BenQ Projector MU686 User Manual

Operation 31
Optimizing the image
Using Wall Color
In the situation where you are projecting onto a colored surface such as a painted wall 
which may not be white, the Wall Color feature can help correct the projected picture’s 
colors to prevent possible color difference between the source and projected pictures.
To use this function, go to the DISPLAY > Wall Color menu and press  /  to select 
a color which is closest to the color of the projection surface. There are several 
precalibrated colors to...

Operation 32
Fine-tuning the image quality in user modes
According to the detected signal type and selected picture mode, some of the below 
functions may not be available. Based on your needs, you can make adjustments to these 
functions by highlighting them and pressing  /  on the projector or remote control.
Adjusting Brightness
The higher the value, the brighter the image. And the 
lower the setting, the darker the image. Adjust this 
control so the black areas of the image appear just as 
black and...

Operation 33 3. Press  / to highlight the item you want to change and adjust the values by 
pressing / .
•R Gain/G Gain/B Gain: Adjusts the contrast levels of Red, Green, and Blue.
•R Offset/G Offset/B Offset: Adjusts the brightness levels of Red, Green, and 
Blue.
4. Press BACK to exit and save the settings
3D Color Management
In most installation situations, color management will not be necessary, such as in 
classroom, meeting room, or lounge room situations where lights remain on, or where 
building...

Operation 34For example, if you select Red and set its value at 0, only the saturation of pure red 
will be affected.
Saturation is the amount of that color in a video picture. Lower settings produce less saturated colors; a 
setting of “0” removes that color from the image entirely. If the saturation is too high, that color will be 
overpowering and unrealistic.
6. Press  to highlight Gain and adjust its values to your preference by pressing  /
. The contrast level of the primary color you select will...

Operation 35 the last 30 seconds of counting down/up, and a triple beep sound will be produced 
when the timer is up.
7. To activate the presentation timer, press   and press  /  to highlight On and 
press OK.
8. A confirmation message appears. Highlight Yes and press OK on the projector or 
remote control to confirm. You will see the message “Timer is On” displaying on 
the screen. The timer starts counting when the timer is on.
To cancel the timer, perform the following steps:
1. Go to the SYSTEM...

Operation 36
Locking control keys
With the control keys on the projector locked, you can prevent your projector settings 
from being changed accidentally (by children, for example). When the Panel Key Lock is 
on, no control keys on the projector will operate except  POWER.
1. Go to the SYSTEM SETUP: Basic > Panel Key Lock menu, and select On by 
pressing  /  on the projector or remote control. A confirmation message 
appears. 
2. Highlight Yes and press OK to confirm.
To release panel key lock, use the...

Operation 37
Adjusting the sound level
To adjust the sound level, press /, or:
1. Repeat steps 1-2 above.
2. Press  to highlight Volume and press  /  to select a desired sound level.
Turning off the Power On/Off Ring Tone
To turn off the ring tone:
1. Repeat steps 1-2 above.
2. Press  to highlight Power On/Off Ring Tone and press  /  to select Off.
The only way to change Power On/Off Ring Tone is setting On or Off here. Setting the sound mute or 
changing the sound level will not affect the Power On/Off...

Operation 38
Using the teaching templates
The projector provides several preset patterns for various teaching purposes. To activate 
the pattern:
1. Open the OSD menu and go to the DISPLAY > Teaching Template and press 
/   to select Blackboard or Whiteboard.
2. Press /  to choose the pattern you need. 
3. Press OK to activate the pattern.
Teaching 
TemplateWhiteboardBlackboard
Letter 
Formation
Worksheet
Coordinate 
Chart 

Operation 39
Shutting down the projector
1. Press  POWER and a confirmation message will display prompting you. 
If you dont respond in a few seconds, the message will disappear.
2. Press  POWER a second time. The POWER indicator light flashes orange, 
the projection lamp shuts down, and the fans will continue to run for approximately 
90 seconds to cool down the projector.
To protect the lamp, the projector will not respond to any commands during the cooling process.
3. Once the cooling process...

Operation 40
Menu operation
Menu system
Please note that the on-screen display (OSD) menus vary according to the signal type 
selected and the projector model you are using.
Main menu Sub-menu Options
1. 
DISPLAY
Wall ColorOff/Light Yellow/Pink/Light Green/Blue/
Blackboard
Aspect RatioAuto/Real/4:3/16:9/16:10
Auto KeystoneOn/Off
Keystone
Corner Fit
Position
Phase
H. Size
Digital Zoom
3D3D ModeAuto/Top Bottom/Frame Sequential/
Frame Packing/Side by Side/Off
3D Sync InvertDisable/Invert
Save 3D Settings3D...