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...

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...

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...

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...

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),...

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...

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...

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...

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...

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...