BENQ

DX819ST - Video projector BENQ - Free user manual and instructions

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Download the instructions for your Video projector in PDF format for free! Find your manual DX819ST - BENQ and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. DX819ST by BENQ.

USER MANUAL DX819ST BENQ

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Table of contents

Important safety instructions .... 3

Introduction...... 7

Projector features......7

Shipping contents 8

Projector exterior view......9

Controls and functions ......10

Positioning your projector....14

Choosing a location....14

Obtaining a preferred projected image size....15

Connection ......16

Connecting video source devices......17

Operation......18

Starting up the projector ....18

Adjusting the projected image .....19

Using the menus....21

Securing the projector....22

Switching input signal 24

Magnifying and searching for details ...25

Selecting the aspect ratio .....25

Optimizing the image ......27

Setting the presentation timer......30

Remote paging operations ....31

Freezing the image ....31

Hiding the image....32

Locking control keys ......32

Operating in a high altitude environment....32

Adjusting the sound....33

Using the test pattern ....33

Using the teaching templates...... 34

Shutting down the projector 35

Direct power off.... 35

Menu operation 36

Maintenance...... 46

Care of the projector.... 46

Lamp information 48

Troubleshooting 54

Specifications 55

Projector specifications.... 55

Dimensions 56

Ceiling mount installation.... 56

Wall mount installation.... 57

Timing chart.... 60

Warranty and Copyright information 64

Important safety instructions

Your projector is designed and tested to meet the latest standards for safety of information technology equipment. However, to ensure safe use of this product, it is important that you follow the instructions mentioned in this manual and marked on the product.

Safety Instructions

  1. Please read this manual before you operate your projector. Save it for future reference.

BENQ DX819ST - Safety Instructions - 1

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  1. Do not look straight at the projector lens during operation. The intense light beam may damage your eyes.

BENQ DX819ST - Safety Instructions - 2

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  1. Refer servicing to qualified service personnel.

BENQ DX819ST - Safety Instructions - 3

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  1. Always open the lens shutter (if any) or remove the lens cap (if any) when the projector lamp is on.

BENQ DX819ST - Safety Instructions - 4

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  1. In some countries, the line voltage is NOT stable. This projector is designed to operate safely within a mains voltage between 100 to 240 volts AC, but could fail if power cuts or surges of ±10 volts occur. In areas where the mains voltage may fluctuate or cut out, it is recommended that you connect your projector through a power stabilizer, surge protector or uninterruptible power supply (UPS).

BENQ DX819ST - Safety Instructions - 5

natural_image Cartoon illustration of a rectangular device connected to a power outlet with a fuse (no text or symbols)
  1. Do not block the projection lens with any objects when the projector is under operation as this could cause the objects to become heated and deformed or even cause a fire. To temporarily turn off the lamp, press ECO BLANK.

BENQ DX819ST - Safety Instructions - 6

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Safety Instructions (Continued)

  1. The lamp becomes extremely hot during operation. Allow the projector to cool for approximately 45 minutes prior to removing the lamp assembly for replacement.

BENQ DX819ST - Safety Instructions (Continued) - 1

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  1. Do not operate lamps beyond the rated lamp life. Excessive operation of lamps beyond the rated life could cause them to break on rare occasions.

BENQ DX819ST - Safety Instructions (Continued) - 2

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  1. Never replace the lamp assembly or any electronic components unless the projector is unplugged.

BENQ DX819ST - Safety Instructions (Continued) - 3

natural_image Cartoon illustration of a smiling projector with open circuit and power cord (no text or symbols)
  1. Do not place this product on an unstable cart, stand, or table. The product may fall, sustaining serious damage.

BENQ DX819ST - Safety Instructions (Continued) - 4

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II. Do not attempt to disassemble this projector. There are dangerous high voltages inside which may cause death if you should come into contact with live parts. The only user serviceable part is the lamp which has its own removable cover.

Under no circumstances should you ever undo or remove any other covers. Refer servicing only to suitably qualified professional service personnel.

BENQ DX819ST - Safety Instructions (Continued) - 5

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  1. When the projector is under operation, you may sense some heated air and odor from its ventilation grill. It is a normal phenomenon and not a product defect.

Safety Instructions (Continued)

  1. Do not place this projector in any of the following environments.

  2. Space that is poorly ventilated or confined. Allow at least 50 cm clearance from walls and free flow of air around the projector.

  3. Locations where temperatures may become excessively high, such as the inside of a car with all windows rolled up.
  4. Locations where excessive humidity, dust, or cigarette smoke may contaminate optical components, shorten the projector's life span and darken the image.

BENQ DX819ST - Safety Instructions (Continued) - 1

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  • Locations near fire alarms
  • Locations with an ambient temperature above 40^ C / 104^ F
  • Locations where the altitudes are higher than 3000 m (10000 feet).

BENQ DX819ST - Safety Instructions (Continued) - 2

text_image 3000 m (10000 feet) 0 m (0 feet)
  1. Do not block the ventilation holes.

  2. Do not place this projector on a blanket, bedding or any other soft surface.

  3. Do not cover this projector with a cloth or any other item.
  4. Do not place inflammables near the projector.

BENQ DX819ST - Safety Instructions (Continued) - 3

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If the ventilation holes are seriously obstructed, overheating inside the projector may result in a fire.

  1. Always place the projector on a level, horizontal surface during operation.

- Do not use if tilted at an angle of more than 10 degrees left to right, nor at angle of more than 15 degrees front to back. Using the projector when it is not fully horizontal may cause a malfunction of, or damage to, the lamp.

BENQ DX819ST - Safety Instructions (Continued) - 4

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  1. Do not stand the projector on end vertically. Doing so may cause the projector to fall over, causing injury or resulting in damage to the projector.

BENQ DX819ST - Safety Instructions (Continued) - 5

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Safety Instructions (Continued)

  1. Do not step on the projector or place any objects upon it. Besides probable physical damage to the projector, doing so may result in accidents and possible injury.

BENQ DX819ST - Safety Instructions (Continued) - 1

natural_image Simple line drawing of a steaming stack of books with a coffee bean, no text or symbols present
  1. Do not place liquids near or on the projector. Liquids spilled into the projector may cause it to fail. If the projector does become wet, disconnect it from the power supply's power outlet and call BenQ to have the projector serviced.

BENQ DX819ST - Safety Instructions (Continued) - 2

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  1. This product is capable of displaying inverted images for ceiling mount installation.

BENQ DX819ST - Safety Instructions (Continued) - 3

Use only BenQ's Ceiling Mount Kit for mounting the projector and ensure it is securely installed.

BENQ DX819ST - Safety Instructions (Continued) - 4

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  1. This apparatus must be earthed.

Ceiling mounting the projector

We want you to have a pleasant experience using your BenQ projector, so we need to bring this safety matter to your attention to prevent possible damage to person and property.

If you intend to mount your projector on the ceiling, we strongly recommend that you use a proper fitting BenQ projector ceiling mount kit and that you ensure it is securely and safely installed.

If you use a non-BenQ brand projector ceiling mount kit, there is a safety risk that the projector may fall from the ceiling due to an improper attachment through the use of the wrong gauge or length screws.

You can purchase a BenQ projector ceiling mount kit from the place you purchased your BenQ projector. BenQ recommends that you also purchase a separate Kensington lock compatible security cable and attach it securely to both the Kensington lock slot on the projector and the base of the ceiling mount bracket. This will perform the secondary role of restraining the projector should its attachment to the mounting bracket become loose.

BENQ DX819ST - Safety Instructions (Continued) - 5

Hg - Lamp contains mercury. Manage in accordance with local disposal laws. See www.lamprecycle.org.

Introduction

Projector features

The projector offers the following features.

• Less than 0.5W in standby condition

Less than 0.5W power consumption under standby mode.

• Network Control

Integrated RJ45 connector for wired network control allowing management of projector status from a computer using a web browser.

- Crestron RoomView® PJ Link and AMX supported

The projector supports Crestron eControl and RoomView, PJ Link and AMX allowing you to control and manage equipment from a remote computer via LAN connection.

• One-key auto-adjustment

Pressing AUTO on the keypad or remote control to show the best picture quality immediately.

- Brilliant color/VIDI

Provides truer, more vibrant colors in picture.

• Built-in 10W speaker(s)

Built-in 10W speaker(s) providing mixed mono audio when an audio input is connected

- Quick Cooling, Auto Power Off, Signal Power On, Direct Power On

Quick Cooling function speeds up the cooling process when turning off the projector. Auto Power Off function allows the projector to turn off automatically if no input signal is detected after a set period of time. Signal Power On function turns on your projector automatically once detecting the signal input and Direct Power On boots up the projector automatically when the power is connected.

- Instant Restart

Selectable Instant Restart function enables you to restart the projector immediately within 90 seconds after turning it off.

• 3D Function supported

Various 3D formats make the 3D function more flexible. By presenting the depth of the images, you can wear BenQ 3D glassed to enjoy the 3D movies, videos and sporting events in a more realistic way.

BENQ DX819ST - Projector features - 1

- The apparent brightness of the projected image will vary depending on the ambient lighting conditions, selected input signal contrast/brightness settings, and is directly proportional to projection distance.

- The lamp brightness will decline over time and may vary within the lamp manufacturers specifications. This is normal and expected behavior.

Shipping contents

Carefully unpack and verify that you have all of the items shown below. If any of these items are missing, please contact your place of purchase.

Standard accessories

BENQ DX819ST - Standard accessories - 1

The supplied accessories will be suitable for your region, and may differ from those illustrated.

*The warranty card is only supplied in some specific regions. Please consult your dealer for detailed information.

BENQ DX819ST - Standard accessories - 2

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BENQ DX819ST - Standard accessories - 3

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Projector Power cord VGA cable
BENQ DX819ST - Standard accessories - 4

BENQ DX819ST - Standard accessories - 5

BENQ DX819ST - Standard accessories - 6

Quick start guide User manual CD Warranty card*
BENQ DX819ST - Standard accessories - 7
Remote control with batteries

Optional accessories

I. Spare lamp kit
2. Ceiling mount kit
3. 3D glasses

  1. RS232 cable
  2. Carry bag

Projector exterior view

Front/upper side
BENQ DX819ST - Projector exterior view - 1

text_image 1 2 3 4 5 6 7 8 9 10 Belo

Rear/lower side
BENQ DX819ST - Projector exterior view - 2

text_image 12 314 15 6 17 18 9 20 1 11 24 23 22

BENQ DX819ST - Projector exterior view - 3

text_image Technical diagram of a device rear panel with numbered components and internal grid layout
  1. External control panel (See "Controls and functions" on page 10 for details.)
  2. Lamp cover
  3. Vent (heated air exhaust)
  4. Quick-release button
  5. Focus ring
  6. Vent (cool air intake)
  7. Speaker grill
  8. Front IR remote sensor
  9. Projection lens
  10. Lens cap
    II. AC power jack
  11. RS232 control port
  12. RJ45 LAN input jack
  13. USB mini B type port
  14. Rear IR remote sensor
  15. HDMI-input port
  16. RGB signal output jack
  17. RGB (PC)/Component Video (YPbPr/YCbCr) signal input jack
  18. S-Video input jack Video input jack
  19. Audio (L/R) input jacks
  20. Audio (1/2) input jacks Audio output jack
  21. Kensington anti-theft lock slot
  22. Rear adjuster foot
  23. Front adjuster foot
  24. Ceiling mount holes
  25. PointWrite module mounting hole

Controls and functions

Projector

BENQ DX819ST - Projector - 1

text_image LAMP TWP POWER AUTO AUTO RGB BLANK POWER

I. Focus ring

Adjusts the focus of the projected image.

2. LAMP indicator light

Indicates the status of the lamp. Lights up or flashes when the lamp has developed a problem.

3. MENU/EXIT

Turns on the On-Screen Display (OSD) menu. Goes back to previous OSD menu, exits and saves menu settings.

4. Left

BENQ DX819ST - Left - 1

Decreases the projector volume.

5. MODE/ENTER

Selects an available picture setup mode. Activates the selected On-Screen Display (OSD) menu item.

6. ECO BLANK

Used to hide the screen picture.

7. Keystone/Arrow keys (/ Up, ▲

▼ Down)

Manually corrects distorted images resulting from an angled projection.

8. TEMP (Temperature) warning light

Lights up red if the projector's temperature becomes too high.

9. POWER indicator light

Lights up or flashes when the projector is under operation.

10. AUTO

Automatically determines the best picture timings for the displayed image.

II. POWER

Toggles the projector between standby mode and on.

12. Right/

Increases the projector volume.

When the On-Screen Display (OSD) menu is activated, the #4, #7, and #12 keys are used as directional arrows to select the desired menu items and to make adjustments.

13. SOURCE

Displays the source selection bar.

Remote control

BENQ DX819ST - Remote control - 1

text_image 1 2 3 4 5 6 7 8 9 10 11 ON OFF COMPUTER 1 VIDEO HDMI COMPUTER 2 SVIDEO NETWORK MENU EXIT AUTO MODE ENTER SOURCE ECO BLANK LASEA + 0 + 8 + 0 ZOOM PAGE NETVOLI - 0 - 8 - 0 RHOOD APICE PRINT NETWORKS LISTING THAT Benoq PROMOTION

I. ON/ OFF

Toggles the projector between standby mode and on.

2. Source selection buttons (COMPUTER 1, COMPUTER 2, VIDEO, S-VIDEO, HDMI)

Selects an input source for display.

3. MENU/EXIT

Turns on the On-Screen Display (OSD) menu. Goes back to previous OSD menu, exits and saves menu settings.

4. Left

Decreases the projector volume.

5. ECO BLANK

Used to hide the screen picture.

6. Keystone/Arrow keys (/ Up, ▲ □ ▼ Down)

Manually corrects distorted images resulting from an angled projection.

7. LASER

Emits visible laser pointer light for presentation purposes.

8. ZOOM+/ZOOM-

Magnifies or reduces the projected picture size.

9. PAGE +/PAGE -

Operate your display software program (on a connected PC) which responds to page up/down commands (like Microsoft PowerPoint).

10. FREEZE

Freezes the projected image.

II. NETWORK SETTING

Displays the Network Settings OSD menu.

12. NETWORK

(No function.)

13. AUTO

Automatically determines the best picture timings for the displayed image.

14. Right/

BENQ DX819ST - Right/ - 1

Increases the projector volume.

When the On-Screen Display (OSD) menu is activated, the #4, #6, and #14 keys are used as directional arrows to select the desired menu items and to make adjustments.

15. MODE/ENTER

Selects an available picture setup mode.

Activates the selected On-Screen Display (OSD) menu item.

16. SOURCE

Displays the source selection bar.

17. MIC/VOL +/MIC/VOL -

(No function.)

18. ASPECT

Selects the display aspect ratio.

19. MUTE

Toggles projector audio between on and off.

20. SMART ECO

Displays the Lamp Mode menu for selecting a suitable lamp operating mode.

21. TEST

Displays the test pattern.

Remote control effective range

The remote control must be held at an angle within 30 degrees perpendicular to the projector's IR remote control sensor(s) to function correctly. The distance between the remote control and the sensor(s) should not exceed 8 meters (\~ 26 feet).

Make sure that there are no obstacles between the remote control and the IR sensor(s) on the projector that might obstruct the infra-red beam.

- Operating the projector from the front

- Operating the projector from the rear

BENQ DX819ST - Remote control effective range - 1

text_image Approx. ±30°

BENQ DX819ST - Remote control effective range - 2

text_image Approx. ±30°

BENQ DX819ST - Remote control effective range - 3

text_image Avoid Exposure Laser radiation is enclosed from this aperture

22. Numeric buttons

Enters numbers in network settings.

Operating the LASER pointer

The Laser Pointer is a presentation aid for professionals. It emits red colored light when you press it.

The laser beam is visible. It is necessary to press and hold LASER for continuous output.

BENQ DX819ST - Operating the LASER pointer - 1

Do not look into the laser light window or shine the laser light beam on yourself or others. See the warning messages on the back of the remote control prior to using it.

The laser pointer is not a toy. Parents should be mindful of the dangers of laser energy and keep this remote control out of the reach of children.

Replacing the remote control batteries

I. To open the battery cover, turn the remote control over to view its back, push on the finger grip on the cover and slide it up in the direction of the arrow as illustrated. The cover will slide off.

  1. Remove any existing batteries (if necessary) and install two AAA batteries observing the battery polarities as indicated in the base of the battery compartment. Positive (+) goes to positive and negative (-) goes to negative.

  2. Refit the cover by aligning it with the base and sliding it back down into position. Stop when it clicks into place.

BENQ DX819ST - Replacing the remote control batteries - 1

natural_image Diagram showing a hand holding a battery inside a device, before and after disassembly (no text or symbols present)

BENQ DX819ST - Replacing the remote control batteries - 2

- Avoid leaving the remote control and batteries in an excessive heat or humid environment like the kitchen, bathroom, sauna, sunroom or in a closed car.

- Replace only with the same or equivalent type recommended by the battery manufacturer.

- Dispose of the used batteries according to the manufacturer's instructions and local environment regulations for your region.

- Never throw the batteries into a fire. There may be danger of an explosion.

- If the batteries are dead or if you will not be using the remote control for an extended period of time, remove the batteries to avoid damage to the remote control from possible battery leakage.

Positioning your projector

Choosing a location

Your projector is designed to be installed in one of four possible installation locations:

I. Front Table

Select this location with the projector placed on the table in front of the screen. This is the most common way to position the projector for quick setup and portability.

BENQ DX819ST - Front Table - 1

natural_image Simple line drawing of a person observing a small object on a table, with a pointer and shadow (no text or symbols)

2. Front Ceiling

Select this location with the projector suspended upside-down from the ceiling in front of the screen.

Purchase the BenQ Projector Ceiling Mount Kit from your dealer to mount your projector on the ceiling.

Set Front Ceiling in the SYSTEM SETUP: Basic > Projector Installation menu after you turn the projector on.

BENQ DX819ST - Front Ceiling - 1

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3. Rear Ceiling

Select this location with the projector suspended upside-down from the ceiling behind the screen.

Note that a special rear projection screen and the BenQ Projector Ceiling Mount Kit are required for this installation location.

Set Rear Ceiling in the SYSTEM SETUP: Basic > Projector Installation menu after you turn the projector on.

BENQ DX819ST - Rear Ceiling - 1

natural_image Diagram showing a person observing a mechanical device with a triangular structure, no text or symbols present

4. Rear Table

Select this location with the projector placed on the table behind the screen.

Note that a special rear projection screen is required.

Set Rear Table in the SYSTEM SETUP: Basic > Projector Installation menu after you turn the projector on.

BENQ DX819ST - Rear Table - 1

natural_image Diagram showing a person observing a camera setup with a screen and pointer, no text or symbols present

Your room layout or personal preference will dictate which installation location you select. Take into consideration the size and position of your screen, the location of a suitable power outlet, as well as the location and distance between the projector and the rest of your equipment.

Obtaining a preferred projected image size

The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the projected image size.

Projection dimensions

Refer to "Dimensions" on page 56 for the center of lens dimensions of this projector before calculating the appropriate position.

BENQ DX819ST - Projection dimensions - 1

text_image (a) Screen Center of lens (c) (b)

The screen aspect ratio is 4:3 and the projected picture is in a 4:3 aspect ratio

(a) Screen size(b) Distance from screen (mm)(c) Vertical offset (mm)
DiagonalHeight (mm)Width (mm)
Inches mm
80 2032 1219 1626 988 183
100 2540 1524 2032 1235 229
120 3048 1829 2438 1481 274
150 3810 2286 3048 1852 343
180 4572 2743 3658 2222 411
200 5080 3048 4064 2469 457
220 5588 3353 4470 2716 503
240 6096 3658 4877 2963 549
270 6858 4115 5486 3333 617
300 7620 4572 6096 3704 686

For example, if you are using an 120-inch screen, the recommended projection distance is 1481 mm and the vertical offset is 274 mm.

If your measured projection distance is 2.5 m (2500 mm), the closest match in the "(b) Distance from screen" column is 2469 mm. Looking across this row shows that a 200" (about 5.1 m) screen is required.

BENQ DX819ST - Projection dimensions - 2

All measurements are approximate and may vary from the actual sizes.

BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location.

Connection

When connecting a signal source to the projector, be sure to:

I. Turn all equipment off before making any connections.
2. Use the correct signal cables for each source.
3. Ensure the cables are firmly inserted.

BENQ DX819ST - Connection - 1

  • In the connections shown below, some cables may not be included with the projector (see "Shipping contents" on page 8). They are commercially available from electronics stores.
  • The connection illustrations below are for reference only. The rear connecting jacks available on the projector vary with each projector model.

BENQ DX819ST - Connection - 2

flowchart
graph TD
    A["Monitor"] --> B["(VGA)"]
    A --> C["(DVI)"]
    B --> D["1"]
    B --> E["2"]
    C --> F["3"]
    C --> G["1"]
    C --> H["9"]
    D --> I["RS232"]
    E --> J["LAN"]
    F --> K["PEN-8"]
    G --> L["HOME"]
    H --> M["or"]
    I --> N["COMPUTER IN"]
    J --> O["COMPUTER IN"]
    K --> P["COMPUTER IN"]
    L --> Q["COMPUTER IN"]
    M --> R["COMPUTER IN"]
    N --> S["COMPUTER IN"]
    O --> T["COMPUTER IN"]
    P --> U["COMPUTER IN"]
    Q --> V["COMPUTER IN"]
    R --> W["COMPUTER IN"]
    S --> X["COMPUTER IN"]
    T --> Y["COMPUTER IN"]
    U --> Z["COMPUTER IN"]
    V --> AA["COMPUTER IN"]
    W --> AB["COMPUTER IN"]
    X --> AC["COMPUTER IN"]
    Y --> AD["COMPUTER IN"]
    Z --> AE["COMPUTER IN"]

I. VGA cable
2. VGA to DVI-A cable
3. USB cable
4. HDMI cable
5. Component Video to VGA (D-Sub) adapter cable

  1. Audio L/R cable
  2. S-Video cable
  3. Video cable
  4. Audio cable

BENQ DX819ST - Connection - 3

- Many notebooks do not turn on their external video ports when connected to a projector. Usually a key combo like FN + F3 or CRT/LCD key turns the external display on/off. Locate a function key labeled CRT/LCD or a function key with a monitor symbol on the notebook. Press FN and the labeled function key simultaneously. Refer to your notebook's documentation to find your notebook's key combination.

• The D-Sub output only works when an appropriate D-Sub input is made to the COMPUTER-I jack.

- If you wish to use this connection method when the projector is in standby mode, make sure the Monitor Out function is turned on in the SYSTEM SETUP: Advanced menu. See "Standby Settings" on page 44 for details.

Connecting video source devices

You need only connect the projector to a video source device using just one of the connecting methods, however each provides a different level of video quality. The method you choose will most likely depend upon the availability of matching terminals on both the projector and the video source device as described below:

Terminal nameTerminal appearancePicture quality
HDMIBENQ DX819ST - Connecting video source devices - 1BENQ DX819ST - Connecting video source devices - 2 Best
Component VideoBENQ DX819ST - Connecting video source devices - 3 BENQ DX819ST - Connecting video source devices - 4BENQ DX819ST - Connecting video source devices - 5 Better
S-VideoBENQ DX819ST - Connecting video source devices - 6 BENQ DX819ST - Connecting video source devices - 7BENQ DX819ST - Connecting video source devices - 8BENQ DX819ST - Connecting video source devices - 9 BENQ DX819ST - Connecting video source devices - 10
VideoBENQ DX819ST - Connecting video source devices - 11 BENQ DX819ST - Connecting video source devices - 12BENQ DX819ST - Connecting video source devices - 13 BENQ DX819ST - Connecting video source devices - 14

Connecting audio

The projector has built-in speaker(s) which are designed to provide basic audio functionality accompanying data presentations for business purposes only. They are not designed for, nor intended for stereo audio reproduction use as might be expected in home theater or home cinema applications.

The built-in speaker(s) will be muted when the AUDIO-OUT jack is connected.

BENQ DX819ST - Connecting audio - 1

  • The projector is only capable of playing mixed mono audio, even if a stereo audio input is connected. See "Connecting audio" on page 17 for details.
  • If the selected video image is not displayed after the projector is turned on and the correct video source has been selected, check that the video source device is turned on and operating correctly. Also check that the signal cables have been connected correctly.

Operation

Starting up the projector

I. Plug the power cord into the projector and into a power outlet. Turn on the power outlet switch (where fitted). Check that the POWER indicator light on the projector lights orange after power has been applied.

BENQ DX819ST - Starting up the projector - 1

Please use the original accessories (e.g. power cord) only with the device to avoid possible dangers such as electric shock and fire.

BENQ DX819ST - Starting up the projector - 2

natural_image Diagram showing a plug inserted into a device with cable, no text or symbols present
  1. Press ⏻ POWER or □ ON to start the

projector. As soon as the lamp lights up, a "Power On Ring Tone" will be heard. The POWER indicator light flashes green and stays green when the projector is on.

The start up procedure takes about 30 seconds. In the later stage of start up, a startup logo is projected.

(If necessary) Rotate the focus ring to adjust the image clearness.

To turn off the ring tone, see "Turning off the Power On/Off Ring Tone" on page 33 for details.

BENQ DX819ST - Starting up the projector - 3

If the projector is still hot from previous activity, it will run the cooling fan for approximately 90 seconds before energizing the lamp.

  1. If the projector is activated for the first time, select your OSD language following the on-screen instructions.
  2. If you are prompted for a password, press the arrow keys to enter a six-digit password. See "Utilizing the password function" on page 22 for details.
  3. Switch all of the connected equipment on.
  4. The projector will start to search for input
English한국어Hrvatskiहिक्ति
FrançaisSvenskaRomânà
DeutschNederlandsNorsk
ItalianoTürkçeDansk
EspañolČeštinaĐълія арскі
РусскийPortuguêssuomi
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日本額Magyar _12,23 JII
Press Enter to Confirm, Exit to leave

signals. The current input signal being scanned displays in the upper left corner of the screen. If the projector doesn't detect a valid signal, the message "No Signal" will continue displaying until an input signal is found.

You can also press SOURCE on the projector or remote control to select your desired input signal. See "Switching input signal" on page 24 for details.

BENQ DX819ST - Starting up the projector - 4

If the frequency/resolution of the input signal exceeds the projector's operating range, you will see the message "Out of Range" displayed on the background screen. Please change to an input signal which is compatible with the projector's resolution or set the input signal to a lower setting. See "Timing chart" on page 60 for details.

Adjusting the projected image

Adjusting the projection angle

To adjust the projector:

I. Press the quick-release button and lift the front of the projector. Once the image is positioned where you want it, release the quick-release button to lock the foot in position.
2. Screw the rear adjuster foot to fine-tune the horizontal angle.

To retract the foot, hold up the projector while pressing the quick-release button, then slowly lower the projector. Screw the rear adjuster foot in a reverse direction.

If the projector is not placed on a flat surface or the screen and the projector are not perpendicular to each other, the projected image becomes trapezoidal. To correct this situation, see "Correcting keystone" on page 20 for details.

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text_image Diagram showing a projector with labeled parts and two circular insets illustrating the components of the device.

Do not look into the lens while the lamp is on. The strong light from the lamp may cause damage to your eyes.

Be careful when you press the quick-release button as it is close to the exhaust vent where hot air comes from.

Auto-adjusting the image

In some cases, you may need to optimize the picture quality. To do this, press AUTO on the projector or remote control. Within 3 seconds, the built-in Intelligent Auto Adjustment function will re-adjust the values of Frequency and Clock to provide the best picture quality.

The current source information will be displayed in the corner of the screen for 3 seconds.

BENQ DX819ST - Auto-adjusting the image - 1

This function is only available when PC signal (analog RGB) is selected.

Fine-tuning the image clarity

Sharpen the image by rotating the focus ring.

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text_image Diagram showing the transformation of a historical building to an archway, with a grid-patterned device below.

Correcting keystone

Keystoning refers to the situation where the projected image is noticeably wider at either the top or bottom. It occurs when the projector is not perpendicular to the screen.

To correct this, follow ONE of these steps:

- Press / on the projector or remote control to display the Keystone correction page. Press to correct keystoning at the top of the image. Press to correct keystoning at the bottom of the image.

BENQ DX819ST - Correcting keystone - 1

text_image Press △ .▼ Press □ /▲.

• Using the OSD menu

I. Press MENU/EXIT and then press ◀/▶ until the DISPLAY menu is highlighted.

  1. Press ▼ to highlight Keystone and press MODE/ENTER. The Keystone correction page displays.

  2. Press to correct keystoning at the top of the image. Press to correct keystoning at the bottom of the image.

Using the menus

The projector is equipped with On-Screen Display (OSD) menus for making various adjustments and settings.

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The OSD screenshots below are for reference only, and may differ from the actual design.

Below is the overview of the OSD menu.

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text_image Main menu icon Main menu DISPLAY Wall Color Off Aspect Ratio Auto Keystone Position ENTER Status Sub-menu Phase 0 H. Size 0 Digital Zoom 3D Teaching Template Highlight Current input signal Analog RGB MENU Exit Press MENU/ EXIT to the previous page or to exit.

The following example describes how to set the OSD language.

I. Press MENU/EXIT on the projector or remote control to turn the OSD menu on.

BENQ DX819ST - Using the menus - 3

text_image DISPLAY Wall Color Off Aspect Ratio Auto Keystone Position Phase 0 H. Size 0 Digital Zoom 3D Teaching Template Analog RGB MENU Exit
  1. Press ▼ to highlight Language and press MODE/ENTER.

BENQ DX819ST - Using the menus - 4

text_image SYSTEM SETUP: Basic Presentation Timer Language ENTER Projector Installation Front Table Menu Settings Operation Settings Remote Receiver Front+Rear Panel Key Lock Off Background Color BenQ Splash Screen BenQ Analog RGB MENU Exit
  1. Use / to highlight the SYSTEM SETUP: Basic menu.

BENQ DX819ST - Using the menus - 5

text_image SYSTEM SETUP: Basic Presentation Timer Language Projector Installation Front Table Menu Settings Operation Settings Remote Receiver Front+Rear Panel Key Lock Off Background Color BenQ Splash Screen BenQ Analog RGB MENU Exit

4 . P ◀ ▶ ▲ ▼s / / / t o s preferred language and press MODE/ENTER.

  1. Press MENU/EXIT on the projector or remote control to leave and save the settings.

Securing the projector

Using a security cable lock

The projector has to be installed in a safe place to prevent theft. Otherwise, purchase a lock, such as the Kensington lock, to secure the projector. You can locate a Kensington lock slot on the rear side of the projector. See item 22 on page 9 for details.

A Kensington security cable lock is usually a combination of key(s) and the lock. Refer to the lock's documentation for finding out how to use it.

Utilizing the password function

For security purposes and to help prevent unauthorized use, the projector includes an option for setting up password security. The password can be set through the On-Screen Display (OSD) menu.

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WARNING: You will be inconvenienced if you activate the password functionality and subsequently forget the password. Print out this manual (if necessary) and write the password you used in this manual, and keep the manual in a safe place for later recall.

Setting a password

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Once a password has been set and the power on lock is activated, the projector cannot be used unless the correct password is entered every time the projector is started.

I. Open the OSD menu and go to the SYSTEM SETUP: Advanced > Security Settings menu. Press MODE/ENTER. The Security Settings page displays.
2. Highlight Change Security Settings and press MODE/ENTER.
3. As pictured to the right, the four arrow keys

(▲, ▶, ▼, ◀) respectively represent 4 digits (1, 2, 3, 4). According to the password you desire to set, press the arrow keys to enter six digits for the password.

BENQ DX819ST - Setting a password - 2

Do not press the numeric buttons when asked to enter the password.

  1. Confirm the new password by re-entering the new password.

BENQ DX819ST - Setting a password - 3

text_image INPUT NEW PASSWORD * * 1 4 2 3 BackME

Once the password is set, the OSD menu returns to the Security Settings page.

  1. To activate the Power On Lock function, press ▲/▼ to highlight Power On Lock and press ◀/▶ to select On. When the Power On Lock function is activated, you have to enter the correct password to turn on the projector.

BENQ DX819ST - Setting a password - 4

IMPORTANT: The digits being input will display as asterisks on-screen. Write your selected password down here in this manual in advance or right after the password is entered so that it is available to you should you ever forget it.

Password: ____ ____ ____ ____

Keep this manual in a safe place.

  1. To leave the OSD menu, press MENU/EXIT.

If you forget the password

If the password function is activated, you will be asked to enter the six-digit password every time you turn on the projector. If you enter the wrong password, the password error message as pictured to the right displays lasting for 3 seconds, and the INPUT

PASSWORD message follows. You can retry by entering another six-digit password, or if you did not

record the password in this manual, and you absolutely do not remember it, you can use the password recall procedure. See "Entering the password recall procedure" on page 23 for details.

BENQ DX819ST - If you forget the password - 1

text_image Password Error Please try again.

If you enter an incorrect password 5 times in succession, the projector will automatically shut down in a short time.

Entering the password recall procedure

I. Press and hold AUTO on the projector or remote control for 3 seconds. The projector will display a coded number on the screen.

  1. Write down the number and turn off your projector.
  2. Seek help from the local BenQ service center to decode the number. You may be required to provide proof of purchase documentation to verify that you are an authorized user of the projector.

BENQ DX819ST - Entering the password recall procedure - 1

text_image RECALL PASSWORD Please write down the recall code, and contact BenQ Customer Center. Recall Code: 255 255 255 255 MENU Exit

Changing the password

I. Open the OSD menu and go to the SYSTEM SETUP: Advanced> Security Settings > Change Password menu.
2. Press MODE/ENTER. The message "INPUT CURRENT PASSWORD" appears.
3. Enter the old password.

i. If the password is correct, another message "INPUT NEW PASSWORD" displays.
ii. If the password is incorrect, the password error message displays lasting for three seconds, and the message "INPUT CURRENT PASSWORD" displays for your retry. You can press MENU/EXIT to cancel the change or try another password.

  1. Enter a new password.

BENQ DX819ST - Changing the password - 1

IMPORTANT: The digits being input will display as asterisks on-screen. Write your selected password down here in this manual in advance or right after the password is entered so that it is available to you should you ever forget it.

Password: ____ ____ ____

Keep this manual in a safe place.

  1. Confirm the new password by re-entering the new password.
  2. You have successfully assigned a new password to the projector. Remember to enter the new password next time the projector is started.
  3. To leave the OSD menu, press MENU/EXIT.

Disabling the password function

To disable password protection, go back to the SYSTEM SETUP: Advanced > Security Settings > Change Security Settings menu after opening the OSD menu system. Press MODE/ENTER. The message “INPUT PASSWORD” displays. Enter the current password.

i. If the password is correct, the OSD menu returns to the Security Settings page.
Press ▼ to highlight Power On Lock and press ◀/▶ to select Off. You will not have to enter the password next time when turning on the projector.
ii. If the password is incorrect, the password error message displays lasting for three seconds, and the message "INPUT PASSWORD" displays for your retry. You can press MENU/EXIT to cancel the change or try another password.

BENQ DX819ST - Disabling the password function - 1

Though the password function is disabled, you need to keep the old password in hand should you ever need to re-activate the password function by entering the old password.

Switching input signal

The projector can be connected to multiple devices at the same time. However, it can only display one full screen at a time. When starting up, the projector automatically searches for the available signals.

Be sure the Quick Auto Search function in the SOURCE menu is On if you want the projector to automatically search for the signals.

To select the source:

I. Press SOURCE on the projector or remote control. A source selection bar displays.
2. Press / until your desired signal is selected and press MODE/ENTER.
Once detected, the selected source information will display at the corner of the screen for seconds. If there is multiple equipment connected to the projector, repeat steps 1-2 to search for another signal.

BENQ DX819ST - Switching input signal - 1

- The brightness level of the projected image will change accordingly when you switch between different input signals. Data (graphic) "PC" presentations using mostly static images are generally brighter than "Video" using mostly moving images (movies).

- The native display resolution of this projector is in a 4:3 aspect ratio. For best display picture results, you should select and use an input signal which outputs at this resolution. Any other resolutions will be scaled by the projector depending upon the “aspect ratio” setting, which may cause some image distortion or loss of picture clarity. See "Selecting the aspect ratio" on page 25 for details.

BENQ DX819ST - Switching input signal - 2

text_image Computer1/YPbPr1 Computer2/YPbPr2 HDMI Video S-Video

Changing Color Space

In the unlikely event that you connect the projector to a DVD player via the projector's HDMI input and the projected picture displays wrong colors, please change the color space to YUV.

To do this:

I. Press MENU/EXIT and then press ◀/▶ until the SOURCE menu is highlighted.

  1. Press ▼ to highlight Color Space Conversion and press ◀/▶ to select a suitable color space.

BENQ DX819ST - Changing Color Space - 1

This function is only available when the HDMI-input port is in use.

Magnifying and searching for details

If you need to find the details on the projected picture, magnify the picture. Use the direction arrow keys for navigating the picture.

• Using the remote control

I. Press ZOOM+/ZOOM- to display the Zoom bar. Press ZOOM+ to magnify the center of the picture. Press the key repeatedly until the picture size is suitable for your need.

  1. Use the directional arrows ( , ,▲ ) on the projector or remote control to navigate the picture.

  2. To restore the picture to its original size, press AUTO. You can also press ZOOM-. When the key is pressed again, the picture is further reduced until it is restored to the original size.

- Using the OSD menu

I. Press MENU/EXIT and then press ◀ /▶ until the DISPLAY menu is highlighted.

  1. Press ▼ to highlight Digital Zoom and press MODE/ENTER. The Zoom bar displays.

  2. Press repeatedly to magnify the picture to a desired size.

  3. To navigate the picture, press MODE/ENTER to switch to the panning mode and press the directional arrows (▲, ▼) ◄ the projector or remote control to navigate the picture.

  4. To reduce size of the picture, press MODE/ENTER to switch back to the zoom in/out function, and press AUTO to restore the picture to its original size. You can also press ▼ repeatedly until it is restored to the original size.

BENQ DX819ST - Magnifying and searching for details - 1

The picture can only be navigated after it is magnified. You can further magnify the picture while searching for details.

Selecting the aspect ratio

The “aspect ratio” is the ratio of the image width to the image height. Most analog TV and some computers are in 4:3 ratio, and digital TV and DVDs are usually in 16:9 ratio.

With the advent of digital signal processing, digital display devices like this projector can dynamically stretch and scale the image output to a different aspect than that of the image input signal.

To change the projected picture ratio (no matter what aspect the source is):

• Using the remote control

I. Press ASPECT to show the current setting.

  1. Press ASPECT repeatedly to select an aspect ratio to suit the format of the video signal and your display requirements.

- Using the OSD menu

I. Press MENU/EXIT and then press ◀ /▶ until the DISPLAY menu is highlighted.

  1. Press ▼ to highlight Aspect Ratio.

  2. Press / to select an aspect ratio to suit the format of the video signal and your display requirements.

About the aspect ratio

BENQ DX819ST - About the aspect ratio - 1

• In the pictures below, the black portions are inactive areas and the white portions are active areas.
- OSD menus can be displayed on those unused black areas.

  1. Auto: Scales an image proportionally to fit the projector's native resolution in its horizontal or vertical width. This is suitable for the incoming image which is neither in 4:3 nor 16:9 and you want to make most use of the screen without altering the image's aspect ratio.

BENQ DX819ST - About the aspect ratio - 2

text_image 15.0 points
  1. Real : The image is projected as its original resolution, and resized to fit within the display area. For input signals with lower resolutions, the projected image will display smaller than if resized to full screen. You could adjust the zoom setting or move the projector towards the screen to increase the image size if necessary. You may also need to refocus the projector after making these adjustments.

BENQ DX819ST - About the aspect ratio - 3

text_image 4:3 picture

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text_image 16:9 picture
  1. 4:3: Scales an image so that it is displayed in the center of the screen with a 4:3 aspect ratio. This is most suitable for 4:3 images like some computer monitors, standard definition TV and 4:3 aspect DVD movies, as it displays them without aspect alteration.

BENQ DX819ST - About the aspect ratio - 5

text_image 4:3 picture
  1. 16:9: Scales an image so that it is displayed in the center of the screen with a 16:9 aspect ratio. This is most suitable for images which are already in a 16:9 aspect, like high definition TV, as it displays them without aspect alteration.

BENQ DX819ST - About the aspect ratio - 6

text_image 16:9 picture
  1. 16:10: Scales an image so that it is displayed in the center of the screen with a 16:10 aspect ratio. This is most suitable for images which are already in a 16:10 aspect, as it displays them without aspect alteration.

BENQ DX819ST - About the aspect ratio - 7

text_image 16:10 picture

Optimizing the image

Using Wall Color

In the situation where you are projecting onto a colored surface such as a painted wall which may not be white, the Wall Color feature can help correct the projected picture's colors to prevent possible color difference between the source and projected pictures.

To use this function, go to the DISPLAY > Wall Color menu and press ◀/▶ to select a color which is closest to the color of the projection surface. There are several precalibrated colors to choose from: Light Yellow, Pink, Light Green, Blue, and Blackboard.

Selecting a picture mode

The projector is preset with several predefined picture modes so that you can choose one to suit your operating environment and input signal picture type.

To select an operation mode that suits your need, you can follow one of the following steps.

  • Press MODE/ENTER on the projector or remote control repeatedly until your desired mode is selected.
  • Go to the PICTURE > Picture Mode menu and press ◀/▶ to select a desired mode.

  • Dynamic mode: Maximizes the brightness of the projected image. This mode is suitable for environments where extra-high brightness is required, such as using the projector in well lit rooms.

  • Presentation mode: Is designed for presentations. The brightness is emphasized in this mode to match PC and notebook coloring.
  • sRGB mode: Maximizes the purity of RGB colors to provide true-to-life images regardless of brightness setting. It is most suitable for viewing photos taken with an sRGB compatible and properly calibrated camera, and for viewing PC graphic and drawing applications such as AutoCAD.
  • Cinema mode: Is appropriate for playing colorful movies, video clips from digital cameras or DVs through the PC input for best viewing in a blackened (little light) environment.
  • 3D mode: Is appropriate for playing 3D images and 3D video clips.
  • User I/User 2 mode: Recalls the settings customized based on the current available picture modes. See "Setting the User I/User 2 mode" on page 27 for details.

Setting the User I/User 2 mode

There are two user-definable modes if the current available picture modes are not suitable for your need. You can use one of the picture modes (except the User 1/2) as a starting point and customize the settings.

I. Press MENU/EXIT to open the On-Screen Display (OSD) menu.
2. Go to the PICTURE > Picture Mode menu.
3. Press ◀/▶ to select User I or User 2.
4. Press ▼ to highlight Reference Mode.

BENQ DX819ST - Setting the User I/User 2 mode - 1

This function is only available when User 1 or User 2 mode is selected up in the Picture Mode sub-menu item.

  1. Press ◀/▶ to select a picture mode that is closest to your need.

  2. Press ▼ to select a menu item to be changed and adjust the value with ◀/▶. See "Fine-tuning the image quality in user modes" below for details.

Fine-tuning the image quality in user modes

According to the detected signal type and selected picture mode, some of the below functions may not be available. Based on your needs, you can make adjustments to these functions by highlighting them and pressing ◀▶the projector or remote control.

Adjusting Brightness

The higher the value, the brighter the image. And the lower the setting, the darker the image. Adjust this control so the black areas of the image appear just as black and that detail in the dark areas is visible.

BENQ DX819ST - Adjusting Brightness - 1

BENQ DX819ST - Adjusting Brightness - 2

BENQ DX819ST - Adjusting Brightness - 3

Adjusting Contrast

The higher the value, the greater the contrast. Use this to set the peak white level after you have previously adjusted the Brightness setting to suit your selected input and viewing environment.

BENQ DX819ST - Adjusting Contrast - 1

BENQ DX819ST - Adjusting Contrast - 2

BENQ DX819ST - Adjusting Contrast - 3

Adjusting Color

Lower setting produces less saturated colors. If the setting is too high, colors on the image will be overpowering, which makes the image unrealistic.

Adjusting Tint

The higher the value, the more reddish the picture becomes. The lower the value, the more greenish the picture becomes.

Adjusting Sharpness

The higher the value, the sharper the picture becomes. The lower the value, the softer the picture becomes.

Adjusting Brilliant Color

This feature utilizes a new color-processing algorithm and system level enhancements to enable higher brightness while providing truer, more vibrant colors in picture. It enables a greater than 50% brightness increase in mid-tone images, which are common in video and natural scenes, so the projector reproduces images in realistic and true colors. If you prefer images with that quality, select On. If you don't need it, select Off.

When Off is selected, the Color Temperature function is not available.

Selecting a Color Temperature

The options available for color temperature* settings vary according to the signal type selected.

I. Cool: Makes images appear bluish white.
2. Normal: Maintains normal colorings for white.
3. Warm: Makes images appear reddish white.

\*About color temperatures:

There are many different shades that are considered to be "white" for various purposes. One of the common methods of representing white color is known as the "color temperature". A white color with a low color temperature appears to be reddish white. A white color with a high color temperature appears to have more blue in it.

Setting a preferred color temperature

To set a preferred color temperature:

I. Highlight Color Temperature and select Warm, Normal or Cool by pressing ▶/▶ on the projector or remote control.
2. Press ▼ to highlight Color Temperature Fine Tuning and press MODE/ENTER. The Color Temperature Fine Tuning page displays.
3. Press / to highlight the item you want to change and adjust the values by pressing ◀/▶.

• R Gain/G Gain/B Gain: Adjusts the contrast levels of Red, Green, and Blue.

• R Offset/G Offset/B Offset: Adjusts the brightness levels of Red, Green, and Blue.

  1. Press MENU/EXIT to exit and save the settings

3D Color Management

In most installation situations, color management will not be necessary, such as in classroom, meeting room, or lounge room situations where lights remain on, or where building external windows allow daylight into the room.

Only in permanent installations with controlled lighting levels such as boardrooms, lecture theaters, or home theaters, should color management be considered. Color management provides fine color control adjustment to allow for more accurate color reproduction, should you require it.

Proper color management can only be achieved under controlled and reproducible viewing conditions. You will need to use a colorimeter (color light meter), and provide a set of suitable source images to measure color reproduction. These tools are not provided with the projector, however, your projector supplier should be able to provide you with suitable guidance, or even an experienced professional installer.

The Color Management provides six sets (RGBCMY) of colors to be adjusted. When you select each color, you can independently adjust its range and saturation according to your preference.

If you have purchased a test disc which contains various color test patterns and can be used to test the color presentation on monitors, TVs, projectors, etc, you can project any image from the disc on the screen and enter the 3D Color Management menu to make adjustments.

To adjust the settings:

I. Go to the PICTURE menu and highlight 3D Color Management.
2. Press MODE/ENTER on the projector or remote control and the 3D Color Management page displays.
3. Highlight Primary Color and press ◀/▶ to select a color from among Red, Yellow, Green, Cyan, Blue, or Magenta.
4. Press ▼ to highlight Hue and press ◀/▶ to select its range. Increase in the range will include colors consisted of more proportions of its two adjacent colors.

Please refer to the illustration to the right for how the colors relate to each other. For example, if you select Red and set its range at 0, only pure red in the projected picture will be selected. Increasing its range will include red close to yellow and red close to magenta.

BENQ DX819ST - 3D Color Management - 1

other | Category | Count | |---|---| | RED | 1 | | Green | 1 | | Blue | 1 | | Cyan | 1 | | Magenta | 1 | | Yellow | 1 | | Red | 0 | | Blue | 0 | | Magenta | 0 | | Yellow | 0 | | Blue | 0 | | Red | 0 | | Blue | 0 | | Magenta | 0 | | Yellow | 0 | | Blue | 0 | | Red | 0 | | Blue | 0 | | Magenta | 0 | | Yellow | 0 | | Blue | 0 | | Red | 0 | | Blue | 0 | | Magenta | 0 | | Yellow | 0 | | Blue | 0 | | Red | 0 |
  1. Press ▼ to highlight Saturation and adjust

its values to your preference by pressing

▶. Every adjustment made will reflect to the image immediately.

For example, if you select Red and set its value at 0, only the saturation of pure red will be affected.

BENQ DX819ST - 3D Color Management - 2

Saturation is the amount of that color in a video picture. Lower settings produce less saturated colors; a setting of "0" removes that color from the image entirely. If the saturation is too high, that color will be overpowering and unrealistic.

  1. Press ▼ to highlight Gain and adjust its values to your preference by pressing ◀/

▶. The contrast level of the primary color you select will be affected. Every adjustment made will reflect to the image immediately.

  1. Repeat steps 3 to 6 for other color adjustments.
  2. Make sure you have made all of the desired adjustments.
  3. Press MENU/EXIT to exit and save the settings.

Resetting current or all picture modes

I. Go to the PICTURE menu and highlight Reset Picture Setting.
2. Press MODE/ENTER and press ▲/▼ to select Current or All.

• Current: returns current picture mode to the factory preset settings.
- All: returns all settings, except User I/User 2 in the PICTURE menu to the factory preset settings.

Setting the presentation timer

Presentation timer can indicate the presentation time on the screen to help you achieve better time management when giving presentations. Follow these steps to utilize this function:

I. Go to the SYSTEM SETUP: Basic > Presentation Timer menu and press MODE/ENTER to display the Presentation Timer page.
2. Highlight Timer Period and decide the time period by pressing ◀/▶. The length of time can be set from 1 to 5 minutes in 1-minute increments and 5 to 240 minutes in 5-minute increments.

BENQ DX819ST - Setting the presentation timer - 1

If the timer is already on, the timer will restart whenever the Timer Period is reset.

  1. Press ▼ to highlight Timer Display and choose if you want the timer to show up on the screen by pressing 🔊 ▶

Selection Description

Always Displays the timer on screen throughout the presentation time.

3 min/2 min/1 min Displays the timer on screen in the last 3/2/1 minute(s).

Never Hides the timer throughout the presentation time.

  1. Press ▼ to highlight Timer Position and set the timer position by pressing ◀/▶.

Top-Left → Bottom-Left → Top-Right → Bottom-Right

  1. Press ▼ to highlight Timer Counting Direction and select your desired counting direction by pressing ◀. ▶
SelectionDescription
Count UpIncreases from 0 to the preset time.
Count DownDecreases from the preset time to 0.
  1. Press ▼ to highlight Sound Reminder and decide if you want to activate sound reminder by pressing ◀/▶. If you select On, a double beep sound will be heard at the last 30 seconds of counting down/up, and a triple beep sound will be produced when the timer is up.

  2. To activate the presentation timer, press ▼ and press ◀/▶ to highlight On and press MODE/ENTER.

  3. A confirmation message displays. Highlight Yes and press MODE/ENTER on the projector or remote control to confirm. You will see the message "Timer is On" displaying on the screen. The timer starts counting when the timer is on.

To cancel the timer, perform the following steps:

I. Go to the SYSTEM SETUP: Basic > Presentation Timer menu and highlight Off. Press MODE/ENTER. A confirmation message displays.

  1. Highlight Yes and press MODE/ENTER to confirm. You will see the message "Timer is Off" displaying on the screen.

Remote paging operations

Connect the projector to your PC or notebook with a USB cable prior to using the paging function. See "Connection" on page 16 for details.

You can operate your display software program (on a connected PC) which responds to page up/down commands (like Microsoft PowerPoint) by pressing PAGE +/PAGE - on the remote control.

If remote paging function doesn't work, check if the USB connection is correctly made and the mouse driver on your computer is updated to the latest version.

BENQ DX819ST - Remote paging operations - 1

The remote paging function cannot work with Microsoft® Windows®98 operating system. Windows®XP or higher operating systems are recommended.

Freezing the image

Press FREEZE on the remote control to freeze the image. The word "FREEZE" will display in the upper left corner of the screen. To release the function, press any key on the projector or remote control.

BENQ DX819ST - Freezing the image - 1

If your remote control has the following keys, please note that they cannot be pressed to release the function: LASER, PAGE +/PAGE -, NETWORK.

Even if an image is frozen on the screen, the pictures are running on the video or other device. If the connected devices have active audio output, you will still hear the audio even though the image is frozen onscreen.

Hiding the image

In order to draw the audience's full attention to the presenter, you can use ECO BLANK on the projector or remote control to hide the screen image. When this function is activated with an audio input connected, the audio can still be sheard.

You can set the blank time in the SYSTEM SETUP: Basic > Operation Settings > Blank Timer menu to let the projector return the image automatically after a period of time when there is no action taken on the blank screen.

If the preset time spans are not suitable for your presentation, select Disable.

No matter Blank Timer is activated or not, you can press most of the keys on the projector or remote control to restore the picture.

BENQ DX819ST - Hiding the image - 1

Do not block the projection lens from projecting as this could cause the blocking object to become heated and deformed or even cause a fire.

Locking control keys

With the control keys on the projector locked, you can prevent your projector settings from being changed accidentally (by children, for example). When the Panel Key Lock is on, no control keys on the projector will operate except ⏻ POWER.

I. Go to the SYSTEM SETUP: Basic > Panel Key Lock menu, and select On by pressing ◀ of the projector or remote control. A confirmation message displays.
2. Highlight Yes and press MODE/ENTER to confirm.

To release panel key lock, use the remote control to enter the SYSTEM SETUP: Basic > Panel Key Lock menu and press ◀/▶ to select Off.

BENQ DX819ST - Locking control keys - 1

  • Keys on the remote control are still active when panel key lock is enabled.
  • If you turn off the projector without disabling panel key lock, the projector will still be in locked status the next time it is turned on.

Operating in a high altitude environment

We recommend you use the High Altitude Mode when your environment is between 1500 m –3000 m above sea level, and ambient temperature is between 0^ C– 30^ C.

BENQ DX819ST - Operating in a high altitude environment - 1

Do not use the High Altitude Mode if your altitude is between 0 m and 1500 m and ambient temperature is between 0°C and 35°C. The projector will be over cooled, if you turn the mode on under such a condition.

To activate the High Altitude Mode:

I. Press MENU/EXIT and then press ◀/▶ until the SYSTEM SETUP: Advanced menu is highlighted.
2. Press ▼ to highlight High Altitude Mode and press ◀/▶ select On. A confirmation message displays.
3. Highlight Yes and press MODE/ENTER.

Operation under "High Altitude Mode" may cause a higher decibel operating noise level because of increased fan speed necessary to improve overall system cooling and performance.

If you use this projector under other extreme conditions excluding the above, it may display auto shut-down symptoms, which is designed to protect your projector from overheating. In cases like this, you should switch to High Altitude mode to solve these symptoms. However, this is not to state that this projector can operate under any and all harsh or extreme conditions.

Adjusting the sound

The sound adjustments made as below will have an effect on the projector speaker(s). Be sure you have made a correct connection to the projector audio input. See "Connection" on page 16 for how the audio input is connected.

Muting the sound

To temporarily turn off the sound:

I. Press MENU/EXIT and then press ◀/▶ until the SYSTEM SETUP: Advanced menu is highlighted.
2. Press ▼ to highlight Audio Settings and press MODE/ENTER. The Audio Settings page displays.
3. Highlight Mute and press ◀/▶ to select On.

BENQ DX819ST - Muting the sound - 1

If available, you can also press MUTE on the remote control to toggle projector audio between on and off.

Adjusting the sound level

To adjust the sound level, press 📄 or 🏠

I. Repeat steps 1-2 above.
2. Press ▼ to highlight Volume and press ◀/▶ to select a desired sound level.

Turning off the Power On/Off Ring Tone

To turn off the ring tone:

I. Repeat steps 1-2 above.
2. Press ▼ to highlight Power On/Off Ring Tone and press ◀/▶ to select Off.

BENQ DX819ST - Turning off the Power On/Off Ring Tone - 1

The only way to change Power On/Off Ring Tone is setting On or Off here. Setting the sound mute or changing the sound level will not affect the Power On/Off Ring Tone.

Using the test pattern

The projector is able to display the grid test pattern. It helps you adjust the image size and focus and check that the projected image is free from distortion.

To display the test pattern, open the OSD menu and go to the SYSTEM SETUP: Advanced > Test Pattern and press ◀/▶ to select On.

BENQ DX819ST - Using the test pattern - 1

natural_image Grid pattern with uniform white squares on black background, no text or symbols present

Using the teaching templates

The projector provides several preset patterns for various teaching purposes. To activate the pattern:

  1. Open the OSD menu and go to the DISPLAY > Teaching Template menu and press ▲/▼ to select Blackboard or Whiteboard.
  2. Press / to choose the pattern you need.
  3. Press MODE/ENTER to activate the pattern.
Teaching TemplateWhiteboard Blackboard
Letter FormationBENQ DX819ST - Using the teaching templates - 1
WorksheetBENQ DX819ST - Using the teaching templates - 2
Coordinate ChartBENQ DX819ST - Using the teaching templates - 3

Shutting down the projector

I. Press ⏻ POWER or ⏻ OFF and a confirmation message will display prompting you. If you don't respond in a few seconds, the message will disappear.
2. Press ⏻ POWER or ⏻ OFF a second time. The POWER indicator light flashes orange, the projection lamp shuts down, and the fans will continue to run for approximately 90 seconds to cool down the projector.

To protect the lamp, the projector will not respond to any commands during the cooling process.

To shorten the cooling time, you can also activate the Quick cooling function. See "Quick Cooling" on page 42 for details.
3. Once the cooling process finishes, a "Power Off Ring Tone" will be heard. The POWER indicator light is a steady orange and fans stop. Disconnect the power cord from the power outlet.

  • To turn off the power ring tone, see "Turning off the Power On/Off Ring Tone" on page 33 for details.
  • If the projector is not properly shut down, to protect the lamp, when you attempt to re-start the projector, the fans will run for a

few minutes to cool down. Press ⏻ POWER or 📋 ON again to start the projector after the fans stop and the POWER indicator light turns orange.

- Lamp life results will vary depending on environmental conditions and usage.

BENQ DX819ST - Shutting down the projector - 1

natural_image Diagram showing a plug inserted into a computer socket connected to a USB cable (no text or symbols visible)

Direct power off

The AC power cord can be pulled out right after the projector is turned off. To protect the lamp, wait about 10 minutes before re-starting the projector. (When you attempt to re-start the projector, the fans may run for a few minutes to cool down. In such cases, press ⏻ POWER or ☐ ON again to start the projector after the fans stop and the POWER indicator light turns orange.

Please note that the on-screen display (OSD) menus vary according to the signal type selected and the projector model you are using.

Main menuSub-menu Options
I. DISPLAYWall ColorOff/Light Yellow/Pink/Light Green/Blue/Blackboard
Aspect Ratio Auto/Real/4:3/16:9/16:10
Keystone
Position
Phase
H. Size
Digital Zoom
3D3D ModeAuto/Top Bottom/Frame Sequential/Frame Packing/Side by Side/Off
3D Sync InvertDisable/Invert
Teaching TemplateBlackboardOff/Letter Formation/Worksheet/Coordinate Chart
WhiteboardOff/Letter Formation/Worksheet/Coordinate Chart
2. PICTUREPicture ModeDynamic/Presentation/sRGB/Cinema/3D/User 1/User 2
Reference ModeDynamic/Presentation/sRGB/Cinema/3D
Brightness
Contrast
Color
Tint
Sharpness
Brilliant Color On/Off
Color Temperature Cool/Normal/Warm
Color Temperature Fine TuningR Gain/G Gain/B Gain/R Offset/G Offset/B Offset
3D Color ManagementPrimary Color R/G/B/C/M/Y
Hue
Saturation
Gain
Reset Picture Settings Current/All/Cancel
3. SOURCEQuick Auto Search On/Off
Color Space Conversion Auto/RGB/YUV
Main menu Sub-menu Options
4. SYSTEM SETUP: BasicPresentation TimerTimer Period 1~240 minutes
Timer Display Always/3 min/2 min/1 min/Never
Timer Position Top-Left/Bottom-Left/Top-Right/Bottom-Right
Timer Counting Direction Count Down/Count Up
Sound Reminder On/Off
On/Off
LanguageEnglish/Français/Deutsch Italiano/Espanol/Pyccskii 繁體中文/筒体中文/日本語/한국어/Svenska/Nederlands/Türkçe/Čeština/Português/Inu/Polski Magyar/Български/Hrvatski/Română/Suomi/Norsk/Dansk/Indonesian/Еллгмкá/العربية/हिन्दी
Projector InstallationFront Table/Rear Table/Rear Ceiling/Front Ceiling
Menu SettingsMenu Display Time 5 sec/10 sec/20 sec/30 sec/Always
Menu Position Center/Top-Left/Top-Right/Bottom-Right/Bottom-Left
Reminder Message On/Off
Operation SettingsDirect Power On On/Off
Signal Power On On/Off
Auto Power Off Disable/3 min/10 min/15 min/20 min/25 min/30 min
Quick Cooling On/Off
Instant Restart On/Off
Blank Timer Disable/5 min/10 min/15 min/20 min/25 min/30 min
Sleep Timer Disable/30 min/1 hr/2 hr/3 hr/4 hr/8 hr/12 hr
Reset Filter Timer Reset/Cancel
Remote Receiver Front+Rear/Front/Rear
Panel Key Lock On/Off
Background Color BenQ/Black/Blue/Purple
Splash Screen BenQ/Black/Blue
Main menu Sub-menu Options
5. SYSTEM SETUP: AdvancedHigh Altitude ModeOn/Off
Audio SettingsMute On/Off
Volume
Power On/Off Ring ToneOn/Off
Lamp SettingsLamp ModeNormal/Economic/SmartEco/LampSave
Reset Lamp TimerReset/Cancel
Equivalent Lamp
Security SettingsChange Password
Change Security SettingsPower On Lock
Baud Rate2400/4800/9600/14400/19200/38400/57600/115200
Test Pattern On/Off
Closed CaptionClosed Caption EnableOn/Off
Caption Version CCI/CC2/CC3/CC4
Standby SettingsNetwork On/Off
Monitor Out On/Off
Audio Pass ThroughOff/Audio in 1/Audio in 2/Audio L/R/HDMI
Network SettingsWired LANStatus
DHCP
IP Address
Subnet Mask
Default Gateway
DNS Server
Apply
AMX Device DiscoveryOn/Off
MAC Address
Reset All SettingsReset/Cancel
6. INFORMATIONCurrent System StatusSourcePicture ModeLamp ModeResolution3D FormatColor SystemEquivalent LampFirmware Version

Note that the menu items are available when the projector detects at least one valid signal. If there is no equipment connected to the projector or no signal detected, limited menu items are accessible.

Description of each menu

Function Description
Wall ColorCorrects the projected picture's color when the projection surface is not white. See "Using Wall Color" on page 27 for details.
Aspect RatioThere are several options to set the image's aspect ratio depending on your input signal source. See "Selecting the aspect ratio" on page 25 for details.
KeystoneCorrects any keystoning of the image. See "Correcting keystone" on page 20 for details.
PositionDisplays the position adjustment page. To move the projected image, use the directional arrow keys. The values shown on the lower position of the page change with every key press you made until they reach their maximum or minimum.This function is only available when a PC signal (analog RGB) is selected.
PhaseAdjusts the clock phase to reduce image distortion.This function is only available when a PC signal (analog RGB) is selected.
H. SizeAdjusts the horizontal width of the image.This function is only available when a PC signal (analog RGB) is selected.
Digital ZoomMagnifies or reduces the projected image. See "Magnifying and searching for details" on page 25 for details.
3DThis projector features a 3D function which enables you to enjoy the 3D movies, videos, and sporting events in a more realistic way by presenting the depth of the images. You need to wear a pair of 3D glasses to view the 3D images.3D ModeThe default setting is Auto and the projector automatically chooses an appropriate 3D format when detecting 3D contents. If the projector cannot recognize the 3D format, press ▲/▼ to choose a 3D mode.When the 3D function is on:· The brightness level of the projected image will decrease.· The Picture Mode cannot be adjusted.· The Keystone can only be adjusted within limited degrees.3D Sync InvertWhen you discover the inversion of the image depth, enable this function to correct the problem.
Function Description
1. DISPLAY menuTeaching TemplateSee "Using the teaching templates" on page 34 for details.
2. PICTURE menuPicture ModePre-defined picture modes are provided so you can optimize your projector image set-up to suit your program type. See "Selecting a picture mode" on page 27 for details.
Reference ModeSelects a picture mode that best suits your need for the image quality and further fine-tune the image based on the selections listed on the same page below. See "Setting the User 1/User 2 mode" on page 27 for details.
BrightnessAdjusts the brightness of the image. See "Adjusting Brightness" on page 28 for details.
ContrastAdjusts the degree of difference between dark and light in the image. See "Adjusting Contrast" on page 28 for details.
ColorAdjusts the color saturation level -- the amount of each color in a video image. See "Adjusting Color" on page 28 for details.This function is only available when a Video, S-Video or Component Video signal is selected.
TintAdjusts the red and green color tones of the image. See "Adjusting Tint" on page 28 for details.This function is only available when a Video or S-Video signal is selected and the system format is NTSC.
SharpnessAdjusts the image to make it look sharper or softer. See "Adjusting Sharpness" on page 28 for details.This function is only available when a Video, S-Video or Component Video signal is selected.
Brilliant ColorSee "Adjusting Brilliant Color" on page 28 for details.
Color TemperatureSee "Selecting a Color Temperature" on page 28 for details.
Color Temperature Fine TuningSee "Setting a preferred color temperature" on page 29 for details.
3D Color ManagementSee "3D Color Management" on page 29 for details.
Reset Picture SettingsSee "Resetting current or all picture modes" on page 30 for details.
Function Description
3. SOURCE menuQuick Auto SearchSee "Switching input signal" on page 24 for details.
Color Space ConversionSee "Changing Color Space" on page 24 for details.
4. SYSTEM SETUP: Basic menuPresentation TimerReminds the presenter to finish the presentation within a certain time frame. See "Setting the presentation timer" on page 30 for details.
LanguageSets the language for the On-Screen Display (OSD) menus. See "Using the menus" on page 21 for details.
Projector InstallationThe projector can be installed on a ceiling or behind a screen, or with one or more mirrors. See "Choosing a location" on page 14 for details.
Menu SettingsMenu Display TimeSets the length of time the OSD will remain active after your last key press.Menu PositionSets the On-Screen Display (OSD) menu position.Reminder MessageSets the reminder messages on or off.
Function Description
4. SYSTEM SETUP: Basic menuOperation SettingsDirect Power OnAllows the projector to turn on automatically once the power is fed through the power cord.Signal Power OnSets whether to turn the projector directly on without pressing ⏻POWER or ⏱ON when the projector is in standby mode and the signal is feed through the VGA cable.Auto Power OffAllows the projector to turn off automatically if no input signal is detected after a set period of time. See "Setting Auto Power Off" on page 48 for details.Quick CoolingEnables or disables the Quick Cooling function. Selecting On enables the function and projector cooling time will be shortened from a normal 90-second duration to approximately 15 seconds.This function is only available when Instant Restart is off.Instant RestartSelecting On enables you to restart the projector immediately within 90 seconds after turning it off.Blank TimerSets the image blank time when the Blank feature is activated, once elapsed the image will return to the screen. See "Hiding the image" on page 32 for details.Sleep TimerSets the auto-shutdown timer.Reset Filter TimerSee "Resetting the filter timer" on page 47 for details.
Remote ReceiverAllows you to enable all the remote receivers or one specific remote receiver on the projector.
Panel Key LockDisables or enables all panel key functions except ⏻ POWER on the projector and keys on the remote control. See "Locking control keys" on page 32 for details.
Background ColorSets the background color for the projector.
Splash ScreenAllows you to select which logo screen will display during projector start-up.
5. SYSTEM SETUP: Advanced menuHigh Altitude Mode
Audio Settings
Lamp Settings
Security Settings
Baud Rate
Test Pattern
Closed Caption
Function Description
5. SYSTEM SETUP: Advanced menuStandby SettingsNetworkSelectingOnenables the function. The projector is able to provide the network function when it is in standby mode.Monitor OutSelectingOnenables the function. The projector can output a VGA signal when it is in standby mode and theCOMPUTER-Ijack is correctly connected to devices. See "Connection" on page 16for how to make the connection.Audio Pass ThroughThe projector can play sound when it is in standby mode and the corresponding jacks are correctly connected to devices. Press◄► choose the source that you wish to use. See "Connection" on page 16 for how to make the connection.Enabling this function slightly increases the standby power consumption.
Network SettingsWired LANSeeBenQ Network Projector Operation Guidefor details.AMX Device DiscoveryWhen AMX Device Discoveryis On, the projector can be detected by AMX controller.MAC AddressDisplays the mac address of this projector.
Reset All SettingsReturns all settings to the factory preset values.The following settings will still remain: Keystone, Phase, User 1, User 2, Reference Mode, Language, Projector Installation, High Altitude Mode, Security Settings, Network Settings and Baud Rate.
6. INFORMATION menuCurrent System StatusSourceShows the current signal source.Picture ModeShows the selected mode in thePICTUREmenu.Lamp ModeShows the current lamp mode.ResolutionShows the native resolution of the input signal.3D FormatShows the current 3D mode.Color SystemShows input system format.Equivalent LampDisplays the number of hours the lamp has been used.Firmware VersionShows the firmware version of your projector.

Maintenance

Care of the projector

Your projector needs little maintenance. The only thing you need to do on a regular basis is to keep the lens and case clean.

Never remove any parts of the projector except the lamp. Contact your dealer if other parts need replacing.

Cleaning the lens

Clean the lens whenever you notice dirt or dust on the surface. Please be sure to turn off the projector, unplug the power cable and let it cool down completely before cleaning the lens.

  • Use a canister of compressed air to remove dust.
  • If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens cleaner and gently wipe the lens surface.
  • Never use any type of abrasive pad, alkaline/acid cleaner, scouring powder, or volatile solvent, such as alcohol, benzene, thinner or insecticide. Using such materials or maintaining prolonged contact with rubber or vinyl materials may result in damage to the projector surface and cabinet material.

Cleaning the projector case

Before you clean the case, turn the projector off using the proper shutdown procedure as described in "Shutting down the projector" on page 35 and unplug the power cord.

  • To remove dirt or dust, wipe the case with a soft, lint-free cloth.
  • To remove stubborn dirt or stains, moisten a soft cloth with water and a neutral pH detergent. Then wipe the case.

BENQ DX819ST - Cleaning the projector case - 1

Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the case.

Storing the projector

If you need to store the projector for an extended time, please follow the instructions below:

  • Make sure the temperature and humidity of the storage area are within the recommended range for the projector. Please refer to "Specifications" on page 55 or consult your dealer about the range.
  • Retract the adjuster feet.
  • Remove the battery from the remote control.
  • Pack the projector in its original packing or equivalent.

Transporting the projector

It is recommended that you ship the projector with its original packing or equivalent. When you carry the projector yourself, please use the original box or a carry bag.

Replacing the filter

In order to prolong the lifetime of your projector and ensure smooth air circulation for efficient lamp cooling, it is important to replace the dust filter periodically (approximately

every 500 hours of use, depending on the air quality of the environment where the projector is installed and used).

BENQ DX819ST - Replacing the filter - 1

  • Be sure to turn OFF the projector and unplug it from power source before replacing the filter.
  • If your projector is ceiling-mounted or is not easily accessible, pay special attention to your personal safety when replacing the dust filter.

To replace the dust filter, follow the steps below:

I. Have the following items ready:

• A suitable cross-head (phillips type) screwdriver
- Spare dust filter (available from your dealer)

BENQ DX819ST - Replacing the filter - 2

natural_image Line drawing of a screwdriver and a rectangular block (no text or symbols)
  1. Locate the dust filter cover on the side of the projector and loosen the four screws using the screwdriver. Keep the screws in a safe place for later use.

BENQ DX819ST - Replacing the filter - 3

text_image Technical diagram of a mechanical device with labeled ports and a screwdriver, showing internal components and directional arrows.
  1. Detach the dust filter cover from the projector.

BENQ DX819ST - Replacing the filter - 4

natural_image Simple line drawing of a projector and its internal components (no text or symbols)
  1. Replace the old (used) filter in the dust filter cover with the spare (new) filter ② Dispose of the old filter properly according to your local regulations.

BENQ DX819ST - Replacing the filter - 5

flowchart
graph TD
    A["①"] --> B["②"]
    B --> C["③"]
  1. Re-install the dust filter cover using the screwdriver and the screws removed in step 2.

BENQ DX819ST - Replacing the filter - 6

text_image Diagram showing a projector and a screwdriver with labeled parts, illustrating the process of lighting or dislocation.

Resetting the filter timer

  1. After the startup logo, open the On-Screen Display (OSD) menu. Go to the SYSTEM SETUP: Basic > Operation Settings menu. Press MODE/ENTER. The Operation Settings page displays. Highlight Reset Filter Timer and press MODE/ENTER. A warning message is displayed asking if you want to reset the filter timer. Highlight Reset and press MODE/ENTER. The filter time will be reset to "0".

BENQ DX819ST - Resetting the filter timer - 1

Do not reset if the filter is not new or replaced as this could cause damage.

Lamp information

Getting to know the lamp hour

When the projector is in operation, the duration (in hours) of lamp usage is automatically calculated by the built-in timer.

Total (equivalent) lamp hour= 2.22 x (hours used in Normal mode) + 1.67 x (hours used in Economic mode) + 1.54 x (hours used in SmartEco mode) + 1.00 x (hours used in LampSave mode)

To obtain the lamp hour information:

I. Press MENU/EXIT and then press ◀/▶ to highlight the SYSTEM SETUP: Advanced menu.
2. Press ▼ to highlight Lamp Settings and press MODE/ENTER. The Lamp Settings page displays.
3. You will see the Equivalent Lamp information displaying on the menu.
4. To leave the menu, press MENU/EXIT.

You can also get the lamp hour information on the INFORMATION menu.

Extending lamp life

The projection lamp is a consumable item that normally can last up to 3000-4000 hours with proper usage. To keep the lamp life as long as possible, you can do the following settings via the OSD menu.

- Setting the Lamp Mode

Setting the projector in Economic, SmartEco or LampSave mode extends the lamp operation life. To set Economic, SmartEco or LampSave mode, go into the SYSTEM SETUP: Advanced > Lamp Settings > Lamp Mode menu and press ◀/▶.

Lamp mode Description
NormalProvides full lamp brightness
EconomicReduces lamp power consumption
SmartEcoDynamically reduces lamp power consumption depending on the content brightness level
LampSaveDynamically reduces lamp power consumption while offering a longer lamp life

- Setting Auto Power Off

This function allows the projector to turn off automatically if no input signal is detected after a set period of time to prevent unnecessary waste of lamp life.

To set Auto Power Off, go into the SYSTEM SETUP: Basic > Operation Settings > Auto Power Off menu and press ◀/▶. If the preset time lengths are not suitable for your presentation, select Disable. The projector will not automatically shut down in a certain time period.

Timing of replacing the lamp

When the Lamp indicator lights up red or a message appears suggesting it is time to replace the lamp, please install a new lamp or consult your dealer. An old lamp may cause a malfunction in the projector and in some instances the lamp may explode.

Go to http://lamp.benq.com for a replacement lamp.

BENQ DX819ST - Timing of replacing the lamp - 1

The LAMP indicator light and TEMP (Temperature) warning light will light up if the lamp becomes too hot. Turn the power off and let the projector cool for 45 minutes. If the Lamp or Temp indicator still lights up after turning the power back on, please contact your dealer. See "Indicators" on page 53 for details.

The following Lamp warning displays will remind you to change the lamp.

Status Message
Install a new lamp for optimal performance. If the projector is normally run withEconomicselected (See "Getting to know the lamp hour" on page 48), you may continue to operate the projector until the next hour lamp warning appears.PressMODE/ENTERto dismiss the message.BENQ DX819ST - Timing of replacing the lamp - 2
It is strongly recommended that you replace the lamp at this age. The lamp is a consumable item. The lamp brightness diminishes with use. This is normal lamp behavior. You can replace the lamp whenever you notice that the brightness level has significantly diminished.PressMODE/ENTERto dismiss the message.BENQ DX819ST - Timing of replacing the lamp - 3BENQ DX819ST - Timing of replacing the lamp - 4
The lamp MUST be replaced before the projector will operate normally.PressMODE/ENTERto dismiss the message.BENQ DX819ST - Timing of replacing the lamp - 5

BENQ DX819ST - Timing of replacing the lamp - 6

"XXXX" shown in the above messages are numbers that vary depending on different models.

Replacing the lamp

BENQ DX819ST - Replacing the lamp - 1

• To reduce the risk of electrical shock, always turn the projector off and disconnect the power cord before changing the lamp.
• To reduce the risk of severe burns, allow the projector to cool for at least 45 minutes before replacing the lamp.
• To reduce the risk of injuries to fingers and damage to internal components, use caution when removing lamp glass that has shattered into sharp pieces.
• To reduce the risk of injuries to fingers and/or compromising image quality by touching the lens, do not touch the empty lamp compartment when the lamp is removed.
- This lamp contains mercury. Consult your local hazardous waste regulations to dispose of this lamp in a proper manner.
• To assure optimal performance from the projector, it is recommended that you purchase a qualified projector lamp for lamp replacement.
- If lamp replacement is performed while the projector is suspended upside-down from the ceiling, make sure that no one is underneath the lamp socket to avoid any possible injury or damage to the human eyes caused by fractured lamp.
- Ensure good ventilation when handling broken lamps. We recommend that you use respirators, safety glasses, goggles or face shield and wear protective clothing such as gloves.

  1. Turn the power off and disconnect the projector from the power outlet. If the lamp is hot, avoid burns by waiting for approximately 45 minutes until the lamp has cooled.

  2. Loosen the screw(s) that secures the lamp cover on the side of the projector until the lamp cover loosens.

BENQ DX819ST - Replacing the lamp - 2

natural_image Line drawing of a projector with a screwdriver inserted, showing internal components and no text or symbols

BENQ DX819ST - Replacing the lamp - 3

  1. Remove the lamp cover from the projector.

  2. Do not turn the power on with the lamp cover removed.

  3. Do not insert your fingers between the lamp and the projector. The sharp edges inside the projector may cause injuries.

  4. Disconnect the lamp connector from the projector as illustrated.

  5. Loosen the screw that secures the lamp.
  6. Lift the handle so that it stands up.

BENQ DX819ST - Replacing the lamp - 4

natural_image Diagram of an open projector with labeled parts (no text or symbols present)

BENQ DX819ST - Replacing the lamp - 5

text_image Technical diagram showing a mechanical assembly with numbered components and directional arrows indicating motion or movement.
  1. Use the handle to slowly pull the lamp out of the projector.

BENQ DX819ST - Replacing the lamp - 6

  • Pulling it too quickly may cause the lamp to break and scatter broken glass in the projector.
  • Do not place the lamp in locations where water might splash on it, children can reach it, or near flammable materials.
  • Do not insert your hands into the projector after the lamp is removed. If you touch the optical components inside, it could cause color unevenness and distortion of the projected images.

BENQ DX819ST - Replacing the lamp - 7

natural_image Illustration of a hand using a tool to adjust or install electronic components (no text or symbols visible)
  1. As shown in the figure, lower the new lamp.

BENQ DX819ST - Replacing the lamp - 8

natural_image Illustration of a hand using a tool to adjust or install a mechanical component (no text or symbols visible)
  1. Reconnect the lamp connector.

  2. Tighten the screw that secures the lamp.

  3. Ensure the handle is fully laid flat and locked in place.

BENQ DX819ST - Replacing the lamp - 9

  • Loose screw may cause a bad connection, which could result in malfunction.
  • Do not over tighten the screw.

BENQ DX819ST - Replacing the lamp - 10

text_image Technical diagram showing a mechanical assembly with numbered components and directional arrows indicating motion or movement.
  1. Replace the lamp cover on the projector.

BENQ DX819ST - Replacing the lamp - 11

natural_image Diagram of an open projector with labeled parts and directional arrows indicating internal components (no text or symbols present)
  1. Tighten the screw(s) that secures the lamp cover.

BENQ DX819ST - Replacing the lamp - 12

  • Loose screw may cause a bad connection, which could result in malfunction.
  • Do not over tighten the screw.

BENQ DX819ST - Replacing the lamp - 13

natural_image Line drawing of a projector with a screwdriver inserted, showing no text or symbols on the device itself.
  1. Connect the power and restart the projector.

BENQ DX819ST - Replacing the lamp - 14

Do not turn the power on with the lamp cover removed.

Resetting the lamp timer

  1. After the startup logo, open the On-Screen Display (OSD) menu. Go to the SYSTEM SETUP: Advanced > Lamp Settings menu. Press MODE/ENTER. The Lamp Settings page displays. Highlight Reset Lamp Timer. A warning message is displayed asking if you want to reset the lamp timer. Highlight Reset and press MODE/ENTER. The lamp time will be reset to "0".

BENQ DX819ST - Resetting the lamp timer - 1

Do not reset if the lamp is not new or replaced as this could cause damage.

Indicators

Light Status & Description
Power events
Orange Off OffStand-by mode.
Green FlashingOff OffPowering up.
Green Off OffNormal operation.
Orange FlashingOff OffNormal power-down cooling
Red Off OffDownload
Green Off RedCW start fail
Red FlashingOff OffScaler shutdown fail (data abort)
Red Red OffLAN download fail
Red Green OffLAN download processing
Green Off OffBurn-in ON
Green Green GreenBurn-in OFF
Lamp events
OffOff RedLamp I error in normal operation
OffOffOrange FlashingLamp is not lit up
Thermal events
Red Red OffFan I error (the actual fan speed is ±25% outside the desired speed)
Red Red FlashingOffFan 2 error (the actual fan speed is ±25% outside the desired speed)
Green Red OffTemperature I error (over limited temperature)

Troubleshooting

? The projector does not turn on.

Cause Remedy
There is no power from the power cord.Plug the power cord into the AC power jack on the projector, and plug the power cord into the power outlet. If the power outlet has a switch, make sure that it is switched on.
Attempting to turn the projector on again during the cooling process.Wait until the cooling down process has completed.

⑦ No picture

Cause Remedy
The video source is not turned on or connected correctly.Turn the video source on and check that the signal cable is connected correctly.
The projector is not correctly connected to the input signal device.Check the connection.
The input signal has not been correctly selected.Select the correct input signal with the SOURCE key on the projector or remote control.
The lens cover is still closed. Open the lenscover.

? Blurred image

Cause Remedy
The projection lens is not correctly focused.Adjust the focus of the lens using the focus ring.
The projector and the screen are not aligned properly.Adjust the projection angle and direction as well as the height of the projector if necessary.
The lens cover is still closed. Open the lenscover.

⑦ Remote control does not work

Cause Remedy
The battery is out of power. Replace the battery with new ones.
There is an obstacle between the remote control and the projector.Remove the obstacle.
You are too far away from the projector.Stand within 8 meters (26 feet) of the projector.

⑦ The password is incorrect

Cause Remedy
You do not remember the password.Please see "Entering the password recall procedure" on page 23 for details.

Specifications

Projector specifications

BENQ DX819ST - Projector specifications - 1

All specifications are subject to change without notice.

Optical

Resolution

1024 x 768 XGA

Display system

1-CHIP DMD

Lens F/Number

F = 2.6, f = 6.9 mm

Lamp

190 W lamp

Electrical

Power supply

AC100-240V, 2.8 A, 50-60 Hz (Automatic)

Power consumption

280 W (Max); < 0.5 W (Standby)

Mechanical

Weight

2.6 Kg (5.73 lbs)

Output terminals

RGB output

D-Sub 15-pin (female) x 1

Speaker

(Stereo) 10 watt x 1

Audio signal output

PC audio jack x 1

Control

RS-232 serial control

9 pin x 1

IR receiver x 2

USB port (Mini-B x 1)

Input terminals

Computer input

RGB input

D-Sub 15-pin (female) x 2

Video signal input

S-VIDEO

Mini DIN 4-pin port x 1

VIDEO

RCA jack x 1

SD/HDTV signal input

Analog - Component RCA jack x 3

(through RGB input)

Digital - HDMI x 1

Audio signal input

Audio in

PC audio jack x 2

RCA audio jack (L/R) x 2

Environmental Requirements

Operating temperature

0°C–40°C at sea level

Operating relative humidity

10%–90% (without condensation)

Operating altitude

0–1499 m at 0°C–35°C

1500–3000 m at 0°C–30°C (with

High Altitude Mode on)

Dimensions
BENQ DX819ST - Environmental Requirements - 1

text_image 232.6

BENQ DX819ST - Environmental Requirements - 2

text_image 320.6 114.4 62 62

Unit: mm

Ceiling mount installation

Ceiling Mount screw: M4

(Max L = 25 mm; Min L = 20 mm)

BENQ DX819ST - Ceiling mount installation - 1

text_image 207.6 76.5 34.5 199.6 77

BENQ DX819ST - Ceiling mount installation - 2

text_image 127.7 SUNH

BENQ DX819ST - Ceiling mount installation - 3

text_image 626.6 577.7 537.9 117.5 180.1 320.5

BENQ DX819ST - Ceiling mount installation - 4

text_image 66.1 125.6 241.1

Unit: mm

Wall mount installation

Minimum installation requirements

Computer Resolution: XGAImage Resolution: XGADiagram ReferenceSMART Board 660Smart Board 680Promethean ActivBoard 164Promethean ActivBoard 178RM ClassBoard2 77.5Hitachi StarBoard FX-63StarBoard FX-77
Image Diagonal (inches)D6477 647 8
Image Height (mm)H 9751173 9751189 1181 960 1173
Image Width (mm)W1300156513001585157512801565
Distance from floor to bottom of image (mm)f900900900900900900900
Distance from screen surface to projector rear case (mm)a790950790970970780950
Distance from top case to the top of image (mm)b941249412612692124
Distance from top of wall mount to ceiling (mm)c50505050505050
Minimum Ceiling Height (mm)e2347257523472593258523302575
Computer Resolution: WXGAImage Resolution: WXGADiagram ReferenceSMART Board 685Promethean ActivBoard 387Hitachi FX-TRIO-88WHitachi FX-DUO-88W
Image Diagonal (inches)D8787
Image Height (mm)H |17||17| |18||18|
Image Width (mm)W |874|874 |887|887
Distance from floor to bottom of image (mm)f 900 900900 900 900
Distance from screen surface to projector lens (mm)a 916 916926 926
Distance from top case to the top of image (mm)b 6.8 6.87.5 7.5
Distance from top of wall mount to ceiling (mm)c50505050
Minimum Ceiling Height (mm)e 2461.82461.82472.52472.5

Minimum Ceiling Height (mm) = f + H + b + 60 + 274 + c
BENQ DX819ST - Wall mount installation - 1

text_image Ceiling 60 274 a b 232.6 H screen D Projection area W f Distance from floor to bottom of image floor e 20 60 150 180 Wall plate

BENQ DX819ST - Wall mount installation - 2

• The dimensions are based on the BenQ wall mount (P/N: 5J.J4R10.001).
- All measurements are approximate and may vary from the actual sizes. BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location.
- The dimensions supplied are offered as a guide only and may differ depending on several factors relating to any specific installation.
• The dimensions are based on the projector being configured with zero keystone correction.
- The dimensions assume that the wall mount arm is positioned 90^ from the bottom case of projector and screen surface.

Timing chart

Supported timing for PC input

Resolution ModeVertical Frequency (Hz)Horizontal Frequency (kHz)Pixel Frequency (MHz)
640 x 480VGA_60*59.94031.46925.175
VGA_7272.80937.86131.500
VGA_7575.00037.50031.500
VGA_8585.00843.26936.000
720 x 400 720 x 400_70 70.087 31.469 28.3221
800 x 600SVGA_60*60.31737.87940.000
SVGA_7272.18848.07750.000
SVGA_7575.00046.87549.500
SVGA_8585.06153.67456.250
SVGA_120** (Reduce Blanking)119.85477.425 83.000
1024 x 768XGA_60*60.00448.36365.000
XGA_7070.06956.47675.000
XGA_7575.02960.02378.750
XGA_8584.99768.66794.500
XGA_120** (Reduce Blanking)119.98997.551 115.5
1152 x 8641152 x 864_757567.5108
1024 x 576BenQ Notebook Timing60.035.820 46.966
1024 x 600BenQ Notebook Timing64.995 41.467 51.419
1280 x 7201280 x 720_60*6045.00074.250
1280 x 7681280 x 768_60*59.87047.77679.5
1280 x 800WXGA_60*59.810 49.702 83.500
WXGA_7574.934 62.795 106.500
WXGA_8584.880 71.554 122.500
WXGA_120** (Reduce Blanking)119.909101.563146.25
1280 x 1024SXGA_60***60.02063.981108.000
SXGA_7575.025 79.976 135.000
SXGA_8585.024 91.146 157.500
1280 x 9601280 x 960_60***60.000 60.000108
1280 x 960_8585.002 85.938 148.500
1360 x 7681360 x 768_60***60.015 47.712 85.500
1440 x 900WXGA+_60***59.887 55.935 106.500
1400 x 1050SXGA+_60***59.978 65.317 121.750
1600 x 1200UXGA***60.000 75.000 162.000
1680 x 10501680x1050_60***59.95465.29146.25
640 x 480@67HzMAC1366.667 35.000 30.240
832 x 624@75HzMAC1674.546 49.722 57.280
1024 x 768@75HzMAC1975.0260.24180.000
1152 x 870@75HzMAC2175.0668.68100.00

BENQ DX819ST - Timing chart - 1
• *Supported timing for 3D signal in Frame Sequential, Top Bottom and Side by Side formats.
**Supported timing for 3D signal in Frame Sequential format.
***Supported timing for 3D signal in Top Bottom and Side by Side formats.

- The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is possible that some timings cannot be chosen.

Supported timing for HDMI (HDCP) input

Resolution ModeVertical Frequency (Hz)Horizontal Frequency (kHz)Pixel Frequency (MHz)
640 x 480VGA_60*59.94031.46925.175
VGA_7272.80937.86131.500
VGA_7575.00037.50031.500
VGA_8585.00843.26936.000
720 x 400 720 x 400_70 70.087 31.46928.3221
800 x 600SVGA_60*60.31737.87940.000
SVGA_7272.18848.07750.000
SVGA_7575.00046.87549.500
SVGA_8585.06153.67456.250
SVGA_120** (Reduce Blanking)119.854 77.425 83.000
1024 x 768XGA_60*60.00448.36365.000
XGA_7070.06956.47675.000
XGA_7575.02960.02378.750
XGA_8584.99768.66794.500
XGA_120** (Reduce Blanking)119.989 97.551 115.5
1152 x 8641152 x 864_7575 67.5108
1024 x 576@60HzBenQ Notebook Timing60.0035.82046.996
1024 x 600@65HzBenQ Notebook Timing64.995 41.467 51.419
1280 x 7201280 x 720_60*6045.00074.250
1280 x 7681280 x 768_60*59.87047.77679.5
1280 x 800WXGA_60*59.81049.702 83.500
WXGA_75 74.93462.795 106.500
WXGA_85 84.88071.554 122.500
WXGA_120** (Reduce Blanking)119.909101.563 146.25
1280 x 1024SXGA_60***60.02063.981108.000
SXGA_75 75.02579.976 135.000
SXGA_85 85.02491.146 157.500
1280 x 9601280 x 960_60***60.000 60.000 108
1280 x 960_8585.002 85.938 148.500
1360 x 7681360 x 768_60***60.01547.71285.500
1440 x 900WXGA+_60***59.887 55.935 106.500
1400 x 1050 SXGA+_60***59.978 65.317 121.750
1600 x 1200 UXGA***60.000 75.000162.000
1680 x 10501680x1050_60***59.954 65.290 146.250
640 x 480@67HzMAC1366.66735.00030.240
832 x 624@75HzMAC1674.54649.72257.280
1024 x 768@75HzMAC1974.9360.24180.000
1152 x 870@75HzMAC2175.0668.68100.00

BENQ DX819ST - Timing chart - 2
• *Supported timing for 3D signal in Frame Sequential, Top Bottom and Side by Side formats.
**Supported timing for 3D signal in Frame Sequential format.
***Supported timing for 3D signal in Top Bottom and Side by Side formats.
- The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is possible that some timings cannot be chosen.

Timing ResolutionVertical Frequency (Hz)Horizontal Frequency (kHz)Pixel Frequency (MHz)Remark
480i* 720x 480 59.94 15.7327 HDMI only
480p* 720x 480 59.94 31.4727 HDMI only
576i 720x 576 50 15.63 27HDMI/DVI
576p 720x 576 50 31.25 27HDMI/DVI
720/50p****1280 x 7205037.574.25HDMI/DVI
720/60p****1280 x 7206045.0074.25HDMI/DVI
1080/50i***1920 x 1080 5028.13 74.25HDMI/DVI
1080/60i***1920 x 1080 6033.75 74.25HDMI/DVI
1080/24P****1920 x 1080242774.25HDMI/DVI
1080/25P1920 x 10802528.1374.25HDMI/DVI
1080/30P1920 x 10803033.7574.25HDMI/DVI
1080/50P**1920 x 10805056.25148.5HDMI/DVI
1080/60P**1920 x 10806067.5148.5HDMI/DVI

BENQ DX819ST - Timing chart - 3

*Supported timing for 3D signal in Frame Sequential format.

**Supported timing for 3D signal in Top Bottom format.

***Supported timing for 3D signal in Side by Side format.

****Supported timing for 3D signal in Frame Packing, Top Bottom and Side by Side formats.

*****Supported timing for 3D signal in Frame Sequential, Frame Packing, Top Bottom and Side by Side formats.

Supported timing for Component-YPbPr input

Timing ResolutionVertical Frequency (Hz)Horizontal Frequency (kHz)Pixel Frequency (MHz)
480i*720 x 48059.9415.7313.5
480p* 720 x480 59.9431.4727
576i 720 x576 5015.6313.5
576p720 x 5765031.2527
720/50p1280 x 720 5037.574.25
720/60p* 1280 x 720 6045.0074.25
1080/50i1920 x 10805028.1374.25
1080/60i1920 x 10806033.7574.25
1080/24P1920 x 1080242774.25
1080/25P1920 x 10802528.1374.25
1080/30P1920 x 10803033.7574.25
1080/50P1920 x 10805056.25148.5
1080/60P1920 x 10806067.5148.5

BENQ DX819ST - Timing chart - 4

• *Supported timing for 3D signal in Frame Sequential format.

• Displaying a 1080i(1125i)@60Hz or 1080i(1125i)@50Hz signal may result in slight image vibration.

Supported timing for Video and S-Video inputs

Video modeHorizontal Frequency (kHz)Vertical Frequency (Hz)Color sub-carrier Frequency (MHz)
NTSC* 15.73 603.58
PAL 15.63 504.43
SECAM 15.63 504.25 or 4.41
PAL-M 15.73 603.58
PAL-N 15.63 503.58
PAL-60 15.73 604.43
NTSC4.43 15.7360 4.43

BENQ DX819ST - Timing chart - 5

*Supported timing for 3D signal in Frame Sequential format.

Limited warranty

BenQ warrants this product against any defects in material and workmanship, under normal usage and storage.

Proof of purchase date will be required with any warranty claim. In the event this product is found to be defective within the warranty period, BenQ's only obligation and your exclusive remedy shall be replacement of any defective parts (labor included). To obtain warranty service, immediately notify the dealer from which you purchased the product of any defects.

Important: The above warranty shall be void if the customer fails to operate the product in accordance with BenQ's written instructions, especially the ambient humidity must be in-between 10% and 90%, temperature in-between 0°C and 35°C, altitude lower than 4920 feet, and avoiding to operate the projector in a dusty environment. This warranty gives you specific legal rights, and you may have other rights which vary from country to country.

For other information, please visit www.BenQ.com.

Copyright 2013 by BenQ Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of BenQ Corporation.

Disclaimer

BenQ Corporation makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties, merchantability or fitness for any particular purpose. Further, BenQ Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation to notify any person of such revision or changes.

*DLP, Digital Micromirror Device and DMD are trademarks of Texas Instruments. Others are copyrights of their respective companies or organizations.

Patents

This BenQ projector is covered by the following patents:

U.S. patents 6,837,608; 7,275,834; 7,181,318. TW patents 202690; 205470; I228635; I259932.

China patents (中国发明专利) ZL01143168.7; ZL03119907.0; ZL200510051609.2

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Product information

Brand : BENQ

Model : DX819ST

Category : Video projector