Optoma Tx774 Projector User Manual

 
Appendices 
Pull firmly on the 
module handle to re-
move the lamp module 
(D ) 
 
D
 
5. 
Reverse steps 1 to 5 
to install the new lamp 
module.  
6. 
 
41  

 
Appendices 
Resetting the Lamp 
After replacing the lamp, you should reset the lamp  hour counter to zero. Refer to the following: 
1. Press the Menu button to open 
the Image menu. 
2. Press the cursor  button  to 
move to the  Management  menu. 
3. Press the cursor  button
 to 
move down to  Status. 
4. Press the cursor  or Enter 
button to enter Status menu 
5. Press the cursor  button  to 
move down to  Lamp Hour Reset.   
Press the cursor 
 or Enter 
button.   
A message screen appears. 
6. Press...

 
Appendices 
Cleaning the Projector 
Cleaning the projector to remove dust and grime will help ensure trouble-free operation.  
Warning: 
1.  Be sure to turn off and unplug the projector at least an hour before cleaning. Failure to do so 
could result in a severe burn. 
2. Use only a dampened cloth when cleaning. Do not allow water to enter the ventilation openings 
on the projector.  
3. If a little water gets into the projector interior  while cleaning, leave unplugged in a well-ventilated 
room for...

 
Appendices 
44 
Common problems and solutions 
These guidelines provide tips to deal with problem s you may encounter while using the projector. If 
the problem remains unsolved, cont act your dealer for assistance. 
Often after time spent troubleshooting, the problem is  traced to something as simple as a loose con-
nection. Check the following before proceedi ng to the problem-specific solutions. 
• Use some other electrical device to confirm that the electrical outlet is working. 
• Ensure the...

 
Appendices 
45 
LED Error Messages 
ERROR CODE MESSAGE POWER LED/FLASHES READY LED/FLASHES 
Lamp usage task created error 2 1 
Environment usage task created error 2 2 
Thermal break status error 3 0 
T1 temperature over temperature 3 1 
T1 sensor status fail 4 1 
Lamp lit error 5 1 
Ballast SCI error 5 2 
Ballast UART error 5 3 
Fan1 error (Lamp) 6 1 
Fan2 error (Ballast) 6 2 
Fan3 error (Burner) 6 3 
Fan4 error (Power) 6 4 
Lamp door sensor detect high 7 0 
DMD error 8 0 
Color wheel error 9 0 
  

 
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46 
Image Problems 
Problem: No image appears on the screen 
1.  Verify the settings on your notebook or desktop PC. 
2. Turn off all equipment and power up again in the correct order. 
Problem: The image is blurred  
1. Adjust the  Focus on the projector. 
2. Press the  Auto button on the remote control or projector. 
3. Ensure the projector-to-screen distance is within the 10-meter (33-feet) specified range. 
4. Check that the projector lens is clean. 
Problem: The image is wider at the...

 
Appendices 
47 
Remote Control Problems 
Problem: The projector does not respond to the remote control  
1.  Direct the remote control towards remote sensor on the projector.  
2. Ensure the path between remote and sensor is not obstructed. 
3. Turn off any fluorescent lights in the room. 
4. Check the battery polarity. 
5. Replace the batteries. 
6. Turn off other Infrared-enabled devices in the vicinity. 
7. Have the remote control serviced. 
Audio Problems 
Problem: There is no sound 
1. Adjust the...

 
Appendices 
48 
Having the Projector Serviced 
If you are unable to solve the problem, you should have the projector serviced. Pack the projector in 
the original carton. Include a description of the problem and a checklist of  the steps you took when 
trying to fix the problem--the information may be useful to service personnel.  
Optoma Global Offices 
For service or support, please contact your local office. 
USA 
715 Sycamore Drive  
Milpitas, CA 95035, USA  
Tel: +1-408-383-3700 
Fax:...

 
Specifications 
Specifications 
Projection Distance V.S. Projection Size 
A
B
C D
Le cnatsiD  noitcejorP   
 
Anchura de pantalla 
Altura de pantalla 
Distancia de proyección 
Max. Screen Size 1.8 Min. Screen Size(Tele) 2.1 
Projection Distance  L Diagonal Width A Height C Diagonal Width B Height D 
1.00 m 0.69 m 0.56 m 0.42 m 0.60 m 0.48 m 0.36 m 
3  27  21  16  23  18  14 
1.50 m 1.04 m 0.83 m 0.63 m 0.89 m 0.71 m 0.54 m 
4  41  32  24  35  28  21  
2.40 m 1.67 m 1.33 m 1.00 m 1.43 m 1.14 m 0.86 m...

 
Specifications 
50 
Timing Mode Table 
The projector can display several resolutions. The  following table outlines the resolutions that can be 
displayed by the projector. 
Signal Resolution Frequency H.
(KHz) 
Frequency V.
(Hz) Video Digital Analog
NTSC -- 15.734 60.0 Ο  -- -- 
PAL / SECAM -- 15.625 50.0 Ο -- -- 
640 x 350 37.9 85.1 -- Ο Ο 
720 x 400 31.5 70.0 -- Ο Ο 
720 x 400 37.9 85.0 -- Ο Ο 
640 x 480 31.5 60.0 -- Ο Ο 
640 x 480 37.9 72.8 -- Ο Ο 
640 x 480 37.5 75.0 -- Ο Ο 
640 x 480 43.3 85.0...