Optoma GT750E User manual

1English
Table of Contents ............................1
Usage Notice...................................2
Safety Information...............................2
Precautions.........................................3
Eye Safety Warnings ..........................5
Product Features ................................5
Introduction......................................6
Package Overview..............................6
Product Overview ...............................7
Main Unit.............................................. 7
Control Panel ....................................... 8
Input/Output Connections .................... 9
Remote Control.................................. 10
Installation ..................................... 11
Connecting the Projector ..................11
Connect to Computer/Notebook ........ 11
Connect to Video Sources ................. 12
Powering On/Off the Projector..........13
Powering On the Projector................. 13
Powering Off the Projector................. 14
Warning Indicator............................... 14
Adjusting the Projected Image..........15
Adjusting the Projector’s Height ........ 15
Adjusting the Projector’s Focus ......... 16
Adjusting Projection Image Size ........ 16
User Controls ................................18
Control Panel & Remote Control ......18
Control Panel ..................................... 18
Remote Control.................................. 19
On-screen Display Menus ................21
How to operate ................................. 21
Menu Tree.......................................... 22
IMAGE ............................................... 24
IMAGE | Advanced ............................ 26
DISPLAY............................................ 28
DISPLAY | 3D ................................... 30
SETUP............................................... 31
SETUP | Security ............................... 33
SETUP | Signal .................................. 35
SETUP | Audio Settings..................... 36
OPTIONS........................................... 37
OPTIONS | Advanced........................ 38
OPTIONS | Lamp Settings................. 39
Appendices....................................40
Troubleshooting ................................40
Replacing the lamp ...........................45
Compatibility Modes .........................47
Computer Compatibility ..................... 47
Video Compatibility ............................ 48
3D input Compatibility........................ 49
RS232 Commands and Protocol
Function List .....................................50
RS232 Pin Assignments .................... 50
RS232 Protocol Function List ............ 51
Ceiling Mount Installation..................54
Optoma Global Ofces .....................55
Regulation & Safety Notices .............57
Table of Contents

2
English
Usage Notice
Safety Information
The lightning ash with arrow head within an equilateral triangle is
intended to alert the user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may be of sufcient
magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert
the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DANGEROUS HIGH
VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE. DO NOT OPEN THE
CABINET. REFER SERVICING TO QUALIFIED PERSONNEL ONLY.
Class B emissions limits
This Class B digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Important Safety Instruction
1. Do not block any ventilation openings. To ensure reliable operation of
the projector and to protect from over heating, it is recommended to
install the projector in a location that does not block ventilation. As an
example, do not place the projector on a crowded coffee table, sofa,
bed, etc. Do not put the projector in an enclosure such as a book case
or a cabinet that restricts air ow.
2. Do not use the projector near water or moisture. To reduce the risk
of re and/or electric shock, do not expose the projector to rain or
moisture.
3. Do not install near heat sources such as radiators, heaters, stoves or
any other apparatus such as ampliers that emits heat.
4. Clean only with dry cloth.
5. Only use attachments/accessories specied by the manufacturer.
6. Do not use the unit if it has been physically damaged or abused.
Physical damage/abuse would be (but not limited to):
Unit has been dropped.
Power supply cord or plug has been damaged.
Liquid has been spilled on to the projector.
Projector has been exposed to rain or moisture.
Something has fallen in the projector or something is loose inside.
Do not attempt to service the unit yourself. Opening or removing covers
may expose you to dangerous voltages or other hazards. Please call
Optoma before you send the unit for repair.
7. Do not let objects or liquids enter the projector. They may touch
dangerous voltage points and short out parts that could result in re or
electric shock.
8. See projector enclosure for safety related markings.
9. The unit should only be repaired by appropriate service personnel.

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Usage Notice
Precautions
Please follow all warnings, precautions and
maintenance as recommended in this user’s
guide.
▀■Warning- Do not look into the projector’s lens when the lamp is
on. The bright light may hurt and damage your eyes.
▀■Warning- To reduce the risk of re or electric shock, do not
expose this projector to rain or moisture.
▀■Warning- Please do not open or disassemble the projector as
this may cause electric shock.
▀■Warning- When replacing the lamp, please allow the unit to
cool down. Follow instructions as described on pages
44-45.
▀■Warning- This projector will detect the life of the lamp itself.
Please be sure to change the lamp when it shows
warning messages.
▀■Warning- Reset the “Lamp Reset” function from the on-screen
display “OPTIONS | Lamp Settings” menu after
replacing the lamp module (refer to page 38).
▀■Warning- When switching the projector off, please ensure
the cooling cycle has been completed before
disconnecting power. Allow 90 seconds for the
projector to cool down.
▀■Warning- Do not use lens cap when projector is in operation.
▀■Warning- When the lamp is approaching the end of its lifetime,
the message “Lamp Warning: Lamp life exceeded.”
will show on the screen. Please contact your local
reseller or service center to change the lamp as soon
as possible.
▀■Warning- Do not look into or point the laser pointer on your
remote control into your or someone’s eyes. Laser
pointer can cause permanent damage to eyesight.

4
English
Usage Notice
Do:
Turn off and unplug the power plug from the AC outlet before
cleaning the product.
Use a soft dry cloth with mild detergent to clean the display
housing.
Disconnect the power plug from AC outlet if the product is
not being used for a long period of time.
Do not:
Block the slots and openings on the unit provided for
ventilation.
Use abrasive cleaners, waxes or solvents to clean the unit.
Use under the following conditions:
- In extremely hot, cold or humid environments.
 Ensure that the ambient room temperature is within
5 - 35°C.
 Relative Humidity is 5 - 35°C, 80% (Max.),
non-condensing.
- In areas susceptible to excessive dust and dirt.
- Near any appliance generating a strong magnetic eld.
- In direct sunlight.

5English
Usage Notice
Eye Safety Warnings
▀■Avoid staring/facing directly into the projector beam at all
times. Keep your back to the beam as much as possible.
▀■When projector is used in a classroom, adequately supervise
students when they are asked to point out something on the
screen.
▀■In order to minimize the lamp power, use room blinds to
reduce ambient light levels.
Product Features
▀■WXGA (1280x800) Native resolution
▀■HD compatible – 1080p supported
▀■BrilliantColorTM Technology
▀■Security Bar and Kensington Lock
▀■RS232 control
▀■Rapid shutdown
▀■ Built-in speaker

6
English
Introduction
Documentation :

User’s Manual

Warranty Card

Quick Start Card

WEEE Card
(for EMEA only)
Due to different
applications in
each Country,
some regions
may have
different
accessories.
Power Cord 1.8m
IR Remote Control
Package Overview
Unpack and inspect the box contents to ensure
all parts listed below are in the box. If something
is missing, please contact your nearest customer
service center.
2 × AAA Batteries
Projector with lens cap VGA Cable 1.8m
VGA/RCA Adaptor

7English
Introduction
Product Overview
1. Control Panel
2. Focus Ring
3. Lens
4. IR Receivers
5. Tilt-Adjustment Feet
6. Security Bar
7. Input / Output
Connections
8. Power Socket
6
75
2
5
43
1
4
8
Main Unit

8
English
Introduction
POWER
8
62 4 53
711
10
9
112
1. AV Mute
2. Menu
3. Source
4. Enter
5. Re-Sync
6. Power
7. Keystone Correction
8. Four Directional Select Keys
9. On/Standby LED
10. Lamp LED
11. Temp LED
12. IR Receiver
Control Panel

9English
Introduction
VGA / YPbPr S-VIDEO VIDEO
3D SYNC
Out (5V)
AUDIO-OUT
RS-232
HDMI 1 HDMI 2
AUDIO-IN-RAUDIO-IN-L
Input/Output Connections
1. VGA/YPbPr/ Connector
(PC Analog Signal/Component Video Input/HDTV/YPbPr)
2. HDMI 1 Connector
3. HDMI 2 Connector
4. S-Video Input Connector
5. Composite Video Input Connector
6. Audio Output Connector (3.5mm Mini Jack)
7. 3D Sync Out (5V)
8. Power Socket
9. RS-232 Connector (9-pin)
10. Left RCA Audio Input Connector
11. Right RCA Audio Input Connector
12. KensingtonTM Lock Port
13. Security Bar
7542
9 12 138
1
10 11
3 6

10
English
Introduction
Remote Control
1. Power On
2. Power Off
3. 16:9
4. Native
5. Contrast
6. Brightness
7. Vol+/-
8. Enter
9. Re-Sync
10. VGA Source
11. Video Source
12. HDMI 2 Source
13. S-Video Source
14. HDMI 1 Source
15. Menu
16. Source
17. 3D
18. 3D format
19. Mode
20. LBX
21. 4:3-I
22. 4:3-II
23. 16:10
24. Four Directional Select
Keys
1
2
3
4
5
6
10
11
14
18
19
20
23
13
21
22
12
8
9
24
16
15
17
7
7

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

12
English
Installation
VGA / YPbPr S-VIDEO VIDEO
3D SYNC
Out (5V)
AUDIO-OUT
RS-232
HDMI 1 HDMI 2
AUDIO-IN-RAUDIO-IN-L
E62405SP
R
Connect to Video Sources
1....................................................................................................Power Cord
2..................................................................................................*HDMI Cable
3......................................................................................... VGA/RCA Adaptor
4.............................................................................................. *S-Video Cable
5................................................................................*Composite Video Cable
6.................................................................................*Audio Cable Jack/RCA
7................................................................................................ *Emitter cable
Composite Video Output
DVD Player, Set-top Box,
HDTV receiver
S-Video Output
1
3 2
5
6
Due to the
difference in
applications
for each
country, some
regions may
have different
accessories.
(*) Optional
accessory
Audio Output
4
6
7

13 English
Installation
Powering On/Off the Projector
Turn on the
projector rst 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 rst 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 Cap
1
Power
2

14
English
Installation

Contact the
nearest service
center if the
projector displays
these symptoms.
See pages
54-55 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
ashes amber.
 “TEMP” LED indicator is lit red and if “On/Standby”
indicator ashes amber. This indicates the projector has
overheated. Under normal conditions, the projector can be
switched back on.
 “TEMP” LED indicator ashes red and if “On/Standby”
indicator ashes 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 conrm 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.

15 English
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 ring clockwise to raise the projector
or counter clockwise to lower it. Repeat with the remaining
feet as needed.
Tilt-Adjustment Feet
Tilt-Adjustment Ring

16
English
Installation
Adjusting the Projector’s Focus
To focus the image, rotate the focus ring until the image is clear.
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
WXGA series: Projection Image Size from 34.0” to 322.0”
(0.8 to 8.2 meters).
Width
Height
Diagonal
Top View
Side View
Projection Distance (D)
Projection Distance (D)
Screen
Screen
Screen (W)
Screen (H)
Offset (Hd)

17 English
Installation
This table is for user’s reference only.
WXGA
Diagonal length
(inch) size of
16:10 Screen
Screen Size W x H Projection Distance (D)
Offset (Hd)
(m) (inch) (m) (feet)
Width Height Width Height wide wide (m) (feet)
36.30 0.78 0.49 30.78 19.24 0.56 - 0.06 0.20
44.00 0.95 0.59 37.31 23.32 0.68 2.24 0.07 0.24
60.00 1.29 0.81 50.87 31.80 0.93 3.05 0.10 0.33
70.00 1.51 0.94 59.35 37.10 1.09 3.56 0.12 0.38
80.00 1.72 1.08 67.83 42.40 1.24 4.07 0.13 0.44
90.00 1.94 1.21 76.31 47.69 1.40 4.58 0.15 0.49
100.00 2.15 1.35 84.79 52.99 1.55 5.09 0.17 0.55
120.00 2.58 1.62 101.75 63.59 1.86 6.10 0.20 0.66
150.00 3.23 2.02 127.19 79.49 2.33 7.63 0.25 0.82
180.00 3.88 2.42 152.62 95.39 2.79 9.16 0.30 0.99
250.00 5.38 3.37 211.98 132.49 3.88 12.72 0.42 1.37
302.00 6.50 4.07 256.07 160.04 4.68 15.36 0.50 1.65
362.00 7.80 4.87 306.94 191.84 5.61 18.41 0.60 1.98

18
English
User Controls
Using the Control Panel
POWER Refer to the “Power On/Off the Projector” section on
pages 13-14.
RE-SYNC Automatically synchronize the projector to the input
source.
Enter Conrm your item selection.
SOURCE Press “SOURCE” to select an input signal.
Menu Press “Menu” to launch the on-screen display
(OSD) menu. To exit OSD, Press “Menu” again.
AV MUTE Momentarily turns off/on the audio and video.
Four Directional
Select Keys
Use to select items or make adjust-
ments to your selection.
Keystone Use to adjust image distortion caused
by tilting the projector. (±40 degrees)
Lamp LED Indicate 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

19 English
User Controls
Remote Control
Using the Remote Control
Power On Refer to the “Power On” section on page 13.
Power Off Refer to the “Power On/Off the Projector”
section on page 14.
Mode Select the display mode from Cinema,
Bright, Photo, Reference and User.
4:3-I Scale the image at a 4:3-I (960x720) aspect
ratio.
4:3-II Scale the image at a 4:3-II (1066x800)
aspect ratio.
16:9 Scale the image at a 16:9 (1280x720) aspect
ratio.
16:10 Scale the image at a 16:10 (1280x800)
aspect ratio.
LBX
Enable the viewing of the letterboxed nonan-
amorphically enhanced movie at full screen
width. Part of the original image will be lost if
the image aspect ratio is less than 2.35:1.
Native The input source will be displayed without
scaling.
Brightness Adjust the brightness of the image.
Contrast Control the degree of difference between the
lightest and darkest parts of the picture.
3D Format For Broadcast 3D signals in “3D format”.
3D Press the “3D” to turn the 3D OSD menu on/
off.
Vol+ / Vol - Adjust to increase / decrease the volume.

20
English
User Controls
Using the Remote Control
Enter Conrm your item selection.
Source Press “Source” to select an input signal.
Re-sync Automatically synchronizes the projector
to the input source.
Menu Display or exit the on-screen display
menus for projector.
HDMI 1 Press “HDMI 1” to choose source from
HDMI 1 connector.
HDMI 2 Press “HDMI 2” to choose source from
HDMI 2 connector.
VGA Press “VGA” to choose source from
VGA/SCART/YPbPr connector.
S-Video Press “S-Video” to choose S-Video
source.
Video Press “Video” to choose Composite
video source.
Four
Directional
Select Keys
Use to select items or
make adjustments to your selection.