AVS Forum banner
Status
Not open for further replies.
1 - 15 of 15 Posts

·
Registered
Joined
·
401 Posts
Discussion Starter · #1 ·
I've searched both the live forums and the archives for words like "guide", "beginner", "tutorial" and so forth and haven't come up with anything good. Therefore I apologize if this is something that has been covered before...


This forum is a wealth of knowledge for the mid-level CRT owner, with all sorts of great tips and tweaks but as a new CRT owner, I'm having a hard time finding the basics.


For example: I can find all sorts of threads arguing the finer points of scheimpflug but nothing about just what the hell it is! Same goes for lots of other terms and techniques. It also seems that a lot of the times the answer is "hire this or that ISF guy to do it" which is completely understandable, but I think a lot of people here did it themselves. Which is most likely the way people would like to try at first, before admitting defeat and calling the experts :).


Here's what I'm looking for as the new owner of a CRT projector currently intimidating me from the other room:


Something that will take a person (say, oh, me for example) from step 1 right through the initial set-up steps of a CRT projector. Basically I've got it out of the box and plugged in, how do I get from a horribly converged image to 80% of perfection in 12 easy steps? ;) I've got the installation manual for my unit, but it takes a lot of things for granted in the way it explains things. I suspect that its authors intended it to be read by someone with ample experience in the field, not by a complete and total novice.


If such a document does not exist, then I'd love to step up and make it happen, amalgamating your expert input into something that would take a new owner right through the process of their first week with a CRT projector.


Things like: What settings do I do first? How do the settings work? What settings should I not touch? Which should I not crank all the way to max/min? Which settings can be potentially damaging? How do I know when I've got it right? What order do I change things in? Do I have to go back and re-do some after making changes in another area? Should I just tweak in software or are there any hardware/physical tweaks a beginner should do?


I know that some answers could be dependant on the make/model of projector, but that could also be addressed in the document, explaining both ways.


If such a document does exist, then I'd be most obliged if you'd throw a link at me and tell me to pipe down and do my homework, and we could add it to the stuck "CRT Links" thread at the top of the forum.
 

·
Registered
Joined
·
767 Posts
Search on some of my posts.. I have on a few occasions provided high level work flow type direction.


Give that a try.
 

·
Registered
Joined
·
5,034 Posts
What pj? Much is different depending on make and model.

Tell us what you have, there are some different web sites for different pj's.


No sense explaining scheimflug if your doesn't even have it.


Troy
 

·
Registered
Joined
·
401 Posts
Discussion Starter · #4 ·
Quote:
Originally posted by pcCinema
What pj? Much is different depending on make and model.

Tell us what you have, there are some different web sites for different pj's.


No sense explaining scheimflug if your doesn't even have it.


Troy
Well, yes and no. I want to put together a document for everyone, as much as is possible, not just myself. Explaining scheimpflug to me could be the last time it has to be re-hashed on the forums. I'm envisioning something along the lines of "if your projector has X feature, do it now and here's how, otherwise skip to section D." I'm not looking for the exact menu items and so forth, that much would be impossible to set out for every projector, just what settings to change, how to change them, and in what order; things that could apply to setting up any old CRT projector for the first time.
 

·
Registered
Joined
·
767 Posts
What's your starting point, in terms of YOUR knowledge. The work flow is largely the same aside from subtle differences. Some call a feature this, some call a feature that and some don't have"that" feature.


But, the overall process of normalizing the chain is the same. There are tons of posts on here that describe the process. It would be possible to organize the info as a matrix with the steps vertically and the projectors horizontally. Just fill in the squares, some will have N/As of course.


Marc
 

·
Registered
Joined
·
8,079 Posts
search for "Holy Focus" and "Guy Kuo"


Edit: Look in the FAQ sticky thread at the top of the forum.
 

·
Registered
Joined
·
401 Posts
Discussion Starter · #7 ·
Quote:
Originally posted by genmax
What's your starting point, in terms of YOUR knowledge. The work flow is largely the same aside from subtle differences. Some call a feature this, some call a feature that and some don't have"that" feature.


But, the overall process of normalizing the chain is the same. There are tons of posts on here that describe the process. It would be possible to organize the info as a matrix with the steps vertically and the projectors horizontally. Just fill in the squares, some will have N/As of course.


Marc
My starting point is that I know what a CRT is that you have to converge them, focus them, and a few other things to get them working right. That's about it.


I'm sorry I never picked up on the posts, can you think of a couple keywords I could search the forums/archives for that would bring them up for me?

Quote:
Originally posted by Mark_A_W
search for "Holy Focus" and "Guy Kuo"


Edit: Look in the FAQ sticky thread at the top of the forum.
The "Holy Focus" by Mr. Kuo is far too advanced for me at this stage. It also doesn't cover lots of simpler things that are necessary for proper projector calibration. I've been to all the FAQ links and didn't find anything for the beginner, which has surprised me.
 

·
Banned
Joined
·
9,999 Posts
Quote:
Originally posted by xamphear
For example: I can find all sorts of threads arguing the finer points of scheimpflug but nothing about just what the hell it is! Same goes for lots of other terms and techniques.
I found this on a 20-second Google search. :) Guy's Astigmatism
 

·
Registered
Joined
·
860 Posts
here is a real quick list of things to do

First make sure you use your install manual to make sure your set up is to spec. Is the screen the right size? Are all of you angles true? Make sure everything is physically set up correctly before you adjust the electronic aspects.

Generally the first thing you will do after the install is get the PJ in focus. "Holy Focus" has to be the best focus description on the forum. Although it is in depth, it is import to follow for the best focus. Make sure you address both optical and electronic focus. Optical means adjusting the actual lens, electronic will be either Electrostatic or Electromagnet depending on your model. Also make sure that the image is centered on the tube face. The simple way to do this is to turn the contrast down (so you don't go blind) and run a test pattern while looking into the lens. You should be able to get a good idea of when it is centered. Then make sure it is centered on the screen. If your setup is physically correct, it should be close on the screen. But move the screen or realign the PJ if it is not. After you get your focus down then begin converging.

Your install manual should have a guide for converging. This is going to be a bit different for each projector. In general make sure you go through all the steps and take a lot of care. It is probably good to have a freind lend an extra set of eyes. Try not to rely on multi point convergance (assuming your PJ has it). Instead use size, skew, keystone, pincushion and so on. It can be tempting for the beginer just to try the multipoint without getting the other settings correct. But spend the time getting the other setting correct first and then FINE TUNING with multi point convergance.


In general don't be to scared of destroying your projector with an incorrect setting. Still there are a few things to keep in mind. Running the contrast to high will shorten tube life and increase the possibility of burn. Try not to run it much higher than default. And avoid running static images such as a windows desktop or a video game (that will always have things like health or score in the same place).

Make sure the image is centered on the tube face (as I mentioned.) If it is way off and running onto the side of the tube the heat can eventually crack the neck from what I hear.

Also try not to run the projector often for a short period of time. Most of the stress on the tube occurs during warm up (make sure you run the warm up cycle by the way). So its probably not worth turning on the projector just to watch a half hour of the simpsons.

I don't know if this helped or not. If you have more questions ask them specifically as HoustonHoyaFan said. Also if anyone sees something important that I left out or got wrong, feel free to post.

Matt
 

·
Registered
Joined
·
401 Posts
Discussion Starter · #11 ·
Quote:
Originally posted by HoustonHoyaFan
If you specify your unit and ask specific questions at given points in the setup process you will likely get usefull answers. What machine are you setting up?
Understood, but it still seems like this forum would greatly benefit from a beginners guide to setting up a CRT, as universal as it could possibly be.

Quote:
Originally posted by WanMan
I found this on a 20-second Google search. :) Guy's Astigmatism
It was only a singular example.

Quote:
Originally posted by mking2673
here is a real quick list of things to do [...]
Now this is a good start! This is the beginning of a document. Start with focus, move to this, then do that, etc. Now I can research details for each step along the way and put it into something the total layman can use. As mking said, if anyone has any corrections, additions, opinions, lay them out for the benefit of everyone.
 

·
Registered
Joined
·
5,034 Posts
My process:


1. Point it at the wall move it physically to focus where it was set up last and see what it's set for and how it looks before you muck with it. ( Just as a starting point to know if you introduce a problem of if there's already something wrong.)


2. Move it to the distance you want for the screensize you want. (Most pj's youd want size of image on tubes close to max then set distance for screensize leaving a little adjustment range)

3. zero all convergence, full reset on most machines

4. eletronically focus looking into tubes

5. roughly focus lenes

6. physically align tubes for match in center of screen (toe in)

7. verify if your pj uses lens spacers or adjustment rings they are set right. (not applicaple for machines with scheimflug)

8. physically adjust widtch and height coils or pots or what you have that applies.

9. check that you have all physical and manual adjustments done, then start on convergence. You should have a crudely alighned image at this point. Maybe not watchable by any means but nothing should be so far off it'll tax the convergence too hard.


convergence basic order:

keystone, tilt, bow, skew, linearity, then zone.


Surely others will find I'm missing something or do things in another order.

I didn't spend a lot of time on this, fill in the blanks.


At this point if usually where the beginner has a pretty nice picture. After you have done all the above then you can get fancier and start getting critical about did you get the perfect lens focus, perfect electronic focus, then scheimflug, and touching things up here and there. When the basics are down and you have a grasp of all this, then when or if you want you can get into holy focus, astig and flare, color calibrating, etc. Don't expect perfection in the first day but as you get familiar and understand things it gets easier and better each time you play with it. Don't let it all overwhelm you take things one step at a time and by the time you've learned the pj you should be very impressed with your results.


Troy
 

·
Registered
Joined
·
5,034 Posts
Oh I left out flipping the image if it's upside down.. That's before toe in.


Many pj's have a ton of other convergence settings. From zone focus to contrast modulation to zone stig, etc etc. I think those are better left after you go through the basics a time or two if needed at all..

Also I didn't stress how much easier a square and properly angled pj is, but it really makes a difference. Follow the install manual and a laser level can really help. The better the physical alignment from pj placement to toe-in to angle the better the finaly result and easier the actual convergence is.


Troy
 
1 - 15 of 15 Posts
Status
Not open for further replies.
Top