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

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Blue glow Hello, My tv seems to have a slight blue glow around the edges of images on the screen and borders.Not sure what the red and blue convergence setting option is for and not sure how to set.Can you help?

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  • saucymanatee Nov 27, 2007

    my tv is doing the exact same thing. i havent realy tried anything but adjusting the contrast all the wy to zero and brightness to 30 and about 5 sharpness and it almpst gets rid of all of it/

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Any clue what the value or resistors at RZ147, RZ146 is mine are black

Posted on Feb 07, 2010

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The convergence amps have most likely failed and taken with them the +/- 30v line. Your unit takes two STK392-040 Sanyo built Ics at board location Icz103 and Icz104 and usually one or more pico fuses and some low ohm resistors. F1018 sometimes opens due to stress but generally it's just the two 6.3 amp pico fuses and if they have opened I strongly recommend replacing them with a 6.3 amp slo-blo pico.
The low ohm resistors at RZ147, RZ146 usually show signs of heat stress and may even be burned beyond recognition. Testing at that point is almost unnecessary but will confirm their change in value. Almost always they need to be replaced.
A quality shop will have this unit back on its feet in no time - faster if they have the parts in-stock, which you might ask about when you shop around for a good repair facility.
Have a great day!
Bill

Posted on Dec 03, 2007

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Posted on Jan 02, 2017

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1 Answer

Remove purple haze around edges


The set needs to be focussed and reconverged. The red and blue images combined make a magenta/purple image. Adding green makes it white. Depending on the type of TV, if it's a CRT projection TV then there's an electronic focus control for each of the three tubes as well as the mechanical adjustment of the optical lenses. Given the description, then I'd have a look at the electronic focus first. A sudden shift in focus suggests that something in that circuit has given out. This would cause the red and blue images to go soft enough to create a halo around objects on screen.

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Could you please tell me how to reset my tv? I have a blue screen


What should I do if my TV screen turned black, blue, or gray? print.png Print try this.

Proceed with the troubleshooting steps below only if you're seeing:
  • Black, blue, or gray screen
  • "No Signal" message without the DIRECTV logo
Note: If your TV screen appears "frozen" or you're seeing wavy lines or overlapping images, try this.
Solution 1: Check that your TV is set on the right input
[img border="0" alt="Image" src="https://cdns.directv.com/cms2/global/icons/sm_cl_blu__number1_icon.png">Turn your TV and receiver off and back on.
[img border="0" alt="Image" src="https://cdns.directv.com/cms2/global/icons/sm_cl_blu__number2_icon.png">Using your DIRECTV remote control, press the TV Input button to cycle through TV inputs (Component, HDMI, etc) until you see a picture. If nothing happens when you press the button, try programming your DIRECTV remote to control your TV Input and try again.

Note: You can also try changing the TV Input using your TV remote.
[img border="0" alt="Image" src="http://www.directv.com/cms2/global/icons/sm_cl_blu__number3_icon.png">If you're still having issues, check the cable used to connect your receiver to your TV.
Still not seeing a clear picture?
Continue to Solution 2.

[img border="0" alt="Image" src="https://cdns.directv.com/cms2/support/answer_center/tech_faq_images/img_screen_off_4.jpg">
Solution 2: Reset Your Receiver
[img border="0" alt="Image" src="https://cdns.directv.com/cms2/global/icons/sm_cl_blu__number1_icon.png">On some DIRECTV receivers there is a red reset button located inside the access card door on the front panel. Press it, then wait for your receiver to reboot.

Note: If you cannot locate the red reset button or your receiver does not have one, unplug the receiver's power cord from the electrical outlet, wait 15 seconds, and plug it back in. Then press the Power button on the front panel of your receiver and wait for your receiver to reboot.
could-please-tell-me-reset-tv-blue-i0x50p0fk40mg1d0uyxi2cma-5-0.jpg could-please-tell-me-reset-tv-blue-i0x50p0fk40mg1d0uyxi2cma-5-1.gif

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1 Answer

Sony KP-41T65 41" rear projection tv with convergence issues on part of the screen. And screen is generally slightly blurry. I received this TV already broken (had the red blinking light issue) which I...


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. 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, Zenith, and others. You can get a convergenece repair kit wiith 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 - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV 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 here
bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 03, 2010 | Sony KP-41T65 41" Rear Projection...

1 Answer

Blue red green lines around people images


this is caused by some kind of electrical interference. this can be caused by cd players,speakers, etc being too close to the tube. after you find the culprit and remove or move, unplug tv for about 10 mins, then plug back in

Sep 06, 2009 | RCA F32649 32" TV

1 Answer

Red and Blue color bowing...


Hi, you`ve lost your convergence IC`s, At our shop here in western florida this runs right around $246.00, price will depend on your geographical location and who you call. gl, video-tek

May 29, 2009 | Hitachi 50FX30B 50" Rear Projection...

3 Answers

I have a glow or a shadow around everything I watch...I tried the converse blue but i dont know if i did it right bc it didnt work...how can I fix that?


CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc.

9e7eb5b.jpg

TV set after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again.

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

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1 Answer

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Just to clarify, it sounds like what you are saying is that the image appears to duplicate in either red or blue along the edges of the image (especially white lettering and probably increasing along the boarder of the TV). This is resolved by converging your TV. Convergence will drift normally on large screen projection TV's over time or through moving them. The Hitachi 57f500a has a feature called "Magic Focus" (pg 36 in your manual) which will auto converge the image. If the auto converge feature doesn't work, on page 37 in your manual, it explains how to converge manually. If you do not have the manual, I have the image of the pages below. If for some reason this doesn't work, please provide additional info and detailed prior to rating the help.

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the differnt guns are out of alignment. Your tv has 3 lcd screens, a red, green and blue one what overlay to form the image. Sometimes they move slightly for what ever reason and that causes the rainbow and out of focus picture. Its something that a trained pro should do but is a cheap fix and won't set you back too much

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1 Answer

Bush RFT TV


The picture tube of the tv has 3 color in CRT Red, Green, Blue. The red cathodeof tv set has no function, its either the resistor become higt resistance, that why u need a repairman to replace it.

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