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Maintenance & Troubleshooting
F
IGURE 15
Removing the filter door
3
Clean the filter.
•
Use a vacuum cleaner set on low power to remove the dust
and dirt.
4
Re-install the filter.
Replacing the Projection Lamp
WARNING: To avoid burns,
allow the projector to cool for at
least 30 minutes before you open
the lamp module door. Never
extract the lamp module while the
lamp is operating.
The lamp hour counter in the menus counts the number of hours
the lamp has been in use. The LP 740 uses a metal halide bulb.
These types of bulbs deteriorate over time. Replace the lamp
when the brightness is no longer acceptable. The lamp LED
blinks slowly after 950 hours; it blinks more rapidly after 1000
hours. You can order new lamp modules from your In Focus
dealer. See “Accessories” on page 34 for information.
Follow these steps to replace the projection lamp:
1
Turn off the projector and unplug the power cord.
2
Wait 30 minutes to allow it to cool thoroughly.
3
Place the projector on its side, then remove the 2 screws on the
lamp module door (Figure 16).
4
Pull the lamp door up and remove it.