13. Aligning the lamp
Aligning the lamp in the optical system is achieved via the three adjusters at the rear
in the optical system
of the projector.
This procedure should be undertaken to properly align the lamp in the optical system
and to avoid the possible overheating of internal components due to the incorrect
focusing of the beam onto components not intended to be exposed to this.
Alignment procedure
Alignment is effected via the three adjusters,
A
,
B
and
C
operating in conjunction
with each other; the lamp should be on, black-out and dimmer fully open, and no
colour filters inserted.
If the lamp is not correctly aligned, a hot-spot will be noticeable; this is a function of
the lamp’s positioning; use the three adjusters to bring the hot-spot to the centre of
the beam (adjusters
B
and
C
) and then flatten the beam to maximum uniformity
(adjuster
A
).
Vertical adjustment
Adjuster (
B
) acts on a lever and spring assembly to position the lamp via a vertical
movement within the reflector; rotate it until correct positioning is achieved.
Horizontal adjustment
Adjuster (
C
) acts on a level and spring assembly to position the lamp via a horizontal
movement within the reflector; rotate it until correct positioning is achieved.
Axial adjustment
Adjuster (
A
) acts on the entire lamp base support; rotate it until correct positioning is
achieved.
