Section 4 -- Maintenance 4-5
© 2008, Satake USA Inc.
(ALL RIGHTS RESERVED)
level. The lamp voltage can be monitored to observe the lamp aging (voltage
increases with age), and thus anticipate when it is time for lamp replacement.
However, the lamp current should not be adjusted back down, as this will lower the
light level. In other words, after a lamp has aged, if the voltage is adjusted back
down to 14 volts, this is the equivalent of turning the lamp level down.
The self-regulating ballast should need no adjustment except for checking the initial
“new lamp” setting that has been made at the factory. As the lamps age, the voltage
will increase as described above. When the lamps are replaced with new ones, the
adjustment procedure for new lamps should be repeated to verify that the initial
setting is correct.
IMPORTANT: If it is ever necessary to replace one of the lamp ballasts, it is
necessary to adjust the on-board potentiometer of the new
ballast fully COUNTER-
CLOCKWISE. This potentiometer does not have a stop, so it is difficult to tell when
it is fully COUNTER-CLOCKWISE. Therefore turn the potentiometer at least 15 full
turns COUNTER-CLOCKWISE. This potentiometer is accessible through a small hole
in the ballast case on the same end as the terminal strip.
4.7 CLEANING THE AIR EJECTORS (See Figure 4-1)
After a period of time, dirt, moisture, and oil may collect inside the air ejector and
cause the plunger to stick to the valve seat. This will cause the ejector to operate
erratically or not at all.
In other cases, a piece of foreign material between the plunger and the valve seat
will cause the ejector to blow continuously.
An accumulation of dirt or other particles on the inlet filter screen can restrict the
air flow so that defects can not be diverted properly.
The ejectors should be cleaned on a routine basis to prevent these problems from
developing.
It is recommended that a group of spare ejectors be available. Then one group can
be in the process of being cleaned while another group is being used.
The ejectors can be cleaned as follows:
A. Put on your safety goggles.
B. Turn off power to the machine.
C. Pivot the front half of the viewer outward to gain access to the ejectors.
D. Before removing an air ejector, blow off the surrounding area to prevent dust
or other material from entering the ejector or ejector manifold.
E. Turn off the air supply.
F. Unplug the ejector electrical connector by squeezing the latch releases, and
pulling outward on the connector.
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