6. Close the lamp access cover and tighten the screw to secure the cover before reapplying power.
7. After installing a new lamp, reset the LAMP ON TIME counter in the control menu.
Warning! Adjust the lamp with the fixture cool. The fixture may become hot during adjustment, so
wear heat-resistant safety gloves.
As well as giving uneven projection, a significant hot-spot in the beam will focus extra heat onto optical
components and may cause damage that is not covered by the product warranty.
After fitting a new lamp, adjustment may be required to obtain an even beam.
To adjust the lamp:
1. If the fixture has been in use, shut down the lamp but leave power applied to the fixture. Allow the fixture
to cool for at least 30 minutes. If the fixture is powered off, apply power and allow the fixture to reset.
2. Set zoom to wide so
that it is easier to see
any unevenness in the
projection. Strike the
lamp and open the
3. Aim the fixture at an
even surface and
make sure that no
further commands can
be sent by DMX.
4. See Figure 11. Turn
the three Torx 20 lamp
adjustment screws A,
B and C to obtain the
most even beam.
Figure 10: Lamp removal / refitting
MAC Viper Performance Safety and Installation Guide
Figure 11: Lamp adjustment