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A piece of good advice

 
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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 4:16 pm    Post subject: A piece of good advice

A piece of good advice

For the last couple months or so, I've had issues with my NEC PG9 in that the convergence was off every time I turned it on.
I would fix it by using the Point function. It would stay put for the evening (4 8 hours) and then when I turned it off at night and on again the next day it would be off again. I Googled the issue and found that it could be the capacitors on my convergence board and would
need replacing. So i searched for a fix specific to my issue and found nothing.
I remembered reading somewhere that my Point convergence should be no more that 4 clicks off, in otherwards if it took more than 4 clicks to align the grid, it would
need to be tweaked with the other controls and not the Point board. So I decided to zero out the pointboard to see where I was at. Whoa, it was off at least 1" in some spots, so I tweaked everything
back into shape and was able to get it within an 1/8 inch or better.Then I used the point control to finish it off, I need no more than 3 clicks on the remote to do this.Its been very good the last few days.
So, anyway, my advice is to tweak your projector without using the point control to avoid this drifting issue, or zero out the point ocasionally and redo it as described above. So I didnt mean to get so
windy and type a novel about this problem but I think it is good advice, WHAT DO YOU THINK?
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Person99



Joined: 09 Mar 2006
Posts: 4899
Location: Flower Mound, TX

Posted: Thu Oct 23, 2008 4:25 pm    Post subject: Re: A piece of good advice

garysorenson wrote:
I think it is good advice, WHAT DO YOU THINK?


Not be an a$$ (but it IS my reputation), this is good advice. It is the approach used in every set up procedure including the ones on this site. Basically (regardless of brand) the approach is:
1) Zero out (i.e. midpoint) all electronic controls.
2) Perform mechanical set up to get as good as possible.
3) Perform course control electronic set up to get as good as possible.
4) Perform fine control electronic set up to get as good as possible.

Some PJs such as early barcos do not have seperate course and fine control so this is one step. Others such as later barcos, NEC with point boards, etc have both.

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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 4:33 pm    Post subject: What I was trying to say

What I was trying to say and I may not have explained it well is not as the initial setup is concerned but more of a maintenance issue to ocasionally zero out the Pointboard to confirm your initial setup (4 clicks max) and not to tweak it with the Point tool every time its off
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kschmit2



Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany

Posted: Thu Oct 23, 2008 4:35 pm    Post subject:

It was the advice I gave you in another thread a couple of days ago.

See here:
http://curtpalme.com/forum/viewtopic.php?t=12914 and here:
http://curtpalme.com/forum/viewtopic.php?t=12958

So, now you claim that this is something you came up with?

garysorenson wrote:

So, anyway, my advice is to tweak your projector without using the point control to avoid this drifting issue, or zero out the point ocasionally and redo it as described above. So I didnt mean to get so
windy and type a novel about this problem but I think it is good advice, WHAT DO YOU THINK?


I think you just did come up with a windy novel by leaving out most of the facts.
And if I didn't know that my advice was sound, I wouldn't have bothered posting it in the first place.
Btw, Tinman and stefuel have also chimed in there.

Kai
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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 4:42 pm    Post subject: What da Fuk

Pardon em f*ck*** Wa if I didnt read all the attachments on yesterdays posts, At the time, there where only 3 or 4.
This wasnt meant to be an insult of anytype. All I was doing was trying to tell you guys something good. It'l probably never happen again since my 2cents is only worth a handfull of dog sh*t.
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rabies_70



Joined: 15 Feb 2007
Posts: 1189
Location: Carlsbad, CA

TV/Projector: Sony G70Q

Posted: Thu Oct 23, 2008 5:49 pm    Post subject:

BWAHAHAHAHAHAH Twisted Evil You guys are funny. Dog sh*t....classic. Such kidders
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Thu Oct 23, 2008 6:19 pm    Post subject:

... A handfull of dogshit. That is classic.

Hey Gary - no need to get pissed off. Kai was just telling you that he had already told you exactly that, and that it's common knowledge for most of us.

The thing is, there are a lot of VERY knowledgeable people on this site who have been installing, operating, and even designing CRT projectors (or parts of them) for a couple of decades. Guys like me who have been around CRT projectors for 7 or 8 years know quite a bit about them, but I also realize I know a tiny bit compared to many of the people who post here.

Kai happens to be one of the more knowledgeable people on the site, and I can see how he might have been annoyed by your post - it did, after all sound a lot like you though you had come up with some sort helpful hint that nobody has written about or pointed out anywhere.

On the contrary, I'd be willing to bet that there are literally dozens of posts which describe the very idea you conveyed: To setup, first zero out point and all other controls, get convergence the absolute BEST you can with geometry controls, and resort to point convergence only as the very last resort to completely converge every part of the image. In fact, on page 6 of CRT setup guide, it reads:

http://www.curtpalme.com/CRTSetupGuide6.shtm

Quote:
Point adjustment
Once you have the convergence grid adjusted so that hopefully it’s about as good as the above image, you can now take the remote and go very close to the screen and use the point convergence to fine tune the image. It’s very easy to overdo the point convergence. Generally speaking, you shouldn’t use more than 4 presses of the arrow keys in any direction, nor should the convergence be out more than one or two test pattern line thicknesses. If it is not looking as good as the above, go back and fine tune the basic convergence and geometry controls to get as close to the above image as possible.


If I had written the guide, I would emphasize the point we're discussing here - both at the beginning and end of the geometry sections, and the beginning of the point section - because it is KEY to getting a nice, stable setup.

But, no big deal. We're all friends here. Move on.

I will offer one bit of advice. Read, read, and read some more. Even though this forum has only been in existence for a couple of years, there is a veritable wellspring of information about CRT projectors here - from setup, to installation, to tweaking and modding. Everything from basics to really advanced procedures. But, you do have to be willing to be do some searching and reading. Often, great tips up setting up CRT projectors in general may be in some thread about a Sony G70, or an NEC PG.

Cheers,
SC

PS - Oh, and use the site tools to subscribe to threads you start - that way, you won't miss replies to your own thread after you've moved on to other things. I'm guilty of the same thing. I try to remember to subscribe to my own threads so I don't miss good points made after I quit reading.
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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 7:12 pm    Post subject: Kal

Sad The absolute last thing I intended to do was insult anyones intelligence or steal any advice. However, when driving home last night I thought this would be a good way to check my convergence. Mabey I am a bit behind on things but the idea did come out of my head too. Have you ever thought of a real cool invention or idea only to find out someone else beat you to it? This only enforces the importance of this step in projector setip.
So anyway, my humble apologies for stepping on your toes, again, that was the last thing I wanted to do.
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Thu Oct 23, 2008 8:06 pm    Post subject: Re: Kal

I can't speak for Kai, but I'm sure it's no biggie!

garysorenson wrote:
Have you ever thought of a real cool invention or idea only to find out someone else beat you to it?

I do know the feeling. It happens to me at least a couple of times a year. I think of a cool idea, then do the research to see if anybody else has thought of it, and of course, they have. Pisses me off every time.

I did think of a cool idea earlier this year that I thought was good enough to pursue. I did the research and I can't find anything like my idea. I talked to a patent attorney about it, and he said it was probably a $6,000-7,000 proposition just to apply for a patent. Then, on top of that, you have the product design and manufacturing... Figure another $10k on top of the $7k... And I'm overwhelmed. I don't know whether to try to do it or not, and if I did, I wouldn't know where to get the money. Sad

The attorney said some people try to shop the idea around to prospective buyers, some people try to manufacture and sell the product to a big buyer like Walmart or something, while others try to manufacture and sell the product themselves direct. The attorney said he always recommends his clients do all three if possible.

Thinking about it, still. Somebody will probably do it while I'm thinking about it and make a million dollars.

Argghhhhh... Sorry for the off-topic rant - you hit a nerve.

SC
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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 8:15 pm    Post subject: Patent Money

Several years ago my older brother was in the same situation as yourself.
He was able to borrow the money from his bank by bringing in all the paperwork and documentation.
He went right to the top to talk with the president. He was able to borrow 80,000.00 on his line of credit.
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Thu Oct 23, 2008 8:20 pm    Post subject:

Hmmm... Interesting. How'd that work out for him? I mean, how has the idea/venture out?

SC
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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 8:55 pm    Post subject: The Adventure

It worked out pretty well. He payed back the bank and sold the product line to Newell Corporation who supplies Builders Square. The product is an extensible paint roller called The High Roller. Now he collects royalties from it and is well protected by the patent on the product.
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garysorenson



Joined: 17 Jul 2007
Posts: 63
Location: Milwaukee, Wisconsin

Posted: Thu Oct 23, 2008 9:49 pm    Post subject:

Do you recall how many claims where in your patent. The more claims you have, the stronger your protection is but it will cost more.
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perisoft



Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY

Posted: Fri Oct 24, 2008 2:33 am    Post subject: Re: Kal

garysorenson wrote:
Have you ever thought of a real cool invention or idea only to find out someone else beat you to it?


Vinyl ads on supermarket checkout belts. Captive audience, cheap, and novel. Absolutely perfect - and someone had patented it *six months* before I thought of it. Argh!

Anyway, one thing I'm curious about (here's hoping it's a somewhat novel question) is how this applies to newer Barcos, where there's no separate geometry for R and B, and the coarse convergence will NEVER get within four clicks. My electronic setup is good if not perfect, so I don't see how it could get THAT much better to where point isn't pretty much the major convergence method. Are Barcos just different that way?

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ecrabb
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TV/Projector: JVC RS40, Epson 5010

Posted: Fri Oct 24, 2008 3:42 am    Post subject:

Gary, I don't remember exactly the number of claims - I have it in my notes. The patent atty said there was a "standard" number of minimum claims... I think it was 8 or 10 or something. And you're right - more claims was more money. He said an idea as simple as mine would be fine with the standard number of claims - which was the six or seven G's figure. Something more complicated (say a mechanical tool or iPod or something) might need many more.

No separate geometry for red/blue on the Barcos? Seriously? That's ridiculous. I don't see how that would even work!

SC
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perisoft



Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY

Posted: Fri Oct 24, 2008 3:50 am    Post subject:

ecrabb wrote:

No separate geometry for red/blue on the Barcos? Seriously? That's ridiculous. I don't see how that would even work!

SC


Not that I've been able to find! Smile There's a rough convergence that basically equalizes the error between the two sides and the top and bottom, but aside from that it's all point. Kind of a pain in the ass, because the point is too coarse for my taste - maybe a quarter pixel adjustment. And you can get to a point where you have to recursively go back and forth to avoid the left edge being too far to the left while the zone immediately to the right is a little bit too far to the right...

Some of that is probably my electronic setup, which isn't optimal right now, but as I said, even with a very good electronic setup you have to use significant point to get things lined up.

It could be that the point, in effect, does geometry control - the zone immediately to the right of center, for instance, basically acts to scale EVERYTHING horizontally to the right of center, and vertically it skews everything - so maybe that's how it works without being a total disaster.

I do know that you don't have to worry about getting weird lines or other errors by using too much convergence. You can fix some pretty horrible errors without visible problems - aside from the obvious stress on the electronics.

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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada

TV/Projector: Sony 1252Q, AMPRO 4000G

Posted: Fri Oct 24, 2008 5:04 am    Post subject:

perisoft wrote:


It could be that the point, in effect, does geometry control - the zone immediately to the right of center, for instance, basically acts to scale EVERYTHING horizontally to the right of center, and vertically it skews everything - so maybe that's how it works without being a total disaster.

.


Hey that sounds like something my AMPRO does ( looks around for Pete, [[[ducks]]] )

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