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Cleaning the fixture
To clean the head:
1. Power the lamp off, allow components to cool for 2 hours 45 minutes and
disconnect the fixture from power.
2. Remove both head covers by loosening their quarter-turn retaining
screws (see Figure 20).
3. Vacuum or gently blow away dust and loose particles inside the head
with compressed air.
4. Carefully clean the optical components, but note that special precautions
apply to the gobos (see "Aerial effects in the MAC III AirFX" on page 39).
Remove smoke and other residues with cotton swabs or unscented
tissues moistened with isopropyl alcohol. A commercial glass cleaner
may be used, but residues must be removed with distilled water. Clean
with a slow circular motion from center to edge. Dry with a clean, soft
and lint-free cloth or compressed air. Remove stuck particles with an
unscented tissue or cotton swab moistened with glass cleaner or distilled
water. Do not rub the surface: lift the particles off with a soft repeated
press.
5. Remove dust from fans and air vents with a soft brush, cotton swab,
vacuum, or compressed air.
6. Reinstall the head covers.
Lubrication
The MAC III AirFX does not require lubrication under normal circumstances. The slides for the zoom and
focus lens cars are lubricated with a long-lasting teflon-based grease that can be reapplied by a Martin
service partner if necessary.
Replacing a color filter
Note: Wear cotton gloves while handling color filters and use only genuine Martin filters.
1. Power the lamp off and allow the fixture to cool for 2 hours 45 minutes. Disconnect the fixture from
power.
2. The top of the head is above the text on the lamp cover. Lock the head in a convenient position for
access to the top of the head.
3. Remove the two retaining screws (see Figure 20) from the top cover and lift it away from the head. Let
the cover hang on its safety wire or unclip the safety wire and remove the cover completely.
4. Rotate the color wheel until the filter you want to change is accessible. Lift the outer edge of the filter
away from the color wheel slightly to release it, then pull it free of its retention spring and out of the color
wheel.
5. To insert a filter, slide it into the color wheel so that it clips under its retention spring and make sure that
the filter's outer edge engages in the lip on the edge of the color wheel.
6. If no further service work is to be carried out, reinstall the top cover with its safety wire and release the
tilt lock.
Aerial effects in the MAC III AirFX
The MAC III AirFX uses specially-designed borosilicate 3.3 aerial effect gobos with a heavy matted
aluminum coating that require particularly careful handling and storage.
The use of metal gobos in the MAC III AirFX is not recommended.
Do not use gobos with dark coatings on any side, as these will absorb heat – either directly from the lamp or
reflected back from other optical components – and will not be durable.
Handling and storage
1. Store all gobos in a dust-free environment with approx. 50% humidity.
2. Always use clean gloves when handling gobos.
3. Avoid touching the other gobos when taking out a gobo from the rack: the sharp edge of one gobo can
scratch the others.
Service and maintenance
Figure 20: Head cover
screws
39
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