Refer to the following guidelines if you encounter a dif
f
iculty 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 S
t
ewart
Filmscreen Corporation.
Model A Electriscreen: Owner’s Manual
15
T
ROUBLESHOOTING
Problem description
Probable cause
Action to take
Screen won't operate.
No AC power available.
Outboard switching problem.
Check to see if the circuit breaker
has switched off. Reset if needed.
Check outboard switching
apparatus.
Check voltage availability. Contact
an electrician.
Screen won't roll up or down
(even though power is available).
Bad connection at switch.
Polarity of STI line may be bad.
Have an electrician or qualified
service person check the
connection as follows:
•
If you have a
high voltage control
switch, check switch-line
connections.
•
If you have a
low voltage control
unit, 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.
Screen roller chatters when
power is activated.
Can be caused by voltage drop,
bad connections, or a defective
switch.
Have an electrician or qualified
service person ch eck all hook-ups
including all outboard wiring.
Unit hums in up mode. (Screen
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 drops when up direction
is activated (grinding noise
occurs).
Drop in voltage.
Screen motor requires full voltage.
Have an electrician or qualified
service person check available
voltage.
