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wallace123456
Joined: 14 Aug 2006
Posts: 2236
Location: Northwest VA area
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| Posted: Fri Nov 06, 2009 12:06 am Post subject: How are S-Curve adjustments done on Runco? |
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Looking for some tips or directions for adjusting the S-Curve on a Runco 930/933.
Is it pretty much eye-balling it for each CRT?
Here is the board as some have asked what and where it is. It is a small piggy-back on the Wave board:
wallace
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Fri Nov 06, 2009 4:53 pm Post subject: |
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I would put up a grid, turn of r and b and then turn the G pot on this board.
The Xtra's or in your case 933's, always had line distortions that were impossible to get perfect....I think this board corects those distortions. I would be looking at the top and bottom of the grid...likely neither are perfectly straight as-is and will require some correction via that board.
Ben
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wallace123456
Joined: 14 Aug 2006
Posts: 2236
Location: Northwest VA area
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| Posted: Sun Nov 08, 2009 1:58 am Post subject: |
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| benareeno wrote: | I would put up a grid, turn of r and b and then turn the G pot on this board.
The Xtra's or in your case 933's, always had line distortions that were impossible to get perfect....I think this board corects those distortions. I would be looking at the top and bottom of the grid...likely neither are perfectly straight as-is and will require some correction via that board.
Ben |
Ben, thanks.
After posting this, I messed around with the adjustments. While I was able to get a center horizontal line really good, the top and bottom lines got worse.
Ken also advised of the same thing; that is to watch the top and bottom.
My thought (question) was, where in the process of set-up (from scratch) do I adjust the s-curve? (Before or after phase?)
wallace
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Sun Nov 08, 2009 3:45 am Post subject: |
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likely after....you could experiment and see what works best.
post a screen shot. I've had several PGXtra's, and they never have a straight line top and bottom...I also had a 933 and was unaware of this adjustment!!! 
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Sat Nov 14, 2009 6:42 pm Post subject: |
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Just wondering if this worked or not...
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat Nov 14, 2009 7:03 pm Post subject: |
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Get a point board and forget about that board..
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wallace123456
Joined: 14 Aug 2006
Posts: 2236
Location: Northwest VA area
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| Posted: Sat Nov 14, 2009 10:16 pm Post subject: |
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Adjust the S-Curve after Phase. And, adjust to the top and bottom. It does help in getting a square/rectangle image from the begining. Also much easier on the keystone, bow and pin-cushion.
I have a point board but don't want to use it until the end of set-up and most certainly, not on green. Maybe I'm wrong.  I don't have the experience and knowledge of the pro's, so, I learn by my mistakes. And there is a bunch of them.. 
If I could write a manual on what not to do, well, it would be hundreds of pages. I think I have found just about everything you SHOULD NOT DO!!!!  But I still enjoy this stuff.... 
wallace
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