CurtPalme.com Home Theater Forum

joatmon · Joined: 17 Mar 2009 Posts: 127 Location: Ottawa, Ontario

First off, I'm used to a Barco 708/Cine 7 chassis and was given a PG-6100 to play with. I'm having trouble getting the green alignment without reverting to the point controls. From reading the guides here, I'm under the impression I shouldn't be needing the point controls to fix the 'problem' I'm having.

I've drawn an exaggerated example of what the green looks like when I'm trying to align it, and for the life of me, I can't figure out how to dial this out. Without any dynamic alignment adjustments, the red and blue also have the same rough shape.

Any suggestions?

**Curt Palme** · Posted: Wed Jul 31, 2013 3:06 pm Post subject:

Go through every function and set it to 50%. Don't forget the 'ctrl' 'key and pin functions, which get you into the key and pin linearity. Under normal installation conditions, those are going to be very close or at 50%. if one is at an extreme, in your case it seems like top and bottom key/pin lin functions may be at an extreme, you'll never get it.

hold down the 'ctrl' and then press the key or pin and you'll get to those menus.

joatmon · Joined: 17 Mar 2009 Posts: 127 Location: Ottawa, Ontario

Everything was centred to 0 (50%?) when I started, confirmed visually with the PC software where it's easy to see. I have about -75% keystone to get initially squared up to the screen, that's the only really big adjustment. I've gone back to everything fully centred about 4 times now and still seem to end up with the same result.

joatmon · Joined: 17 Mar 2009 Posts: 127 Location: Ottawa, Ontario

When you say 50%.... do you mean centred or do you mean +50%? Just wanted to clarify because the NEC range seems to be -100% to +100%

**Curt Palme** · Posted: Wed Jul 31, 2013 3:31 pm Post subject:

Sorry, centered.

gjaky · Joined: 05 Jun 2010 Posts: 2802 Location: Budapest, Hungary

If the image is still looking strange on the tube with adjustments at midpoint, then check if the convergence plugs (flip up the deflection board to access) are set correctly for the actual projection type, usually this is overlooked by newbie NEC PG owners (know this from first hand Wink

)

joatmon · Joined: 17 Mar 2009 Posts: 127 Location: Ottawa, Ontario

joatmon · Joined: 17 Mar 2009 Posts: 127 Location: Ottawa, Ontario

**Curt Palme** · Posted: Thu Aug 01, 2013 2:41 pm Post subject:

Can you post an actual screen shot of the green grid?

gjaky · Joined: 05 Jun 2010 Posts: 2802 Location: Budapest, Hungary

Red and blue otherwise look normal?

blue_z · Joined: 27 Apr 2006 Posts: 63 Location: So Calif

blue_z · Joined: 27 Apr 2006 Posts: 63 Location: So Calif

**Curt Palme** · Posted: Thu Aug 01, 2013 8:53 pm Post subject:

that's sort of true, blue, but with these sets being over 20 years old, short of changing a messload of caps that undoubtedly have dritted and changed value, using the point board may be the best option here. I just want to make sure there aren't some basic setup issues.

the XG,, specifically the XGLC sets can't be converged without using point. But a good working PG can be decently setup without a point board installed for sure.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Thats true indeed Curt, and with a PG depending on how much of the tube face you use, you need more point to get things right. Not much, but unless you set up too far back, you will need point for perfect geometry ( be f***en close without it, but thats not good enough for me )

Start with phase, angle the tubes, adjust the yokes, then do tilt/skew, bow, keystone, amplitude and linearity, pin cushion. Next youll make minor issues perfect using RGB point, or just green point if thats all thats there. Once you get all that close on red and blue to the green, re check the image is still center of the tube faces, cause linearity moves the edges and causes the image to be off center on red and blue. Re center, re aim, then itll be very easy to adjust keystone, amplitude and linearity from where it was before.

At that point, youll have hardly any electrical correction and itll be mostly perfect, finish it off with red and blue point once youve got as close as you can with all other settings.

joatmon · Joined: 17 Mar 2009 Posts: 127 Location: Ottawa, Ontario

Thank you for all the assistance so far.

With all the electronic controls centered again and the point board removed, I went through the deflection board and checked what I could against the service manual field adjustments (I have an o'scope and frequency generator handy and found the SM using google). The H.OUT circuit isn't happy at the recommended calibration point, but everything else checked out. Unfortunately I didn't note where they were at before, but I mechanically centered the image width/height pots. Next I adjusted the raster with the centering magnets on the tubes (again) and adjusted phase control.

I don't know what the heck I did next, but I managed to get green aligned onto the wall and it is now straight and linear (still a lot of keystone correction though). Huh? Ok, I'll take it but I don't know how I did it. Next I worked on aligning blue onto green and got to a point where I had the center and corners good but the middle of the right side was bowed. Fixed that with bow and tilt and worked the corners again. Well what do you know, I have blue aligned on green and it's awfully damn close. Next did the red and quickly got it onto green. Well I'll be a monkey's uncle, it's as good as I had it the other day with a lot of point adjustment and the point board isn't in the projector! The bottom line is that I think this projector is female because I don't know what I did to piss it off. I think I will reset all the controls a few more times and get more practice with this model. Still have yet to really fiddle with the focus and astig adjustments.

Thanks again.

gjaky · Joined: 05 Jun 2010 Posts: 2802 Location: Budapest, Hungary

My PG xtra is configured as floor front projection and I also have to use about 50% H-keystone, it sounds you're headsing for a good setup Wink

**Curt Palme** · Posted: Sat Aug 03, 2013 2:42 pm Post subject:

From what you were stating, I figured it was operator error. Smile

Don't feel bad, the NEC is a bitch to learn, but once you figure it out, it's as easy as any other set to converge and align. Anyone that's had an NEC has been exactly where you were at.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Well i bloody wasnt!! I read the manual and it has pretty pics of what each item does!!