Vivitek Projector DH91x Series 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.  Focus ring Focuses the projected image 
16 
4.  Zoom ring Enlarges the projected image 
5.  Function keys See Top view—OnJscreen Display (OSD) buttons 
and LEDsK 3 
 Important: 
Ventilation openings on the projector allow for good air circulation, which keeps the projector lamp 
cool. Do not obstruct any of the ventilation openings.    

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Top view—On-screen Display (OSD) buttons and LEDs 
 
ITEM LABEL DESCRIPTION SEE PAGE 
1.  MENU Opens and exits OSD menus 
17 
2.   
Navigates in the OSD 
Quick Menu – For Keystone 
3.  SOURCE Enter the Source menu 
4.   Navigates and changes settings in the OSD 17 
5.   Enter or confirm highlighted OSD menu item 
6.  AUTO Optimizes image size, position, and resolution 
7.   Navigates and changes settings in the OSD 
17 
8.   
Navigates in the OSD 
Quick Menu – For Keystone 
9.   Turns the...

— 4 — 
 Rear view 
 
ITEM LABEL DESCRIPTION SEE PAGE 
1.  AC IN Connect the POWER cable 11 
2.  VGA IN Connect the RGB cable from a computer 
3.  VGA IN  Connect the RGB cable from a computer 
4.   (USB) Connect the USB cable from a computer  
5.  VGA OUT Connect the RGB cable to a display 
6.  RS-232C Connect RS-232 serial port cable for remote control 
7.  HDMI2 Connect the HDMI cable from a HDMI device 
8.  HDMI1/MHL 
Connect the HDMI cable from a HDMI device 
Connect the MHL cable from a...

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Note: 
 To use this feature, you must plug in the connector before turn on/off the projector. 
 Screen controllers are supplied and supported by screen manufacturers. 
 Do not use this jack for anything other than intended use. 
 
Note: 
If your video equipment has both S-VIDEO and RCA jacks (composite video) connect to the  
S-VIDEO connector. S-VIDEO provides a better quality signal. 
 
 Warning: 
As a safety precaution, disconnect all power to the projector and connecting devices before...

— 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 12 mm (0.47 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 — 
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.      

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SETUP AND OPERATION 
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....