BenQ Projector MU686 User Manual

Introduction 11
Remote control
1. POWER
Toggles the projector between standby 
mode and on.
2. Source selection buttons 
(COMPUTER 1, VIDEO, S-VIDEO, 
HDMI, QCast
)
Selects an input source for display.
(NETWORK
)
No function.
3. Arrow keys ( Up,  Down,  Left, 
Right)
When the On-Screen Display (OSD) 
menu is activated, these keys are used as 
directional arrows to select the desired 
menu items and to make adjustments.
4. OK
Activates the selected On-Screen Display 
(OSD) menu item.
5. MENU
Turns on the...

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. 11. PAGE +/PAGE -
Operate your display software program 
(on a connected...

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.
Your projector is designed to be installed in one of the following possible installation 
locations. Corresponding setting can be made in the...

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 
The screen aspect ratio is 16:10 and the projected picture is in a 16:10 aspect ratio
Screen sizeDistance from screen (mm)Ve r t i c a l  
offset 
(mm)
DiagonalH 
(mm)W 
(mm)Min lengthAverageMax length
Inchmm(max. zoom)(min. zoom)
40 1016 538 862 991 1142 1292  0 
50 1270 673...

Positioning your projector 16For example, if you are using an 120-inch screen, the recommended projection distance is 
3425 mm.
If your measured projection distance is 5200 mm, the closest match in the Distance from 
screen (mm) column is 5137 mm. Looking across this row shows that a 180 (about 4.6 
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...

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...

Connection 18
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 PC jack.
If you...

Connection 19
Connecting video streaming dongle - QCast 
(optional accessory)
This dongle allows you to perform a wireless projection from your smart device or 
computer. To purchase the QCast dongle, contact your local dealer.
Installation
1. Loosen the screw that secures the wireless cover 
and open the wireless cover.
2. Slide the switcher on the dongle to MHL and 
connect the dongle to the HDMI-2/MHL port.
3. Replace the wireless cover and tighten the screw 
that secures the wireless cover.
Starting...

Connection 20•Press QCast on the projector or remote control.
•Press SOURCE and select HDMI-2/MHL from the source selection bar.
4. You can start the wireless projection now.
If the wireless projection stops unexpectedly, press QCast to turn off the QCast dongle. 
Pressing QCast on the projector or remote control to reboot the dongle.
The input source HDMI-2/MHL cannot be found when the projector automatically searches for the available 
signals.
Compatibility with MHL dongles of other brands is not...