Question about Akai PT4799HD Rear Projection Television

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Akai pt4299hd Turned set on after 4 days of non-use. Convergence was way off, noticed a slight burning smell, then picture and sound went dead. Set still getting power and will turn on and off. When turning set on now the led power indicator light will blink 5 times then go out. Any idea what the issue is and cost to repair vs. buying new set.

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  • Akai Master
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Replace your STKs big black Ics STK394-250 there is 2 of them thses are your convergence ics.Also ck resistors and pico fuses.

Posted on Dec 22, 2008

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1 Answer

Screen distorted and burning smell


Those dead resistors that the cause,u are smelling burning plastics.Try website Tvrepairworld.com to buy a whole convergence board for the replacement.The Samsung/Akai are using the same convergence board.

Jun 06, 2010 | Akai PT4250A 42" HDTV

1 Answer

No picture. no sound


Bulb may have popped. Cheapest fix, unless your an electrician it the only thing to really try before replacing set.

May 31, 2010 | Sony Grand WEGA KDF-60WF655 60" Rear...

1 Answer

Burning smell and picture is distorted.


Projection sets have two very common problems.

The first common problem is convergence


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,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*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

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

May 19, 2010 | Akai PT4250A 42" HDTV

1 Answer

TV has no picture or sound. Was working fine then suddenly went black. Slight smell or something burning and just a clicking sound inside TV now. Any thoughts?


if it is 46F500 UNPLUG SET and remove back cover--on far right side as you look from the back you should see either two smaller or one very large heat sink with fins--the set listed has either one or two STK-392-110 OR STK-392-150 CONVERGENCE CHIPS.

Near them you will see about 12 resistors--look to see if any are burnt or slightly discolored in the middle---you have to look close at them--they can all be checked like checking a fuse--no reading and one is gone----


Point here is if any are bad or smoked--one of the convergence chips got them----the only other way to prove or disprove this is to get at the chips and un-solder all 18 pins on each chip--if set turns on--one is bad and BOTH NEED to be replaced along with any bad resistors--if you smelled something--something toasted--- these resistors are FLAMEPROOF or metal oxide--they will not catch on fire, just pop and go instantly.

Let me know what you find and I will help you--I am here to help people---If this helps you rate this solution as I do this here for free.

SD TECH

Nov 02, 2009 | Hitachi 46F500 46" Rear Projection...

1 Answer

Red, Green convergence lines are wavy


Projection TV sets have two very common problems listed below.

Problem #1) Convergence


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,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*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

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Sep 16, 2009 | Akai PT4298HD Rear Projection Television

1 Answer

KP-53S65 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

Aug 11, 2008 | Sony KP-53S65 53" Rear Projection...

1 Answer

No Power


Ok, easy !!!.( take it out the box ) Look, in the front part of the box TV ( under convergence panel controls) you will see a little black box, we call high voltages splitter ( 5 red wires go to pictures tubes and screen focus box). Replaced it. Am suggested inspected for possible leak coolant, just for be sure noy leak coolant projection and prevent future problems. I hope this help you, Thank you !!!

Aug 03, 2008 | RCA P52926 52" Rear Projection Television

1 Answer

Convergence


youre convergence ICs need to be replaced there are two of them STK392-040 you can get new replacement ICs and free instructions with pictures at the following link.
http://servicemanuals.vstore.ca/

Jun 05, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Akai PT 4299HD picture shift


Sounds like you got it ! Note for the future....if you change
convergence amp IC's...be sure to use top quality name brand
only....no generics ! I use Panasonic with no re-calls.......T.

Feb 18, 2008 | Akai PT4298HD Rear Projection Television

2 Answers

Akai PT4298HD..Please help!!


Normally, yes.
Make sure you get the CG Board Part number:
BP94-00155A
There are other boards in this set that say convergence, but, they are not the boards you want.
Available at:
Andrewselectronics.com
Easy to replace.
Any questions, reply to this post and I will respond.

Jan 13, 2008 | Akai PT4298HD Rear Projection Television

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