ABT-EM Trapdoor ElectriMask
Electriscreen
O W N E R ’ S
M A N U A L
To the Owner
Installation Instructions
Operating the Screen
Maintenance
ABT-EM-1005
TO T H E I N S TA L L E R : BE S U R E TO L E AV E T H I S M A N U A L W I T H T H E O W N E R .
ABT-EM Trapdoor
ElectriMask Electriscreen
O W N E R ’ S
M A N U A L
Contents
To the Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Preparing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Step 1. Hanging the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Step 2. Electrical Hook-up . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operating the Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Adjusting the Screen Extension . . . . . . . . . . . . . . . . . . . . . . .14
Screen Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
1
TO THE OWNER
Congratulations on your purchase of the finest optical viewing screen
available anywhere in the world!
Please take a moment to review this manual, it will help ensure you many
years of trouble-free service from your new Stewart Filmscreen product.
About your ABT-EM Trapdoor ElectriMask Electriscreen
Your ABT-EM ElectriMask Electriscreen offers the most technologically
advanced trapdoor roller screen in the world. The hingeless door is
powered by its own motor. Sound dampers ensure quiet operation.
The ElectriMask system is designed to integrate with the latest multi-format
video projectors, which are capable of variable sizes and aspect ratios for
viewing standard broadcast television and the wide format seen in
commercial theaters (“letterbox”). The term aspect ratio refers to the format
(width to height) in which your home cinema sources are produced.
Your screen is equipped with either a vertical masking system to achieve a
1.33:1 aspect ratio (see Figure 1) or a horizontal masking system to achieve
a 1.85:1 aspect ratio (see Figure 2).
Figure 1: Vertical masking system
1.33:1
1.85:1 Format Screen
Standard
Video NTSC
Format
Converts to
Figure 2: Horizontal masking system
1.33:1
Converts to
Standard
Video NTSC
Format
1.85:1 Format
“Letterbox”
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Stewart Filmscreen Corporation
PREPARING THE INSTALLATION
‹ Before proceeding with the installation of this screen,
take time to thoroughly read and understand these
installation and operation instructions.
‹ All electrical wiring installations must conform to local
and national codes and should be performed by
qualified service personnel.
‹ There are no user-serviceable parts contained within
the unit.
Preparation
Specifications regarding the individual screen dimensions, weight, mounting
type, and controls are provided by the factory when the unit is ordered.
Before beginning the installation:
‹ Check the specifications for the type of mounting and switch
control to be used.
‹ Ensure that the mounting area and electrical connection are
prepared.
‹ Check the size and weight of the screen to be installed so that
you can plan for the number of people required for the mounting
procedure. You need at least two people to mount the smaller
screens; more are needed for larger, heavier screens.
You will need:
‹ Enough ladders for the personnel supporting the screen during
the mounting process
‹ A level
‹ Fasteners appropriate for the surface on which the screen is
being mounted (See instructions for the type of mount for
recommendations.)
‹ A 5/32” (.4 cm) hex head or Allen wrench
Caution
During installation, do not place the unit on an unstable
cart, stand, table, or ladder. The unit may fall, causing injury
to a child or adult and damage to the unit.
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
3
Unpacking
1. DO NOT remove the paper hanging from the trapdoor at this
time. You should remove it only after the unit is hung, all electrical
connections have been made, and the screen is in operation.
2. When moving the unit, make sure not to torque or twist the case.
This can cause door alignment problems.
Factory Advisory
The factory advises against installing a concealed or
recessed electrical projection screen permanently. You
must be able to access the external end plates should
future service to the internal roller tube/screen assembly
system be necessary.
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Stewart Filmscreen Corporation
STEP 1. HANGING THE CASE
Professional mounting techniques should be used. Stewart Filmscreen
Corporation cannot be liable for substandard or faulty installations.
Make sure that you mount the screen so that the electrical box is on the left
side (audience left).
Installing the unit
The ABT-EM Electriscreen is ready to install into the ceiling or soffit. A false
ceiling is not intended to support the weight of an ABT-EM Electriscreen.
The screen can be bolted directly to the support structure or suspended. If
the unit is to be mounted to plaster, drywall, masonry, or other type of
surface, use an appropriate fastener.
1. Install the unit onto the support structure making sure that the
bottom of the case is flush with the finished ceiling.
2. Make sure the unit is level.
3. Make sure the case is not twisted or torqued lengthwise when
installed. (This can cause door alignment problems and
microswitch shutoff failure.)
4. Drywall or other ceiling material may be screwed directly to the
ceiling flanges on the case. Refer to Figure 3.
Support Structure
Note: The two toggle
switches are used by the
factory only. Do not adjust.
(For proper positioning, the
left switch should be flipped
toward the unit, the right
switch should be straight up.)
Main AC Wire
Flange
Electrical Connection
Housing
Note: Your housing may differ
based on the switches used.
Trapdoor
Figure 3: ABT-EM Electriscreen-side view
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
Screen
Mask
5
STEP 2. ELECTRICAL HOOK-UP
The ABT-EM Electriscreen has two roller tubes within the screen unit—one
for the main screen and one for the mask. Each roller has its own motor
and functions independently.
Caution
Professional techniques should be used when making any
electrical connection. A qualified electrician should perform
these procedures.
Be sure to follow all standard safety procedures for
installing electrical devices.
Do not disassemble or alter the configuration of the motor
or the unit's electrical connections. This may cause injury to
you or damage to the product.
The electrical connection should be made only to the type
of power source indicated on the marking label.
The motor requires standard AC input (unless an alternate voltage has been
specified).
There are several kinds of switch controls available. Follow the installation
procedure for the type of switch control you will install.
General suggestions for wiring:
‹ Soldering is recommended.
‹ The use of wire nuts is acceptable.
‹ On models not provided with armored whip, a romex connector
should be installed in the appropriate electrical KO (Knock Out).
Preparation—Removing access panel
All connections are made to the electrical box on the side of the unit
(audience left). An access panel covers the electrical connections. To
remove the access panel on the underside of the unit, remove the two hex
screws. Refer to Figure 4. Replace the access panel after the electrical
connections have been made.
Masking Panel
Screen
Access Panel
Hex Screws
Figure 4: ABT-EM Electriscreen-underside view
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Stewart Filmscreen Corporation
Installing the low-voltage 3-button switches (horizontal)
There are three low-voltage controls mounted on a board. Each low-voltage
control allows the use of low-voltage wire to connect to the supplied 3-
position 24V momentary wall switch. The top low-voltage box controls the
mask, the middle box controls the screen, and the bottom box, nearest the
J-boxes, controls the door. Refer to Figure 5.
Note: The board can be mounted near the screen, or by adding extra
cable, you can mount it farther away.
Preparing the connection
Before making the electrical connections, you need:
‹ An available AC constant power source
‹ A 4-conductor switch hook-up cable (4-conductor bell wire or
category 5 cable is typically used for long runs)
‹ Cat 5, multi-conductor unshielded, or similar type electronic cable
can be used to connect the 3-button switch to the LVC. The
recommended wire gauge is 20 to 24 AWG. Use plenum-rated
cable when required.
Making the connection
Figure 6, on the following page, illustrates the connections.
Note: The electrical housing has a 2-gang J-box. For a top view, refer to
Figure 4.
1. Connect the 8-conductor cable to the connection harness coming
from the J-box labeled “switch input” on the screen unit.
Note: Use a longer cable to mount the low-voltage control board
further from the screen unit.
2. Connect the 4-conductor cable to the connection harness coming
from the low-voltage control board.
Caution
Refer to the First Time
Activation note in the
section “Operating the
Screen.”
3. Connect the hookup cable to the 3-button switch.
4. Connect the main AC power source to the the low-voltage board.
5. Connect the main AC power source to the the J-box labeled
“main AC power connection” on the screen unit.
6. A parallel connection to an outboard audio-visual switching
network can be made at this time. (optional)
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
7
Note: The cable wires can be split with extra length
added so that you can move the control units to a
location at a distance from the screen case.
8 Conductor Hook-up Cable - 18ga Minimum Category 5
recommended (NOT Supplied)
4 Conductor Hook-up Cable—20-24ga Recommended
Category 5 Typically Used (NOT Supplied)
STOP-Yellow
COMMON-White
UP-Red
DOWN-Black
Mask
Screen
Door
NEUTRAL-White
STOP-Yellow
COMMON-White
UP-Red
HOT-Black
GREEN-Ground
DOWN-Black
NEUTRAL-White
3-button Momentary
Switches
HOT-Black
GREEN-Ground
Figure 5: Low voltage 3-button switch wiring
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Stewart Filmscreen Corporation
Connecting the dual screen trigger interface option
(vertical masking)
Note: The dual screen trigger interface option is not available for the
horizontal masking system.
The optional 12V screen trigger interface enables up and down operation of
the screen and mask in conjunction with a projector, tuner, VCR, cable box,
or switched AC outlet.
Caution
Refer to the First Time
Activation note in the
section “Operating the
Screen.”
Once the AC power outlet is installed near the screen, an electrician is not
needed to connect the screen trigger interface to the power source.
Note: An optional 12V DC transformer is used if there is no 12V power
source from the projector or AV control center.
Preparing the connection
Before making the electrical connections, you need:
‹ An available AC constant power source installed near the screen
Making the connection
Figure 6 illustrates the connections.
1. Attach each 12V trigger wire to the jack on the box.
2. Connect the main AC power source to the the J-box labeled
“main AC power connection.”
Note: The two toggle switches on the electrical connection housing are
used by the factory only. Do not adjust.
Screen
To Projector
or
AC Power Supply
Optional 12V DC
Transformer with Switch
Mask
To Projector
or
AC Power Supply
NEUTRAL-White
Optional 12V DC
Transformer with Switch
HOT-Black
GREEN-Ground
Figure 6: Dual screen trigger interface connection
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
9
Connecting the screen trigger interface and low-voltage
option (vertical masking)
The optional 12V screen trigger interface enables up and down operation of
the door and screen in conjunction with a projector, tuner, VCR, cable box,
or switched AC outlet. The low-voltage control switch controls the vertical
masking panels.
An optional infrared sensor can be installed with the low-voltage control box.
This allows an infrared remote control to adjust the vertical masking panels.
Note: An optional 12V DC transformer is used if there is no 12V power
source from the projector or AV control center.
Preparing the connection
Before making the electrical connections, you need:
‹ An available AC constant power source installed near the screen
‹ A 4-conductor switch hook-up cable (4-conductor bell wire or
category 5 cable is typically used for long runs)
‹ Cat 5, multi-conductor unshielded, or similar type electronic cable
can be used to connect the 3-button switch to the LVC. The
recommended wire gauge is 20 to 24 AWG. Use plenum-rated
cable when required.
Making the connection
Figure 7 illustrates the connections.
1. Attach the 12V trigger wire to the jack on the box.
2. Connect the main AC power source to the the J-box labeled
“main AC power connection.”
3. Connect the 4-conductor cable to the connection harness coming
from the J-box labeled “switch input.”
4. Connect the hookup cable to the 3-button switch.
Caution
Refer to the First Time Activation note in the section
“Operating the Screen.”
Note: The two toggle switches on the electrical connection housing are
used by the factory only. Do not adjust.
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Stewart Filmscreen Corporation
Door and Main Screen Operation
To Projector or AC Power Supply
Optional 12V DC
Transformer with Switch
STOP-Yellow
COMMON-White
UP-Red
DOWN-Black
3-button
Momentary Switch
4 Conductor Hook-up Cable—
20-24ga Recommended
Category 5 Typically Used (NOT
Supplied)
NEUTRAL-White
HOT-Black
Masking control
GREEN-Ground
Figure 7: Screen trigger interface and low-voltage connections
for vertical masking unit
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
11
Connecting the high-voltage switch control (vertical
masking)
A standard 3-position AC wall switch is supplied. The high-voltage control is
connected to the electrical source. It alternates directions of mask motion by
means of the hot lead, using the 3-position switch.
Preparing the connection
Before making the electrical connections, you need:
‹ An available AC constant power source
‹ A 4-conductor romex or motor connector cable
Making the connections
Figure 8 illustrates the connections.
1. Connect the wall switches to the AC constant power source.
2. Connect the wall switches to the unit’s electrical box.
Door & Screen Switch
DOWN-Black
UP-Red
Line (Hot)
AC Power
Source
COMMON-White Neutral
GROUND-Green
DOWN-Black
UP-Red
Line (Hot)
AC Power
Source
COMMON-White Neutral
Mask Switch
GROUND-Green
Figure 8: High voltage control wiring diagram
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Stewart Filmscreen Corporation
OPERATING THE SCREEN
First time operation
The first time you operate the screen, the protective paper
will fall out as the screen unrolls. Once the screen is fully
displayed, make sure that no packing paper remains on the
screen roll. The screen can be damaged if loose paper
remains.
First time activation for screen trigger interface
The STI input must be supplied with 12V DC power before
the main AC power is activated. Due to factory screen
packing procedures, the main screen roller may not be in
the fully up (motor off) position.
First time activation for horizontal screen
You must remove the shipping lockdown brackets. To do
this, operate the screen so that the door opens, then stop
the operation. Unscrew and remove the shipping lockdown
brackets.
The method you use to raise and lower the screen and mask depends on
the type of switch control device you have selected.
Caution
Do not operate the
motors when any of the
following occurs:
Use the masking screen as needed to establish the appropriate viewing
format.
When you lower or retract the screen or mask, they will stop at their preset
limits. If an obstacle (such as a person or furniture) gets in the path of the
screen as it is lowered, you should use the switch control to stop the
screen's motion; it will not automatically stop if it hits an obstacle.
‹ The unit emits any
smoke, heat,
abnormal noise or
unusual odor.
The motor is designed to be used for short operations such as lowering the
screen (or mask) in preparation for viewing. The motor is not designed for
continuous duty. If the motor operates continually for more than a few
minutes, it may automatically shut off to prevent damage from overheating.
If the motor occasionally needs to be run more than normal, for example
during initial setup and positioning, allow time for the motor to cool down.
‹ The unit is
damaged in some
way, such as
damage from a
water leak.
If any of these
situations occur, call a
qualified service
person.
In general, when the screen is not in use, you should store it in the fully
retracted position.
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
13
ADJUSTING THE SCREEN EXTENSION
Caution
Improper adjustment of the limit switches can cause
irreparable damage to the screen itself, resulting in voiding
the factory warranty.
Each roller tube has a set of limit switches. The extension and retraction
limit switches have been preset at the factory. In general, we advise you to
avoid readjusting these switches.
In some cases, to enable proper alignment of the displayed image on the
screen, you may need to adjust the extension of the screen or the mask. If
adjustment to the extension is necessary, carefully follow these instructions.
Warning!
The screen and mask are fully retracted when the battens
are flush with the bottom of the case. Do not attempt
adjustments with the yellow retraction (UP) limit switch that
will further retract the screen. Incorrect adjustment of the
switch will cause severe screen damage. Please consult the
factory if you have any questions.
Trap Door
Screen
Screen Limit
Switches
Mask Limit
Switches
Figure 9: Underside view
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Stewart Filmscreen Corporation
Modifying the extension of the screen and the mask
You can increase the extension of the screen and mask up to 3" / 7.6 cm
past the factory preset stop, or you can decrease the extension by
approximately
4-6" (10 - 15 cm) from the factory preset stop. Do not attempt to modify the
screen extension beyond these recommended amounts.
The limit switches are located on the left side of the screen roller tube inside
the case, as shown in Figure 9.
To increase the screen's fully extended (screen down) stop position:
1. Lower the screen or mask to its current stop position.
2. Locate the white extension (down) limit switch located on the left
side of the screen tube. Use a screwdriver to turn the switch in a
counterclockwise direction. If the power is on, the screen will
drop incrementally as the switch is turned.
Note: One complete turn of the switch will make approximately a
3/4" (2 cm) change in the screen or mask’s stop position.
To decrease the screen extension:
1. Lower the screen or mask until it is extended about halfway
down.
2. Locate the white extension (down) limit switch located on the left
side of the screen tube. Use a screwdriver to turn the switch in a
clockwise direction.
Note: One complete turn of the switch will make approximately a
3/4" (2 cm) change in the screen or mask's stop position.
3. Activate the screen in the down direction until it reaches the
newly reduced stop position. Repeat this procedure until the
desired stop position is reached.
Once you have made the adjustment, whenever you lower the screen or
mask, it will automatically stop at the new position.
Note: It is recommended that you make a note of any changes made to the
factory preset.
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
15
SCREEN CARE AND CLEANING
With reasonable care, you may expect many years of trouble-free use of
your Stewart projection screen.
We encourage you to keep your screen clean. To protect your screen when
it is not in use, store it in the fully retracted position.
Avoid getting any foreign material on the screen, as cleaning may prove
very difficult. It may not be possible to remove scratches, paint, ink, etc.
General maintenance
The screen surface on your screen is delicate. Special attention to these
instructions should be followed when cleaning.
‹ A draftsman-style brush may be used to lightly whisk away any
loose dirt or dust particles. (This type of brush is usually available
at office supply stores.) Stewart Filmscreen has an optional
screen cleaning kit that contains the proper type of brush.
Contact your dealer if you would like to obtain this cleaning kit.
‹ Particles left on the screen when it is retracted into the case may
form an impression on the screen surface. Periodically wipe the
back of the screen with a clean damp cloth.
‹ For tougher spots, use a solution of mild detergent and water.
Rub lightly using a sponge. Blot with a damp sponge to absorb
excess water. Residual water marks will evaporate within a few
minutes. Let the screen air dry completely before retracting.
Do not use any other cleaning materials on the screen. Contact the factory
if you have questions about removing difficult spots.
Replacement parts and service
No user-serviceable parts are contained within the unit. Contact your dealer
or the factory if you require part replacement or service.
PRODUCT WARRANTY
This warranty covers defects in materials and workmanship for a period of
one (1) year from the date of installation, not to exceed fifteen (15) months
from the date of shipment, provided this product is installed in a normal
environment and maintained according to written instructions in the product
Owner’s Manual. Stewart Filmscreen warrants against loss of usefulness,
discoloration or deterioration of optical quality within the warranty period as
a result of manufacturing or material defects.
A factory authorized returned screen arriving prepaid to our facility for
inspection and proved defective due to an inherent manufacturing fault will
be repaired or replaced by Stewart Filmscreen Corp. This warranty
expressly does not cover any costs of removal, installation, framing, or other
incidental costs to replacing the screen or returning it to the manufacturer.
Should you encounter a perceived product fault or problem, contact your
dealer regarding application of this warranty.
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Stewart Filmscreen Corporation
TROUBLESHOOTING
Refer to the following guidelines if you encounter a difficulty in the operation
of your Stewart Filmscreen. Problems related to electrical or motor function
may require a qualified service person or electrician.
Should you have a problem that is not addressed here, call the Stewart
Filmscreen Corporation.
Problem description
Probable cause
Action to take
Door won't open.
No AC power available.
Check to see if the circuit breaker has switched off.
Reset if needed.
Screen won't operate.
Outboard switching problem.
Check outboard switching apparatus.
Check voltage availability. Contact an electrician.
Check that the toggle switches are in the correct
position. See Figure 3, p. 5.
Screen or mask won't roll up Bad connection at switch.
or down (even though power
Polarity of STI line may be bad.
is available).
Have an electrician or qualified service person check
the connection as follows:
· If you have a low voltage control unit, check switch-
line connections.
· If you have a high voltage control switch, check
switch-line connections.
· If you have a screen trigger interface, check line
connections, or the mini-plugs at the screen input or
projector output. Check 12V DC line for correct
polarity. Contacts may be sticking—tap relay to free
contacts.
Roller tube motors chatter
when power is activated.
Can be caused by voltage drop,
bad connections, or a defective
switch.
Have an electrician or qualified service person check
all hook-ups including all outboard wiring.
Unit hums in up mode.
(Screen or mask has already
retracted.)
The screen batten is retracting too
far into the case. Failure to
correct can damage motor and
screen. Do not use the unit until
this problem is resolved.
Have a qualified service person adjust the yellow UP
limit switch. Turn the adjusting screw clockwise.
Screen or mask drops when
up direction is activated
(grinding noise occurs).
Drop in voltage.
Motors require full voltage. Have an electrician or
qualified service person check available voltage.
Screen or mask continues
past bottom stop position.
White limit switch is out of
adjustment.
Readjust the white DOWN limit switch. See pp. 14-15
of this manual.
Battens retract too far into
case.
Yellow limit switch out of
Have a qualified service person readjust the yellow
UP limit switch. See pp. 14-15 of this manual.
adjustment. Failure to correct
can damage motor and screen.
Do not use the unit until this
problem is resolved.
Motor shuts off. Motor has
been in use for more than
2 minutes.
Motor is designed for short
operations (lowering and
retracting), not continuous duty.
Longer operation, such as during
setup and positioning, causes the
motor to overheat and shut off.
Allow the motor to cool down. Complete cooling can
take an hour or more. Heat gain is cumulative and
takes time to dissipate. If motor use is initiated before
it has cooled completely, the motor will shut down
again when it reaches maximum temperature.
Any controller (e.g., STI,
LVC, etc.) fails to operate
motor.
Dirt, finger prints, marks, etc. Improper handling of screen.
on screen surface.
Brush off or use a mild detergent solution with clean
rag or cotton swab.
Indentations appear on
screen surface.
Debris or particles adhering to
screen due to static cling.
Check back of screen; gently brush debris away by
hand.
ABT-EM Trapdoor ElectriMask Electriscreen: Owner’s Manual
17
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