Question about InFocus Replacement Lamp Projector Lamp For X1 Projector&Screenplay 4800 [ SP-LAMP-009

2 Answers

Lamp resistance and voltage

The Infocus X1 projector gives an indication that the "lamp is not firing after 5 attempts". Before I spend the money on a new lamp, can I check the Ohms of the lamp (I get infinite ohms) or can I check the voltage to the lamp (approx. 129VAC at the connector) to confirm that it is the lamp? It is alot of money to buy the lamp if the unit is at fault. In other words, is there a way I can confirm it is a lamp fault, or, could it just be the projector itself?
Thanks, Mike

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  • smartipantz0 Feb 22, 2009

    Hi, just replaced an infocus dlp X1 lamp for my projector, turned it on sounded like it was firering up, the the green light went red. I turned off the projector. I dont have instructions on how to tune it up can you help

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1. Projector lamps use customized ballasts that ignite the lamp by charging it with a higher voltage in the ignition phase and then dropping down to a lower running voltage once the circuit is created.

2. Projector lamps CANNOT be tested with an AMP or OHM meter. Projector lamps function by igniting ultra-high pressurized mercury vapor across an ARC tube. At the point where the mercury vapor resides there is no conductive electrical material and therefore testing a projector lamp with an AMP or OHM will not work.

Posted on Jul 10, 2009

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Projector lamps can be tested using automotive HID(xenon) ballast although it won't tell you much because even if it lights up it doesn't mean that projector is capable to ignite it also. Old lamps require much higher voltage to ignite and draws more current.

Posted on Jul 05, 2013

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