CurtPalme.com Home Theater Forum

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

G70 error 39 appears to suggest too much voltage to one of the crts. In this case, I can clearly see that it's the red crt...but it's not instant. I turn on the projector and withing about 5 or 10 seconds I can see the red becoming too high in voltage, the retrace lines appear and then the set shuts off.

Should I tweak down the G2 or something? That's what it appears to be...too high of a G2 value.

Any other thoughts or suggestions?

It happens with or without anything plugged into the projectors input.

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

it simply looks like the red G2 is too high...how can I lower it?

I thought I had been through enough with this adventure! I just took a week to de-house a PGXtra green and mount it in this G70...and that appears to have went fine as the green tube looks just fine.

I could have bet there would be at least one more hurdle...if not more than one.

Elaine Benes · Joined: 25 Apr 2006 Posts: 1416

For cautions sake, why not carefully remove the neck board and reseat it, checking the pins and such on the tube neck, JUST TO BE SURE there is no damage to that tube too...

I have a red you can have if you need it...

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

I'm thinking I'll need a neck board...but I'll reseat it tonight and see.

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

Paul can now be considered a G70 expert as well...reseated the red neck board, projector runs fine now! Now for a longer term test...

Mark_A_W · Posted: Thu Jan 21, 2010 5:27 am Post subject:

You mean....you actually have a working projector?

Are you going to stick with it for more than a month? Wink

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

I think it needs some G2...and I don't think I can get it because of the software version it's running.

I can easily see the LC advantage though...but the low end is really lacking. Perhaps I will hook up a PC and raise the gamma.

I'm telling you...that 6PG is my favourite projector I've had in a long while...I am going to really look at what I would need to do to get the LC hardware from the G70 into the NEC.

Bradad did it...although he might have used LC housings from an XGLC, but they should be a similar size. I think the LC hardware from a G70 would be even better...the flapping is totally tweakable.

Mark_A_W · Posted: Thu Jan 21, 2010 8:21 am Post subject:

You will need to make a new chassis.

Just fix the damn G70, you are so close.

CIR Engineering · Posted: Thu Jan 21, 2010 3:01 pm Post subject:

cinema mad · Joined: 25 Nov 2009 Posts: 219

Graig I am interested to know When you calibrate A G70 do you leave ABG on or off inc post calibration ?,
As I alway's obtain better results with ABG running all the time inc when performing Gamma/ Grayscale calibration with my low hour G70...

Cheers...

ecrabb · Posted: Thu Jan 21, 2010 4:28 pm Post subject:

I don't know how Craig does it, but I can't run ABG... I had to turn it off to get rid of the obnoxious line.

So, in my case, I ran the machine for an hour with ABG on, watched some material while it warmed up, turned ABG off, then set about calibrating.

SC

CIR Engineering · Posted: Thu Jan 21, 2010 4:50 pm Post subject:

CIR Engineering · Posted: Thu Jan 21, 2010 4:55 pm Post subject:

cinema mad · Joined: 25 Nov 2009 Posts: 219

Thanks for the informed reply Craig & ecrabb...

I run 1920x800 but streched A little larger veticaly to use more Raster than the Correct 2:40:1 Aspect ratio,
the ABG lines on my G70 with image centered on raster is'nt noticeable on the 16:9 screen Running contrast at 65 on A
small 92" Stewart Lux, studio tek130 of course if I look into the Tubes I can see the lines thouugh..

Cheers...

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

as soon as I turn off agb, it goes back to looking horrible again...perhaps I can't have it in serice mode?

At any rate, I don't see the akb line as I run 2.35:1 or thereabouts...It seems that with it on, the G2 is too high...with it off, it's too low. Damn these f'ing things!

CIR Engineering · Posted: Fri Jan 22, 2010 1:28 am Post subject:

ecrabb · Posted: Fri Jan 22, 2010 2:19 am Post subject:

Craig,

On my machine, when I turn ABG off, G2 goes sky high and I get bright blacks. I have to cut bias way back to get blacks back. If I go back to ABG on, then I get über-crushed blacks and have to crank G2 back up. Or, maybe it's the other way around...

Either way, when I switch from ABG one way or the other, I have to re-adjust bias to compensate. Could that be Ben's problem... Ben, have you done anything with bias?

Think there's something wrong with MY machine, Craig? Or, jut a firmware quirk?

SC

Elaine Benes · Joined: 25 Apr 2006 Posts: 1416

**Curt Palme** · Posted: Fri Jan 22, 2010 5:29 am Post subject:

I believe issues with the pix with the ABG off are issues with the tubes aging, which makes sense to me. As the tubes age (differently), tubes end up with different gains, causing the white balance to go haywire. The ABG senses these differing gains, and brings them back in line with each other, resulting in a proper white balance.

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

Curt,

you might be right...the blue and red are fairly low hour and mint tubes...I swapped in an older green, and perhaps that's the culprit.

Anyhow, it looks pretty great with the abg on...I just have to lower the brightness and all of a sudden the pic becomes 3d. The abg line is a non-factor for me as I run 2.20:1 and use black velvet above the screen....overall, a very pleasing picture for sure!

Now...will I get this beast onto the ceiling before the snow is gone? If not...it will not get done!