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Electrohome 8500 power problem

 
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bushcr



Joined: 14 May 2009
Posts: 2
Location: Ontario

Posted: Mon Aug 12, 2013 4:16 pm    Post subject: Electrohome 8500 power problem

Looking for an armchair diagnosis re my projector. The projector will not power on. I have replaced the LVPS and it still will not power up. There is a red led on the front of the LVPS power supply and the far RHS light is on and steady. Ay ideas?
Thanks CB
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Tim in Phoenix



Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix

Posted: Mon Aug 12, 2013 4:50 pm    Post subject:

Hello

The LVPS is in "hold down", meaning power is shorted to ground, it will not come up and damage itself, it sounds like the +15 rail.

LVPS LEDs table standing.........left -15 -85 -24 +5 +24 +85 +15........right These are reverse on a ceiling

The following boards use +15 so unplug as many as you can and see if the LED shuts off: Focus, HDM, Vertical, Convergence, (try these first as they drive yokes and may have been hit by an arc), CLM, Neck boards (unplug one at a time), VIM, Color Correction and ACON
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mx83toy



Joined: 14 Dec 2012
Posts: 322


Posted: Wed Aug 14, 2013 2:11 am    Post subject:

Great explanation Tim
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Tim in Phoenix



Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix

Posted: Wed Aug 21, 2013 1:28 am    Post subject:

Hello


Any luck with this?
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