Model 335 Supplement 6
2.0 External Arc Lamp Power Supply NOTE: This section applies only to those Model 335 projectors
that use the external power supply. Projectors with serial numbers
351100 or higher do not require the external power supply. Refer
to the Series 300 Service Manual for these units.
CAUTION!!!
The external power supply can be placed on its side in the upright
position or laid flat on its back surface. Working with this power
supply in the upright position is a personal safety hazard. The
power supply can tip over and cause physical injury to anyone
nearby. For this reason, the power supply should always be on
its FLAT SURFACE, not on its side!
The External Arc Lamp Power Supply provides the additional
power necessary to operate the larger 2500 watt Xenon Arc Lamp
that is used in the Model 335 Projector. The External Arc Lamp
Power Supply and all required cables are shipped with the Model
335 Projector. The external power supply operates from a 200-
240 VAC, 30 amp, 50/60 Hz source and can be used with a single
or three phase power source.
Power is applied to the unit by a circuit breaker located on one
side next to a 16 amp, 600 volt fuse that protects the power
supply. Another circuit breaker (on another side of the power
supply) applies power to the Xenon Arc Lamp in the projector.
Two access openings (covered by plastic caps about an inch in
diameter) are located on the top of the power supply near the
nameplate. The cap furthest from the nameplate can be removed
to access the Current Adjust Pot, whenever it is necessary to
increase the Xenon Lamp current (see the procedure shown
below under “Brightness Level Checks”). The other access
opening is not used.
The smaller power cord, that plugs into the side of the External
Arc Lamp Power Supply, supplies all the voltages for the projector
electronics. The larger cable, that plugs into the connector at the
rear of the projector, provides the power for the 2500 watt Xenon
Arc Lamp.
The installation and operation of the External Arc Lamp Power
Supply consists only of connecting the two power cables to the
power source and the projector and activating both circuit
breakers to the ON position. The red lamp near the large circuit
breaker will light to indicate power on.
Very little maintenance is required on the External Arc Lamp
Power Supply. The ventilation inlet and outlet grills should be
cleaned on a regular basis to insure good air flow. The blower
motors are permanently lubricated.