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Service and maintenance
27
2. Turn the goboholder over so that the recess faces downwards and let the gobo fall out of the holder onto
a clean, soft surface. Turn the goboholder back again and put it on the surface teeth with the recess
facing upwards.
3. Holding the new gobo by its edges, insert it into the goboholder with the alignment marks on gobo and
goboholder correctly lined up. The correct gobo orientation is different for Gobo Wheels 1 and 2. Make
sure that you insert the gobo facing the correct way round by referring to the guidelines on pages 25 and
26.
4. Check that the gobo is seated flat in the holder. See Figure 20. Insert the retaining spring into the
goboholder and press it into its groove in the goboholder. Check that the spring is pressed as flat as
possible against the gobo and that the gobo is held securely in the goboholder.
5. Reinstall the goboholder in the gobo wheel and reinstall the top head cover following the directions given
earlier in this section.
Replacing the prism with a frost filter
The MAC Ultra Performance is supplied with a rotating prism installed. It is possible to replace the prism
with a heavy frost filter, P/N MAR-91614060HU. To remove the prism and install the heavy frost filter:
1. Following the
instructions in
“Opening the head for
access” on page 20,
remove the bottom
head cover.
2. Position the head with
the open lower side of
the head facing
upwards towards you
and apply the tilt lock.
3. See Figure 21. Lift the
prism up towards you
so that you have good
access to it.
4. See Figure 22. Rotate
the prism counter-
clockwise while at the
same time pulling the
prism drive belt over
the lip of its channel in
the prism holder, so
that the belt is
gradually drawn out of
the channel.
Figure 21: Lifting up the prism
Figure 22: Disengaging the prism drive belt
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