We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
MAINTENANCE AND INSPECTION 159
do so may upset the magnetic characteristics of the coils. On some amplifiers, two or more tubes are operated with filaments in series; if one tube burns out the others will then be extinguished. If two or more tubes go dark at once, therefore, only one may actually be burned out. The dead tube may be located by replacing inspection.
I. DIFFICULTIES DURING TESTING
A. The Charger Fails to Function (A. C. Supply Only) If a rectifier bulb does not light, its filament may be burned out, or a fuse on the battery panel may have blown out. Clean the tube socket. If the tube still does not light, replace it with one of the spares supplied. If the tubes light but the charger does not give any output, a fuse inside the latter may have been blown out.
B. The Motor Does Not Start
1. Is the line switch on?
2. The fuse in the motor control box may have blown out.
C. The Reading on the Motor Control Box Is Not Within Specified Limits If the reading is too high on A. C, or too low on D. C, it indicates excessive friction at some point in trye mechanism. If this is not attended to immediately a bearing may freeze and render a projector temporarily useless. As soon as an abnormal reading is noted on the meter stop the machine and oil all bearings, particularly any bearing that seems unduly hot. If the trouble persists notify the service man at once.
D. The Motor Does Not Maintain a Regulated Speed Notify the service engineer at once.
E. There Is an Unsteady Pitch in Reproducing ("Flutter") With film reproduction there may be dirt on the sprocket in the film compartment of the attachment. If this cause does not exist notify the service engineer at once.