CurtPalme.com Home Theater Forum

[dyates69]

I have a friend with a 1209s with a problem that looks very similar to one I had with my old 808.

There is a glow in the red tube (was green on mine) and what looks to be a very noisy raster. The glow goes beyond the raster though. Increasing the G2 brightens the glow, but decreasing it only reduces it to a point and then doesn't reduce any further.

When turning the projector off a red circular spot forms momentarily on the tube face.

When I had this issue it was originally diagnosed as a spot suppression or spot kill problem. The tech that gave that diagnosis charged me $800 and did nothing else but switch it on and off enough to burn a nice spot in the centre of my tube. When I got it home I played with the G2 to try and reduce the glow but accidentally turned it up too high instead. There was a loud cracking noise and the glow went away and the video noise was also gone and all was well again except for the spot burn. I used this tube for another several years without issue.

After doing this I vaguely remembered and old post either on AVS or TAW that stated that cranking up the G2 was a good way to burn impurities out of a tube that had been left sitting idle for too long. Although I could never seem to find that thread again.

Does anyone here know if this is a semi safe way of trying to eliminate possible impurities from a tube? My friend is hesitant to try it and I'm hesitant to strongly recommend it just incase my case was more lucky than normal.

[jkruger]

The best way to clean it is with a Sencore. I cured the same problem on my 1209s with a wooden dowel. Lightly tapping on the tube neck knocked the crud off.

[Ile]

Remove unused blocks from service menu and then use crt run in cycles few hours. That feature is build for this purpose.

[Nashou66]

I jsut put the tube in a slightly knocked the neck with a piece of broom handle with rubber tape on it, it knoks the crud off and it sparks and crakles inside the neck, it looks like the Aurora Borealis

Athanasios

[stefuel]

Well if it's a Barco all you need is the Gary M projector adjusting tool
PS It's also effective on modded Marquees

[Nashou66]

And every Ampro out there.

Nashou

PS these Forum Down time issues suck I think we need to use the GM adjustment tool on our servers!!

[dyates69]

[Ile]

[AusJedi]

This is the same machine with the drift issue (again on red) on this thread.

[Mark_A_W]

Have you swapped neckboards?

(Paul...have you got, or can you get, a set of old tubes?)