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reio-ta
Joined: 12 Jan 2008
Posts: 5
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| Posted: Thu Feb 21, 2008 9:53 pm Post subject: HELP!! My CRT died?It makes a screech sound and tubes flash |
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Dwin HD700
What does it mean if the tubes make a terrible grinding noise and the LED indicator light flashes wildly and not on/off slow blink when you plug it in? I was watching a movie and it just goes SCREECH really high whine and then nothing!
HELP!!!! Is there anything I can check?
I unplugged all the inputs and still nothing!
It's a blue spark near the blue tube, they all turn on for a fraction of a second then turn off immediately. HV leak?
There's a bunch of brown crud(lots of crud, assuming is resin and very little solder) around all the yellow wires on the three tubes that's above the copper coils. The green, red, yellow blue on each tube.
http://curtpalme.com/images/Dwin_image04.jpg
I was using 1080i using these settings:
VTOT 560 HTOT 2396
VACT 540 HACT 1920
VSYN 0 HSYN 255
VFRN 1 HFRN 7
Contrast 18 and Brightness 44
I was also using the projector's blanking feature to not display the inactive pixels.
Is that bad?
I shouldn't have ever bought from someone I don't know from the internet, I'm a dummy 
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Fujifrontier
Joined: 20 Oct 2007
Posts: 354
Location: San Antonio, Texas
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| Posted: Thu Feb 21, 2008 10:39 pm Post subject: |
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wtf?
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reio-ta
Joined: 12 Jan 2008
Posts: 5
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| Posted: Thu Feb 21, 2008 10:46 pm Post subject: |
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So that's not how a wire is supposed to look?
I forgot to put, the person I bought it from replaced the 50 ohm video wire with 75 ohm. Could that have caused the failure?
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reio-ta
Joined: 12 Jan 2008
Posts: 5
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| Posted: Thu Feb 21, 2008 11:34 pm Post subject: |
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There's a corona and ozone being released, in case that helps. I asked my EE friend.
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WRUX
Joined: 15 Feb 2008
Posts: 11
Location: PDX
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| Posted: Fri Feb 22, 2008 12:06 am Post subject: |
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I just erased my previous message, I didn't relize what part of the projector that was a picture of.
I think your problem is in the high voltage area of your projector from the issues you are describing.
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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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| Posted: Fri Feb 22, 2008 7:05 pm Post subject: |
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Where exactly did the blue spark come from? Using the blanking is fine.
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reio-ta
Joined: 12 Jan 2008
Posts: 5
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| Posted: Fri Feb 22, 2008 7:41 pm Post subject: |
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| Brooklyn wrote: | | Where exactly did the blue spark come from? Using the blanking is fine. |
Looks like the corona blue spark is coming from somewhere near the flyback transformer(LOPT).
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