Question about ViewSonic LiteBird PJ1075 Multimedia Projector
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Posted on Jan 02, 2017
SOURCE: Viewsonic PJ550 lamp
Problem 1) The projector should put out a burst of 7000-15000 volts to start the lamp, and then immediately drop down to 60-100 vlts to keep the lamp lit. It sounds like the bulb blowing took out your ballast, or the ballast going out took the bulb (uncontrolled current = overheated bulb = boom)
Problem 2) Thats not a problem at all. HID lighting uses an arc to create light, just like welding creates light. Since it uses an arc, and not the heating of metal, there is no filament to test the resistance of. All the bulb is, is a special mixture of gasses and two very durable electrodes, with a gap in between.
Posted on Dec 02, 2009
SOURCE: Hi I have a view
Take a listen at the projector when it powers up... check if there is a whizzing sound and a buzz like sound. These are the color wheel and the ballast respectively. If one is missing take a look at that one first. If both are OK, then it is likely the lamp that is the issue. Like of the lamp is at 4000hrs if I am not mistaken.
Posted on May 03, 2011
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