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asyring
Joined: 03 Oct 2009
Posts: 4
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| Posted: Sat Oct 03, 2009 7:54 pm Post subject: NEC PG9 brightness problem |
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Hi
I've got a problem with my pg9.
I can't change the brightness of the picture.
On which board should I search for the problem. I think it's an STK but which one. How could I test the STKs?
Thanks
Alex
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat Oct 03, 2009 8:05 pm Post subject: |
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It's not an STK chip. Does the contrast work? What input are you using? is the image too bright or too dim? Have you tried turning the AKB on and off in the menu?
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asyring
Joined: 03 Oct 2009
Posts: 4
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| Posted: Sat Oct 03, 2009 8:18 pm Post subject: |
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Hi
It's to dim an from time to time it turns on to normal brightness. I've doesn't checked the contrast and I'm using PC input via RGBHV.
It worked before an from one to the other second the picture was to dark
Alex
P.S. I can't check contracst at moment
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Oct 03, 2009 11:56 pm Post subject: |
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Look into each lens 1 at a time and run the brightness up and down watching the pic and the bar graph. Is the brightness of the pic or bar graph changing on any tubes or nothing on all 3.
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Elaine Benes
Joined: 25 Apr 2006
Posts: 1416
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| Posted: Sun Oct 04, 2009 12:15 am Post subject: |
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Is the TEST switch on the video board in the TEST position ? It shouldn't be...
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asyring
Joined: 03 Oct 2009
Posts: 4
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| Posted: Mon Oct 05, 2009 8:52 am Post subject: |
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Hi
I can't say if its really the brightness. It flickers from time to time and the colors are very bad and pale.
I can change the brightness on all tubes.
Where is the TEST switch on the video board? I've never switched a switch on the board.
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asyring
Joined: 03 Oct 2009
Posts: 4
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| Posted: Thu Oct 08, 2009 8:13 pm Post subject: |
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Hi
So the TEST switch is turned off.
I can change the contrast and the brightness on all tubes.
But it flickers. It flickers also in the test-menu. The flicker is on all tubes the same.
What it could be?
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