Martin MAC TW1 User Manual page 11

4. Grasp the ceramic lamp base, twist it 45° counterclockwise and withdraw the lamp from the fixture as
shown in Figure 2.
5. Check that the replacement lamp is correctly rated for the voltage of the dimming system output (see
"Dimming options and lamp voltage" on page 12 for full details).
6. The lamp base has two metal contacts, one narrow and one wide, that fit into corresponding narrow and
wide slots in the lampholder. Line up the contacts on the replacement lamp's base with the
corresponding slots in the lampholder, slide the lamp into the fixture so that the contacts are fully
engaged in the slots, and then twist the lamp base 45° clockwise until it locks into position with a
noticeable click.
7. Close the lamp access cover and tighten the screw to secure the cover before reapplying power.
8. After installing a new lamp, reset the lamp hour counter (see "Time" on page 18). We recommend that
you label the fixture with the voltage rating of the installed lamp.
L A M P A D J U S T M E N T
Warning! Adjust the lamp with the fixture cool. The fixture may become hot during
adjustment, so wear heat-resistant safety gloves.
As well as being undesirable for aesthetic reasons, 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, allow it to cool for at least 45 minutes to avoid the danger of burns, and
wear heat-resistant safety gloves.
2. Apply power, allow the fixture to
reset, then set zoom to narrow
(DMX value 255 on channel 7 in
basic or 12 in extended mode),
turn on the lamp and open the
mechanical shutter.
3. Aim the fixture at an even surface
and make sure no further
commands can be sent by DMX.
4. Release the screw on the lamp
access cover and open the cover.
5. See Figure 3. Screw the three 3
mm Allen screws (arrowed) in or
out to obtain the most even
beam.
6. Close and secure the lamp
access cover.
Figure 3: Lamp adjustment screws
Lamp
3mm 3mm
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