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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Wed Feb 19, 2014 4:34 pm Post subject: Vcr lines |
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I just hooked up my JVC HR-S9911U vcr to my Direct tv box. Everything works ok, but when I have the vcr on there is a white horizontal line that floats upwards on the picture. Not real noticeable, but there. It's not there when using just the direct tv box. It shows up when recording to
I'm guessing it's something to do with the vcr tuner ??
Not a big deal, but wondering if some type of filter might be available to get rid of it??
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zaphod
Joined: 16 Jun 2006 Posts: 2002 Location: Cloverdale
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Link Posted: Wed Feb 19, 2014 4:44 pm Post subject: |
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sounds like a "hum bar", which can be caused by a ground loop issue, often with the cable feed to the house being poorly grounded.
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Wed Feb 19, 2014 4:46 pm Post subject: |
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Thanks, I'll check the ground connections
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AnalogRocks Forum Moderator
Joined: 08 Mar 2006 Posts: 26690 Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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Link Posted: Wed Feb 19, 2014 4:49 pm Post subject: |
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Also try plugging your VCR into the same AC outlet as the direct TV box if you haven't already done so.
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Wed Feb 19, 2014 4:52 pm Post subject: |
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Do you have cablevision connected to the VCR? If so, disconnect it and see if the line goes away.
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Wed Feb 19, 2014 7:52 pm Post subject: |
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What is cable vision? All I have connected is the Direct tv box
I'll check that both items are plugged in the same strip.
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Wed Feb 19, 2014 8:23 pm Post subject: |
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OK, same thing. Disconnect all incoming signals to the VCR, so that only the output is connected.
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Thu Feb 20, 2014 12:17 am Post subject: |
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Unhooked the direct tv. Screen is blue set on L 1- Lines show up really well. Moving fast up the screen to.
Can anything be done to get rid of them?
Plugged the sat box & vcr on the same outlet strip. No difference
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AnalogRocks Forum Moderator
Joined: 08 Mar 2006 Posts: 26690 Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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Link Posted: Thu Feb 20, 2014 12:24 am Post subject: |
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I have that issue here if I run a video line from one side of my living room to the other. I got around this by plugging all video and audio equipment into the same side of the AC line. That is. All the outlets come out off the same side of your fuse/breaker panel.
You could cheat and use an extension cord on just the VCR.
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Thu Feb 20, 2014 1:56 am Post subject: |
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I use 2 outlet strips, both are plugged into the same outlet. no difference.
what cause the lines?
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Thu Feb 20, 2014 2:05 am Post subject: |
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It could be a bad VCR? Can you try another one? What happens if you disconnect the audio lines from the VCR, and the only thing you hvae connected is the video output?
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Thu Feb 20, 2014 2:15 am Post subject: |
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Unplugging audio made no difference. Only vcr I have. Everything else on it works great.
It's not that big of deal, mostly see the lines if it's a real dark scene. And even then they are not that noticeable.
I'll live with it.
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Thu Feb 20, 2014 2:21 am Post subject: |
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it is a ground loop as stated above. It doesn't really make sense that it's the only source with an issue if you have nothing else connected to it. If you can beg or borrow another VCR, that would be the next step.
Cheers!
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AnalogRocks Forum Moderator
Joined: 08 Mar 2006 Posts: 26690 Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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Link Posted: Thu Feb 20, 2014 2:32 am Post subject: |
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The lines are caused by a ground loop, I use to get it when I ran my TV cable into a tuner then into my projector. If you have a multi-meter put it across the outside of the coaxial or RCA connection on the VCR and the outside barrel of the satelite co-ax. Set the meter to AC and see what you get. In our old office I had 110 volts from the back of the PC to the TV cable.
http://en.wikipedia.org/wiki/Ground_loop_(electricity)
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macgyver655
Joined: 22 Aug 2007 Posts: 8508
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Link Posted: Thu Feb 20, 2014 2:42 am Post subject: |
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Are the TV and VCR AC plugs 2 prong or 3 and are they polarized?
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Thu Feb 20, 2014 2:43 am Post subject: |
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My Video game, Roku player and dvd player and direct tv picture don't have any line problems. I don't know. If it was real annoying I'd look into it more, but as I say it's not real bad when watching direct tv thru the vcr/recording. I thought I'd ask thinking it might be a easy fix. Adding A Filter or something like that
Curt Palme wrote: | it is a ground loop as stated above. It doesn't really make sense that it's the only source with an issue if you have nothing else connected to it. If you can beg or borrow another VCR, that would be the next step.
Cheers! |
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Thu Feb 20, 2014 2:47 am Post subject: |
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The projector is 3 prong, It's plugged in separately.
The vcr is 2 pronged and plugged into a 3 prong extension strip
macgyver655 wrote: | Are the TV and VCR AC plugs 2 prong or 3 and are they polarized? |
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macgyver655
Joined: 22 Aug 2007 Posts: 8508
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Link Posted: Thu Feb 20, 2014 2:49 am Post subject: |
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larryp wrote: | The projector is 3 prong, It's plugged in separately.
The vcr is 2 pronged and plugged into a 3 prong extension strip
macgyver655 wrote: | Are the TV and VCR AC plugs 2 prong or 3 and are they polarized? |
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Is the VCR plug polarized?
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AnalogRocks Forum Moderator
Joined: 08 Mar 2006 Posts: 26690 Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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Link Posted: Thu Feb 20, 2014 4:02 am Post subject: |
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macgyver655 wrote: | larryp wrote: | The projector is 3 prong, It's plugged in separately.
The vcr is 2 pronged and plugged into a 3 prong extension strip
macgyver655 wrote: | Are the TV and VCR AC plugs 2 prong or 3 and are they polarized? |
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Is the VCR plug polarized? |
One blade of the AC plug wider than the other.
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HD done right!
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larryp
Joined: 24 Jan 2012 Posts: 252 Location: eden prairie mn
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Link Posted: Thu Feb 20, 2014 5:10 am Post subject: |
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yes it is
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