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20 ViewSonic PJ750
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Maintenance
Projector Lamp
Lamp Unit
• To order a new lamp unit (part number) contact ViewSonic
Customer Support.
• Estimated lamp life is 1500 hours.
WARNING: Make sure the power cord is disconnected and the unit
is cool. Wait 45 minutes for the lamp to cool down.
Figure 7: Lamp Replacement
Replacing the Lamp
1
Gently turn the projector over and place it on a towel or blanket.
Expose the lamp cover on the bottom of projector.
2
Loosen the lamp cover screw as shown.
3
Gently remove the cover.
4
Loosen the lamp unit screws (after the cover is removed).
5
Gently pull the unit out of the lamp compartment using the flip-
up handle grip.
6
Gently insert the new lamp.
7
Replace the lamp unit screws.
8
Replace the cover and secure with the lamp cover screw.
Resetting the Lamp Timer
After replacing the lamp, the lamp LED lights a steady red and the
“Change the Lamp” message displays.
Within 10 minutes after turning on the power do the following:
1
Press (and hold for three seconds) the Reset button on the
projector control pad. The “Lamp hours” message displays on the
bottom of the screen.
2
Press the Reset button on the projector control pad while the
lamp timer is displayed.
3
Use the direction arrows to select zero (0) and wait until the
Lamp timer display clears.
Important: The message functions will not operate properly if the
lamp timer is reset without replacing the lamp or the lamp timer is
not reset when the lamp is replaced.