Question about JVC AV-48WP30 48" Rear Projection Television

Convergence green lines

I have a jvc 48" HD (av-48wp34). There are several wavy green lines across the top of the screen. I understand this is normally bad ICs; I have 2 392-150s on order. I saw no burnt resistors on the board. Is there anything else I need to look at; I would hate to plug it in and blow out new ICs.

atlasbrooks Sep 05, 2007

Sounds good, I will check it out. I have an OHM meter so I can check for correct readings.

I was also told I need to check the voltage going to the convergence board. Does that sound right? If so, what should the voltage be.

Thanks
atlasbrooks Sep 08, 2007

I appreciate your help; Please excuse my ignorance.

It looks like there are 2 candidates on the convergence board for power. The most likely is a 3 pin block that plugs in directly under the power button (I assume that is the power supply board); it has 2 gray wires and an orange on the end. Voltage on both ends is 8.4.

The only other candidate on the conv board is a 10 pin, gray with a black on one end. It has a couple of pins with 34.2v and one with 29.2.

Also I saw 2 plugs on the little board behind the convergence board (with the crossover plugs to main board). I did not check those, as they are not attached to the conv assembly.

Also, the screen looked competely different with out the convergence board plugged in, I assume that means it was doing something,so there had to be power there.

Am I on the right track here? If this is not correct where are the fuses/resistors for the conv power supply located.

Thanks again.

1 Answer

Dewayne Turner

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87 Answers

Closely inspect the board for poor solder connections. Also someitmes the resistors will not show any signs of being bad even though they are open. It is wise to measure them but you need to disconnect the convergence yoke plugs to ge a good reading.

I’m happy to help further over the phone at https://www.6ya.com/expert/dewayne_4a10eab6caecdb92

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Posted on Sep 04, 2007

Dewayne Turner Sep 05, 2007

You should have approximately a +25v source and a -25v source. If one of these is missing you will have a fuse blown.

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