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KennyG
Joined: 10 Feb 2007
Posts: 254
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| Posted: Tue Mar 27, 2007 1:00 am Post subject: House wiring/grounding and noise. |
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I have been having an ongoing problem with my HT room/pj.
When I MUTE the picture the rasters are still lit...at first I thought it was something in my video chain, I swapped pj's, DVD players, changed video cables, even sent my MP-5 in for a check-out, no luck the problem is else where...I can even disconnect the video feed from the pj and the lit rasters are still there.
I finally figured out what I must be seeing is noise coming in on the pj, because sometimes this problem seems to be worse than others.
Looking at my ground wiring in this house, all the grounds are tied with the neutrals on the neutral buss.
Does this seem right??? I would think the grounds and neutrals should be seperate, with the neutrals tied into their buss, and the grounds going to a seperate "house" grounding rod.
What do you think?
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CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
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| Posted: Tue Mar 27, 2007 3:21 am Post subject: |
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I'm not sure if I'm completely missing the point, but in my experience rasters lit up with pic mute on/no source means G2 values set too high.
HTH,
Ben
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KennyG
Joined: 10 Feb 2007
Posts: 254
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| Posted: Tue Mar 27, 2007 5:24 am Post subject: |
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| CRT_Ben wrote: | I'm not sure if I'm completely missing the point, but in my experience rasters lit up with pic mute on/no source means G2 values set too high.
HTH,
Ben |
and believe me, I've checked this over and over again.
XG G2 voltage is correctly set at 2.5 vdc +/- .1 vdc...and all three of mine or right-on at about 2.6vdc
Tonight I have found, that it doesn't seem to be a noise problem.
I have installed a 4 kw Isolation transformer, and lifted the ground to the pj (just for a quick test) the "brightness problem still exists.
I am exploring another idea based on something else I think I'm seeing...when the pj first fires up it seems to be ok, the first time I select the brightness adjustment, everything seems to brighten up...this may have to do with AKB. May need to take this into the crt forum now.
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CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
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| Posted: Tue Mar 27, 2007 11:57 am Post subject: |
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I had figured that you'd checked the G2, but I just wanted to make sure before you were heading off on a wild goose chase 
Best of luck solving your problem!
Ben
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Chuck27
Joined: 09 Mar 2006
Posts: 379
Location: Caledon Township, Ontario
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| Posted: Tue Mar 27, 2007 12:18 pm Post subject: |
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I'm not sure where you are located, KennyG, but in my neck of the woods, the Ontario Electrical Code REQUIRES the neutral and the ground to be connected together within the service panel, and then the panel is grounded to either a grounding rod, or more commonly in urban areas, the water line coming into the house, as long as the connection is on the street side of the meter.
The ground is actually a safety in case the neutral fails.
Chuck
_________________
Chuck
using acreage for sound insulation since 1999
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wallace123456
Joined: 14 Aug 2006
Posts: 2236
Location: Northwest VA area
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| Posted: Tue Mar 27, 2007 2:24 pm Post subject: |
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| Chuck27 wrote: | I'm not sure where you are located, KennyG, but in my neck of the woods, the Ontario Electrical Code REQUIRES the neutral and the ground to be connected together within the service panel, and then the panel is grounded to either a grounding rod, or more commonly in urban areas, the water line coming into the house, as long as the connection is on the street side of the meter.
The ground is actually a safety in case the neutral fails.
Chuck |
Same thing here in the states; neutral and ground MUST be tied together at the panel box.
wallace
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Life Is Good, But BBQ Is Better! BBQ Competition Team
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dbaisey
Joined: 09 Mar 2006
Posts: 821
Location: Southern Cal LA / Seattle WA
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| Posted: Tue Mar 27, 2007 4:09 pm Post subject: |
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Kenny,
Your problem is AKB. When you first hit brightness it turns on AKB. This most likely just needs to be stored then it should be ok. Doug
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KennyG
Joined: 10 Feb 2007
Posts: 254
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| Posted: Tue Mar 27, 2007 11:53 pm Post subject: |
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| dbaisey wrote: | Kenny,
Your problem is AKB. When you first hit brightness it turns on AKB. This most likely just needs to be stored then it should be ok. Doug |
Doug, please meet me over in the crt forum 
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