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

1 Answer

Is this a convergence problem?

I just got this TV from someone and they said it needs the convergence fixed. The screen looks like a sideways hourglass with the 3 different colors in different portions of the screen. When I go to the convergence adjustment in the menu, the crosses are all way off. It will not respond to the commands on the menu and will not let me adjust it or even get out of the convergence menu. I have to wait for the menu to time out to clear. Every other feature on the menu works but the convergence. Can you tell me exactly what I need to do to fix this? Is this something I can do myself or will I need to have it done by a tech? Thanks for your help.

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  • frediggy Aug 14, 2007

    Thanks for the help. I am not sure where these are or what they look like. Do you know of any drawings that I can get that will show me these parts? Also, do you know where I can find these parts?

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This sounds like not only convergence but also bad resistors on the convergence board. There are several resistors in the convergence area, I would change the convergence amps and have the resistors replaced. Look for burnt resistor or just colored differently than the others. check also for loose connections. you can tap on safely converg. board and see if problem changes.

Posted on Aug 13, 2007

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1 Answer

Color and conversion problem with a pinched screen


Bad convergence amp ICs will have picture looking like hourglass in 2 or 3 colors. And narrow width and/or height.

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I just auto convergence my zenith tv and it fixed but still 3-D


Ur tv convergence ICS are dead.That why ur colors lines green,red,and blue are not linning up,and the colors look like 3-D pic.Must have soldering tools,and know soldering to fix convergence problems.Must replaced 2 STK convergence ICS and some or all of it resistors.Tries websites like Tv repair World.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for the parts and labors.

Apr 29, 2010 | Zenith R56W36 56" Rear Projection...

1 Answer

Cant adjust the color on the tv


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

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My Panasonic PT53WX52F has a sideways hourglass picture with the green scroll running in an arc with the same red scroll running straight across. Is this the convergence chip you talk about?


There are two common problems with these sets.

Problem #1) Convergence

Symptoms:
  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Oct 23, 2009 | Panasonic PT-53WX52 53" Rear Projection...

2 Answers

Have you ever had this problem?


Sorry Ginko, but a convergence problem would have the curves down from the top and up from the bottom. The hourglass shape is a pincushion problem. This can be as simple as a bad capacitor in the pincushion circuit.

Could you please confirm the model number so I can look up the probable part?

Thanks,
Dan

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1 Answer

Philips 60PW9363 60 in. Rear Projection Television, red sideways hourglass


You can get the Kit at the following link which contains both ICs and the 12 Convergence resistors plus free instructions on how to do the repair. Its listed under their Convergence repair kit category and its called the DPTV305 - DPTV345 convergence repair kit. Here is the link.
http://servicemanuals.vstore.ca/

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Rca hdtv


Check the Fly Back Transformer. be careful when trying to fix TVs. they retain electric currents even if you have disconnected them.

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2 Answers

Red sideways hourglass


Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
701cb04.jpg
77ea520.jpg
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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

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1 Answer

Zenith 50 In Rear Projection Hour Glass


My picture is a double image and has a sideways hourglass on the screen. Please help me!

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Convergance/bowing


most like tes thats all your going to have to replace + the silicon as if you dont thet wil not last as long as they should. Also you may have blow fuseable resistors next to the ICs make sure you check them as well.

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