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kevin_k
Joined: 25 Oct 2007
Posts: 67
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| Posted: Sat Aug 16, 2008 12:44 am Post subject: odd image after scoping on NEC |
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I just finished scoping my xg1352, set the G2's based off of guy's guide and this image shows up. If you look on the blue tube you can see the raster JUST lighting up on the right side of the tube. The image is just on half tubes.
If I remember correctly, this happened after I scoped a xg750 and I adjusted the g2 pots slightly and it corrected this, but I'm trying not to indiscriminately adjust the pots. Am I reading the manuals waveform incorrectly?
I have a spare board and replaced it with that and it's still there.
Thanks
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sat Aug 16, 2008 3:57 am Post subject: |
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The Pedestal level is not set properly.
You need to redo the BLKG pots section of the process, it's near the start.
It's quite tricky to see through the noise on the scope.
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kevin_k
Joined: 25 Oct 2007
Posts: 67
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| Posted: Sat Aug 16, 2008 4:06 am Post subject: |
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I figured it had possibly had something to do with the noise in the signal.
Which pots do you mean by blkg? Do you remember?
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Sat Aug 16, 2008 5:33 am Post subject: |
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The pots used to set the black level to the pedestal are labelled BLKG on the metal grill covering the video out/gain/etc boards.
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kevin_k
Joined: 25 Oct 2007
Posts: 67
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| Posted: Sat Aug 16, 2008 2:07 pm Post subject: |
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OK thanks, I have that cover off the projector right now, but I 'll check it out.
Thanks once again Mark
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