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beerbujit
Joined: 13 Jun 2006 Posts: 29 Location: halethorpe, md
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Link Posted: Tue Dec 13, 2011 3:33 am Post subject: I turned the wrong one! |
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OH NO! I accidently turned the Contrast pot instead of the Gamma pot on V2 internal ehome card. I know it has to be set @ .7v but how and where do I take readings. Can I use a scoping meter or only an o-scope?
Thanks, and stop laughing.javascript:emoticon('')
Steve
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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dturco
Joined: 06 Feb 2009 Posts: 3779 Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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Link Posted: Tue Dec 13, 2011 4:29 pm Post subject: Re: I turned the wrong one! |
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beerbujit wrote: | OH NO! I accidently turned the Contrast pot instead of the Gamma pot on V2 internal ehome card. I know it has to be set @ .7v but how and where do I take readings. Can I use a scoping meter or only an o-scope?
Thanks, and stop laughing.javascript:emoticon('')
Steve |
Marquee of some flavor.
I did that too. I never did find out how to get .7 volts, but I did adjust it while I had the DVE test disc in and display the video black screen and re adjusted it to be black. It was black so I guess I have it close enough.
I think the only way to be 100% sure is to do it is with an extender board. I don't know where to get one though.
_________________ Firefly rules. Can't stop the signal.
http://www.hulu.com/firefly
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Nashou66
Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY
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beerbujit
Joined: 13 Jun 2006 Posts: 29 Location: halethorpe, md
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Link Posted: Tue Dec 13, 2011 10:41 pm Post subject: |
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Yes it is a 8500 marquee, I just got a response from Moome and he said I would need an external box to power the VIM outside projector and read voltage on the DAC... A.. Yeah ... OK.... that's what I thought' I saw those little point of use oscilloscopes but don't know if that would be any good as it would just probably just read RMS voltages. Not sure. I like the idea of reading it from the green neck board but again that would not be peak to peak voltage. If you set the pot would it EVER need to be adjusted again? why have the pot on it then?
Just typing out loud here.
Thanks guys,
Steve
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beerbujit
Joined: 13 Jun 2006 Posts: 29 Location: halethorpe, md
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Link Posted: Sun Dec 18, 2011 2:21 am Post subject: |
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I just got a reply from Moome. If anyone wants to know how to check the contrast voltage, here is the answer.
Steve;
It is the testing kit that we are doing calibration.
You can solder two tiny wire each to C215 two node, and measure these two node with a voltage meter, the value should be 0.86~0.88V
Let me know if you need more information.
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beerbujit
Joined: 13 Jun 2006 Posts: 29 Location: halethorpe, md
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Link Posted: Sat Dec 31, 2011 2:55 am Post subject: |
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Well, with the help of my good buddy MP I now have a way to adjust the contrast properly.
Thanks Mike and HAPPY NEW YEAR everyone
Steve
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