Optoma Ep761 Projector User Manual

							
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Image Problems
 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 opened the lens door and the projector is 
switched on.
 Partial, scrolling or incorrectly displayed image
 Press “Re-Sync” on the remote control or control panel.
 If you are using a PC:
 For Windows 95, 98, 2000, XP:
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 SXGA+ (1400 x 1050). (*) 
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 fol-
lowing steps.
5.  Verify the resolution setting is lower than or equal to SXGA+ 
(1400 x 1050) resolution.
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.	
	
(See	pages	54-55	for	details)
	(*) The resolution XGA (1024 x 768) is recommended for computer signal. 
						

							
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 6.  Select the “Change” button under the “Monitor” tab.
  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 SXGA+ (1400 x 1050). (*)
 If you are using a Notebook:
  1.  First, follow the steps above to adjust resolution of the comput
-
er.
  2.  Press the toggle output settings. 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. 
Compaq    
[Fn]+[F4]
Dell    [Fn]+[F8]
Gateway  [Fn]+[F4]
IBM    [Fn]+[F7]
Mac Apple: System Preference  Display  Arrangement  Mirror display
Hewlett  [Fn]+[F4]Packard 
NEC    [Fn]+[F3]
Toshiba    [Fn]+[F5]
	(*) The resolution XGA (1024 x 768) is recommend for computer signal. 
						

							
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 Image is out of focus
 Make sure the lens door is opened.
 Adjusts the Focus Ring on the projector lens. 
 Make sure the projection screen is between the required dis-
tance 3.9 to 39.4 feet (1.2 to 12.0 meters) from the projector.  
See page 19.
 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 in 16:9 format on projector side.
If you play 4:3 format DVD title, please change the format as 4:3 
in projector OSD.
If the image is still stretched, you will also need to adjust the 
aspect ratio by referring to the following:
 Please setup the display format as 16:9 (wide) aspect ratio type 
on your DVD player.
 Image is too small or too large
 Adjust the Zoom Ring on the top of the projector.
 Move the projector closer to or further from the screen.
 Press [Menu] button on the remote control or projector panel, 
go to “Display  Format” and try the different settings.
 Image has slanted sides
 If possible, reposition the projector so that it is centered on the 
screen and below the bottom of the screen.
 Press [Keystone +/-] button on the remote control or [ / ] 
on the projector panel, until the sides are vertical on the remote 
control.
 Image is reversed
 Select “Setup  Projection” from the OSD and adjust the  
projection direction.
	Use of Keystone is not recommended. 
						

							
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Intermission Problems
 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.
 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 been replaced. To replace the 
lamp, follow the procedures in the “Replacing the Lamp” section 
on pages 47-48.
 
Projector Status Indication
 LED lighting message
Message
Power/Standby LEDTemp-LEDLamp-LED
(Green/Amber)(Red)(Red)
Standby State
(Input power cord)Amber
Power on (Warming)Flashing Green
Lamp lightingGreen
Error (Over Temp.)
Error (Fan fail)Flashing
(1sec. ON, 1sec. OFF)
Error (Lamp fail)
Steady light      No light   
						

							
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 Message Reminders
 
 Fan failed:
 
 Temperature warning:
 
 Replacing the lamp:
 
 Out of range: (refer to page 49)
   
						

							
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Remote Control Problems
 If the remote control does not work
 Check the operating angle for the remote control is approximately 
±22.5°.
 Make sure there are no obstructions between the remote  
control and the projector. Move to within 6 m (20 ft) of the  
projector.
 Make sure the batteries are inserted correctly.
 Replace weak batteries in the remote control. 
						

							
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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 risk of personal injury, do not drop the 
lamp module or touch the lamp bulb. The bulb may shatter and 
cause injury if it is dropped.
 Warning: If ceiling mounted, please use caution when opening 
the lamp access panel. It is recommended to wear safety glasses 
if changing the bulb when ceiling mounted. “Caution must be 
used to prevent any loose parts from falling out of projector.” 
						

							
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Lamp Replacement Procedure:
1.  Switch off the power to the projector by pressing the “Power/Standby” button.
2.  Allow the projector to cool down for at least 30 minutes.
3.  Disconnect the power cord.
4.  Press down and then pull the cover carefully. 
5.  Open the top cover. 
6.  Use a screwdriver to remove the 2 screws from the lamp module. 
7.  Pull up the lamp handle. 
8.  Remove the lamp module. 
To replace the lamp module, reverse the previous steps.
9.  Turn on the projector and use “Lamp Reset” after the lamp module is replaced.
Lamp Reset: (i)Press “Menu”  (ii)Select “Options”  (iii)Select 
“Lamp settings”  (iv)Select “Lamp reset  (v)Select “Yes”.
3
2
15
5
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	“*”compressed computer image.
Compatibility ModesCompatibility Modes
 Computer Compatibility
 Video Compatibility
NTSCM (3.58MHz), 4.43 MHz, 480i/p @60Hz
PALB, D, G, H, I, M, N, 576i/p @50Hz
SECAMB, D, G, K, K1, L
HDTV480p, 576p, 720p, 1080i (50/60 Hz)
ModeResolutionV-Sync (Hz) 
AnalogDigital
VGA640 x 35070, 8570, 85
VGA640 x 4008585
VGA640 x 48060, 72, 75, 8560, 72, 75, 85
VGA720 x 40070, 8570, 85
SVGA800 x 60056, 60, 72, 75, 8556, 60, 72, 75, 85
XGA1024 x 76860, 70, 75, 8560, 70, 75
* WXGA1280 x 72060, 70, 75, 8560, 70, 75, 85
* WXGA1280 x 76860, 70, 75, 8560, 70, 75, 85
* SXGA1280 x 102460, 7560
* SXGA+1400 x 10506060
MAC LC 13”640 x 48066.66***
MAC II 13”640 x 48066.68***
MAC 16”832 x 62474.55***
MAC 19”1024 x 76875***
* MAC1152 x 87075.06***
MAC G4640 x 4806060, 70
 i MAC DV1024 x 76875***
* i MAC DV1152 x 87075***
* i MAC DV1280 x 96075***
MAC G5800 x 60060, 72, 75, 8556, 60, 72, 75
MAC G51024 x 76860, 70, 75, 8560, 70, 75
* MAC G51280 x 72060, 75, 8560, 75
* MAC G51280 x 10246060
* MAC G51400 x 105060*** 
						

							
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RS232 Commands
Pin no.NameI/O (From Projec-tor Side
1TXDOUT
2RXDIN
3GND__
Pin no.Spec.
1R(RED)/Cr
2G(GREEN)/Y
3B(BLUE)/Cb
4GND
5GND
6GND
7GND
8GND
9DDC 5V
10GND
11GND
12DDC Date
13HD/CS
14VD
15DDC Clock
12345
678910
1112131415
12
3
RS232 ConnectorVGA-In Connector