Optoma Gt750 Xl Projector User Manual

31English
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...

32English
User Controls
    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 pages 50~53 for 
the complete list of RS232 commands. 

33English
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...

34English
User Controls
 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.
  

35English
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...

36English
User Controls
SETUP |  
Audio Settings
 Internal Speaker
Choose the “On” or “Off” to turn on or off the internal speaker.
 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.
  Audio Input
The default audio settings are on the back panel of the projector . 
Use this option to reassign any of the Audio Inputs to the current 
image source. 
 AUDIO: Audio connector port.
 HDMI: HDMI...

37English
User Controls
 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...

38English
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...

39English
User Controls
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. 
 Image AI: Image AI improves the contrast...

40English
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...