Question about Panasonic PT-51HX40 51" Rear Projection Television

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Panasonic pt51hx40b the picture at the bottom about 8 inches up and it goes to the middle of the screen.it is like the convergence is off.it is like 3d you see lite green and pink.the top right hand corner bit not quite as bad only about 4 inches.any help would be appreciated. Thanks Spaceace

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  • Anonymous Nov 03, 2007

    the bottom picture or text were not align and at the upper rigth of the tv is not align too.you think convergence ic is bad too?

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If the bottom 8 inches of the screen is black then you likely have a failed part in the vertical output circuits. If you can still see video clear to the bottom, then your convergence IC's (IC7001 and 7002) may have taken a dump on you. Worst case would be a failure in one or more of the 3 yokes in the set that attach to the CRT's. If the sets less than 10 years old, it may be worth repairing. Otherwise, a nice NEW HDTV would be in order.

Posted on Jan 03, 2007

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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 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
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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

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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

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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/

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