CurtPalme.com Home Theater Forum

[jeffslife]

Me again,
I was having no luck focusing the dots and then I read ecrabbs G70 Owners thread, and WINDUPTOY
cleared some of it up fore me. I was changing the 128 number to 40 per (I thought ) what the manaul said, instead
of substracting 40 from the 128 number.
Now what I am not clear on is when you add 80 do you add it from the (128 - 40 number =88 ) OR do you add it to the 128 number = (208) ?

I am going to have other questions on another matter so please bear with me today and remember I need detailed
explanations as I am a complete idiot.

I just want what all you guys want, I just dont have the knowledge or vocabulary to make sense of it all.
So I humbly request your help and patience.

[perisoft]

Just ramp through the focus both ways; you'll see how it affects dot shape. It's not that it won't work one way or the other, it's just easier if the dot's overfocused than underfocused.

Set 2PH, 2PV, PA, and 4PD to 128. Zing the focus way up (I go to 200; doesn't matter); just make sure you get flare. If it's round, you don't need to mess with it.

So say, instead of a dot you get:

Within that dot, there'll be a brighter part. 2PH and 2PV move that bright bit horizontally and vertically. So with 2PH low, and 2PV high, the bottom left of the will be brighter.

So, adjust 2PH until the bright bit is centered horizontally, and 2PV until it's centered vertically.

One thing to remember is that when you're staring at this streak, it'll start to look uniform after a while even if it's not. You have to look away periodically and then you'll go, 'ahah, now I see where the bright bit is'. Sometimes it takes a couple of go-arounds.

All right, now you've got the streak to be bright in the middle.

4PA and 4PD are a bit stranger to work with. Because you're already seeing something like or or , it can be hard to tell how it works.

Basically, though, if you have a streak that's like instead of , it'll change the to and back. Imagine having an o-ring in front of you on your desk; put two fingers in it and stretch the o-ring apart vertically. That's 4PA set one way. Now slowly let the o-ring go back to normal, and then stretch it apart horizontally - that's 4PA the other way.

But you're probably seeing this with the dot already distorted a bit diagonally, so it can be hard to figure out what's happening. It looks like you're rotating the streak, but you're not. In the end, what you're after is a diagonal streak that's as short as possible. If your 4PD happens to be set correctly, just changing 4PA will make the dot round.

If not, 4PD is necessary. Remember how I said that 4PA changes a dot from to and back? Well, 4PD changes it from to and back.

Basically, if you've got a nice 45-degree , you use 4PD to fix it. If you've got a , you use 4PA to fix it. Probably, you'll need a bit of both.

Hopefully this helps a bit. I'm only just getting into the G70 myself, so if I've mucked something up, feel free to correct me!

[jeffslife]

That helps alot. The first time I tried it and went back to picture the convergence was WAY off. So I chickened out and went back and changed all the numbers back to 128 on the dots and got my good (but not great) picture back.
I feel a little more comfortable now trying again. Thanks

[dvh99]

using a 1on 1off (horizontal and vertical squares)pattern is easier to work with for astig, that was my latest experiment with astig and i got much better overall focus.

[jeffslife]

I am not sure what pattern you mean.I can get a square or a square within 4 squares (9 positions)

[dvh99]

no its not an internal pattern.
you should never use internal patterns btw only for general focus.

[dturco]

[jeffslife]

I have AVIA 1 on dvd and thats it what do you suggest.

[dvh99]

you can draw the patterns you need in paint if you would like.
ie, a big x from corner to corner for linearity a grid pattern for convergence a dot pattern for astig or look on the www for usable test patterns.
no need to spend money really.

[jeffslife]

I donot have my laptop connected to my pj and dont have any way (that I know of ) to do so.
I cannot seem to get the internal test patterns close, I can get MOST of the dots fairly round
but then they dont seem to line up.
I seem to have better luck with the BD connected and playing, I have no clue why.

[perisoft]

Using a DVD for test patterns when you watch bluray is folly. In fact, I can't imagine using DVD for test patterns could possibly be any better than the genlocked stuff - 720x480i? It's hardly going to be a challenge to resolve _that_...

[jeffslife]

So how to resolve?

[ecrabb]

What BD player are you using? You should be able to download the AVS Rec 709 disc image, burn it to DVD-R, and play it in your BD player.

http://www.avsforum.com/avs-vb/showthread.php?t=948496

SC

[jeffslife]

sony s550

[stefuel]

Guy's, TMI!!!
He has to learn the technology and the basics of setup before he gets into any advanced stuff. The internal patterns should be a good enough place to start.

Don't spend to much time per seating with test patterns up at high contrast. You'll burn them into the tubes.

Read the Guy Kuo "Holy Focus" thread. It's NEC spacific but the theory is generic for all CRT's. It is also advanced setup stuff that you should probably not concearn yourself with yet but there is a ton of usefull information there.

Don't worry about getting it perfect the first time through. You won't get it perfect the tenth time through. It takes years of practice to get it perfect. It still takes a pro calibrator a full day to correctly set up a single CRT projector that is in perfect condition.

[jeffslife]

well, I was able to download and burn the disc but not the PDF file to go with it.
It wouldnt let me have that because IM not a member.
avchd patterns manual.pdf

[AFryia]

[jeffslife]

so I need a BD test disc, with this H pattern?

[AFryia]

No it's one off the internal patterns.

IMO the BD disk will come in handy for geometry and convergence. I don't know if it will help with AQP DQP with the PJ not fully resolving BD.