Optoma Gt720 Projector User Manual

							11English
Installation
Connect to Computer/Notebook
Connecting the Projector
VGA-IN / YPbPr /S-VIDEO VIDEO
AUDIO-OUT
RS-232
HDMIRCA-R
RCA-L
E62405SP
R
1
234
1. ................................................................................................... Power Cord
2. .......................................................................................... *DVI/HDMI Cable
3. .................................................................................................... VGA Cable
4. ............................................................................................... *RS232 Cable
5. ........................................................................................ *Audio Input Cable 
6. ..................................................................................... *Audio Output Cable
	
Due to the 
difference in 
applications 
for each 
country, some 
regions may 
have different 
accessories.
	 (*) Optional 
accessory 
56 
						

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English
Installation
VGA-IN / YPbPr /S-VIDEO VIDEO
AUDIO-OUT
RS-232
HDMIRCA-R
RCA-L
E62405SP
R
Connect to Video Sources
1. ................................................................................................... Power Cord
2. ................................................................................................. *HDMI Cable
3. ............................................... *15-Pin to 3 RCA Component/HDTV Adaptor
4. ............................................................................ *3 RCA Component Cable
5 .............................................................................................. *S-Video Cable
6. ............................................................................... *Composite Video Cable
7. ................................................................................ *Audio Cable Jack/RCA
Composite Video Output
DVD Player, Set-top Box, 
HDTV receiver
S-Video Output
1
4
3
2
6
7
	Due to the 
difference in 
applications 
for each 
country, some 
regions may 
have different 
accessories.
	 (*) Optional 
accessory 
Audio Input
5
7       
						

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Installation
Powering On/Off the Projector
	Turn on the 
projector first and 
then select the 
signal sources.
Powering On the Projector
1. Remove the lens cap. 
2.  Securely connect the power cord and signal cable. When 
connected, the ON/STANDBY LED will turn Amber. 
3.  Turn on the lamp by pressing “
” button either on the top of 
the projector or on the remote. The ON/STANDBY LED will 
now turn Green. 
  The startup screen will display in approximately 10 seconds. 
The first time you use the projector, you will be asked to 
select the preferred language and power saving mode. 
4.  Turn on and connect the source that you want to display 
on the screen (computer, notebook, video player, etc). The 
projector will detect the source automatically. If not, push 
menu button and go to “OPTIONS”.  
Make sure that the “Source Lock” has been set to “Off”.
	 If you connect multiple sources at the same time, press the 
“SOURCE” button on the control panel or direct source keys 
on the remote control to switch between inputs.
POWER
Lens Cap1
Power 2  
						

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English
Installation
	 Contact the 
nearest service 
center if the 
projector displays 
these symptoms. 
See pages 
53-54 for more 
information.
Warning Indicator
When the warning indicators (see below) come on, 
the projector will automatically shutdown:
 
  “LAMP” LED indicator is lit red and if “On/Standby” indicator 
flashes amber.
  “TEMP” LED indicator is lit red and if “On/Standby” 
indicator flashes amber. This indicates the projector has 
overheated. Under normal conditions, the projector can be 
switched back on.
  “TEMP” LED indicator flashes red and if “On/Standby”  
indicator flashes amber. 
 
 
Unplug the power cord from the projector, wait for 30 seconds 
and try again. If the warning indicator light up again, please 
contact your nearest service center for assistance. 
Powering  Off the Projector
1.  Press the “” button on the remote control or 
on the control panel to turn off the projector. 
The following message will be displayed on the screen. 
   Press the “” button again to confirm otherwise the 
message will disappear after 15 seconds. When you 
press the “
” button for the second time, the projector will 
display countdown timer and will shut down.
2.  The cooling fans continue to operate for about 10 seconds 
for cooling cycle and the ON/STANDBY LED will Flash 
Green. When the ON/STANDBY LED lights solid Amber, 
the projector has entered standby mode.
  If you wish to turn the projector back on, you must wait 
until the projector has completed the cooling cycle and 
has entered standby mode. Once in standby mode, simply 
press “
” button to restart the projector.
3.  Disconnect the power cord from the electrical outlet and 
the projector.
4.  Do not turn on the projector immediately following a power 
off procedure. 
						

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Installation
Adjusting the Projected Image
Adjusting the Projector’s Height 
The projector is equipped with elevator feet for adjusting 
the image height.
1. Locate the adjustable foot you wish to modify on the 
underside of the projector. 
2. Rotate the adjustable rings clockwise/anticlockwise to  lower or raise the projector. Repeat with the remaining feet 
as needed.
Tilt-Adjustment Feet
Tilt-Adjustment Ring 
						

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Installation
Adjusting the Projector’s Focus
To focus the image, rotate the focus ring until the image is clear.  
 SVGA series: The projector will focus at distances from 1.64 
to 18.05 feet (0.5 to 5.5 meters).
 WXGA series: The projector will focus at distances from 1.64 
to 16.40 feet (0.5 to 5.0 meters).
Focus Ring
Adjusting Projection Image Size
Hd
297.8
(756.3cm)
27.1 
(68.8cm) 54.1
(137.5cm) 135.3
(343.8cm) 189.5
(481.3cm) 243.6
(618.8cm)
1.64 (0.50m)
18.05(5.50m) 14.76(4.50m) 11.48(3.50m)
8.20(2.50m) 3.28(1.00m)
Width
Height
Diagonal
 SVGA series: Projection Image Size from 27.3” to 300.0” 
(0.7 to 7.6 meters).
 WXGA series: Projection Image Size from 34.0” to 322.0” 
(0.8 to 8.2 meters).
SVGA  
						

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Installation
 This table is for user’s reference only.
Screen
(Diagonal)27.1” (68.8cm) 54.1” (137.5cm) 135.3” (343.8cm) 189.5” (481.3cm) 243.6” (618.8cm)297.8” (756.3cm)
Screen
Size (WxH)21.7” x 16.3”
55.0 x 41.3cm 43.3” x 32.5”
110.0 x 82.5cm 108.2” x 81.2”
275.0 x 206.3cm 151.6” x 113.7”
385.0 x 288.8cm 194.9” x 146.2”
495.0 x 371.3cm 238.2” x 178.7”
605.0 x 453.8cm
Hd2.44” (6.2cm) 4.87” (12.4cm) 12.18” (30.9cm)17.06” (43.3cm)21.92” (55.7cm) 26.80” (68.1cm)
Distance1.64’ (0.50m)3.28’ (1.00m) 8.20’ (2.50m)11.48’ (3.50m)14.76’ (4.50m) 18.05’ (5.5m)
WXGA
 This table is for user’s reference only.
Screen
(Diagonal)32.2” (81.9cm) 64.5” (163.8cm) 161.2” (409.5cm) 225.7” (573.2cm) 290.2” (737.0cm)322.4” (818.9cm)
Screen
Size (WxH)27.3” x 17.1”
69.5 x 43.4cm 54.7” x 34.2”
138.9 x 86.8cm 136.7” x 85.4”
347.3 x 217.0cm 191.4” x 119.6”
486.1 x 303.8cm 246.1” x 153.8”
625.0 x 390.6cm 273.4” x 170.9”
694.4 x 434.0cm
Hd2.12” (5.4cm) 4.24” (10.8cm) 10.59” (26.9cm)14.83” (37.7cm)19.07” (48.4cm) 21.19” (53.8cm)
Distance1.64’ (0.50m)3.28’ (1.00m) 8.20’ (2.50m)11.48’ (3.50m)14.76’ (4.50m)16.40’ (5.00m)
Hd
322.4
(818.9cm)
32.2 
(81.9cm) 64.5
(163.8cm) 161.2
(409.5cm) 225.7
(573.2cm) 290.2
(737.0cm)
1.64 (0.50m)
16.40(5.00m) 14.76(4.50m) 11.48(3.50m)
8.20(2.50m) 3.28(1.00m)
Width
Height
Diagonal 
						

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English
User Controls
Using the Control Panel
POWERRefer to the “Power On/Off the Projector” section on 
pages 13-14.
RE-SYNCAutomatically synchronize the projector to the input 
source.
EnterConfirm your item selection.
SOURCEPress “SOURCE” to select an input signal.
MenuPress “Menu” to launch the on-screen display 
(OSD) menu. To exit OSD, Press “Menu” again.
AV MUTEMomentarily turns off/on the audio and video.
Four Directional 
Select KeysUse     to select items or make adjust-
ments to your selection.
Keystone Use   to adjust image distortion caused 
by tilting the projector. (
±40 degrees)
Lamp LEDIndicate the projector’s lamp status.
Temp LED
Indicate the projector’s temperature status. 
ON/STAND-
BY LED
Indicate the projector’s status.
Control Panel
Control Panel & Remote Control
POWER      
						

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User Controls
Remote Control
Using the Remote Control
Power
  Refer to the “Power On/Off the Projector” 
section on pages 13-14.
Contrast Adjust the contrast of the image. (For SVGA 
only)
L ButtonNo function.
R ButtonNo function.
Page +No function.
Page -No function.
Enter  Confirm your item selection.
SourcePress “Source” to select an input signal.
Re-SYNC  Automatically synchronizes the projector to 
the input source.
Four Directional 
Select KeysUse     to select items or make 
adjustments to your selection.
Keystone +/-Adjust image distortion caused by tilting the 
projector.
Volume +/-Adjust to increase / decrease the volume.
Brightness  Adjust the brightness of the image.
Menu
Press “Menu” to launch the on-screen 
display (OSD) menu. To exit OSD, press 
“Menu” again.
Overscan 
Mask off a few pixels on each edge of the
image to be displayed. Use the function
to adjust if image source happens to have
noise near any edge of the display image.
HDMI
Overscan
Contrast
Overscan
SVGA
WXGA     
						

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English
User Controls
Using the Remote Control
HDMIPress “HDMI” to choose HDMI source. (For 
WXGA only)
FreezePress “Freeze” to pause the screen image.  
Press this button again to unlock.
AV muteMomentarily turns off/on the audio and 
video.
S-Video Press “S-Video” to choose S-Video source.
VGAPress “VGA” to choose VGA sources.
VideoPress “Video” to choose Composite video 
source.