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ralpharch
Joined: 02 Nov 2007
Posts: 211
Location: Derwood
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| Posted: Sun Jan 11, 2009 6:45 pm Post subject: marquee 8110+ dot at top and TB 00-02 |
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I have a small dot at the top of my raster. It appears to be the dot referred to in below TB, so I have the fix available (add a capacitor in paralled with R85 on the VIM) Before I order capacitor just wanted to check if there was something else going on as my dot is not positioned per the TB (TB says centered; my dot is about 1/4th of the way over from the left side).
http://www.curtpalme.com/docs/ElectrohomeMarqueeTechnicalBulletin_Tb00-02.pdf
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun Jan 11, 2009 6:55 pm Post subject: Re: marquee 8110+ dot at top and TB 00-02 |
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| ralpharch wrote: | (TB says centered; my dot is about 1/4th of the way over from the left side).
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that's normal, I've never actually seen it on dead center
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sun Jan 11, 2009 11:46 pm Post subject: |
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I still think that's one of the most bizarre little oddities ever. How can that little change cause a single dot, or eliminate it?
I'd like to investigate the dynamics of that little goof.
CJ
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ralpharch
Joined: 02 Nov 2007
Posts: 211
Location: Derwood
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| Posted: Mon Jan 12, 2009 12:58 am Post subject: |
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| cmjohnson wrote: | I still think that's one of the most bizarre little oddities ever. How can that little change cause a single dot, or eliminate it?
I'd like to investigate the dynamics of that little goof.
CJ |
For what its worth - my symptoms are not solely a dot. That is the most prominant part (and not that prominant anyway). But I also get a faint vertical line down from the dot visible on very dark scenes
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Jan 12, 2009 6:08 am Post subject: |
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that's normal too, there's a "line fix" TSB as well although it's a bit harder to do. IT's also not necessary, if you set the machine to do FFTB then the line is not visible.
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ralpharch
Joined: 02 Nov 2007
Posts: 211
Location: Derwood
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| Posted: Mon Jan 12, 2009 11:26 am Post subject: |
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| draganm wrote: | | that's normal too, there's a "line fix" TSB as well although it's a bit harder to do. IT's also not necessary, if you set the machine to do FFTB then the line is not visible. |
I had to look that up - full fade to black; yes I have the brightness up some to get some deep shadow detail that I wouldn't get if I had perfect blacks. I'll live with the line as it is very very dim
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richmond5
Joined: 17 Aug 2007
Posts: 48
Location: Toronto, Canada
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| Posted: Mon Jan 12, 2009 12:07 pm Post subject: |
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What is FFTB , full fade to black. I have the faint line problem too. I follow the TSB and the faint line disappear. The problem is after the TSB, I have to reduce the Brightness to half of before the fix and as a result reduced the machine's contrast ratio , I don't like it a bit!
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1031
Joined: 22 Mar 2006
Posts: 657
Location: Finland
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Jan 12, 2009 6:07 pm Post subject: |
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yeah I've see nthat too, after the line fix the brightness needs to be set around 30 for good black levels, not a big deal. | ralpharch wrote: | | I had to look that up - full fade to black; yes I have the brightness up some to get some deep shadow detail that I wouldn't get if I had perfect blacks. I'll live with the line as it is very very dim |
You can actually have FFTB and nice shadow detail if you have a Moome card with Gamma or some other device which can tweak the low end. i've heard that a nice scaler can do even better than a fixed device and allow a totally custom curve.
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ralpharch
Joined: 02 Nov 2007
Posts: 211
Location: Derwood
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| Posted: Tue Jan 13, 2009 4:41 am Post subject: |
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| draganm wrote: |
You can actually have FFTB and nice shadow detail if you have a Moome card with Gamma or some other device which can tweak the low end. i've heard that a nice scaler can do even better than a fixed device and allow a totally custom curve. |
I do have the Moome Ext-HD version. Someday I may try expanding the gamma range again. Last time I did that I adjusted the wrong pot inside the unit (no wonder I wasn't getting the gamma to change). As it is I believe it is set to maximum and although I notice some improvement in shadow detail its not that dramatic so I do leave the brightness up at least enough that those vertical lines are faintly visible on FFTB. Not a big deal for me - easier than stripping the head off the screws on the Moome box to try and reset the pot again.
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