BenQ Projector MX768 User Manual

							Operation81
FUNCTIONDESCRIPTION
Standby 
Settings
Network
Selecting On enables the function, and the projector can be 
monitored or controlled over a network when it is in standby mode.   
Microphone
Selecting On enables the function, and the microphone can be used 
even 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 and 
MONITOR OUT jacks are correctly connected to devices. See 
Connecting a monitor on page 23 for how to make the connection.
Enabling this function slightly increases the standby power 
consumption.
The Monitor Out only works when an appropriate D-Sub input is 
made to the COMPUTER 1 jack.
Audio Pass Through
The projector can play sound when it is in standby mode and the 
corresponding jacks are correctly connected to devices. Press  /  
to choose the source that you wish to use. See Connection on 
page 20 for how to make the connection.
Enabling this function slightly increases the standby power 
consumption.
Network 
Settings
Wired LAN
See Controlling the projector through a LAN environment on page 
48 for details.
Wireless LAN
See Controlling the projector through a LAN environment on page 
48 for details.
Remote Desktop
See Displaying image through Q Presenter on page 58 for details.
Projection Login Code
See Using the Projection Login Code on page 61 for details.
Broadcasting
See Using the broadcassting function on page 62 for details.
5. SYSTEM SETUP: Advanced menu 
						

							Operation 82
FUNCTIONDESCRIPTION
Network 
Settings
AMX Device Discovery
Selecting 
On the projector can be detected by AMX controller.
Mac Address
Show Mac address.
Reset All 
Settings
Returns all settings to the factory preset values.
The following settings will still remain: User 1, User 2, Projector 
Position, Color Space Conversion, High Altitude Mode, Security 
Settings, Baud Rate and Network Settings
Current 
System 
Status
Source
Shows the current signal source.
Picture Mode
Shows the selected mode in the PICTURE menu.
Lamp Mode
Shows the current lamp mode.
Resolution
Shows the native resolution of the input signal.
3D Format
Shows the current 3D mode.
Color System
Shows input system format, NTSC, PAL, SECAM, or RGB.
Equivalent Lamp
Displays the number of hours the lamp has been used.
Firmware Version
Shows firmware version.
5. SYSTEM SETUP: Advanced menu
6. INFORMATION menu 
						

							Maintenance 83
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. 
• Use a canister of compressed air to remove dust. 
• If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens 
cleaner and gently wipe the lens surface.
• Never use any type of abrasive pad, alkaline/acid cleaner, scouring powder, or volatile 
solvent, such as alcohol, benzene, thinner or insecticide. Using such materials or 
maintaining prolonged contact with rubber or vinyl materials may result in damage to 
the projector surface and cabinet material.
Never rub the lens with abrasive materials.
Cleaning the projector case
Before you clean the case, turn the projector off using the proper shutdown procedure as 
described in Shutting down the projector on page 66 and unplug the power cord.
• To remove dirt or dust, wipe the case with a soft, lint-free cloth.
• To remove stubborn dirt or stains, moisten a soft cloth with water and a neutral pH 
detergent. Then wipe the case.
Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the 
case.
Storing the projector
If you need to store the projector for an extended time, please follow the instructions 
below:
• Make sure the temperature and humidity of the storage area are within the 
recommended range for the projector. Please refer to Specifications on page 92 or 
consult your dealer about the range.
• Retract the adjuster feet.
• Remove the battery from the remote control.
• Pack the projector in its original packing or equivalent.
Transporting the projector
It is recommended that you ship the projector with its original packing or equivalent. 
						

							Maintenance
84
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. The method of calculating the equivalent lamp hour is as 
follows:
Total (equivalent) lamp hour
= 1 (hours used in Economic mode) + 4/3 (hours used in normal mode)
See Setting Lamp Mode eco function as Economic or SmartEco mode below for more 
information on Economic mode.
The lamp hour in Economic mode is calculated as 3/4 of that in Normal mode. That is, 
using the projector in Economic mode helps to extend the lamp hour by 1/3.
To obtain the lamp hour information:
1. Press MENU/EXIT and then press  /  until the SYSTEM SETUP: Advanced 
menu is selected.
2. Press   to select Lamp Settings and press MODE/ENTER. The Lamp Settings 
page displays.
3. You will see the Equivalent lamp hour information displaying on the menu.
4. To leave the menu, press MENU/EXIT.
You can also get the lamp hour information on the INFORMATION menu.
Extending lamp life
The projection lamp is a consumable item. To keep the lamp life as long as possible, you 
can do the following settings via the OSD menu or remote control.
Setting Lamp Mode eco function as Economic or SmartEco mode
Using Economic /SmartEco mode will reduces system noise and power consumption. If 
the 
Economic/SmartEco mode is selected, the light output will be reduced and result in 
darker projected pictures, the projector protected for longer working life.
Setting the projector in Economic/SmartEco mode also extends the lamp operation life. 
To  s e t 
Economic/SmartEco mode, go into the SYSTEM SETUP: Advanced > Lamp 
Settings > Lamp Mode menu and press /. .
The lamp modes are defined as the chart below.
Setting Auto Power Off
This function allows the projector to turn off automatically if no input source is detected 
after a set period of time to prevent unnecessary waste of lamp life.
To  s e t  Auto Power Off, go into the SYSTEM SETUP: Basic > Operation Settings 
> Auto Power Off menu and press  / . The time period can be set from 5 to 30 
minutes in 5-minute increments. If the preset time lengths are not suitable for your 
Lamp ModeDescription
Normal 100% lamp brightness.
Economic Saves 20% lamp power consumption.
SmartEcoSaves up to 70% lamp power consumption depending on the content 
brightness level. 
						

							Maintenance 85 presentation, select Disable. The projector will not automatically shut down in a certain 
time period.
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.
The Lamp indicator light and Temperature warning light will light up if the lamp becomes too 
hot. See Indicators on page 89 for details.
The following lamp warning displays will remind you to change the lamp.
The warning messages below are for reference only. Please follow the actual on-screen 
instructions to prepare and replace the lamp.
StatusMessage
Install a new lamp for optimal performance. If the 
projector is normally run with Economic 
selected (see Setting Lamp Mode eco function as 
Economic or SmartEco mode on page 84), you 
may continue to operate the projector until the 
next lamp warning appears.
Press ENTER to dismiss the message.
It is strongly recommended that you replace the 
lamp at this stage. The lamp is a consumable item. 
The lamp brightness diminishes with use. This is a 
normal lamp behavior. You can replace the lamp 
whenever you notice that the brightness level has 
significantly diminished.
Press ENTER to dismiss the message.
The lamp MUST be replaced before the projector 
will operate normally.
Press ENTER to dismiss the message. 
						

							Maintenance
86
Replacing the lamp
• Hg - Lamp contains mercury. Manage in accordance with local disposal laws. See 
www.lamprecycle.org.
• If lamp replacement is performed while the projector is suspended upside-down from the 
ceiling, make sure that no one is underneath the lamp socket to avoid any possible injury or 
damage to the human eyes caused by fractured 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 quality by touching the 
lens, do not touch the empty lamp comparent when the lamp is removed.
• This lamp contains mercury. Consult your local hazardous waste regulations to dispose of 
this lamp in a proper manner.
• To assure optimal performance from the projector, it is recommended that you purchase a 
BenQ projector lamp for lamp replacement.
• Ensure good ventilation when handling broken lamps. We recommend that you use 
respirators, safety glasses, goggles or face shield and wear protective clothing such as gloves.
1. Turn the power off and disconnect the projector from the power outlet. If the lamp 
is hot, avoid burns by waiting for approximately 45 minutes until the lamp has cooled.
2. Loosen the screw on the lamp cover. 
						

							Maintenance 87 3. Remove the lamp cover by (a) sliding 
the cover toward the side of the 
projector and (b) lifting it off.
• Do not turn the power on with the lamp 
cover removed.
• Do not insert your fingers between the 
lamp and the projector. The sharp edges 
inside the projector may cause injuries.
4. Loosen the screws that secure the 
lamp.
5. Lift the handle so that it stands up. Use 
the handle to slowly pull the lamp out 
of the projector.
• Pulling it too quickly may cause the lamp to 
break and scatter broken glass in the 
projector.
• Do not place the lamp in locations where 
water might splash on it, children can reach 
it, or near flammable materials.
• Do not insert your hands into the projector 
after the lamp is removed. If you touch the 
optical components inside, it could cause 
color unevenness and distortion of the 
projected images.
6. Insert the new lamp into the lamp 
comparent and make sure it fits in the 
projector.
(b)
(a) 
						

							Maintenance
8811. Restart the projector.
Do not turn the power on with the lamp cover removed.
Resetting the lamp timer
12. After the startup logo, open the On-Screen 
Display (OSD) menu. Go to the SYSTEM 
SETUP: Advanced > Lamp Settings menu. 
Press MODE/ENTER. The Lamp Settings 
page displays. Press   to select Reset Lamp 
Timer and press MODE/ENTER. A warning 
message displays asking if you want to reset the lamp timer. Select Yes and press 
MODE/ENTER. The lamp time will be reset to 0.
Do not reset if the lamp is not new or replaced as this could cause damage. 
7. Tighten the screws that secure the 
lamp.
• Loose screw may cause a bad connection, 
which could result in malfunction.
• Do not over tighten the screws.
8. Ensure the handle is fully laid flat and 
locked in place.
9. Replace the lamp cover by sliding it 
into place.
10. Tighten the screw that secures the 
lamp cover. 
• Loose screw may cause a bad connection, 
which could result in malfunction.
• Do not over tighten the screw.
(a)
(b) 
						

							Maintenance 89
Indicators
LightStatus & DescriptionPOWERTEMPLAMP1LAMP2
Pow e r  ev e n t s
Orange Off Off OffStand-by
Green
FlashingOff Off OffPowering up
Green Off Off OffNormal operation
Orange
FlashingOff Off OffNormal power-down cooling
Red Off Off OffDownload
Green Off Red OffCW start fail
Red 
FlashingOff Off OffScaler shutdown fail (data abord)
Red Off Red OffScaler reset fail (video projector only)
Off Red Off OffLAN download fail
Off Green Off OffLAN download processing
Burn-in message
Green Off OffBurn-in ON
Green Green GreenBurn-in OFF
Lamp error messages
Off Off Red OffLamp1 error in normal operation
Off Off Off RedLamp2 error in normal operation
Off Off Red RedBoth lamps fail
Off OffRed 
FlashingOffLamp is not lit up
Thermal error messages
Red Red Off OffFan 1 error (the actual fan speed is ±25% outside the 
desired speed)
RedRed 
FlashingOff OffFan 2 error (the actual fan speed is ±25% outside the 
desired speed)
Red Green Off OffFan 3 error (the actual fan speed is ±25% outside the 
desired speed)
RedGreen
FlashingOff OffFan 4 error (the actual fan speed is ±25% outside the 
desired speed)
Green Red Off OffTemperature 1 error (over limited temperature)
GreenRed 
FlashingOff OffThermal Sensor 1 open error
Green Green Off OffThermal Sensor 1 short error
GreenGreen
FlashingOff OffThermal IC #1 I2C Connection error 
						

							Maintenance
90
Green
FlashingRed Off OffTemperature 2 error (over limited temperature)
Green
FlashingRed 
FlashingOff OffThermal Sensor 2 open error
Green
FlashingGreen Off OffThermal Sensor 2 short error
Green
FlashingGreen
FlashingOff OffThermal IC #2 I2C Connection error