BenQ Mh680 Users Manual

Operation 41
Function Description
3D
This projector features a 3D function which enables you to enjoy the 
3D movies, videos, and sporting events in a more realistic way by 
presenting the depth of the images. You need to wear a pair of 3D 
glasses to view the 3D images.
3D Mode
The default setting is Auto and the projector automatically chooses 
an appropriate 3D format when detecting 3D contents. If the 
projector cannot recognize the 3D format, press  /  to choose a 
3D mode. 
When the 3D function is...

Operation 42
Function Description
Picture ModePre-defined picture modes are provided so you can optimize your 
projector image set-up to suit your program type. See Selecting a 
picture mode on page 27 for details.
Reference 
ModeSelects a picture mode that best suits your need for the image quality 
and further fine-tune the image based on the selections listed on the 
same page below. See Setting the User 1/User 2 mode on page 27 
for details.
BrightnessAdjusts the brightness of the image. See...

Operation 43
Function Description
Quick Auto 
SearchSee Switching input signal on page 24 for details.
Color Space 
ConversionSee Changing Color Space on page 25 for details.
Presentation 
TimerReminds the presenter to finish the presentation within a certain time 
frame. See Setting the presentation timer on page 30 for details.
LanguageSets the language for the On-Screen Display (OSD) menus. See Using 
the menus on page 21 for details.
Projector 
InstallationThe projector can be installed on a ceiling...

Operation 44
Function Description
Operation 
Settings
Direct Power On
Allows the projector to turn on automatically once the power is fed 
through the power cord.
Signal Power On
Sets whether to turn the projector directly on without pressing 
POWER or ON when the projector is in standby mode and the signal 
is feed through the VGA cable.
Auto Power Off
Allows the projector to turn off automatically if no input signal is 
detected after a set period of time. See Setting Auto Power Off on 
page 48 for...

Operation 45
Function Description
High 
Altitude 
ModeA mode for operation in high altitude areas. See Operating in a high 
altitude environment on page 32 for details.
Audio 
SettingsSee Adjusting the sound on page 33 for details.
Lamp 
Settings
Lamp Mode
See Setting the Lamp Mode on page 48 for details.
Reset Lamp Timer
See Resetting the lamp timer on page 51 for details.
Equivalent Lamp
See Getting to know the lamp hour on page 48 for details on how the 
total lamp hour is calculated.
Security...

Operation 46
 
Function Description
Standby 
Settings
Network
Selecting On enables the function. The projector is able to provide the 
network function when it is in standby mode.
Monitor Out
Selecting On enables the function. The projector can output a VGA 
signal when it is in standby mode and the COMPUTER 1 jack is 
correctly connected to devices. See Connection on page 16 for how 
to make the connection.
Audio Pass Through
The projector can play sound when it is in standby mode and the 
corresponding...

Maintenance 47
Maintenance
Care of the projector
Your projector needs little maintenance. The only thing you need to do on a regular basis 
is to keep the lens and case clean.
Never remove any parts of the projector except the lamp. Contact your dealer if other 
parts need replacing.
Cleaning the lens
Clean the lens whenever you notice dirt or dust on the surface. Please be sure to turn off 
the projector and let it cool down completely before cleaning the lens.
•  Use a canister of compressed air to...

Maintenance 48
Lamp information
Getting to know the lamp hour
When the projector is in operation, the duration (in hours) of lamp usage is automatically 
calculated by the built-in timer. 
To obtain the lamp hour information:
1. Press MENU/EXIT and then press  /  to highlight the SYSTEM SETUP: 
Advanced menu.
2. Press  to highlight Lamp Settings and press MODE/ENTER. The Lamp 
Settings page appears.
3. You will see the Equivalent Lamp information displaying on the menu.
4. To leave the menu, press...

Maintenance 49
Timing of replacing the lamp
When the Lamp indicator lights up red or a message appears suggesting it is time to 
replace the lamp, please install a new lamp or consult your dealer. An old lamp may cause a 
malfunction in the projector and in some instances the lamp may explode. 
Go to http://lamp.benq.com for a replacement lamp.
The LAMP indicator light and TEMPerature warning light will light up if the lamp becomes too hot. 
Turn the power off and let the projector cool for 45 minutes....

Maintenance 50
Replacing the lamp
•  To reduce the risk of electrical shock, always turn the projector off and disconnect the power cord before 
changing the lamp.
•  To reduce the risk of severe burns, allow the projector to cool for at least 45 minutes before replacing the 
lamp.
•  To reduce the risk of injuries to fingers and damage to internal components, use caution when removing 
lamp glass that has shattered into sharp pieces.
•  To reduce the risk of injuries to fingers and/or compromising image...