Optoma Gt720 Projector User Manual

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User Controls
SETUP
 Language
Choose the multilingual OSD menu. Press  or  into the sub 
menu and then use the 
 or  key to select your preferred  
language. Press “Enter” to finalize the selection. 
  Projection
    Front-Desktop
This is the default selection. The image is projected straight on 
the screen.
 
    Rear-Desktop
When selected, the image will appear reversed.
 
    Front-Ceiling 
When selected, the image will turn upside down.
	 Rear-Desktop and 
Rear-Ceiling are 
to be used with a 
translucent screen.     
						

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     Rear-Ceiling 
When selected, the image will appear reversed in upside down 
position.
  Menu Location
Choose the menu location on the display screen.
 Projector ID
ID definition can be set up by menu (range 0~99), and allow user 
control an individual projector by RS232. Refer to page 48 for the 
complete list of RS232 commands.
 Mute
  
Choose the “On” to turn mute on. 

 Choose the “Off” to turn mute off. 
 
Volume
  Press the  to decrease the volume.
 
  Press the  to increase the volume.
  Wireless
Choose the “On” to turn on the Wireless.
	 “Wireless” is only 
functional with 
VGA connector
 
  Warning: Wired 
VGA will not func-
tion and projector 
may shut down if it 
is connected when 
Wireles is turned 
on. 
	 Optional wireless 
dongle is needed 
to use the wireless 
function on the 
projector.   
						

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User Controls
SETUP | Security
 Security
 
On: Choose “On” to use security verification when the turning  on the projector.
 Off: Choose “Off” to be able to switch on the projector without 
password verification.
 Security Timer
Can be select the time (Month/Day/Hour) function to set the 
number of hours the projector can be used. Once this time has 
elapsed you will be requested to enter your password again.
  Change Password
 
First time:
1.  Press “
” to set the password.
2.  The password has to be 4 digits. 
3.  Use number button on the remote to enter your new 
password and then press “
” key to confirm your 
password.
 Change Password:
1.  Press “
” to input old password.
2.  Use number button to enter current password and then 
press “
” to confirm. 
3.  Enter new password (4 digits in length) using the number 
buttons on the remote, then press “
” to confirm.
4.  Enter new password again and press “
” to confirm. 
	Pass-code default 
value is “1234” (first 
time). 
						

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 If the incorrect password is entered 3 times, the projector will 
automatically shut down.
 If you have forgotten your password, please contact your local 
office for support.
  
						

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User Controls
SETUP | Signal
 Automatic
Automatically selects the singal. If you use this function, the 
Phase, frequency items are grayed out, and if Signal is not auto -
matic, the phase, frequency items will appear for user to manually 
tune and saved in settings after that for next time projector turns 
off and on again.
  Phase
Synchronize the signal timing of the display with the graphic card. 
If the image appears to be unstable or flickers, use this function to 
correct it.
 Frequency
Change the display data frequency to match the frequency of 
your computer’s graphic card. Use this function only if the image 
appears to flicker vertically.
 H. Position
 
Press the  to move the image left.
 Press the  to move the image right. 
 V. Position
 
Press the  to move the image down.
 Press the  to move the image up. 
	 “Signal” is only 
supported in Analog 
VGA (RGB) signal.     
						

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  Source Lock
 
On:  The projector will only search current input connection.
 Off: The projector will search for other signals if the current 
input signal is lost.  
 High Altitude
When “On” is selected, the fans will spin faster. This feature is 
useful in high altitude areas where the air is thin.
 Information Hide
 
On: Choose “On” to hide the info message.
 Off: Choose “Off” to show the “searching” message.
 Keypad Lock
When the keypad lock function is “On”, the control panel will be 
locked however, the projector can be operated by the remote 
control. By selecting “Off”, you will be able to reuse the control 
panel.
  Background Color
Use this feature to display a “Black”, “Red”, “Blue”, “Green” or 
“White”, screen when no signal is available.
  Test Pattern
Display a test pattern. There are Grid, White pattern and None.
 Reset
Choose “Yes” to return the display parameters on all menus to the 
factory default settings.
OPTIONS
	 To turn off the key-
pad lock, press and 
hold “Enter” key on 
top of the projector 
for 5 seconds. 
						

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User Controls
OPTIONS | 
Advanced
  Direct Power On
Choose “On” to activate Direct Power mode. The projector will 
automatically power on when AC power is supplied, without 
pressing the “
” key on the projector control panel or on the 
remote control.
  Auto Power Off (min)
Sets the countdown timer interval. The countdown timer will start, 
when there is no signal being sent to the projector. The projector 
will automatically power off when the countdown has finished (in 
minutes).
 Sleep Timer (min)
Sets the countdown timer interval. The countdown timer will start, 
with or without a signal being sent to the projector. The projector 
will automatically power off when the countdown has finished (in 
minutes).
  
						

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OPTIONS |   
Lamp Settings
  Lamp Hours
Display the projection time.
 Lamp Reminder
Choose this function to show or to hide the warning message 
when the changing lamp message is displayed.   
The message will appear 30 hours before suggested replacement 
of lamp.
  Brightness Mode
  
STD: Choose “STD” to dim the projector lamp which will lower 
power consumption and extend the lamp life. 
 BRIGHT: Choose “BRIGHT” to increase the brightness. 
  Lamp Reset
Reset the lamp hour counter after replacing the lamp.
	 When ambient tem -
perature is over 35 °C 
in operating, the 
projector will switch 
to STD automatically.
  
						

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Appendices
 No image appears on-screen
 
Ensure all the cables and power connections are correctly and 
securely connected as described in the “Installation” section.
  Ensure all the pins of connectors are not bent or broken.
 Check if the projection lamp has been securely installed. Please 
refer to the “Replacing the lamp” section.
  Make sure you have removed the lens cap and the projector is 
switched on.
  Ensure that the “AV mute” feature is not turned on.
 Partial, scrolling or incorrectly displayed image
 
Press “Re-SYNC” on the remote.
 If you are using a PC:
  For Windows 95, 98, 2000, XP, Windows 7:
1.  Open the “My Computer” icon, the “Control Panel” folder, and 
then double click on the “Display” icon.
2.  Select the “Settings” tab.
3.  Verify that your display resolution setting is lower than or equal 
to UXGA (1600 × 1200).
4.  Click on the “Advanced Properties” button.
If the projector is still not projecting the whole image, you will also 
need to change the monitor display you are using. Refer to the 
following steps.
5.  Verify the resolution setting is lower than or equal to UXGA 
(1600 × 1200).
  6.  Select the “Change” button under the “Monitor” tab.
Troubleshooting
 If you experience a problem with your projector, 
please refer to the following information. If a 
problem persists, please contact your local   
reseller or service center.  
						

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Appendices
  7.  Click on “Show all devices”. Next, select “Standard monitor 
types” under the SP box; choose the resolution mode you need 
under the “Models” box. 
  8.  Verify that the resolution setting of the monitor display is lower 
than or equal to  UXGA (1600 × 1200). 
 If you are using a Notebook:
  1.  First, follow the steps above to adjust resolution of the   
computer.
  2.  Press the appropriate keys listed below for your notebook 
manufacturer to send signal out from notebook to projector. 
Example: [Fn]+[F4]
  
 
  If you experience difficulty changing resolutions or your monitor 
freezes, restart all equipment including the projector.
  The screen of the Notebook or PowerBook computer is not 
displaying your presentation
 
If you are using a Notebook PC
Some Notebook PCs may deactivate their own screens when a 
second display device is in use. Each has a different way to be  
reactivated. Refer to your computer’s manual for detailed   
information.
  Image is unstable or flickering
 
Use “Phase” to correct it. See page 35  for more information.
 Change the monitor color setting on your computer.
 Image has vertical flickering bar
 
Use “Frequency” to make an adjustment. See page 35 for more 
information.
  Check and reconfigure the display mode of your graphic card to 
make it compatible with the projector. 
Acer    
[Fn]+[F5]
Asus    [Fn]+[F8]
Dell    [Fn]+[F8]
Gateway   
[Fn]+[F4]
Mac Apple: 
System Preference  Display  Arrangement   Mirror 
displayIBM/Lenovo   [Fn]+[F7]
HP/Compaq   [Fn]+[F4]
NEC     [Fn]+[F3]
Toshiba      [Fn]+[F5]