Stewart Filmscreen Corp Projection Television LCD Front Projector User Manual

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”  
2
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.  
4
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  
6
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  
8
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.  
10  
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  
12  
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  
14  
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.  
16  
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  
 
1-800-762-4999 Fax (310) 326-6870  
 

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