Optoma Tx775 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 the cursor buttons in this 
order: 
; ; ; . 
The Status menu appears again 
showing the Lamp  Hours reset to 
zero. 
42  
						

							
 
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 several hours before using. 
4. If a lot of water gets into the projector inte rior when cleaning, have the projector serviced. 
Cleaning the Lens 
You can purchase optic lens cleaner from most camera stores . Refer to the following to clean the pro-
jector lens. 
1.  Apply a little optic lens cleaner to a clean soft cloth. (Do not apply the cleaner directly to 
the lens.) 
2.  Lightly wipe the lens in a circular motion. 
Caution: 
1. Do not use abrasive cleaners or solvents. 
2. To prevent discoloration  or fading, avoid getting cleaner on the projector case. 
Cleaning the Case 
Refer to the following to clean the projector case. 
1.  Wipe off dust with a clean dampened cloth. 
2.  Moisten the cloth with warm water and mild detergent (such as used to wash dishes), and 
then wipe the case. 
3.  Rinse all detergent from the cloth and wipe the projector again. 
Caution: 
To prevent discoloration or fading of the case, do not use abrasive  alcohol-based cleaners. 
Using the Kensington® Lock 
If you are concerned about security, 
attach the projector to a permanent 
object with the Kensington slot and a 
security cable.  
 
43  
						

							
 
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 projector is turned on. 
• Ensure all connections are securely attached.  
• Ensure the attached device is turned on. 
• Ensure a connected PC is not in suspend mode. 
• Ensure a connected notebook computer is configured for an external display. (This is usu-
ally done by pressing an Fn-key combination on the notebook.) 
Tips for Troubleshooting 
In each problem-specific section, tr y the steps in the order suggested. This may help you to solve the 
problem more quickly. 
Try to pin point the problem and thus  avoid replacing non-defective parts.  
For example, if you replace batteries and the problem remains, put the original batteries back and go 
to the next step.  
Keep a record of the steps you take when troubles hooting-the information may be useful when calling 
for technical support or for passing on to service personnel. 
  
						

							
 
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 
  
						

							
 
Appendices 
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 top or bottom (trapezoid effect)  
1. Position the projector so it is as perpendicular to the screen as possible.  
2. Use the Keystone button on the remote control or projector to correct the problem. 
Problem: The image is reversed or upside down 
Check the  Projection setting on the  Utility menu of the OSD. 
Problem: The image is streaked  
1. Set the  Frequency  and Tracking settings on the  Utility menu of the OSD to the default 
settings. 
2.  To ensure the problem is not caused by a connected PC’s video card, connect to another 
computer.  
Problem: The image is flat with no contrast  
Adjust the  Contrast setting on the Main menu of the OSD. 
Problem: The color of the projected image does not match the source imag\
e. 
Adjust the  Color Temperature  and Gamma settings on the Main menu of the OSD. 
Lamp Problems 
Problem: There is no light from the projector  
1. Check that the power cable is securely connected. 
2. Ensure the power source is good by te sting with another electrical device. 
3. Restart the projector in the correct order and check that the Power LED is green. 
4. If you have replaced the lamp recently,  try resetting the lamp connections.  
5. Replace the lamp module. 
6. Put the old lamp back in the projector and have the projector serviced. 
Problem: The lamp goes off 
1. Power surges can cause the lamp to turn off. Press the power button twice to turn off the 
projector. When the Ready LED is on, press the power button. 
2. Replace the lamp module. 
3. Put the old lamp back in the projector and have the projector serviced.  
						

							
 
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 volume on the remote control.  
2. Adjust the volume of the audio source. 
3. Check the audio cable connection. 
4. Test the source audio output with other speakers. 
5. Have the projector serviced. 
Problem: The sound is distorted  
1. Check the audio cable connection. 
2. Test the source audio output with other speakers. 
3. Have the projector serviced.  
						

							
 
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: +1-408-383-3702
 
www.optomausa.com  
Service: [email protected] 
Canada 
5630 Kennedy Road, 
Mississauga, ON, L4Z 2A9, Canada 
Tel: 905-882-4228 
Fax: 905-882-4229 
www.optoma.com
Europe 
42 Caxton Way, The Watford Business Park 
Watford, Hertfordshire, WD18 8QZ, UK 
Tel : +44 (0) 1923 691 800  
Fax: +44 (0) 1923 691 888 
www.optomaeurope.com
Service Tel: +44 (0)1923 691865  
Service: [email protected] 
 
Taiwan 
5F., No. 108, Minchiuan Rd.  
Shindian City, Taipei Taiwan 231 
Tel: +886-2-2218-2360 
Fax: +886-2-2218-2313 
www.optoma.com.tw 
Service: [email protected]
Hong Kong 
Rm. 2507, 25/F., China United Plaza, 
No. 1008 Tai Nan West St., Kowloon, H.K. 
Tel: +852-2396-8968 
Fax: +852-2370-1222 
www.optoma.com.hk
China 
5F, No. 1205, Kaixuan Rd.,  
Changning District, Shanghai, 200052, China 
Tel: +86-21-62947376 
Fax: +86-21-62947375 
www.optoma.com.cn
Latin America 
715 Sycamore Drive  
Milpitas, CA 95035, USA  
Tel: 408-383-3700 
Fax: 408-383-3702 
www.optoma.com.br
www.optoma.com.mx
  
						

							
 
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 
7  65  52  39  56  44  33  
2.80 m 1.94 m 1.56 m 1.17 m 1.67 m 1.33 m 1.00 m 
9  76  61  45  65  52  39  
3.20 m 2.22 m 1.78 m 1.33 m 1.90 m 1.52 m 1.14 m 
10  87  69  52  74  59  44  
3.60 m 2.50 m 2.00 m 1.50 m 2.14 m 1.71 m 1.29 m 
11  98  78  59  84  67  50  
4.00 m 2.78 m 2.22 m 1.67 m 2.38 m 1.90 m 1.43 m 
13  109  87  65  93  74  56  
4.40 m 3.06 m 2.44 m 1.83 m 2.62 m 2.10 m 1.57 m 
14  120  96  72  103  82  61  
4.80 m 3.33 m 2.67 m 2.00 m 2.86 m 2.29 m 1.71 m 
15  131  104  78  112  89  67  
5.20 m 3.61 m 2.89 m 2.17 m 3.10 m 2.48 m 1.86 m 
17  142  113  85  121  97  73  
5.60 m 3.89 m 3.11 m 2.33 m 3.33 m 2.67 m 2.00 m 
18  153  122  91  131  104  78  
7.00 m 4.86 m 3.89 m 2.92 m 4.17 m 3.33 m 2.50 m 
22  191  153  114  164  131  98  
10.00 m 6.94 m 5.56 m 4.17 m 5.95 m 4.76 m 3.57 m 
32  273  218  164  234  187  140  
Shaded rows are equivalent meas urement in feet and inches 
49  
						

							
 
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 -- Ο Ο 
800 x 600 37.9 60.3 -- Ο Ο 
800 x 600 46.9 75.0 -- Ο Ο 
800 x 600 48.1 72.2 -- Ο Ο 
800 x 600 53.7 85.1 -- Ο Ο 
1024 x 768 48.4 60.0 -- Ο Ο 
1024 x 768 56.5 70.1 -- Ο Ο 
1024 x 768 60.0 75.0 -- Ο Ο 
1024 x 768 68.7 85.0 -- Ο Ο 
1280 x 1024 64.0 60.0 -- Ο Ο 
VESA 
1600 x 1200 ** 75.0 60.0 -- -- Ο 
640 x 480 35.0 66.7 -- Ο Ο 
832 x 624 49.7 74.5 -- Ο Ο 
1024 x 768 60.2 74.9 -- Ο Ο 
Apple Macintosh 
1152 x 870 68.7 75.1 -- Ο Ο 
1920 x 1080 33.8 30.0 -- -- Ο 
1920 x 1080 28.1 25.0 -- -- Ο 
HDTV 
1280 x 720 45.0 60.0 -- -- Ο 
720 x 576 31.3 50.0 -- -- Ο SDTV 
720 x 480 31.5 60.0 -- -- Ο 
Ο:  Frequency supported   
--:  Frequency not supported 
  The native resolution is 1024 x 768. Resolution  other than native mode may be displayed with 
uneven size of text or lines. 
  UXGA resolution with half-sampling.