General
 If this equipment is properly maintained it should rarely give trouble in operation.
All the information given in this division has been carefully prepared on the basis of operating
experience gained with large numbers of theatres, and you should make yourself familiar with it
so that you can quickly locate and remedy troubles, and continue a program with the minimum of
interruption if trouble arises during a show.
Remember that whenever the sound is not coming over as it should, the fader can be employed to
cut it out until the trouble has been located and remedied. It is much better to do this than to
continue the sound accompaniment when it is obviously bad. If the fader is properly handled all
kinds of trouble may happen and be remedied by the projectionist without the audience noticing
anything seriously amiss.
Whenever trouble occurs, use the emergency equipment or emergency set-up if one is provided, and
endeavor to locate and remedy the difficulty, if possible, by following the instructions given here.
If you are unable to do so, notify our nearest representative by telephone, telegraph, or
registered mail. Do not attempt extensive repair or replacement work on the equipment, as this
usually requires expert knowledge and we maintain service engineers who are quickly available for
this purpose.
The installation has fuses at the following points:
Motor Control Box -
Two-10 amp. plug fuses on AC
Two-15 amp. plug fuses on DC
Battery Panels - See Illustrations.
Box for Film Dry Batteries -
1 amp. midget fuses.
Horn Cutout Box (Backstage) -
3 amp. plug fuses.
46-A or 46-B Amplifier (if used)
Two-3 amp. plug fuses.
KS-5321 Motor Generator (used on DC only)
Generator-Two-10 ampere cartridge fuses.
Motor (115 V.)-Two-20 ampere cartridge fuses.
Motor (230 V.)-Two-10 ampere cartridge fuses.
Voltmeter-Two 1/2 amp. midget type fuses.
Battery Charger (used on AC only)
Three-5 amp. plug fuses.
When one of the fuses burns out, replace it by a new fuse of the same type, as covered in the instructions
which follow, but if it blows a second time, do not renew it until the cause of the
trouble has been found and remedied.
Before removing the rear cover of any piece of amplifier equipment, be sure to turn off the power
and keep it off till the cover is replaced. Also switch off the power on the battery switching
and charging panel before replacing any fuses.
If all conditions appear normal, and still no sound is heard from the horns, and no relief is
afforded by any of the procedures that will be described, the indications are that a break or
short circuit exists somewhere in the sound circuit. In this case listen in with the headset
along this circuit, starting at the disc or film pick-up with a record playing, and working
|
