Question about Akai PT5598HD 55" Rear Projection HDTV-Ready Television

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Convergence Problem I have read multiple entries for the convergence board (IC's STK392-040's) failures on AKAI (Samsung made) projection TV's. I have the bowed top portion on my screen and ghost imaging on all input signals. I am having similar problems, but it seems that my green siginal is what has gone bad, as it is actually curved on the manual screen convergence setting screen. I can move and adjust the Red and Blue CRT's in the manual convergence selection. The text (instructions for controls) that come up in the middle and bottom of the screen when in manual convergence are somewhat readable. When Auto fucus is attempted only the green signal is attempted and then tv goes back to normal mode without completing the auto focus. Would/is the convergence board/STK392-040's also tied into the green CRT signal and causing this? I am only seeing two STK392-040's at this time as there a 3rd one on a seperate board for one of the signals? Just would like to make sure I am heading in the right direction prior to buying the board or the IC's (STK392-040's).

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Re: Convergence Problem

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

Posted on Nov 16, 2007

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The tv vision is red, green, yellow, orange, very very blurry, and it is not possible to watch the television. How could I fix it?

Please do us a favor and rate this solution after reading.

Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

  • 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.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya

Common 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.

TV set after fluid change



You can see some more examples and find a fix using this link on Fixya

Please do us a favor and rate this solution after reading

May 15, 2011 | Akai PT5492S 54" Rear Projection...

1 Answer

We have 52 inche akai and it shows double inmage

This problems is known as a convergnce problems,it dead.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergnce board,must be replaced to solved the tv covergence board.To solved the tv picture convergence problems.Try website like to buy a whole rebuild convergence board to replaced.The Akai/Samsung tv used the same convergence board.

Sep 15, 2010 | Akai PT5492S 54" Rear Projection...

2 Answers

AKAI rear projection TV won't turn on

possiblity convergence needed...
main power board malfunctioning
contact akai service center

Apr 26, 2010 | Akai PT4298HD Rear Projection Television

1 Answer

I can not adjust the convergance with the remote or TV buttons

Ur convergence is dead.Must change the convergence board.Buy the whole refurbish convergence at Tv repair for the replacement.The Samsung/Akai use the same convergence boards.

Mar 23, 2010 | Samsung PCJ522R 52" Rear Projection...

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I have an akai 50 inch tv. I have a darker area on the left side of the screen about 3 inches wide. I replaced the bulb but the problem is still there. Any idea how to fix it. Its a projection tv.

Convergence is dead.Replaced the 2 convergence ICS,should solved this problems.Try website Tv repair to buy a Whole convergence board to replaced.Samsung/Akai use the same convergence board.

Feb 26, 2010 | Akai PT4298HD Rear Projection Television

1 Answer

Where seeing 4 people on the tv and colors are pink.what would that be

Convergence is dead.U can buy a whole convergence board to replaced.Try Website Tv repair to buy the AKAI convergence board.The Samsung/Akai use the same convergence board.

Feb 24, 2010 | Akai PT4799HD Rear Projection Television

1 Answer

My Akai TV Model number PT5598HD shows two of everything, how do I fix this?

U can't.Ur convergence is dead.Try website Tv repair to buy a Convergence board to replaced.Well solved the convergence problems.The Samsung/Akai use the same convergence board.

Feb 15, 2010 | Akai PT5598HD 55" Rear Projection...

1 Answer

Red and blue pic adjustments areso out of adjustment how can i get them back

Convergence board is dead.Go to Tv repair buy a new convergence board replaced the board will solved ur problems.Samsung/Akai use same convergence board.

Jan 22, 2010 | Akai PTH5498 54" Rear Projection...

2 Answers

Convergence board is bad

This is a common problem. Its called a convergence failure.

Problem #1) Convergence


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted

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

Dec 28, 2009 | Akai PTH5498 54" Rear Projection...

1 Answer

Akai 42in rear projection TV convergence problem

its the problem of ic on the main board..ic needs to be replaced.not much expensive.

Dec 24, 2008 | Akai PT4298HD Rear Projection Television

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