Optoma Tx785 Projector User Manual

English1
The  screen  of  the  Notebook  or  PowerBook  computer 
is not displaying your presentation
4 If you are using a Notebook:Some Notebooks 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
4 Use Phase  to correct it. See page 42 for more information.
4 Change the monitor color setting on your computer.
Appendices 

English
Image has vertical flickering bar4
  Use  Frequency  to  make  an  adjustment.  See  page  42  for  more 
information.
4 Check and reconfigure the display mode of your graphic card  to make it compatible with the projector.
Image is out of focus
4
 Make sure the lens cap is removed.
4 Adjusts the Focus Ring on the projector lens.
4 Make sure the projection screen is between the required  distances from the projector. See pages 24-25 for more  
information.
The image is stretched when...

English
Image has slanted sides
4 If possible, reposition the projector so that it is centered on the screen and below the bottom of the screen.
4  Press  [Keystone  +/-]  on  the  remote  control  until  the  sides  are vertical.
Image is reversed
4
 Select Setup | Projection  from the OSD and adjust the  
projection direction.
Intermission Problems
The projector stops responding to all controls
4
 If possible, turn off the projector, then unplug the power cord and wait at least 60 seconds...

English
HDMI Q & A
What  is  the  difference  between  a  “Standard”  HDMI 
cable and a “High-Speed” HDMI cable?
Recently, HDMI Licensing, LLC announced that cables would be tested as 
Standard or High-Speed cables.
4  Standard  (or  “category  1”)  HDMI  cables  have  been  tested  to perform  at  speeds  of  75Mhz  or  up  to  2.25Gbps,  which  is  the 
equivalent of a 720p/1080i signal.
4 High Speed (or “category 2”) HDMI cables have been tested to perform at speeds of 340Mhz or up to...

English
Projector Status Indication
Message
Power LED Power LED Temp LED Lamp LED 
(Blue) (Amber) (Red) (Red)
Standby State  
(Input power cord)
Standby State  
(Burn in Mode)Flashing
Power on with 
OSD (Press power 
button) 
* 
Power on without 
OSD 
Over Temperature
Fan FailFlashing
Lamp error 
Power off 
(Cooling)
*  Power  LED  will  be  ON  when  OSD  appears  and  OFF  when  OSD 
disappears.
Steady light  �No light �
The digit represents the number of led blinks. 
Appendices  

English
LED Error Code Messages
Error Code Message
Power LED Lamp LED 
(Blink) (Blink)
T1 temperature over temperature 30
Thermal Break 40
G794 fail 44
T1 fail 45
Lamp error 50
Ballast Over Temperature 51
Ballast shot circuit in output detected 5 2
End of lamp lift detected 53
Ballast lamp did not ignite 54
Lamp  extinguished  during  normal  opera-
tion 5
5
Lamp extinguished during run-up phase 5 6
Fan1 error (Lamp Fan) 61
Fan2 error (Ballast Fan) 62
Fan3 error (Burner Fan) 63
Fan4 error...

English
Message Reminders4
 Replacing the lamp:
4 Out of range: (see the following for more information)
Remote Control Problems
If the remote control does not work
4 Check the operating angle for the remote control is  approximately ±15°.
4 Make sure there are no obstructions between the remote control and the projector. Move to within 7m (23 ft) of the projector.
4 Make sure the batteries are inserted correctly.
4 Replace weak batteries in the remote control.
Appendices 

English
Audio Problems
There is no sound
4 Adjust the volume on the remote control. 
4 Adjust the volume of the audio source.
4 Check the audio cable connection.
4 Test the source audio output with other speakers.
4 Have the projector serviced.
The sound is distorted4
 Check the audio cable connection.
4 Test the source audio output with other speakers.
4 Have the projector serviced.
Appendices 

English
Replacing the Lamp
The projection lamp should be replaced when it burns out. It should 
only  be  replaced  with  a  certified  replacement  part,  which  you  can  
order from your local dealer.
Important:
4 The lamp contains a certain amount of mercury and should be  disposed of according to local ordinance regulations.
4  Avoid  touching  the  glass  surface  of  the  new  lamp,  doing  so may shorten its operation life.
Warning:
4 Be sure to turn off and unplug the projector at...

English0
4
1. Switch off the power to the projector by pressing the Power button.
2. Allow the projector to cool down at least 30 minutes. 
3. Disconnect the power cord.
4. Unlock the lamp cover.
5. Pull up and remove the cover.
6. Use a screwdriver to remove the screws from the lamp module.
7. Pull out the lamp module.
To replace the lamp module, reverse the previous steps.
After replacing the lamp, the lamp hours counter must be reset. See  
page 54 for more information.
Appendices