12
Stewart Filmscreen Corporation
A
DJUSTING THE
S
CREEN
E
XTENSION
Caution
Improper adjustment of the limit switches can cause
irreparable damage to the screen itself, resulting in voiding
the factory warranty.
Figure 12:
Underside view of
Electriscreen
Access to
Limit Switches
Screen
Trap Door
Internal Electrical Box
Electrical Access Plate
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. If adjustment to
the extension is necessary, carefully follow these instructions.
Modifying the extension of the screen
You can increase the extension of the screen 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 12.
To adjust the screen's fully extended (screen down) stop position:
1. Lower the screen to its current fully extended position.
2. Locate the white extension (DOWN) limit switch located on the left
side of the screen tube. Use a screw driver to turn the switch in the
appropriate direction:
– To
decrease
the screen extension, turn the switch clockwise.
– To
increase
the extension, turn the switch counterclockwise.
Note
: One complete turn of the switch will make approximately a 1/2" /
1.3 cm change in the screen height.
3. Raise the screen, and then lower it again. It should stop at the new
position.
Once you have made the adjustment, whenever you lower the screen, 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.
Warning!
The screen is fully retracted when the trapdoor closes. Do not
attempt adjustments with the yellow retraction (UP) limit
switch that will further retract the screen into the case.
Incorrect adjustment of the switch will cause severe screen
damage. Please consult the factory if you have any questions.
