CurtPalme.com Home Theater Forum

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

It is indeed very clear.

The video related boards are in the cage with the big fan on the top at the end of the projector, you should open the cage, and pull out the boards, and examine them looking for bad caps for example.

Jeremy112 · Joined: 28 Sep 2006 Posts: 2649 Location: Fond du Lac, WI

Holy crap... you got really lucky there man, thats quite the score! original boxes, they literally look like new!! my NOS 9PG Xtra doesnt even have that going for it except for the newness factor, no dust inside it either.

00 is quite normal, my XG says that, as does my PGs.

pressing the red, green blue cut off does nothing I assume? test button does nothing? I am sure you probably tried all the remotes with all the projectors....

have you tried using the buttons on the back of the projector to get anything? Have you tried just a plain S video signal or composite signal?

Something stupid has to be going on with those machines.... they are in far too good of condition to suggest they are bad...

nice find man!! Mr. Green

*jealous*

Jeremy112 · Joined: 28 Sep 2006 Posts: 2649 Location: Fond du Lac, WI

If you are going to pull any of the system boards (the ones that are in the metal cage between the tubes)

Give the projector some time after unplugging it, you can damage the system board by pulling it out right after a power down.

ge601 · Joined: 12 Mar 2012 Posts: 30

ge601 · Joined: 12 Mar 2012 Posts: 30

The video boards are under the metal shield, can you circle the screws I need to remove the shield?

I am just try to be extra careful at this point.

http://i43.tinypic.com/w5gjs.jpg

ge601 · Joined: 12 Mar 2012 Posts: 30

How many screw to open the cage (this may seem like dumb question, but many screws seem to have wires or groud attached to them)

Can you circle the ones I need to remove?

http://i43.tinypic.com/w5gjs.jpg

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

If everything is true...

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

ge601 · Joined: 12 Mar 2012 Posts: 30

Those 4 would be my guess too, but thanks for the confirmation.

I got the short board in the way back out now, the 2 taller board seems to have wires pluged in to it, do I need to unplug them when the board is half way out? Do I need to mark the wires so I can put them back correctly?

Thank you so much.

http://i40.tinypic.com/2l8i746.jpg

What am I looking for here? all the solder joints seems to be good, all the capacitor seems to be good too, nothing swollen or leaking.

ge601 · Joined: 12 Mar 2012 Posts: 30

Here are couple more pictures with deflection boards flipped up and metal cover removed.

http://i41.tinypic.com/6rmqma.jpg

http://i39.tinypic.com/u10zm.jpg

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

The two tall boards are the most important the small one on your picture is the video in board, at least we know it accepts video signals as well. The big board with the heatsink is the video out board, the connectors are named and they are one way, so you can simply unplug them.
Anyway you've got PM, you should check it!

ge601 · Joined: 12 Mar 2012 Posts: 30

I opened up the other metal cover. I guess the mystry is kind of solved.

All 3 units are missing one tall board, the board that is closest to the blue tube.

Does anyone know what that is?

I would be happy to trade anyone with one cmplete unit with 2 of those boards.

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

No problem!
That would be the point convergence board, which is standard in PG 9 series, but only an option in 6PG series, it's ok if it is missing, doesn't affect functionality.

ge601 · Joined: 12 Mar 2012 Posts: 30

Thanks for the pm, I really have a tough time getting the other two boards out, the video out board is very heavy and the other one got lots of wire attached to it.

I will try to get them out when I have more time later today, what exactly should I be looking for?

Thanks again and can try to try to turn on the set without putting the cover back (and those groud wires I assume) now that I have re-seated all the boards (pull out and put back in)

Tinman · Posted: Tue Mar 13, 2012 11:15 pm Post subject:

Hi,

Do you get the crackle of high voltage on the tubes when you turn on any of the projectors? If not, probably a bad HV board.
If you DO, I'd go with Curt's suggestion of the Video out board.

It's actually NOT good to have a projector sit un-used for so long. It probably has bad capacitor disease.

Marc

ge601 · Joined: 12 Mar 2012 Posts: 30

First thank you.

I do get the crackle of high voltage on the tubes when you turn on any of the projectors.

Is there any way for me to check for the bad capacitor myself on the video out board?

If I take a picture of it tomorrow, can you put some circle on it for me?

I have done some replacement on bad capacitor myself on other things, I want to give this a shot first before bother Curt with such a small problem.

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

I'm thinking that if these things are so clean and appear to have never been used then they may be factory failures, meaning they did not work right from the factory. Which are even more difficult to trouble shoot. Such as missing components, defective board, missing harness or who knows what. This guy may have came into these from a dealer inventory no longer in business.

**Curt Palme** · Posted: Wed Mar 14, 2012 12:14 am Post subject:

Sorry, we generally don't deal with component troubleshooting here, since that takes away from my business. Smile

THe thing is, it's good that you hear the HV crackle up, but it may also quickly shut down, and you don't normally hear that.

Also, it may be your camera, but those filaments look pretty bright. The NECs are not known for filament voltage that's too high, which nukes the tubes. A run of MArquee sets did that due to a design failure, so I don't think that's it either.

ge601 · Joined: 12 Mar 2012 Posts: 30

Those come from a usda office, on the boxes, it also showes the selling dealer info too.

2 of them have serial number next to each other, the 3 one is only different in last digit.

Which made me believe they are all sold at the same time.

I believe of them are never used, only out of box to have a asset tag put on, the third could be used, but not very much.

All 3 units inside are super clean, judge from the condition of the cooling fan, I would say they are all not used at all.

I have taken the lens off all units to look, the tube face is almost brand new (but this is the first time I see a crt tube), I can post a picture of it tomorrow.

From I read, nec are reliable machines, the fact all 3 of them died with so little use if kind of odd.

This is as much background on those machines as I know or guessing.

How that helps in trouble shooting.

ge601 · Joined: 12 Mar 2012 Posts: 30

I understand you are in business of fixing broken projectors.

I can hear the HV crackle up only the top cover is open, it does not shut down by itself, but I may not let the projector run long enough.

Filaments are not as bright in person, they barely glow red, kind of like old tube audio equipment. The room they are in is kind of very dark, so the pictures are take with shutter open for long time (more than 1 sec, maybe like 2 or 3 seconds). So it does glow more in picture. I did not want to use a flash, it will be hard to see the glow that way.

Last I would be happy to send you boards to trouble shoot my problem, but that is only after I am sure it is not something I did wrong (or stupid) myself. (maybe a step is very obvious to all folks here, but not to a newbie like me)