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

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Wavy picture with a lot of red, perfect focus states no sensor data

System was built and purchased in 2003. I was working great without warning it started having a wavy picture with an outline in red. I tried different things on the menu the main problem that I noticed is the fact that the perfect focus does not respond and states no senser data.

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Re: Wavy picture with a lot of red, perfect focus states...

Convergence ic's need to be replaced. If you pay over 300 bucks your getting ripped! Good Luck

Posted on Aug 26, 2006

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I purchased a tv repair kit and replaced the convergence ic chips to fix my convergence problem. put everything back together and now, no picture. I tried magic focus and it works great, the colors are...

As per statement, "the magic focus works great, the colors are bright and aligned" it means the tubes are working need feed a signal to see the picture...the tv video goes muted without signal

Dec 29, 2009 | Hitachi 60SDX88B 60" Rear Projection...

1 Answer

"Perfect Focus" problem on Samsung HCN4727W

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

Nov 08, 2007 | Projection Televisions

1 Answer

Screen Out of Focus with Wavy Lines - Perfect Focus Will Not Corr

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

Problem #1) Convergence


  • 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...


Mar 06, 2009 | Samsung HCM4215W 42" Rear Projection...

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Perfect focus reads "no sensor data"

hope this helps check out this above links

please check out this links

for convergence board ics reparing it your self

and for convergence settings


Oct 09, 2008 | Samsung HCM5525W 55" Rear Projection...

1 Answer

Akai PT4298HD projection tv

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

Sep 21, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Samsung HCN653WX has wavy lines and 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

Aug 13, 2008 | Samsung HCN653W 65" Rear Projection...

3 Answers


you need to have both convergence ics replaced STK392-040 (2).resistors 3.9 ohms they will be open.

Jul 27, 2008 | Samsung HCN4727W 47" Rear Projection...

1 Answer

Suspected Convergence Issue on Toshiba 51H83?

Needs chassis pull & convergence IC's replaced....then
Touch Focus will work again..................T.

Nov 19, 2007 | Toshiba 51H83 51" Rear Projection...

3 Answers

Perfect Focus not working

enter your service mode by pressing mute-1-8-3- a cross hatch pattern should apear,when it does and it looks alright press and hold the enter key the ,it will say data write then press the focus key the set will align your sensors and retuen to the cross hatch pattern ,tune off set and turn back on and try the magic focus ,should work.

Sep 13, 2007 | Samsung HCN4226W 42" Rear Projection...

2 Answers


Im trying to install that same board on the same tv how did you do it?

Apr 06, 2007 | Samsung HCL4715W 47" Rear Projection...

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