Question about ViewSonic PJ503D Projector Lamp
We replaced the bulb in our Viewsonic PJ503d. The new bulb worked fine for approx. 20 minutes, then shut off. After rechecking the bulb install and trying to turn on again, no luck. Put the original bulb back in and it worked again. Got a free replacement blub that again, worked for 20 min. and now it only turns on when it wants to. It will go through a whole warm up cycle and then just power off again. I also hear a noise that almost sounds like something is "sparking" inside but I'm assuming it's the ballast trying to ignite the bulb. Any insight?? The bulb will ignite 30/100 attempts.
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Posted on Jan 02, 2017
i have the same problem, a clear image, the the projector shuts down, turn the fan on, and "lamp" blinks.
i returned my projector to viewsonic service center, they told me to change the lamp.
the problem is that a lamp is very expensive!
Posted on Aug 05, 2009
This is a classic VP930 problem.
It is caused by bad capacitors in the power supply circuit.
Open the monitor, and look at the power board. There are six capacitors. Replace the 220uF @ 25V and the 1000uF @ 16V capacitors. I would recommend replacing them with 35V and 25V capacitors respectively.
If the serial number on your monitor starts with Q8H you could also have a bad IC on the main board. Q8 on the main board is an FET in an IC package. If this problem persists solder a wire from the right side to the left side. There is one pin that turns the IC on and off. All the other pins (per side) are soldered together. Do not solder the pin on the left side that is by itself. Just leave it. Solder ALL the other pins on the left to ALL the other pins on the right.
Remember, do this ONLY if the problem persists after replacing the capacitors AND if your serial number starts with Q8H.
Posted on Sep 15, 2009
hi,guys with shutting down viewsonic t.vs.
As you power up your t.v continously press input button on your tv
until it powers on.Sometimes last all evening,someyimes for 5 minutes.
Posted on Dec 01, 2009
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
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