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Can't adjust red convergence APEX projection TV

 
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Apexblues
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PostPosted: Sat Apr 23, 2005 10:42 pm    Post subject: Can't adjust red convergence APEX projection TV Reply with quote

I'm working on an APEX model GB5108 rear projection television. The red picture is pinched slightly on the left side. I can adjust the convergence on the blue and green guns properly in the service menu. The red gun will adjust horizontally (skew, linearity, amplitude) but will not adjust at all in field skew and field keystone (KRV1, KRV2).

Is this a problem in the convergence circuit, the red gun CRT drive board, or the red gun VM board? I haven't found any visible defects (burnt components).

Thanks.
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mark



Joined: 20 Jan 2005
Posts: 43

PostPosted: Thu May 05, 2005 5:21 am    Post subject: Reply with quote

sounds like convergence.
might have a bad amp there. replace them both.
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Trish
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PostPosted: Thu Dec 29, 2005 5:14 am    Post subject: apex 51in Can't adjust red convergence what's could it be. Reply with quote

I was given a apex 51in projection tv and the only thing wrong is that i can't adjust the red convergence. The blue works fine but when i try to line up the red it doesn't even move what could be wrong.
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jgdas
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PostPosted: Sat Dec 31, 2005 9:57 pm    Post subject: Re: Can't adjust red convergence APEX projection TV Reply with quote

your tv hase a coverage generator check on menu and adjust it
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