BenQ Projector MU686 User Manual

							Operation 21
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 to start the projector. As soon as the lamp lights up, a Pow e r  
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 37 
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 26 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 appears 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 28 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 60 for details.
If no signal is detected for 3 minutes, the projector automatically enters saving mode. 
						

							Operation 22
Adjusting the projected image
Adjusting the projection angle
The projector is equipped with a quick-release 
adjuster foot and 2 rear adjuster feet. These 
adjusters change the image height and projection 
angle.
To adjust the projection angle:
1. Press the quick-release button and lift the 
front of the projector. Once the image is 
positioned as desired, release the quick-
release button to lock the foot in position.
2. Screw the rear adjuster feet to fine-tune the 
horizontal angle.
To retract the feet, screw the rear adjuster feet in a 
reverse direction.
If the projector is not placed on a flat surface or the screen and the projector are not 
perpendicular to each other, the projected image becomes trapezoidal. To correct this 
situation, see Correcting keystone on page 23 for details.
Auto-adjusting the image
In some cases, you may need to optimize the picture quality. To do this, press AUTO on 
the projector or remote control. Within 3 seconds, the built-in Intelligent Auto 
Adjustment function will re-adjust the values of Frequency and Clock to provide the best 
picture quality. 
The current source information will be displayed in the corner of the screen for 3 seconds.
This function is only available when PC signal (analog RGB) is selected.
Fine-tuning the image size and clarity
212
Do not look into the lens while the 
lamp is on. The strong light from the 
lamp may cause damage to your eyes.
Be careful when you press the quick-
release button as it is close to the 
exhaust vent where hot air comes 
from.
1. Adjust the projected image to the 
size that you need using the zoom 
ring. 2. Sharpen the image by rotating the 
focus ring. 
						

							Operation 23
Correcting keystone
Keystoning refers to the situation where the projected image is noticeably wider at either 
the top or bottom. It occurs when the projector is not perpendicular to the screen. 
You can correct this automatically following these steps:
1. Press MENU and then press  /  until the DISPLAY menu is highlighted.
2. Press  to highlight Auto Keystone and press  /  to select On.
To manually correct this, you will need to 
follow these steps:
1. Do one of the following steps to 
display the keystone correction page.
•Press KEYSTONE on the 
remote control. 
•Press QUICK INSTALL on the remote control. Press   to highlight 
Keystone and press OK. 
•Press MENU and then press  /  until the DISPLAY menu is highlighted. 
Press  to highlight Keystone and press OK.
2. The Keystone correction page displays. Press   to correct keystoning at the top 
of the image. Press   to correct keystoning at the bottom of the image.
Adjusting Corner Fit
You can manually adjust four corners of the image by setting the horizontal and vertical 
values.
1. Do one of the following steps to display the 
corner fit correction page.
•Press QUICK INSTALL on the remote 
control. Press   to highlight Corner Fit 
and press OK.
•Press MENU and then press  /  until 
the DISPLAY menu is highlighted. Press 
 to highlight Corner Fit and press OK.
2. Press  / / /  to select one corner and 
press OK.
Press.Press .
Corner Fit
Back Enter 
						

							Operation 243. Press  /  to adjust vertical values.
4. Press  /  to adjust horizontal values.
Corner Fit
Back
Enter 
						

							Operation 25
Using the menus
The projector is equipped with On-Screen Display (OSD) menus for making various 
adjustments and settings.
The OSD screenshots below are for reference only, and may differ from the actual design.
Below is the overview of the OSD menu.
The following example describes how to set the OSD language.
1. Press MENU on the projector or remote 
control to turn the OSD menu on.3. Press  to highlight Language 
and press OK. 
2. Use  /  to highlight the SYSTEM 
SETUP: Basic menu.4. Press  / / /  to select a 
preferred language and press OK.
5. Press BACK to go back or press 
MENU
 to leave.
Current input signal
Main menu icon
Main menu
Sub-menu
Highlight
Press MENU 
to the 
previous 
page or to 
exit. Status
DISPLAYWall Color
Aspect Ratio
Keystone
Position
Phase
H. Size
Digital ZoomOff
Auto
0
0
ExitPC
3D
Teaching Template
Corner FitOff Auto Keystone
DISPLAYWall Color
Aspect Ratio
Position
Phase
H. Size
Digital Zoom Keystone
PCOff
Auto
0
0
Exit
3D
Teaching TemplateAuto Keystone Off
Corner Fit
SYSTEM SETUP: BasicPresentation Timer
Language
Projector Installation
Operation Settings
Panel Key Lock
Splash Screen Background Color
PC
Exit
Front Table
Off
BenQ
BenQMenu Settings
Remote ReceiverFront+Top
SYSTEM SETUP: BasicPresentation Timer
Language
Projector Installation
Operation Settings
Panel Key Lock
Splash Screen Background Color
PC
Exit
Front Table
Off
BenQ
BenQ Menu Settings
Remote ReceiverFront+Top 
						

							Operation 26
Securing the projector
Using a security cable lock
The projector has to be installed in a safe place to prevent theft. Otherwise, purchase a 
lock, such as the Kensington lock, to secure the projector. You can locate a Kensington 
lock slot on the rear side of the projector. See item 25 on page 9 for details.
A Kensington security cable lock is usually a combination of key(s) and the lock. Refer to 
the lock’s documentation for finding out how to use it.
Utilizing the password function
For security purposes and to help prevent unauthorized use, the projector includes an 
option for setting up password security. The password can be set through the On-Screen 
Display (OSD) menu.
WARNING: You will be inconvenienced if you activate the password functionality and subsequently forget the 
password. Print out this manual (if necessary) and write the password you used in this manual, and keep the 
manual in a safe place for later recall.
Setting a password
Once a password has been set and the power on lock is activated, the projector cannot be used unless the 
correct password is entered every time the projector is started.
1. Open the OSD menu and go to the SYSTEM SETUP: Advanced > Security 
Settings menu. Press OK. The Security Settings page appears.
2. Highlight Change Security Settings and press OK.
3. As pictured to the right, the four arrow keys 
(, , , ) respectively represent 4 digits 
(1, 2, 3, 4). According to the password you 
desire to set, press the arrow keys to enter six 
digits for the password.
4. Confirm the new password by re-entering the 
new password.
Once the password is set, the OSD menu 
returns to the Security Settings page.
5. To activate the Power On Lock function, press  /  to highlight Power On Lock 
and press  /  to select On.
IMPORTANT: The digits being input will display as asterisks on-screen. Write your selected password down 
here in this manual in advance or right after the password is entered so that it is available to you should you 
ever forget it.
Password: __ __ __ __ __ __
Keep this manual in a safe place.
6. To leave the OSD menu, press BACK.
If you forget the password
If the password function is activated, you will be asked 
to enter the six-digit password every time you turn on 
the projector. If you enter the wrong password, the 
password error message as pictured to the right will 
appear, and the INPUT PASSWORD message 
follows. You can retry by entering another six-digit 
password, or if you did not record the password in this 
INPUT NEW PASSWORD
Back
Password Error
Please try again. 
						

							Operation 27 manual, and you absolutely do not remember it, you can use the password recall 
procedure. See Entering the password recall procedure on page 27 for details.
If you enter an incorrect password 5 times in succession, the projector will automatically 
shut down in a short time.
Entering the password recall procedure
1. Press and hold AUTO on the projector or 
remote control for 3 seconds. The 
projector will display a coded number on 
the screen.
2. Write down the number and turn off your 
projector.
3. Seek help from the local BenQ service 
center to decode the number. You may be 
required to provide proof of purchase 
documentation to verify that you are an 
authorized user of the projector.
Changing the password
1. Open the OSD menu and go to the SYSTEM SETUP: Advanced> Security 
Settings > Change Password menu.
2. Press OK. The message “INPUT CURRENT PASSWORD” appears.
3. Enter the old password.
i. If the password is correct, another message “INPUT NEW PASSWORD” 
appears. 
ii. If the password is incorrect, the password error message will appear, and the 
message “INPUT CURRENT PASSWORD” appears for your retry. You can 
press BACK to cancel the change or try another password.
4. Enter a new password.
IMPORTANT: The digits being input will display as asterisks on-screen. Write your selected password down 
here in this manual in advance or right after the password is entered so that it is available to you should you 
ever forget it.
Password: __ __ __ __ __ __
Keep this manual in a safe place.
5. Confirm the new password by re-entering the new password.
6. You have successfully assigned a new password to the projector. Remember to enter 
the new password next time the projector is started.
7. To leave the OSD menu, press BACK.
Disabling the password function
To disable password protection, go back to the SYSTEM SETUP: Advanced > 
Security Settings > Change Security Settings menu after opening the OSD menu 
system. Press OK. The message “INPUT PASSWORD” appears. Enter the current 
password. 
i. If the password is correct, the OSD menu returns to the Security Settings 
page.
Press   to highlight Power On Lock and press  /  to select Off. You will 
not have to enter the password next time when turning on the projector.
Please write down the recall code,
and contact BenQ
Customer Center.
Recall Code:
255   255   255   255
RECALL PASSWORD
Exit 
						

							Operation 28ii. If the password is incorrect, the password error message will appear, and the 
message “INPUT PASSWORD” appears for your retry. You can press 
BACK to cancel the change or try another password.
Though the password function is disabled, you need to keep the old password in hand should you ever need to 
re-activate the password function by entering the old password.
Switching input signal
The projector can be connected to multiple devices at the same time. However, it can only 
display one full screen at a time. When starting up, the projector automatically searches for 
the available signals.
Be sure the Quick Auto Search function in the SOURCE menu is On if you want the 
projector to automatically search for the signals.
To select the source:
1. Press SOURCE. A source selection bar appears. 
2. Press / until your desired signal is selected 
and press OK.
Once detected, the selected source information 
will display at the corner of the screen for 
seconds. If there is multiple equipment connected 
to the projector, repeat steps 1-2 to search for 
another signal.
The brightness level of the projected image will change accordingly 
when you switch between different input signals. Data (graphic) 
PC presentations using mostly static images are generally brighter 
than Video using mostly moving images (movies).
The native display resolution of this projector is in a 16:10 aspect ratio. For best display picture results, you 
should select and use an input signal which outputs at this resolution. Any other resolutions will be scaled by 
the projector depending upon the “aspect ratio” setting, which may cause some image distortion or loss of 
picture clarity. See Selecting the aspect ratio on page 29 for details.
Changing Color Space
In the unlikely event that you connect the projector to a DVD player via the projector’s 
HDMI input and the projected picture displays wrong colors, please change the color 
space to YUV.
To  d o  t h i s :
1. Press MENU and then press  /  until the SOURCE menu is highlighted.
2. Press   to highlight Color Space Conversion and press  /  to select a suitable 
color space.
This function is only available when the HDMI-input port is in use. 
						

							Operation 29
Magnifying and searching for details
If you need to find the details on the projected picture, magnify the picture. Use the 
direction arrow keys for navigating the picture.
1. Press MENU and then press  /  until the DISPLAY menu is highlighted.
2. Press
  to highlight Digital Zoom and press OK. The Zoom bar appears.
3. Press   repeatedly to magnify the picture to a desired size.
4. To navigate the picture, press OK to switch to the panning mode and press the 
directional arrows ( ,  ,  ,  ) on the projector or remote control to navigate 
the picture.
5. To reduce size of the picture, press AUTO to restore the picture to its original size. 
You can also press   repeatedly until it is restored to the original size.
The picture can only be navigated after it is magnified. You can further magnify the picture while searching for 
details.
Selecting the aspect ratio
The “aspect ratio” is the ratio of the image width to the image height. Most analog TV and 
some computers are in 4:3 ratio, and digital TV and DVDs are usually in 16:9 ratio.
With the advent of digital signal processing, digital display devices like this projector can 
dynamically stretch and scale the image output to a different aspect than that of the image 
input signal.
To change the projected picture ratio (no matter what aspect the source is):
•  Using the remote control
1. Press ASPECT to show the current setting.
2. Press ASPECT repeatedly to select an aspect ratio to suit the format of the video 
signal and your display requirements.
•  Using the OSD menu
1. Press MENU and then press  /  until the DISPLAY menu is highlighted.
2. Press
  to highlight Aspect Ratio.
3. Press  /  to select an aspect ratio to suit the format of the video signal and your 
display requirements. 
						

							Operation 30
About the aspect ratio
In the pictures below, the black portions are inactive areas and the white portions are active areas.
OSD menus can be displayed on those unused black areas.
1.Auto: Scales an image proportionally to fit the 
projectors native resolution in its horizontal or 
vertical width. This is suitable for the incoming 
image which is neither in 4:3 nor 16:9 and you 
want to make most use of the screen without 
altering the images aspect ratio.
2.Real
: The image is projected as its original 
resolution, and resized to fit within the display 
area. For input signals with lower resolutions, 
the projected image will display smaller than if 
resized to full screen. You could adjust the zoom 
setting or move the projector towards the 
screen to increase the image size if necessary. 
You may also need to refocus the projector after 
making these adjustments.
3.4:3: Scales an image so that it is displayed in the 
center of the screen with a 4:3 aspect ratio. This 
is most suitable for 4:3 images like some 
computer monitors, standard definition TV and 
4:3 aspect DVD movies, as it displays them 
without aspect alteration.
4.16:9: Scales an image so that it is displayed in 
the center of the screen with a 16:9 aspect ratio. 
This is most suitable for images which are 
already in a 16:9 aspect, like high definition TV, 
as it displays them without aspect alteration.
5.16:10: Scales an image so that it is displayed in 
the center of the screen with a 16:10 aspect 
ratio. This is most suitable for images which are 
already in a 16:10 aspect, as it displays them 
without aspect alteration.
15:9 picture
4:3 picture
16:9 picture
4:3 picture
16:9 picture
16:10 picture