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

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Convergence tried to perfect focus it stops at 22% the red is off not lined up cant find a reset and cant find how to fix focus manually

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  • Anonymous Mar 08, 2008

    I have an HDTV 1080i. It has a double picture and bows in at top and bottom. Have tried to use the remote control on the convergence to no avail. Any advice ?

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Do you have an extended warranty on it?

I would have a shop look at it if you cant get the alignment from the menu.

Posted on Feb 25, 2008

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Hitachi 51-SWX20B Out of focus...tried magic focus and it stops on red. Tried manual focus but red lines won't move. How expensive is this going to be to fix. It is 7 years old and need to know if I...


YOU HAVE A CONVERGENCE PROBLEM. THE RED OUTPUT IS OUT. COMMONLY IT HAS BEEN FOUND TO BE THE DIGITAL CONTROLLER MODULE THET CAUSES THIS BUT THE OUTPUT IC SHOULD BE CHECKED FIRST

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You have a bad sensor, a bad digital convergence board, or the new board is not working correctly. I would start by swaping out the convergence board or exchange it for another one. Good Luck

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Odds are real good that the cooling fluid in the green and blue picture tube assemblies has become contaminated. You can tell by looking down into the lenses with a flash light. Funny thing is the red never gets contaminated because whatever organism is causing the problem can't survive in red light. BTW this may still not solve all of your convergence problems but when the colors are so badly diffused the convergence sensors for flash focus can't lock onto the beam landing.

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1 Answer

Akai


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 projeciton 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 photos of convergence problems.

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Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

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1 Answer

Red will not focus but blue will ...perfect focus stops in middle


REPLACE THE 2 CONVERGE I.C.'S. PLEASE LET ME KNOW IF FIXED. THANKS.

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1 Answer

Thin red line down the middle of screen


Enter muye 1 / 8 /3
it puts you into convergence mode and clears out all bad magic foces data.
then run perfect focus to save new data.

hope this helps
daniel

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The problem you have is the 2 STK - 392 convergence integrated circuits need replacing the cost in the UK is about £150.
SUPER8

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convergence must be adj then saved then magic focus
if cannot be adj chips need to be replaced.

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when you replace the convergence amp board. u usally have to go into setup. or service mode and manualy converge the set. these settings are what perfect focus basis it reconvegence on. sort of the factory settings. these faint lines may also be a red crt overdriving too

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1 Answer

CONVERGENCE


http://www.digitalhome.ca/forum/showthread.php?t=21847

convergence ic bad

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