Da-Lite Multi Format Imager Buku Instruksi - Halaman 10

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Troubleshooting

Symptom

Masking System will not

operate. Motor does not hum.

Screen will not operate

and motor does not hum.

Power at junction box.

Masking System does not stop

at correct position.

Noise.

NOTE: Masking System will

operate with a low-pitched

hum.

Coasting.

Mask hangs crooked.

Cause

Incorrect line voltage.

Blown fuse.

Tripped circuit breaker.

No power to operating switch

or junction.

Thermal overload tripped.

Broken wire in the "down" or "up" position.

Defective motor, limit switch or capacitor.

Capacitor burned out.

Limit switch is out of adjustment.

Squeaking, rubber end plug rubbing on motor.

Grinding. Foreign object in screen rubbing on roller

or fabric.

Gear noise.

Defective brake.

Masking System not installed properly.

Mask has backed up inside case.

Mask is damaged.

Solution

Verify 115-125V (or 220-240V). If insufficient voltage, rewire

incoming electric line.

Replace fuse.

Reset circuit breaker.

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.

Let motor cool down for 15 minutes. Try again.

Check for continuity. Cut off old splice and reconnect.

Replace motor assembly. NOTE: Motor is a sealed assembly.

Replace motor assembly.

See Mask Travel Adjustment section on page 9.

Center roller in case.

Remove.

Replace motor assembly.

Check for level and plumb.

Adjust "down" limit switch slowly until roller is exposed and

wrinkle comes out, then readjust for proper drop.

Replace mask.