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

2 Answers

Pth5498 AKAI 54" projection TV

I was having a converge problem with my TV. I order a whole new board and installed it. I then went into the service menu and did a complete 54 point converge, saved it and then turned the TV back on and it worked fine picture looked good. I then read to change the VML to 0 which I did throught the service menu. The I hooked up my DVD player up to video 2, went to play a movie had sound but no picture. I rechecked my cables still no luck. So I went in the service menu again changed the VML back to 2 saved it. Turn TV off then back on still no picture but sound.

My satelite reciever is hooked up to s-video 1 and that worked fine. So then went back into the service menu, did the reset. Now after I did that the tv is in black and white and gray now. Still the same problem when playing the dvd player. Not sure what went wrong, but could use some adivse on how to fix this. Any help would be very much apriciated.

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  • FTTH Dec 16, 2008

    If you could get me the service data that would be great

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

To my knowledge, an Akai PTH5498 is a re-branded Samsung PTH54985S. Your best bet would then be to follow the procedure as outlined in the Service Manual. All others would be suspect as the settings would be "played by ear". Whereas the manual layouts step by step alignment procedures and checklist for faults/malfunctions.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 16, 2008

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  • Master
  • 505 Answers

Some data must have changed when you went into service menu. Changing the VML shouldn't be required with the convergence repair, just the alignment. Was the picture gone before you changed other data? If going into service mode caused the problem, you need to get the service manual and punch back in the default data to get it back to where it was. If the DVD player is hooked up to s-video, check your cable. likely one of pins bent over making you lose your chroma signal. you should have 4 pins like below. You might be able to bend the pin back but a normal composite (yellow rca cable) video cable will look almost as good
pth5498 AKAI 54
pic and more info from
http://en.wikipedia.org/wiki/S-Video

Posted on Dec 16, 2008

  • thielectronick
    thielectronick Dec 16, 2008

    I may be able to find the service data if you did a full reset (ie reset back to zeros, more than back to factory defaults) or just to find which parameter got changed.

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1 Answer

AKAI model PTH5498 turned it on in morning and it worked fine, then went to kitchen then heard a pop then a buzzing noise tv had no picture


Short on the power and deflection boards---with set unplugged take a careful look inside for burnt or blackened parts etc.

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thats board i beleieve iff the unit has fuses on the amp board i beleive they are fb102b and fb101b fusables are you going to replace these.. more than likely if u still have partical convergence it may be a amp or a resistor not the fuse.. have you gone into convergence mode? does the read crosshairs move?

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the part number for the convergence board is aa95-00705a and you can order it at www.vancebaldwin.com. send me your email addy to fixa@markservicepro.com and i will send you a wiring diagram....

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

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


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

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Convergence board is bad


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

Problem #1) Convergence

Symptoms:

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

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

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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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...


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.

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A lot of people on this site have this problem, including me. Usually a problem in the convergence board, requiring fixing (not expensive, really) or replacement (about $80 DIY). In my case it was a coolant leak.

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convergence amps possible have been blown. also check fuses and resistors on that board. it more that likely blown if fuse go. As a tech that happens to me all the time

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TV will not turn on...


Convergence board failure. $300 repair

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contact www.dalbani.com orwww. repairworld.com they might be able to help you.good luck.

Apr 13, 2007 | Akai PTH5498 54" Rear Projection...

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