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larryk
Joined: 23 Aug 2007
Posts: 106
Location: Edmonton Alberta
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| Posted: Tue Dec 18, 2007 5:03 am Post subject: PG9 xtra, green raster fully lit on startup |
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I have just finished complete dissassembly, cleaning, and all edge cards, contacts, connecters, and ground wires were treated with stabilant 22 before reassembly. The convergence problem that I had is gone and the unit seems to work quite well except that the green tube raster iluminates at startup then goes out leaving a normal picture as long as there is a signal present. Is there anything specific that would cause this? Oh and I only have a couple of screws left over 
thanks
Larry
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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: Tue Dec 18, 2007 5:25 am Post subject: |
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Yes, the color balance is slightly out of whack, but if the pix is fine after warmup, let it be. Don't mess with the internal controls. See other 'how not to repair a projector' thread..
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Tue Dec 18, 2007 5:48 am Post subject: |
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What it means is the "hardware" G2 is slightly high, and the "software" G2 is bringing it back under control.
As Curt says, leave it be, it will be fine.
You will need to save the AKB for each signal (just set the brightness, that'll do it).
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larryk
Joined: 23 Aug 2007
Posts: 106
Location: Edmonton Alberta
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| Posted: Tue Dec 18, 2007 3:00 pm Post subject: |
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OK thanks guys, I will be doing a rough setup here and then take it over to my daugther's place to put in their new theater room. They have been working hard getting it ready, now I have to get a move on if it's going to be in their house bor Christmas.
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deronmoped
Joined: 03 Nov 2006
Posts: 1154
Location: San Diego
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| Posted: Tue Dec 18, 2007 3:59 pm Post subject: |
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I had the same problem. The green would be way too bright on start up, it would stay that way for a few seconds. I ignored it at first, but the amount of time the green stayed too bright got longer, so I replaced the video out board to fix it.
Deron.
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Tue Dec 18, 2007 10:41 pm Post subject: |
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Yours is a 10PG right Deron?
The Video-Out board on a PG contains the Video Output amps. On an Xtra these are on the neckboards. Sounds like you had a bad Video Output amp.
Anyway, I would only try and rectify this if the Green STAYS bright all the time (bad neckboard), or the AKB/Kelvin controls run out of range.
This just sounds like the mech white balance (G2 on steroids) is a little high, and the software white balance (Kelvin)/AKB has enough range to bring it under control.
The software white balance is a fine adjustment on top of a coarse mechanical white balance.
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