Runco Video Xtreme VX-40d Owner's Operating Manual page 69

Section 3: Operation
OPTICAL APERTURE – The optical aperture
inside the projector controls the diameter of the
light beam passing through the system. With a
fully open aperture (slidebar default of "0"), the
maximum amount of light passes through for
maximum brightness in your images. Increase the slidebar setting to reduce the aperture
diameter and maximize contrast ratio instead.
LAMP HISTORY – This read-only option lists the lamps most recently installed and
recorded in the projector. Lamp History automatically updates whenever
you record a new lamp serial number—the new lamp is added to the
bottom of the list.
Use CHANGE LAMP to record the serial number for a newly installed lamp:
In the Lamp S/N window, use the number text entry keys to record the new lamp serial
number and press again to accept the change. See Using Slidebars and Other Controls
if you need help entering the number. Once entered, the new lamp serial number will be
added to the Lamp History menu and the Lamp Hours timer will reset to "0". Lamp Mode
and Lamp Limit remain as they were for the previous lamp and can be changed at any
time.
Figure 3.23. Recording the New Lamp Serial Number
NOTE: Enter a serial number only if you have just installed a new lamp. This will help
ensure that lamp timer is not reset on an old lamp and that the number of hours logged
on the lamp will be accurate.
IMPORTANT
Always record the serial number of a NEW lamp.
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