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4. Lift the reflector out of the fixture.
5. See Figure 5. Lens arrays are retained by magnetic
mountings. To remove a lens array, press on one
side until you can grip the other side. Lift the lens
array off the magnets and store for possible future
use. To install a lens array, place it into position on its
magnetic mounting posts and check that it is held
securely.
6. Reinstall components in reverse order of
disassembly before reconnecting the fixture to
power.
Installing and removing the opal front cover
The opal diffuser front cover supplied with the fixture makes the individual LEDs invisible, giving a surface
with smooth color and a very wide beam angle. Before installing it, remove any lens arrays that are installed,
or hot-spots will be visible on the opal front cover surface.
To install an opal front cover:
1. Isolate the fixture from power. If the fixture has been in use, allow it to cool for at least 10 minutes.
2. See Figure 4. Loosen the two captive screws (arrowed) on the end cap and swing the end cap open.
3. A clear front cover is installed at the factory. Slide it out of its slots in the front of the fixture and store it for
possible re-use in future.
4. If lens arrays are installed, lift the reflector out of the fixture, remove the lens arrays as described under
"Removing and installing LED lens arrays" on page 17 and reinstall the reflector.
5. Slide the opal front cover into the slots in the front of the fixture.
6. Close and fasten the end cap before reapplying power.
To remove an opal front cover:
1. Isolate the fixture from power. If the fixture has been in use, allow it to cool for at least 10 minutes.
2. See Figure 4. Loosen the two captive screws (arrowed) on the end cap and swing the end cap open.
3. Slide the opal front cover out of its slots in the front of the fixture and store it for possible re-use in future.
4. If you want to obtain a narrower beam angle when the opal front cover is not installed, install lens arrays
as described under "Removing and installing LED lens arrays" on page 17.
5. Slide the clear front cover into the slots in the front of the fixture.
6. Close and fasten the end cap before reapplying power.
Installing diffuser filters
Diffuser filters ensure uniform color mixing and widen the beam angle. They are designed to be used with
lens arrays and the clear front cover installed. A narrow-angle diffuser filter is supplied with the fixture. Sets
containing 4 narrow-angle or 4 medium-angle diffuser filters are available from Martin as accessories for the
Stagebar 2. Narrow diffusers are marked with one notch (or in early models, no notch) at one end, and
medium diffusers are marked with two notches at one end.
To install a diffuser filter:
1. Isolate the fixture from power. If the fixture has been in use, allow it to cool for at least 10 minutes.
2. See Figure 4. Loosen the two captive screws (arrowed) on the end cap and swing the end cap open.
3. A clear front cover is installed at the factory. Slide it out of its slots in the front of the fixture.
4. Hold the diffuser filter against the inner side of the front cover so that the diffuser's shiny side will face
out of the fixture and its matt side will face in towards the LEDs, then slide the front cover and diffuser
together into the slots in the front of the fixture, taking care not to damage the diffuser.
5. Close and fasten the end cap before reapplying power.
18
Stagebar 2 user manual
Figure 5: Removing a lens array
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