Vivitek Projector DX977 User Manual

–
53  – Using the Kensington Security Slot & Using the Security Bar 
Using the Kensington Security Slot 
If you are concerned about security, attach the projector to a permanent object with the Kensington 
slot and a security cable.  
Note:  
Contact your vendor
 for details on purchasing a suitable Kensington security cable.  The security lock corresponds to Kensington’s MicroSaver Security System. If you have any 
comment, contact: Kensington, 2853 Campus Drive, San Mateo, CA 94403, U.S.A. Tel: 800...

— 54 — 
TROUBLESHOOTING 
Common problems and solutions 
These guidelines provide tips to deal with problems you may encounter while using the projector. If 
the problem remains unsolved, contact your dealer for assistance. 
Often after time spent troubleshooting, the problem is traced to something as simple as a loose 
connection. Check the following before proceeding to the problem-specific solutions. 
 Use some other electrical device to confirm that the electrical outlet is working. 
 Ensure the...

– 55 – 
LED Error Messages 
ERROR CODE MESSAGES POWER LED 
BLUE 
TEMP LED 
RED 
LAMP LED 
RED 
Lamp Ready ON OFF OFF 
Start ON OFF OFF 
Cooling ON OFF OFF 
Over Temperature OFF ON OFF 
T1 error 3 blinks OFF 1 blinks 
Thermal Break Sensor error 4 blinks OFF OFF 
G794 error 4 blinks OFF 4 blinks 
Lamp fail 5 blinks OFF OFF 
Ballast temp over 5 blinks OFF 1 blinks 
Ballast circuit short 5 blinks OFF 2 blinks 
Lamp End of lamp life detected 5 blinks OFF 3 blinks 
Lamp did not ignite 5 blinks OFF 4 blinks...

— 56 — 
2. Press the Auto button on the remote control. 
3. Ensure the projector-to-screen distance is within the 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 to correct the problem. 
Problem: The image is reversed  
Check the Projection setting on the Settings 1 menu of the OSD. 
Problem:...

– 57 – 
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. 
Having the Projector Serviced 
If you are unable to solve the problem, you should...

— 58 — 
HDMI Q & A 
Q. 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.  
˙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.  
˙High Speed (or “category 2”) HDMI cables have been tested to perform at speeds of 340Mhz 
or up to 10.2Gbps, which is the highest...

– 59 – 
SPECIFICATIONS 
Specifications 
Model DX977 DH976 DU978 
Display type DMD, 0.7 XGA, Type A DMD, 0.65 1080p, S600 DMD, 0.67 WUXGA, Type A 
Resolution XGA (1024 x 768) 1080P (1920 x 1080) WUXGA(1920× 1200) 
Projection distance 1.2 - 10 m 
Projection screen size 27.6~344.6 25.9~324.9 26.6~334 
Projection lens Manual Zoom 
Zoom ratio 1.5x 
Offset 
(Lens Shift Offset) 112%(109.5%~120%) 115%(111.2%~130.8%) 122%(118.9%~131.0%) 
Vertical keystone 
correction +/- 40 Degree 
Projection methods Front, Rear,...

— 60 — 
Projection Distance vs. Projection Size 
 
Projection Distance and Size Table 
DX977 
DIAGONA
L LENGTH 
SCREEN SIZE (INCH) PROJECTION DISTANCE (MM) OFFSET 
(A) WIDTH HHEGHT WIDE TELE 
(INCH) (INCH) (CM) (INCH) (CM) (INCH) (CM) (INCH) (CM) (MM) 
30 24.0 61.0 18.0 45.7 -- -- 5.1 130.6 54.9 
40 32.0 81.3 24.0 61.0 -- -- 6.9 174.1 73.2 
60 48.0 121.9 36.0 91.4 6.9 174.1 10.3 261.2 109.7 
80 64.0 162.6 48.0 121.9 9.1 232.1 13.7 348.2 146.3 
100 80.0 203.2 60.0 152.4 11.4 290.2 17.1 435.3 182.9 
120...

– 61 – 
DH976 
DIAGONA
L LENGTH 
SCREEN SIZE (INCH) PROJECTION DISTANCE (MM) OFFSET 
(A) WIDTH HHEGHT WIDE TELE 
(INCH) (INCH) (CM) (INCH) (CM) (INCH) (CM) (INCH) (CM) (MM) 
30 26.1  66.3  14.7  37.3  --  --  5.5  138.8  56.0  
40 34.9  88.6  19.6  49.8  4.9  123.8  7.3  185.1  74.7  
60 52.3  132.8  29.4  74.7  7.3  185.7  10.9  277.6  112.1  
80 69.7  177.0  39.2  99.6  9.7  247.6  14.6  370.2  149.4  
100 87.2  221.5  49.0  124.5  12.2  309.5  18.2  462.7  186.8  
120 104.6  265.7  58.8  149.4  14.6...

— 62 — 
Timing Mode Table 
SIGNAL  RESOLUTION  H-SYNC 
( KHZ ) 
V-SYNC 
( HZ ) 
COMPOSITE 
S_VIDEO COMPONENT RGB 
(ANALOG) 
DP/HDMI 
(DIGITAL) 
NTSC － 15.734 60 ○ － － － 
PAL/SECAM － 15.625 50 ○ － － － 
VESA 
720 x 400 31.5 70.1 － － ○ ○ 
720 x 400 37.9 85.04 － － ○ ○ 
640 x 480 31.5 60.0 － － ○ ○ 
640 x 480 37.9 72.8 － － ○ ○ 
640 x 480 37.5 75.0 － － ○ ○ 
640 x 480 43.3 85.0 － － ○ ○ 
800 x 600 35.2 56.3 － － ○ ○ 
800 x 600 37.9 60.3 － － ○ ○ 
800 x 600 46.9 75.0 － － ○ ○ 
800 x 600 48.1 72.2 － － ○ ○ 
800 x 600...