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

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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.

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  • 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.

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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

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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Jvc av-48wp74 48 in widescreen green projector problem


Projection TV sets have two very common problems listed below.

Problem #1) Convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Jul 27, 2009 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Double picture


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Aug 31, 2008 | JVC AV-48WP74 48" Rear Projection...

6 Answers

Suddenly, the screen shows double images on letters and numbers plus red/greenish like shadows on characters.


Youre convergence Ics need to be replaced. post the model number of your set and I will post the STK number that you need and a link where you can get new replacement ICs

May 25, 2008 | JVC AV-48WP30 48" Rear Projection...

2 Answers

JVC AV-48WP34


The convergence ICs need to be replaced. I can post a link where to get replacement ICs along with free step by step instructions so you can do the repair yourself. Its an easy ,common repair , however a shop will be around 300 to 400

Mar 28, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

JVC AV-48WP34 - Convergence issue, voltage readings?


This is the wrong power pack for this model STK 392 - 110 without using the right powerpack it's called make work day.

Sep 20, 2007 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Bowing red lines at top and bottom of screen


Try this, it might be just the thing:http://www.techlore.com/article/15929/Fixing-My-Own-TV/?textpage=3

Sep 19, 2007 | JVC AV-48WP30 48" Rear Projection...

1 Answer

I have a jvc av48wp30


you have bad convergence circuit.

Aug 19, 2007 | JVC AV-48WP74 48" Rear Projection...

1 Answer

JVC AV-48WP74 48 in.


The convergence circuit needs repaired. I did the same job yesterday on this model. I not only replaced the convergence ICs, but, I had to replace a couple of resistors and a coil. The convergence alignment was minor after that.

Jan 22, 2007 | JVC AV-48WP30 48" Rear Projection...

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