOM-
Magnifies or reduces the projected picture 
size.
10. PAGE +/PAGE -
Operate your display software program 
(on a connected PC) which responds to 
page up/down commands (like Microsoft 
PowerPoint).
11. FREEZE
Freezes the projected image.
12. NETWORK SETTING
Displays the Network Settings OSD 
menu.
13. QUICK INSTALL
Quickly selects several functions to adjust 
the projected image and displays the test 
pattern.
2
1
4
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11 10
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201918
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3 
						

							Introduction 12
Remote control effective range
The remote control must be held at an angle within 30 degrees perpendicular to the 
projectors IR remote control sensor(s) to function correctly. The distance between the 
remote control and the sensor(s) should not exceed 8 meters (~ 26 feet).
Make sure that there are no obstacles between the remote control and the IR sensor(s) on 
the projector that might obstruct the infra-red 
beam. 14. AUTO
Automatically determines the best picture 
timings for the displayed image.
15. Right/
Increases the projector volume. 
When the On-Screen Display (OSD) menu 
is activated, the #3, #5, and #15 keys are 
used as directional arrows to select the 
desired menu items and to make 
adjustments.
16. SOURCE
Displays the source selection bar.
17. MIC/VOL +/MIC/VOL -
Adjusts the microphone sound level.
18. MUTE
Toggles projector audio between on and 
off. 
19. ASPECT
Selects the display aspect ratio. 20. SMART ECO
Displays the Lamp Mode
 menu for 
selecting a suitable lamp operating mode.
21. Numeric buttons
Enters numbers in network settings.
Operating the LASER pointer
The Laser Pointer is a 
presentation aid for 
professionals. It emits red 
colored light when you press it.
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.
•  Operating the projector from the front•  Operating the projector from the rear
Ap
pro
x.
 
+
3
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ro
x. 
+
30
º 
						

							Introduction 13
Replacing the remote control batteries
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 leaving the remote control and batteries in an excessive heat or humid environment like the 
kitchen, bathroom, sauna, sunroom or in a closed car.
•  Replace only with the same or equivalent type recommended by the battery manufacturer.
•  Dispose of the used batteries according to the manufacturers instructions and local environment 
regulations for your region.
•  Never throw the batteries into a fire. There may be danger of an explosion.
•  If the batteries are dead or if you will not be using the remote control for an extended period of time, 
remove the batteries to avoid damage to the remote control from possible battery leakage. 
						

							Positioning your projector 14
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.1. Front Ceiling
Select this location with the projector 
suspended upside-down from the ceiling in 
front of the screen.
Purchase the BenQ Projector Ceiling 
Mount Kit from your dealer to mount your 
projector on the ceiling.
Set Front Ceiling in the SYSTEM 
SETUP: Basic > Projector Installation 
menu after you turn the projector on.2. 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 Mount Kit 
are required for this installation location.
Set Rear Ceiling in the SYSTEM 
SETUP: Basic > Projector Installation 
menu after you turn the projector on. 
						

							Positioning your projector 15
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.
Projection dimensions 
MX842UST
The screen aspect ratio is 4:3 and the projected picture is in a 4:3 aspect ratio
For example, if you are using an 120-inch screen, the recommended projection distance is 
802 mm and the vertical offset is 485 mm.
If your measured projection distance is 0.7 m (700 mm), the closest match in the (b) 
Distance from screen column is 708 mm. Looking across this row shows that a 110 
(about 2.8 m) screen is required.
(a)(b)
Center of lens
Screen (c)
(a) Screen size(b) Distance from screen
(mm)(c) Vertical offset
(mm)DiagonalHeight
(mm)Width
(mm)
Inchesmm
60 1524 914 1219 233 242 
70 1778 1067 1422 328 283 
80 2032 1219 1626 423 323 
90 2286 1372 1829 518 363 
100 2540 1524 2032 613 404 
110 2794 1676 2235 708 444 
120 3048 1829 2438 802 485  
						

							Positioning your projector 16
MW843UST
The screen aspect ratio is 16:10 and the projected picture is in a 16:10 aspect ratio
For example, if you are using an 120-inch screen, the recommended projection distance is 
630 mm and the vertical offset is 380 mm.
If your measured projection distance is 0.3 m (300 mm), the closest match in the (b) 
Distance from screen column is 308 mm. Looking across this row shows that a 80 (about 
2.0 m) screen is required.
All measurements are approximate and may vary from the actual sizes.
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.
(a)(b)
Center of lens
Screen (c)
(a) Screen size(b) Distance from screen
(mm)(c) Vertical offset
(mm)DiagonalHeight
(mm)Width
(mm)
Inchesmm
60 1524 808 1292 147 190 
70 1778 942 1508 227 221 
80 2032 1077 1723 308 253 
90 2286 1212 1939 388 285 
100 2540 1346 2154 469 316 
110 2794 1481 2369 549 348 
120 3048 1615 2585 630 380  
						

							Connection 17
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 8). They are commercially available from electronics stores.
•  The connection illustrations below are for reference only. The rear connecting jacks available on the 
projector vary with each projector model.
•  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.
•  The D-Sub output only works when an appropriate D-Sub input is made to the COMPUTER-1 jack.
1. VGA cable
2. VGA to DVI-A cable
3. USB cable
4. HDMI cable
5. Component Video to VGA (D-Sub) 
adapter cable6. Audio L/R cable
7. S-Video cable
8. Video cable
9. Audio cable
10. Microphone
91099123645781
Notebook or 
desktop computer
Speakers
orA/V device Monitor
(DVI)
(VGA)
orMicrophone 
						

							Connection 18
•  If you wish to use this connection method when the projector is in standby mode, make sure the 
Monitor Out function is turned on in the SYSTEM SETUP: Advanced menu. See Standby Settings 
on page 46 for details.
Connecting video source devices
You need only connect the projector to a video source device using just one of the 
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:
Connecting audio
The projector has built-in speaker(s) which are designed to provide basic audio 
functionality accompanying data presentations for business purposes only. They are not 
designed for, nor intended for stereo audio reproduction use as might be expected in 
home theater or home cinema applications.
The built-in speaker(s) will be muted when the AUDIO-OUT jack is connected.
•  The projector is only capable of playing mixed mono audio, even if a stereo audio input is connected. See 
Connecting audio on page 18 for details.
•  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.
Playing sound through the projector
You can make use of the projector (mixed mono) speaker(s) in your presentations, and 
also connect separate amplified speakers to the AUDIO OUT socket 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 mono audio projector.
You can also use a microphone to output the sound through the projector speaker(s).
Once connected, the audio can be controlled by the projector On-Screen Display (OSD) 
menus. See Audio Settings on page 45 for details.
Te r m i n a l  n a m eTerminal appearancePicture quality
HDMI
Best
Component Video
Better
S-Video
Good
Video
Normal 
						

							Connection 19 The table below describes the connection methods for different devices, and where the 
sound is from.
About the microphone input
•  If you wish to use a microphone, connect a 3.5 mini jack cable microphone to the 
projector.
•  You can use a wireless microphone as long as a wireless module is attached to the 
projector’s microphone input jack and it works well with the associated devices. To 
ensure a quality use of the wireless microphone, it is recommended that your 
microphone conforms to the specifications listed in the table below. 
•  To adjust microphone volumes
• Directly set microphone volume levels in the SYSTEM SETUP: Advanced 
> Audio Settings > Microphone Volume menu. 
•  To make the microphone input available when the projector is in standby mode, turn 
on the SYSTEM SETUP: Advanced > Standby Settings > Microphone menu.
•  If the microphone is not working, check the volume setting and cable connection.
• You might get feedback noise from the microphone when you are too close to the 
speaker(s) of the projector. Move the microphone away from the speaker(s) of the 
projector. The greater volume you require, the greater distance you need to be away 
from the speaker(s) to prevent the noise.
DevicePC/Component Video Video/S-Video Microphone
Audio input portAUDIO IN 1/AUDIO IN 
2AUDIO (L/R)
MIC
The projector can play 
the sound from...AUDIO IN 1/AUDIO IN 
2/MICAUDIO (L/R)/MIC• MIC
• AUDIO IN 1/MIC
• AUDIO IN 2 (L/R)/
MIC
Audio output portAUDIO OUT AUDIO OUT AUDIO OUT
The selected input signal determines which sound will be played by the projector speaker(s), and which 
sound will be output from the projector when AUDIO OUT is connected. If you select the COMPUTER 
1/Y Pb Pr 1 signal, the projector can play the sound received from AUDIO IN 1/MIC. If you select the 
COMPUTER 2/Y Pb Pr 2 signal, the projector can play the sound received from AUDIO IN 2/MIC.
SignalParameterMinTy p eMax
MicrophoneTr a n s d u c e r  P r i n c i p l e D y n a m i c
Impedance 300 1K ohm
Frequency response 600 16k Hz 
						

							Operation 20
Operation
Starting up the projector
1. Plug the power cord into the projector and into a 
power outlet. Turn on the power outlet switch 
(where fitted). Check that the POWER indicator 
light on the projector lights orange after power has 
been applied.
Please use the original accessories (e.g. power cord) only with the 
device to avoid possible dangers such as electric shock and fire.
2. Press  POWER or  ON to start the 
projector. As soon as the lamp lights up, a Power On Ring Tone will be heard. 
The POWER indicator light flashes green and stays green when the projector is 
on.
The start up procedure takes about 30 seconds. In the later stage of start up, a 
startup logo is projected.
(If necessary) Rotate the focus ring to adjust the image clearness.
To turn off the ring tone, see Turning off the Power On/Off Ring Tone on page 34 
for details.
If the projector is still hot from previous activity, it will run the cooling fan for approximately 90 seconds 
before energizing the lamp.
3. If the projector is activated for the first time, 
select your OSD language following the on-
screen instructions.
4. If you are prompted for a password, press the 
arrow keys to enter a six-digit password. See 
Utilizing the password function on page 23 
for details.
5. Switch all of the connected equipment on.
6. The projector will start to search for input 
signals. The current input signal being scanned displays in the upper left corner of the 
screen. If the projector doesnt detect a valid signal, the message “No Signal” will 
continue displaying until an input signal is found.
You can also press SOURCE on the projector or remote control to select your 
desired input signal. See Switching input signal on page 25 for details.
If the frequency/resolution of the input signal exceeds the projectors operating range, you will see the 
message “Out of Range” displayed on the background screen. Please change to an input signal which is 
compatible with the projectors resolution or set the input signal to a lower setting. See Timing chart on 
page 58 for details.