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Decreasing brightness on NEC 6PG (SELECO SDT-200) Pictures !
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Nashou66



Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY

Posted: Tue Dec 02, 2008 10:19 pm    Post subject:
Curt Palme wrote:
NEc made sets for Seleco? Pictures please, that's a new one on me.

I'd suspect a video problem, not a power supply issue.


Cool, Pics prove it now ! Very Happy Now Kal should add this to the cross reference Section.

Athanasios
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kschmit2



Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany

Posted: Wed Dec 03, 2008 8:56 am    Post subject:
yeah, absolutely.

PG6000 clone.
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Choukard



Joined: 05 Apr 2006
Posts: 23
Posted: Wed Dec 10, 2008 10:08 pm    Post subject:
macgyver655 wrote:
Also, if its not that cap it really sounds like its temp related and probably a cap somewhere. I would get a can of cool spray and try hunting around with that after its warmed up and a dim picture.

Is it consistent, where it almost always dims after 15 minutes or so? How long of shut down before pic comes back bright?


I changed a lot of caps on vidéo board. Before, red tube was running but after brightness decreasing, there's no picture, no menu. After changing caps, no red on test pattern, brightness decreasing after few seconds, but menu is always running. If someone have any idea ?

Thanks a lot.
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Tinman



Joined: 09 Mar 2006
Posts: 1326
Location: Carson City Nevada

Posted: Fri Dec 12, 2008 4:28 am    Post subject:
I have seen this twice. Each time replacing the VIDEO board cured it. I still do not know what causes it. I have also replaced bad caps on Video boards with no results. I "think" it has something to do with the DAC chip on the Video board, but never had the time or desire to pursue it.

Marc
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