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How long should a projector be left unplugged before its safe to touch

the High voltage lines for cleaning. !


And what's the best way to clean them to prevent arching ?



Thanks
 

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In a normal working set 5 minutes is usually ok. However if the set has problems in the HV or focus divider circuitry a week may not be enough. I always try to measure it with a HV probe to make sure, I got bit once and never again!


I always use isopropyl alcohol and allow plenty of time for it to dry, then if needed use an electrostatic plastic spray on the tube around the HV connection. Most projectors now days use sealed connections at the CRT for the HV connection so don't mess with these.


Good Luck, Don
 

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Chances are if they're arcing, they need replacing as the insulation is breaking down...


Curt
 
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