Question about Akai PTH5498 54" Rear Projection HDTV-Ready Television

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Akai (PTH5498) 54" rear projection TV with red and green ghosting and large curve in the picture at the top and bottom of the screen. Unable to fix using manual convergence. Thinking it must be the convergence chips I have read elsewhere about. Looking for any advice. Thanks, William

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  • fcarr21 May 11, 2010

    Is there anyone that sells the complete convergence board as opposed t replacing components on the existing board?

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Hello:

Yes is is your convergence IC's. One has gone bad, but consider replacing both of them because if one has gone bad then the other is not far behind. They are located on the middle board of your set. They are mounted on a large heatsink, the part # should be STK-392-040. Replace these and your set will work fine again.

Posted on Dec 04, 2009

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THE PICTURE IS GHOSTING AT THE TOP & BOTTOM OF THE SCREEN. THERE


The most likely cause is shorted convergence chips and possibly a few pico fuses.

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,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links 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

You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Dec 28, 2009 | Hitachi 46F500 46" Rear Projection...

2 Answers

Projection HDTV Pansonic 47" Curving blue and green colors on top and bottom of screen.


You will need to replace your two convergence I.C.s.They are two large IC mounted on a large aluminum heat sink.Replace both,look for any burned resistors near them,replace those if needed,and readjust your convergence. Good Luck

Let me know if you need any further help

Mar 29, 2008 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

Curved red image on 46" Akai rear projection TV


Yes! an idea that the flyback transformer is shot!


Please rate our help to keep the free service online

Aug 29, 2009 | Akai PT4298HD Rear Projection Television

1 Answer

Red and blue ghosting,


The most likely cause is shorted convergence chips and possibly a few pico fuses.

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,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links 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

You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Jul 12, 2009 | LG RU-52SZ51D 52" Rear Projection...

1 Answer

Red and green wavy lines


If the distortion that you see can be described as somewhat of a 3-D picture, the problem is teh convergence circuit and this can be fixed easily. Also, if you can solder, you can fix this yourself. If you wish to do this, please update this and I'll provide you with some instructions.

Dan

Sep 12, 2008 | Akai PT5492S 54" Rear Projection...

1 Answer

Green cruve line


Good Day;
Suspect Convergence IC's STK4274, part Number 2003191. Replace all three IK04(red), IK05(green), IK06(blue).
Good Luck, big IRISH.

Aug 30, 2008 | Hitachi 50UX26B/27K 50" Rear Projection...

1 Answer

Red & green lines


Sounds like you have hardware failure in the convergence circuit. Some combination of the IC's, fuses, and/or resistors has failed. Repair cost is $250-$400 parts & labor

Dec 02, 2007 | Akai PTH5498 54" Rear Projection...

1 Answer

Convergence Problem


I'm not a 100% positive this would fix your TV, but I found the convergence board on PartStore.com for about $80. Hope this helps.

Nov 16, 2007 | Akai PT5598HD 55" Rear Projection...

1 Answer

Blue, red and green ghosting, curves in picture


convergance amp ic bad
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Oct 30, 2007 | Mitsubishi VS-45609 TV

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