Question about Philips 51PW9363 51" Rear Projection HDTV-Ready Television

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Bow like picture on the screen

I have a bow like ) on the top and ( on the bottom. how do you adjust this problem or fix it?

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Re: bow like picture on the screen

I have a lg re 39nz43rb tv and have changed the two stk392-120 components and have sound on the tv but I have distortion on the vertical image. can you help?

Posted on Oct 23, 2008

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Re: bow like picture on the screen

Needs the convergence amps replaced. This unit takes two STK392-120 Sanyo amps and no matter what others may say do not try and upgrade these to a larger amp like the 150's or you'll have color purity problems. Stay with the 120's..
A good certified shop can have this one back and running in short order.. When calling around ask what they charge to replace the convergence amps and take the unit to them rather than them pick it up and save the pu/del charge.
Good Luck!

Posted on Nov 19, 2007

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Picture is bowed at the top and bottom of the screen. The "Perfect Focus" option does not work to fix this. Is there a way to manualy adjust the picture

If the perfect focus isnt working its caused by failed convergence. You can get the convergence board from its under the Samsung / Akai circuit boards.

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My 52" RCA P52937SG screen bows on the top and on

What you are describing can be due to a number of different settings.

Focus on the red and green guns
Sharpness on the red and green guns
Horizontal position and size
Vertical position and size.

Please consult a professional for adjustment on these items as they are all near or connect to parts that have Hazardous Voltage.

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Screen is bowed on top and bottom. What could be our problem? Picture, letters & words blurry.

go to hatch screen adjust all colrs to make white color boxes , also adjusts linear lines

Dec 31, 2009 | RCA Projection Televisions

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Bowing of picture at top and bottom towards center.

Projection sets have two very common problems outlined below.

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. The TV can also shut down when the convergence starts to fail.

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, RCA and others.

You can more info and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

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

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*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 using this link on Fixya

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1 Answer

Cheap Fix?

I will strongly advise you to replace the two STK392-120 as a pair. and this will cure your bowing picture problem. You may need to re-converge your set. best of luck.

Nov 05, 2008 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Pt-47wx49e convergence problem

I just replaced the 2 convergance chips, but it did not seem to fix the problem. I then tested all the resistors that feed the convergence chips anf there was a 2.2 ohm fusable blown. IT was R7050 on mine. That seemed to fix it so that I could adjust all the colors through the convergence 2 screen. There seems to be a slight bow near the bottom when you look at the c2 screen, but not noticable when you are watching a picture. Since I got this broken, I am not sure how perfect it should be.

If anyone can send me the service manual, I would appretiate it. Thanks.

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2 Answers

Bad picture

Are the convergence controls also out of adjustment? Please respond to this same post and I will help you. If you could post a picture of what the screen looks like that would even be better.

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2 Answers

Screen is bowed (top and bottom) Color has a green and purple tint?

Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from and do the repair yourself. Its a fairly easy DIY fix.
Here is an example video

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Hitachi 61SDX01B picture...

Sounds like the blue convergence circuit still not working.

Assuming both IC's are good, look for open soldered-in pico fuse.

Once bowing problem is solved,then convergence should adjust ok.     

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