Vivitek Projector DX831 User Manual

— 2 — 
Views of Projector Parts  
Front-right View 
   
ITEM LABEL DESCRIPTION SEE PAGE 
1.  IR receiver Receive IR signal from remote control. 
2.  Lens Projection Lens. 
3.  Function keys See Top view—OnJscreen Display (OSD) 
buttons and LEDsK 3 
4.  Focus ring Focuses the projected image. 
16 
5.  Zoom ring Enlarges the projected image. 
 Important: 
Ventilation openings on the projector allow for good air circulation, which keeps the projector lamp 
cool. Do not obstruct any of the ventilation...

– 3 – 
Top view—On-screen Display (OSD) buttons and LEDs 
 
ITEM LABEL DESCRIPTION SEE PAGE 
1.  ▲ (Up cursor) / 
Keystone  
Navigates and changes settings in the OSa 
Quick Menu – For Keystone 
17 2.  MENU Opens and exits OSD menus 
3.  ◄ (Left cursorF Navigates and changes settings in the OSa 
4.  ▼ (Down cursor) / 
Keystone  
Navigates and changes settings in the OSa 
Quick Menu – For Keystone 
5.  ECO Enter the lamp mode menu 
6.  SOURCE Navigates and changes settings in the OSD 
Enter the Source...

— 4 — 
 Rear view 
 Warning: 
As a safety precaution, disconnect all power to the projector and connecting devices before making 
connections. 
 
 
ITEM LABEL DESCRIPTION SEE PAGE 
1.  AC IN Connect the POWER cable 11 
2.  RJ45 Connect a LAN cable from Ethernet 
3.  12V TRIGGER Connect the 12V OUT (Screen Trigger-- For screen controllers used) 
4.  HDMI 1 Connect the HDMI cable from a HDMI device 
5.  VIDEO Connect the COMPOSITE cable from a video device  
6.  HDMI 2 / MHL 
Connect the HDMI cable from a...

– 5 – 
13.  RS-232C Connect RS-232 serial port cable for remote control 
14.  MINI USB Connect the USB cable from a computer  (For service only) 
15.  AUDIO OUT Connect an AUDIO cable to audio amplifier 
16.  MIC Connect the Microphone for use 
17.  S-VIDEO Connect the S-VIDEO cable from a video device 
18.  USB POWER 
(5V/1.5A) Connect the USB cable for power supply. 
 
  

— 6 — 
Bottom view 
 
ITEM LABEL DESCRIPTION SEE PAGE 
1.  Ceiling support holes Contact your dealer for information on mounting the projector on a 
ceiling 
2.  Tilt adjustor  Rotate adjuster lever to adjust angle position.  15 
 
Note: 
When installing, ensure that you use only UL Listed ceiling mounts. 
For ceiling installations, use approved mounting hardware and M4 screws with a maximum screw 
depth of 6 mm (0.24 inch).  
The construction of the ceiling mount must be of a suitable shape and...

– 7 – 
Remote Control Parts 
 
Important: 
1. Avoid using the projector with bright fluorescent lighting turned on. Certain high-frequency 
fluorescent lights can disrupt remote control operation. 
 
2. Be sure nothing obstructs the path between the remote control and the projector. If the path 
between the remote control and the projector is obstructed, you can bounce the signal off certain 
reflective surfaces such as projector screens. 
 
3. The buttons and keys on the projector have the same...

— 8 — 
ITEM LABEL DESCRIPTION SEE PAGE 
1.  OFF Turns the projector off 
2.  PC Toggles the input sources for display between PC sources 
3.  Video/S-Video Toggles the input sources for display between Video and S-Video 
4.   
Navigates and changes settings in the OSD or MHL mode 
Keystone correction. 17 
5.  EXIT Goes back to previous OSD menu, exits and saves menu settings 
Goes back to previous page or exit programs in MHL mode 
6.   Enters and confirms settings in the OSD and MHL mode 17 
7....

– 9 – 
ITEM LABEL DESCRIPTION SEE PAGE 
32.  HDMI Toggles the input sources for display between HDMI sources 
33.  ON Turns the projector on 
 Caution: 
Use of controls, adjustments or performance of procedures other than those specified herein may 
result in hazardous laser light exposure. 
 
Note: 
Controlling your smart device with the remote control 
When the projector projects the contents from your MHL compatible smart device, you can use 
the remote control to control your smart device. 
To enter...

— 10 — 
SETUP AND OPERATION 
Inserting the Remote Control Batteries  
1.  Remove the battery compartment 
cover by sliding the cover in the 
direction of the arrow. 
 
2.  Insert the battery with the positive 
side facing up. 
 
3.  Replace the cover. 
 
 
Caution: 
1. Only use AAA batteries (Alkaline batteries are recommended). 
 
2. Dispose of used batteries according to local ordinance regulations.  
 
3. Remove the batteries when not using the projector for prolonged periods. 
     ！  

– 11 – 
Starting and Shutting down the Projector 
 
1.  Connect the power cord to the 
projector. Connect the other end to 
a wall outlet. 
The  POWER LED on the 
projector light. 
 
2.  Turn on the connected devices. 
3.  Ensure the POWER LED not a 
flashing. Then press the  POWER 
button to turn on the projector.  
 
The projector splash screen displays 
and connected devices are 
detected. 
 
See Setting an Access Password 
(Security Lock) on page 13 if 
security lock is enabled. 
 
4.  If more than...