Da-Lite Dual Format Imager - Manual (Page 10)

10
Symptom Cause Solution
Masking System will not
operate. Motor does not hum.
Incorrect line voltage.
Verify 115-125V (or 220-240V). If insufficient voltage, rewire
incoming electric line.
Blown fuse. Replace fuse.
Tripped circuit breaker. Reset circuit breaker.
No power to operating switch
or junction.
Check above. Tighten all loose wire connections. Correct any
improper connections.
Down Position
Check for power across black and white leads.
Up Position
Check for power across red and white leads.
Screen will not operate
and motor does not hum.
Power at junction box.
Thermal overload tripped. Let motor cool down for 15 minutes. Try again.
Broken wire in the “down” or “up” position. Check for continuity. Cut off old splice and reconnect.
Defective motor, limit switch or capacitor. Replace motor assembly. NOTE: Motor is a sealed assembly.
Capacitor burned out. Replace motor assembly.
Masking System does not stop
at correct position.
Limit switch is out of adjustment. See Mask Travel Adjustment section on page 9.
Noise.
NOTE: Masking System will
operate with a low-pitched
hum.
Squeaking, rubber end plug rubbing on motor. Center roller in case.
Grinding. Foreign object in screen rubbing on roller
or fabric.
Remove.
Gear noise. Replace motor assembly.
Coasting. Defective brake. Replace motor assembly.
Mask hangs crooked.
Masking System not installed properly. Check for level and plumb.
Mask has backed up inside case.
Adjust "down" limit switch slowly until roller is exposed and
wrinkle comes out, then readjust for proper drop.
Mask is damaged. Replace mask.
Troubleshooting