Basic Service; Replacing The Lamp; Optimizing Reflector Alignment; Rotating Gobos - Martin MAC 250+ User Manual

s e c t i o n 5
B A S I C S E R V I C E
The MAC 250 and MAC 250
Excessive dust, grease, and smoke fluid buildup degrades performance and causes overheating and damage that is not
covered by the warranty. The MAC 250 and MAC 250
The schedule will depend on the application and should be discussed with your Martin distributor. Refer any service
that you are not qualified to perform to a professional technician.
Removing covers exposes dangerous live electrical circuits, hot surfaces, and a
lamp under high pressure. Procedures requiring the removal of any cover shall
be performed by professional users or technicians only. Disconnect the fixture
R e p l a c i n g t h e l a m p
If the lamp becomes difficult to strike, it probably needs to be replaced. To reduce the
risk of lamp explosion, which may damage the fixture, do not exceed the lamp's rated
life (2000 hours) by more than 25 percent.
Refer to page 5 for the lamp replacement procedure. After installing the lamp, reset the
lamp usage counters as described on page 10.
O p t i m i z i n g r e f l e c t o r a l i g n m e n t
The reflector is aligned at the factory. Due to differences between lamps, however, fine
adjustment may improve performance.
1. Strike the lamp and focus the light on a flat surface.
2. See Figure 1 on page 4. Center the hot-spot (the brightest part of the
beam) by turning the 3 adjustment screws one at a time with a 3 mm Allen
wrench. If there is no hot-spot, adjust the reflector until the light is even.
3. To reduce a hot-spot, "push" the reflector out by turning all 3 screws coun-
terclockwise 1/4-turn at a time until the light is evenly distributed.
4. If the light is brighter around the edge than it is in the center, or if light out-
put is low, the lamp is too far back in the reflector. "Pull" the reflector in by
turning the screws clockwise 1/4-turn at a time until the light is bright and
evenly distributed.
R o t a t i n g g o b o s
Custom glass gobos for the MAC 250 and MAC 250
non-reversible graphics true on the coated side. Complete gobo specifications are
listed on page 27. Do not use chrome-coated glass gobos: they absorb more heat
than enhanced aluminum gobos and are likely to break or oxidize.
C h a n g i n g g o b o s
1. Disconnect the fixture from AC power and allow it to cool. Remove the top
head shell as shown in Figure 5.
2. Turn the gobo wheel until the gobo lines up with the access hole.
Squeeze the ends of the retention spring together and remove. Push
the gobo out from the back.
3. Insert the new gobo. See Figure 7 for proper orientation.
4. Replace the gobo retention spring.
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operate under challenging conditions presented by heat, humidity, dust, and touring.
from AC power and allow it to cool before removing any cover.
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require regular maintenance to keep performing at their peak.
W A R N I N G !
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should be made with any

Basic Service

Figure 5
Figure 6
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