ViewSonic VS18021 User manual

LS831WU
Projector
User Guide
Model No. VS18021
P/N: LS831WU
IMPORTANT: Please read this User Guide to obtain important information on installing and using your product
in a safe manner, as well as registering your product for future service. Warranty information contained in this
User Guide will describe your limited coverage from ViewSonic Corporation, which is also found on our web site at
http://www.viewsonic.com in English, or in specific languages using the Regional selection box in the upper right
corner of our website. “Antes de operar su equipo lea cu idadosamente las instrucciones en este manual”

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Thank you for choosing ViewSonic®
As a world-leading provider of visual soluons, ViewSonic® is dedicated to exceeding the
world’s expectaons for technological evoluon, innovaon, and simplicity. At ViewSonic®,
we believe that our products have the potenal to make a posive impact in the world, and
we are condent that the ViewSonic® product you have chosen will serve you well.
Once again, thank you for choosing ViewSonic®!

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Safety Precautions - General
Please read the following Safety Precautions before you start using the projector.
• Keep this user guide in a safe place for later reference.
• Read all warnings and follow all instructions.
• Allow at least 20“ (50 cm) clearance around the projector to ensure proper
ventilation.
• Place the projector in a well-ventilated area. Do not place anything on the
projector that prevents heat dissipation.
• Do not place the projector on an uneven or unstable surface. The projector may
fall over, causing personal injury or projector malfunction.
• Do not use if the projector is tilted at an angle of more than 10° degrees left or
right, nor at an angle of more than 15° degrees forwards or backwards.
• Do not look straight at the projector lens during operation. The intense light
beam may damage your eyes.
• Always open the lens shutter or remove the lens cap when the projector light
source is on.
• Do not block the projection lens with any objects when the projector is under
operation as this could cause objects to become heated and deformed or even
cause a fire.
• The light source becomes extremely hot during operation. Allow the projector to
cool for approximately 45 minutes prior to removing the light source assembly
for replacement.
• Do not use light sources beyond the rated light source life. Excessive use of light
sources beyond the rated life could cause them to break on rare occasions.
• Never replace the light source assembly or any electronic component unless the
projector is unplugged.
• Do not attempt to disassemble the projector. There are dangerous high voltages
inside which may cause death if you should come into contact with live parts.
• When moving the projector, be careful not to drop or bump the projector on
anything.
• Do not place any heavy objects on the projector or connection cables.
• Do not stand the projector on end vertically. Doing so may cause the projector
to fall over, causing personal injury or projector malfunction.
• Avoid exposing the projector to direct sunlight or other sources of sustained
heat. Do not install near any heat sources such as radiators, heat registers,
stoves, or other devices (including amplifiers) that may increase the
temperature of the projector to dangerous levels.
• 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 and call your local service center to have the projector serviced.

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• When the projector is under operation, you may sense some heated air and
odor from its ventilation grill. It is a normal operation and not a defect.
• Do not attempt to circumvent the safety provisions of the polarized or
grounding-type plug. A polarized plug has two blades with one wider than the
other. A grounding-type plug has two blades and a third grounding prong. The
wide and third blade are provided for your safety. If the plug does not fit into
your outlet, obtain an adapter and do not attempt to force the plug into the
outlet.
• When connecting to a power outlet, DO NOT remove the grounding prong.
Please ensure grounding prongs are NEVER REMOVED.
• Protect the power cord from being treaded upon or pinched, particularly at the
plug, and at the point where it emerges from the projector.
• In some countries, the voltage is NOT stable. This projector is designed to
operate safely within a voltage between 100 to 240 volts AC, but could fail if
power cuts or surges of ±10 volts occur. In areas where voltage may fluctuate
or cut out, it is recommended that you connect your projector through a power
stabilizer, surge protector, or uninterruptable power supply (UPS).
• If smoke, an abnormal noise, or a strange odor is present, immediately switch
the projector off and call your dealer or ViewSonic®. It is dangerous to continue
using the projector.
• Use only attachments/accessories specified by the manufacturer.
• Disconnect the power cord from the AC outlet if the projector is not being used
for a long period of time.
• Refer all servicing to qualified service personnel.
CAUTION: Possibly hazardous optical radiation is emitted from this product. As
with any bright light source, do not stare into the beam,
RG2 IEC 62471-5:2015.

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Safety Precautions - Ceiling Mounting
Please read the following Safety Precautions before you start using the projector.
If you intend to mount the projector on the ceiling, we strongly recommend
that you use a proper fitting projector ceiling mount kit and that you ensure it is
securely and safely installed.
If you use an inappropriate 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 projector ceiling mount kit from the place you purchased your
projector. We recommend that you also purchase a separate security cable and
attach it securely to both the anti-theft 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.
Laser Caution
This product belongs to CLASS I laser product and complies with IEC 60825-1:2014.
Above laser cautions are located on the bottom of this apparatus.
(for all regions except China)
• Noce is given to supervise children and to never allow them to stare into the
projector beam at any distance from the projector.
• Noce is given to use cauon when using the remote control for starng the
projector while in front of the projecon lens.
• Noce is given to the user to avoid the use of opcal aids such as binoculars or
telescopes inside the beam.

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Contents
Safety Precautions - General ....................................... 3
Introduction .............................................................. 10
Features................................................................................................................10
Package Contents .................................................................................................10
Product Overview.................................................................................................11
Projector................................................................................................................ 11
Controls and Functions ............................................................................................... 11
Connection Ports......................................................................................................... 12
Remote Control..................................................................................................... 13
Controls and Functions ............................................................................................... 13
Remote Control Effective Range................................................................................. 14
Replacing the Remote Control Batteries..................................................................... 14
Initial Setup............................................................... 15
Choosing a Location..............................................................................................15
Projection Dimensions..........................................................................................16
16:10 Image on a 16:10 Screen................................................................................... 16
16:10 Image on a 4:3 Screen....................................................................................... 17
Mounting the Projector........................................................................................18
Preventing Unauthorized Use...............................................................................19
Using the Security Slot .......................................................................................... 19
Using the Password Function................................................................................ 20
Setting a Password...................................................................................................... 20
Changing the Password............................................................................................... 21
Disabling the Password Function ................................................................................ 21
Forgetting the Password............................................................................................. 22
Password Recall Procedure......................................................................................... 22
Locking the Control Keys....................................................................................... 23

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Making Connections.................................................. 24
Connecting to Power ............................................................................................24
Connecting to Video Sources................................................................................25
HDMI Connection.................................................................................................. 25
S-Video Connection............................................................................................... 26
Composite Video Connection................................................................................ 27
Connecting to Computer Sources.........................................................................28
VGA Connection .................................................................................................... 28
VGA Out Connection ............................................................................................. 28
Connecting to Audio.............................................................................................29
Operation.................................................................. 30
Turning the Projector On/Off ...............................................................................30
Starting Up the Projector ...................................................................................... 30
First Time Activation ................................................................................................... 30
Shutting Down the Projector................................................................................. 31
Selecting an Input Source.....................................................................................32
Adjusting the Projected Image .............................................................................33
Adjusting the Projector's Height and Projection Angle............................................... 33
Auto-Adjusting the Image ........................................................................................... 33
Fine-Tuning the Image Size and Clarity ................................................................. 33
Correcting Keystone.............................................................................................. 34
Hiding the Image ..................................................................................................35
Controlling the Projector through a LAN Environment ........................................36
Configuring the LAN Control Settings.................................................................... 36
Controlling the Projector through a Web Browser ............................................... 38
About Crestron e-Control®.................................................................................... 42
PJLink™, SNMP, AMX and Xpanel Formats Supported.......................................... 45
Menu Functions ........................................................ 46
General On-Screen Display (OSD) Menu Operation .............................................46
On-Screen Display (OSD) Menu Tree....................................................................47
DISPLAY Menu ......................................................................................................54
IMAGE Menu ........................................................................................................57
POWER MANAGEMENT Menu .............................................................................61
BASIC Menu..........................................................................................................64
ADVANCED Menu .................................................................................................67
SYSTEM Menu.......................................................................................................71
INFORMATION Menu ...........................................................................................73

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Appendix................................................................... 74
Specifications........................................................................................................74
Projector Dimensions............................................................................................ 75
Timing Chart .........................................................................................................75
Analog RGB............................................................................................................ 75
HDMI (PC).............................................................................................................. 77
HDMI (Video)......................................................................................................... 78
Video/S-Video ....................................................................................................... 79
Component video.................................................................................................. 79
IR Control Table ....................................................................................................80
Address Code........................................................................................................81
RS-232 Command Table .......................................................................................82
Pin Assignment...................................................................................................... 82
Interface................................................................................................................ 82
Command Table .................................................................................................... 82
Glossary ................................................................................................................90
Troubleshooting ...................................................................................................93
Common Problems................................................................................................ 93
LED Indicators........................................................................................................ 94
Maintenance.........................................................................................................95
General Precautions.............................................................................................. 95
Cleaning the Lens .................................................................................................. 95
Cleaning the Case.................................................................................................. 95
Storing the Projector............................................................................................. 95
Disclaimer.............................................................................................................. 95
Light Source Information......................................................................................96
Light Source Hour.................................................................................................. 96
Extending Light Source Life ................................................................................... 96

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Regulatory and Service Information .......................... 97
Compliance Information.......................................................................................97
FCC Compliance Statement................................................................................... 97
Industry Canada Statement................................................................................... 97
CE Conformity for European Countries ................................................................. 97
Declaration of RoHS2 Compliance......................................................................... 98
Indian Restriction of Hazardous Substances ......................................................... 99
Product Disposal at End of Product Life................................................................ 99
Copyright Information ........................................................................................100
Customer Service ................................................................................................ 101
Limited Warranty ................................................................................................ 102
Mexico Limited Warranty.................................................................................... 105

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The ViewSonic LS831WU shine bright in virtually any environment with 4,500 ANSI
Lumens of high-brightness projection and WUXGA resolution clarity. The projector
comes equipped with the latest laser phosphor technology capable of achieving up
to 20,000 hours of maintenance free projection and 24/7 continuous operation to
provide a reliable solution for public use. With its 0.25 ultra-short throw ratio, H/V
keystone correction and four-corner adjustment, it provides amazing flexibility.
Perfect for creative installations, these projectors also include a 360-degree
orientation function that allows them to be installed in just about any position and
angle from floor to ceiling. Along with these features, the ViewSonic LS831WU
offers flexible connectivity options including a one-wire HDBaseT input, which
allows the projectors to receive HD video and audio over long distances (up to 200
feet) through a single network cable.
Features
• 0.25 Ultra short throw for 21 cm short distance placement with 100” projecon
image
• 2nd generaon laser phosphor technology
• Up to 4,500 ANSI Lumens
• 20,000 hours of maintenance free projecon
• Built-in HDBaseT receiver
• 360-degree projecon
• 24/7 operaon
Package Contents
• Projector
• Power Cord
• Video Cable
• Remote Control & Baeries
• Quick Start Guide
NOTE: The power cord and video cables included in your package may vary depending
on your country. Please contact your local reseller for more informaon.
Introduction

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Product Overview
Projector
Power Indicator Light
Temperature Indicator Light
Light Source Indicator Light
Projection Lens
Remote IR sensor
Power key
Controls and Functions
Key Description
[ ] Power Toggles the projector between standby mode and Power On.
[/ / / ] Keystone
Keys
Manually corrects distorted images resulting from an angled
projection.
[/ / / ]
Left/Right/Up/Down
Selects the desired menu items and makes adjustments when
the On-Screen Display (OSD) Menu is activated.
Menu/Exit Turns on or off the On-Screen Display (OSD) Menu.
Source Displays the input source selection bar.
(Help) Displays the HELP menu with a long press for 3 seconds.
Focus Displays the Lens Focus menu.
Enter Enacts the selected On-Screen Display (OSD) Menu item when
the OSD Menu is activated.
[] Corner Adjustment Displays the Corner Adj. menu when the OSD menu is not
activated.
Color Mode Displays the color mode selection bar.

1212
Connection Ports
1 2 3 4 5 6 87 11 13
12 14
16
10 15
9
AC Power Cord Inlet
Ceiling Mount
Holes
Security Slot
Security Bar
Adjuster Feet
Port Description
[1] RJ-45 LAN port.
[2] HDBase T HDBaseT port.
[3] HDMI 1 HDMI port.
[4] HDMI 2 HDMI port.
[5] USB 5V/1.5A OUT (Service) USB Type A port for power supply and serivce.
[6] COMPUTER IN RGB (PC) signal input socket.
[7] MONITOR OUT RGB (PC) signal output socket.
[8] RS-232 RS-232 control port.
[9] S-VIDEO S-Video port.
[10] VIDEO Composite video port.
[11] AUDIO IN (R) Audio signal (right) input socket.
[12] AUDIO IN (L) Audio signal (left) input socket.
[13] AUDIO IN Audio signal input socket.
[14] AUDIO OUT Audio signal output socket.
[15] 3D VESA 3D VESA port.
[16] 12V OUT 12V DC output terminal.

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Remote Control
Controls and Functions
Button Description
On/ Off Toggles between standby
mode and Power On.
COMP
Selects the source from the
COMPUTER INport for display.
HDMI
Selects the source from the
HDMI 1/HDMI 2 port for
display.
HDBaseT Selects the source from the
HDBaseT port for display.
Auto Sync Automatically determines
the best picture timings for
the displayed image.
Source Displays the source selection
bar.
[ / / / ]
Keystone Keys
Manually corrects distorted
images resulting from an
angled projection.
Enter Enacts the selected OSD
Menu item.
(Corner
adjustment)
Displays the Corner Adj.
menu when the OSD menu is
not activated.
Button Description
Left/ Right
Up/ Down
Selects the desired menu
items and makes adjustments.
Menu Turns on/off the On-Screen
Display (OSD) Menu or goes
back to previous OSD Menu.
(Laser)
Emits visible laser pointer light
for presentation purposes.
Exit
Exits and saves menu settings.
Focus
Displays the Lens Focus menu.
(INFORMATION)
Displays the INFORMATION
menu.
Network Displays the
LAN Control Settings menu.
(Aspect) Displays the aspect ratio
selection bar.
Pattern Displays embedded test
pattern.
Blank Hides the screen picture.
PgUp (Page Up)/
PgDn (Page
Down)
Operates your display
software program (on a
connected PC) which responds
to page up/down commands
(like Microsoft PowerPoint).
NOTE: Only available when
a PC input signal is
selected.
(Help) Displays the HELP menu.
(Presentation
Timer)
Displays the
Presentation Timer menu.
Eco Mode Selects the Eco mode.
(Volume Up) Increases the volume level.
(Volume Down)
Decreases the volume level.
(Mute) Toggles audio between on
and off.
Color Mode Displays the color mode
selection bar.
Magnifies the projected
picture size.
Reduces the projected
picture size.
Audio Mode Displays the Audio Settings
menu.

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Remote Control Effective Range
To ensure proper function of the remote control
follow the steps below:
1. The remote control must be held at an angle
within 30° perpendicular to the projector’s IR
remote control sensor(s).
2. The distance between the remote control and
the sensor(s) should not exceed 8 m (26 ft.)
NOTE: Refer to the illustration for the location of
the infrared (IR) remote control sensor(s).
Approx. 30°
Replacing the Remote Control Batteries
1. Remove the battery cover from the rear of the remote control by pressing the
finger grip and sliding it down.
2. Remove any existing batteries (if necessary) and install two AAA batteries.
NOTE: Observe the battery’s polarities as indicated.
3. Replace the battery cover by aligning it with the base and pushing it back into
position.
NOTE:
• Avoid leaving the remote control and batteries in excessive heat or a humid
environment.
• 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.
• If the batteries are drained 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.

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Initial Setup
This section provides detailed instructions for setting up your projector.
Choosing a Location
Personal preference and room layout will decide the installation location. Consider
the following:
• Size and Position of your screen.
• Location of a suitable power outlet.
• Location and Distance between the projector and other equipment.
The projector is designed to be installed in one of the following locations:
1. Front
The projector is placed near the floor in
front of the screen.
2. Front Ceiling
The projector is suspeneded upside-
down from the ceiling in front of the
screen.
3. Rear Ceiling
The projector is suspended upside-down
from the ceiling behind the screen.
NOTE: A special rear projection screen
is required.
4. Rear
The projector is placed near the floor
behind the screen.
NOTE: A special rear projection screen
is required.

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Projection Dimensions
NOTE: See “Specifications” on page 74 for the native display resolution of this
projector.
• 16:10 Image on a 16:10 Screen
• 16:10 Image on a 4:3 Screen
NOTE: (e) = Screen / (f) = Center of Lens
16:10 Image on a 16:10 Screen
(a) Screen Size (b) Projection
Distance
(c) Image Height (d) Vertical Offset
in. cm in. cm in. cm in. cm
70 178 2.34 5.933 37.10 94.2 5.8 14.8
80 203 4.33 10.989 42.40 107.7 7.0 17.7
90 229 6.32 16.045 47.70 121.2 8.1 20.7
100 254 8.31 21.101 53.00 134.6 9.3 23.6
110 279 10.30 26.156 58.30 148.1 10.5 26.6
120 305 12.29 31.212 63.60 161.5 11.6 29.6
130 330 14.28 36.268 68.90 175.0 15.2 38.5
140 356 16.27 41.324 74.20 188.5 16.3 41.5
150 381 18.26 46.380 79.50 201.9 17.5 44.4
160 406 20.25 51.435 84.80 215.4 18.7 47.4
170 432 22.24 56.491 90.10 228.9 19.8 50.3
180 457 24.23 61.547 95.40 242.3 21.0 53.3
190 483 26.22 66.603 100.70 255.8 22.2 56.3
200 508 28.21 71.659 106.00 269.2 23.3 59.2

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16:10 Image on a 4:3 Screen
(a) Screen Size (b) Projection
Distance
(c) Image Height (d) Vertical Offset
in. cm in. cm in. cm in. cm
70 178 3.7 9.5 35.0 88.9 5.4 13.6
80 203 5.8 14.8 40.0 101.6 6.5 16.4
90 229 7.9 20.1 45.0 114.3 7.6 19.2
100 254 10.0 25.4 50.0 127.0 8.7 22.0
110 279 12.1 30.7 55.0 139.7 9.8 24.8
120 305 14.1 35.9 60.0 152.4 10.9 27.6
130 330 16.2 41.2 65.0 165.1 12.0 30.4
140 356 18.3 46.5 70.0 177.8 13.1 33.1
150 381 20.4 51.8 75.0 190.5 14.2 35.9
160 406 22.5 57.1 80.0 203.2 15.3 38.7
170 432 24.5 62.4 85.0 215.9 16.4 41.5
180 457 26.6 67.6 90.0 228.6 17.5 44.3
190 483 28.7 72.9 95.0 241.3 18.6 47.1
200 508 30.8 78.2 100.0 254.0 19.7 49.9
NOTE: There is a 3% tolerance among these numbers due to optical component
variations. It is recommended to physically test the projection size and
distance before permanently installing the projector.

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Mounting the Projector
NOTE: If you buy a third-party mount, please use the correct screw size. Screw size
can vary depending on the thickness of the mounting plate.
1. To ensure the most secure installation, please use a ViewSonic® wall or ceiling
mount.
2. Ensure the screws used to attach a mount to the projector meet the following
specifications:
• Screw type: M4
• Screw length: 12.8 mm ~ 15.8 mm
174.19 72.17
196.46
98.53
308.33
346.34
NOTE:
• Avoid installing the projector near a heat source.
• Keep at least a 10 cm gap between the ceiling and the bottom of the
projector.

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Preventing Unauthorized Use
The projector has several built-in security features to prevent theft, access, or
accidental setting changes.
Using the Security Slot
To help prevent the projector from being stolen, use a security slot locking device
to secure the projector to a fixed object.
Below is an example of setting up a security slot locking device:
NOTE: The security slot can also be used as a safety anchor if the projector is
mounted to the ceiling.

2020
Using the Password Function
To help prevent unauthorized access or use, the projector offers a password
security option. The password can be set through the On-Screen Display (OSD)
Menu.
NOTE: Make note of your password, and keep it in a safe place.
Setting a Password
1. Press Menu to open the OSD Menu and go to: SYSTEM > Security Settings and
press Enter.
2. Highlight Power On Lock and select
On by pressing / .
3. As pictured to the right, the four
arrow keys ( , , , ) represent
4 digits (1, 2, 3, 4). Press the arrow
keys to enter a six digit password.
4. Confirm the new password by re-entering the new password. Once the password
is set, the OSD Menu will return to the Security Settings page.
5. Press Exit to leave the OSD Menu.
NOTE: Once set, the correct password must be entered every time the projector is
started.