Optoma Gt750 Xl Projector User Manual

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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...

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Appendices
 Image is out of focus
 Make sure the lens cap is removed.
 Adjust the Focus Ring on the projector lens. 
 Make sure the projection screen is between the required distance. 
See page 16.
 The image is stretched when displaying 16:9 DVD title
 When you play anamorphic DVD or 16:9 DVD, the projector will 
show the best image when the projector display mode is set to 
16:9 in the OSD.
 If you play 4:3 format DVD titles, please change the format to 4:3 
in the projector OSD.
 If...

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Appendices
 The projector stops responding to all controls
 If possible, turn off the projector, then unplug the power cord and 
wait at least 60 seconds before reconnecting power.
 Check that “Keypad Lock” is not activated by trying to control the 
projector with the remote control.
 Lamp burns out or makes a popping sound
 When the lamp reaches its end of life, it will burn out and may 
make a loud popping sound. If this happens, the projector will not 
turn on until the lamp module has...

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Appendices
 On Screen Messages 
 Temperature warning:
 
 Fan failed:
 
 Lamp warming:
 
 Out of display range:
 
 If the remote control does not work
 Check the operating angle of the remote control is within ±15° both horizontally and vertically of one of the IR receivers on the projector.
 Make sure there are not any obstructions between the remote control and the projector. Move to within 7 m (±0°) of the projector.
 Make sure the batteries are inserted correctly.
 Replace batteries...

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Appendices
Replacing the lamp
The projector automatically detects the lamp life. When the 
lamp life is nearing the end of use, you will receive a warning 
message.
When you see this message, please contact your local reseller 
or service center to change the lamp as soon as possible. 
Make sure the projector has been cooled down for at least 30 
minutes before changing the lamp. 
 Warning: Lamp compartment may be hot! Allow it to cool 
down before changing the lamp!
 Warning: To reduce the...

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Appendices
Lamp Replacement Procedure:
1. Switch off the power to the projector by pressing the “” button. 
2. Allow the projector to cool down for at least 30 minutes.
3. Disconnect the power cord.
4. Unscrew the two screws on the cover. 1
5. Lift up and remove the cover. 2
6. Unscrew the two screws on the lamp module. 3
7. Lift up the lamp handle and remove the lamp module slowly and carefully . 4
To replace the lamp module, reverse the previous steps.
8.  Turn on the projector and use “Lamp...

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Appendices
Compatibility Modes
ModeResolutionV-Sync (Hz)H-Sync (KHz)
AnglogDigitalAnglogDigital
VGA640 × 350707031.5031.50
VGA640 × 350858537.9037.90
VGA640 × 400858537.9037.90
VGA640 × 480606031.5031.50
VGA640 × 4806767--
VGA640 × 480727237.9037.90
VGA640 × 480757537.5037.50
VGA720 × 400707031.5031.50
VGA720 × 400858537.9037.90
SVGA800 × 600565635.2035.20
SVGA800 × 600606037.9037.90
SVGA800 × 600727248.1048.10
SVGA800 × 600757546.9046.90
SVGA800 × 600120120--
XGA1024 × 768606048.4048.40...

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Appendices
Video Compatibility
Computer Compatibility
ModeResolutionV-Sync (Hz)H-Sync (KHz)
MAC LC 13”640 × 48066.6634.98
MAC II 13”640 × 48066.6835.00
MAC 16”832 × 62474.5549.73
MAC 19”1024 × 7687560.24
MAC1152 × 87075.0668.68
MAC G4640 × 4806031.35
i MAC DV1024 × 7687560.00
i MAC DV1152 × 8707568.49
NTSCM (3.58MHz), 4.43 MHz
PALB, D, G, H, I, M, N
SECAMB, D, G, K, K1, L
SDTV/HDTV480i/p, 576i/p, 720p@50Hz/60Hz, 1080i/p@50Hz/60Hz
 
  

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Appendices
3D input Compatibility GT750 3D support table 
HDMI 1.4a 3D timing
FormatsModes Resolution Pixel Rate DLP link VESA 3D Auto 3D format Auto detection of L/R frame  3D to 2D
[Hz] [MHz]
Frame Packing 720p
1280x720 5075148.5ä
ääää720p
1280x720 6090148.5äääää1080p 1920x1080
2454148.5äääää
Top and Bottom 720p
1280x720 5037.5
74.25äääää720p
1280x720 6045
74.25äääää1080p 1920x1080
2427
74.25äääääSide by Side (half) 1080i 1920x1080
50(25)33.75...

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Appendices
RS232 Pin Assignments
Pin no.Spec.  (from projector side)
1N/A
2RXD
3TXD
4N/A
5GND
6N/A
7N/A
8N/A
9N/A
1
2
3
4
5
6
7
8
9
RS232 Commands and Protocol 
Function List