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

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Red and blue lines all over the picture and double people

There are doulble people, red,and blue at the same time . the red line are over to the right of the scream,and the blue lineare swing low, they blank all the time.

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Convergence problem, replace the STK392-040 ICs.

Posted on Aug 22, 2008

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Can this problem be fixed? When I go to convergence the red and blue lines wont come together there are red and blue lines all over the screen.

Posted on Sep 21, 2008

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My rear projection tv has very small red lines running acros the screen in a zig zag pattern from top to bottm how do i fix it

This was posted a long time ago, and by now you've probably dealt with it, but the line you describe sounds like retrace blanking being visible. In any case, this might help someone. As the tubes age, the screen voltage needs to be adjusted, which is simple. Behind the right side speaker grill is a panel that covers the screen and focus adjustments (screens are 3 screws along the top, Focus are 3 below them). From left to right they are for red, green, blue, both top and bottom. With no video input and the PIC control set to PRO (whichwill make brightness, contract, etc at 50%) and in a dark room, in your case, turn the top left screw left and the line should disappear. Then turn it right until the line just appears and left slowly until just after if becomes invisible. Normally you'd do this for all of them, but just do one at a time. That's because when you adjust it, the convergence will need to be adjusted. The right way to do that is to go into the service mode and do it manually. I don't know if the "consumer" flash focus will get you back in line or not, but you could give it shot. If you're not familiar with manual convergence, it's not that it's extremely difficult, but is time consuming. Plus since you'll only have to do the red, you have a shot at it even with minimal experience. Good Luck.

Feb 21, 2011 | Sony Grand WEGA KDP-65XBR2 65" Rear...

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The tv looks 3d and doubles red and blue and greem

Sounds like a convergence failure. Here is my tutorial, let me know if you have other questions
Let me know if I can be of further assistance.

Jun 22, 2010 | Samsung HCL4715W 47" Rear Projection...

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Cant get the Multipoint red/blue set right

Most likely your convergence circuit needs repair, there are 2 large IC chips with heat sinks (labeled STKxxx -XXX) and possibly depending on model a resistor or fuse may have went with it. 95% of the time this is all it is. It could cost $300-400 to have someone repair it.

May 04, 2009 | Projection Televisions

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Sony, tv comes on color fine, then turns red

I had the same problem with my TV, but the hue was blue. I was told that not only did I have to replace the picture tube that wasn't staying on, but I would have to replace them all because they would not mix properly. After much investigation, I found that there is an adjustment for a variable power supply to each tube that can brighten and lighten each tube. I adjusted the RED pot and my picture color issue was resolved! To access this adjustment you must remove the front panel on the TV. At the bottom corners there are two small screw covers that you must remove. Then un-screw the screws under the covers. Then pull the front panel off of the TV, (it hooks under the top near the screen so it will swing out from the bottom). Now remove the wooden panel in the center, (four screws). The pot adjustments are at the bottom of the TV. They are marked for Red, Blue, and Green. They are extremely sensitive, don't turn them much! If you over adjust you will get red, green, or blue lines on your screen. Adjust back down to remove these, (this is also the remedy for removing these lines that can appear over time). Good Luck and God Bless!

Mar 17, 2009 | Sony KP-51HW40 51" Rear Projection...

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51MP392H/17 Blue convergence wont move not IC chip

You could have some opened resistors low ohms that are bad go back and ck them around convergence ics.

Nov 20, 2008 | Akai PT4298HD Rear Projection Television

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Doulble lines

Please check if the lamp is placed correctly on your TV: If the problem still exist click on this link:

Jun 14, 2008 | Samsung HCL4715W 47" Rear Projection...

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Blurry screen KP61hs10

Yes, Convergence settings should be tried first before any color adjustment or any fluid changes are done. Remember that there are 3 colors to notice. Red, Green, Blue. The Green is the only one that you can not move with an adjustment The Red and Blue is ligned up on green. Some cases it does matter how linear the Green color is across the board, just how close you get the blue and red on top of green is what matters.

Mar 25, 2008 | Sony KP-61HS10 61" Rear Projection...

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Hitachi 46in rear pro

You have bad convergene output IC's. There are 2 in the set and we always replace them both because the one that s not bad will likely fail in ashort time causing you to have a 2nd labor bill.

Aug 27, 2007 | Hitachi 46BX01B 46" Rear Projection...

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I had a problem with my TV colors not lining up. One day I turned it on and the green was out of wack. I checked this message board and replaced the STK chips, bad soldering and all led to me just giving up on that and buying a whole new Convergence Board ($185). I just plugged this in and though now my Green lines up okay, my red is out of whack. Is there something I am doing wrong? Can anyone help me? Did i miss a step? Frustrated......Bruce

Jul 29, 2007 | JVC AV-48WP74 48" Rear Projection...

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