Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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JVC AV-56WP74 self check question

I did an auto convergence, and everything seems to line up but the red is blurry. When I go into the manual convergence the red line is about 4 times the thickness of the others. Any ideas what could cause this?
Comment by mastivee, posted on Feb 11, 2008 I did as suggested and the focus doesn't make the situation go away, it makes it a little better but not good. I ran a self check on the tv and it came back with everything ok witht the exceptions below.

SYNC M: OK S: NG HD: NG
AIO NG 9 YC OK

Any thoughts?

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  • 84 Answers

Each picture tube (red,green,blue) has a magnifying lens assy that sits on top. On each lens assy is a manual focus adjustment with a wing nut that tightens it. The image bounces onto the mirror and shoots it onto the front screen. If you're not a technician then I don't advise you to do this adjustment. You could touch something in the high voltage by accident.

C-Dog

Posted on Feb 12, 2008

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JVC AV-56WP74 56 in. Rear Projection red projector is not showing images and big red line in tv


If the red line looks like a swoosh of red across the screen it may be the convergence Ic having an issue.

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Hello,

Did you lock the adjustment into the TV's memory? This step is the most often missed. Please follow the directions on the Users manual or on the service manual on how to set your memory to hold the configuration.

Find the menu item on setting the convergence adjustment into memory (the menu should have an informational screen on this topic)

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A repair facility will charge 400 to 600.00 for the repair. Or you can repair it yourself if you can solder. As both convergence ICs need to be replaced. They are STK392-110 you can get replacement ICs at the following link with free instalation instructions with pictures so you can do the repair yourself. Heres the link.
http://servicemanuals.vstore.ca/

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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
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