Question about Akai PT4298HD Rear Projection Television

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Convergence problem I think I have a convergence problem, also. I have a distorted pic (smile at top and frown at the bottom of the screen) the colors are also bleeding. I replaced the convergence board with no difference. The manual convergence controls wont move at all. I'm trying to avoid a repair shop if possible. Please help

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Check any/all fuses devices in power supply,glass type as well as soldered-in pico fuse type.Beyond that, repair technical help needed.......T.

Posted on Oct 21, 2007

  • Vista Electronics Nov 01, 2007

    With service literature at hand,locate and measure + & -
    voltage to convergence circuit,if not present,troubleshoot
    power supply.........T.

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Top and bottom of TV screen collapsing.


You may have a convergence problem (I will attach some typical photos).

When it does it go into menu and call up convergence grid--if lines skewed and colors mixed it is convergence. This model I think uses two of the STK-392-560 chips and both would have to be replaced if it is your problem.

I can provide more info if you find this is what you have.


5_29_2012_3_45_14_pm.jpg


5_29_2012_3_45_54_pm.jpg


5_29_2012_3_46_22_pm.jpg

May 29, 2012 | Sony KP-57WV700 57" Rear Projection HDTV

1 Answer

The pic is real brightand blue waypoint missed up


These sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks Distorted/3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking screen
  • White looking sceen
  • Halos around objects
  • Red/Orange looking

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

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 01, 2010 | Philips 55PW9363 55" Rear Projection...

1 Answer

Sony rear projection kp-51ws510. color alignment


sounds like bad convergence IC---not uncommon on this set-both convergence IC"s need to be replaced and the set adjusted

Aug 07, 2009 | Televison & Video

1 Answer

I have bright pink and green on tv


this is a typical symptom of convergence. i.e red and blue beams arent not focus.
the convergence ics need to be replaced (check for open resistors), followed by a refocusing

pls rate me!

Mar 21, 2009 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

Sony Model KP-46WT510 46" Projection pic droops-bottom looks like


You probably need to get a Sony TV Convergence repair Kit. More info can be found using the link below.

Convergence Symptoms:
  • Screen Looks Distorted/3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
You can see some examples and find convergence repair kit information here.

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 07, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

PHILIPS 60PW936317 - COLORS GOT DISTORTED AS I WAS WATCHING TV


Your convergence chips and convergence resistors are going bad. When they fail the screen colors will look distorted/3d looking.  Another symptom is one or more colors can't be converged using the convergence menu. You can purchase the parts over the internet. Just make sure you get Sanyo brand convergence chips and the correct flame proof resistors. You can also check the site www.TvRepairKits.com. They are working on a complete kit for this model.

Nov 12, 2008 | Philips 60PP9202 60" Rear Projection...

1 Answer

Sony KP-53XBR35 TV Concave top & Bottom in wide screen, along with color distortion around sides


thats usually a convergence IC failure, Are you able to move the red and blue colors in the convergence adjustment menu?

Jul 14, 2008 | Televison & Video

1 Answer

Convergence problem


The convergence ICs are located on the left board on a huge heatsink they should be STK392-110 or STK392-120. You can get replacement ICs at the following link and they also provide free step by step instructions on how to remove and install the new ICs.
http://servicemanuals.vstore.ca/

Mar 29, 2008 | Philips 60PP9202 60" Rear Projection...

1 Answer

Pic distorted slightly on left side. news (crawl) on bottom of screen angles down on left side, top of pic seems to angle up also. very minor problem but annoying anyway! pic clarity & color excellent.


Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Jan 29, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

60PW9363 60" philips tv


Convergence issue = IC's need to be replaced.....
If you are doing this repair yourself = remove back...locate
large heatsinks with STK392-110 or 120 IC's..let me know.T.

Dec 13, 2007 | Philips 32PW9308 32" TV

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