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JVC Rear Projection TV Alignment
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rf78801



Joined: 19 Jul 2008
Posts: 7

PostPosted: Mon Aug 11, 2008 9:00 pm    Post subject: JVC Rear Projection TV Alignment Reply with quote

JVC HV53 PRO

Seeming identical problem jkeisert described previously. As suggested by minnie, I've replaced the Convergence ICs (both). Unfortunately, it had no effect.

Am stationed overseas, no reliable electronic mx around here...anyone have any other ideas regarding this problem? Can send pics if it will help.

Thanks much.
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Mon Aug 11, 2008 11:05 pm    Post subject: Reply with quote

http://www.eserviceinfo.com/downloadsm/7280/JVC_HV-53PRO.html


If the ic's didn't fix it you need to check the bias resisters and power supply.
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rf78801



Joined: 19 Jul 2008
Posts: 7

PostPosted: Wed Aug 13, 2008 11:37 am    Post subject: Reply with quote

Minnie - afraid I'm not that knowledgable about which/where those might be. Have studied the schematic but it's not obvious to me. If I opted for board-level swapout, which one would you recommend I start with?

Thanks again.
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minnie



Joined: 18 Aug 2005
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PostPosted: Wed Aug 13, 2008 6:00 pm    Post subject: Reply with quote

The board with the convergence IC's on it.
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rf78801



Joined: 19 Jul 2008
Posts: 7

PostPosted: Thu Aug 14, 2008 4:31 pm    Post subject: Reply with quote

Okay, thanks very much. Is the power supply you mentioned also on that board?
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minnie



Joined: 18 Aug 2005
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PostPosted: Thu Aug 14, 2008 10:55 pm    Post subject: Reply with quote

I'd have to see the service manual. If you have it, email it to me.
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rf78801



Joined: 19 Jul 2008
Posts: 7

PostPosted: Tue Aug 19, 2008 6:01 pm    Post subject: Reply with quote

Hi Minnie. Sorry, all I have is the owners manual. Would it help if I emailed you a picture of the board?

Really appreciate your assistance, few options here.
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minnie



Joined: 18 Aug 2005
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PostPosted: Tue Aug 19, 2008 8:13 pm    Post subject: Reply with quote

Look on the board. JVC usually puts the pert #'s on the board.
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rf78801



Joined: 19 Jul 2008
Posts: 7

PostPosted: Fri Aug 22, 2008 5:23 pm    Post subject: Reply with quote

Will look for those part #s. How many bias resistors are there?

Also, ref this posting: www.pechorin.com/m/2006/05/06/JVC_HV53PRO-261008.html, describes a similar problem. Have you ever heard of these projection tubes needing fluid? How would one check to see if they are fully filled? I don't think that's the problem though as I've noticed that the tubes (all three) flicker irregularly every second or two. Problem affects all 3 tubes so I suspect it must be power related. Sound reasonable?
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minnie



Joined: 18 Aug 2005
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PostPosted: Fri Aug 22, 2008 6:27 pm    Post subject: Reply with quote

Link is bad but, if they were low on fluid, the whole inside of the TV would be wet. There should be 6 resisters. R/G/B vertical, R/G/B horizontal. Usualy around 1/3.3 ohm.
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