Question about Panasonic PT-56TW53 56" Rear Projection Television

2 Answers

Blue convergence way off

The tv has been fine until we moved. Then one day the blue is way off, and arcing in the corners and edges.No luck adjusting the image, as the blue has multiple instances. I have some experience with electronics and I am not afraid to solder. If there is a kit I could get from www.electronic-repair-kits.com, I would do it, I just don't know what to get. Any help is appreciated Thanks

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  • 4 more comments 
  • toolfish Jun 19, 2008

    I will order the ic's and post the results. Thank you so much for the lightning fast help A+++++ +REPS

  • toolfish Jul 05, 2008

    Ok I got the parts, soldered them in, re-connected everything, plugged it in, turned it on, and it shuts right off. Any Ideas? Solder points look good under magnifying glass(no overlapping contacts) That I could see.Losing faith fast!

  • toolfish Jul 06, 2008

    All plugs look good. Im just wondering if I missed something soldering.The unit turns on but shuts off and the power indicator blinks three times.Would the tv do that if I soldered bad?Or should it still come on?

  • toolfish Jul 06, 2008

    I had to solder it with the board still connected to the BIG FAT red wire. How do I disconnect that wire to get the board where I can do a good solder job? I tried pulling it straight up and it wont budge.BTW thanks for the help!

  • toolfish Jul 06, 2008

    Thanks, I will try that.If the traces are not making contact ie; if when we were de-soldering, some of the main board top "plastic" layer sheet "circle" around one of the contact points peeled up(just an edge), would that affect the trace. Also, one of the solder points has no metal trace around the hole just board material.I guess what I am asking is, is there a way to fix a trace, if that is an issue? Is there a way to tell if all contacts are good B4 putting it back together, besides turning it on? sorry for the long winded-ness.

  • toolfish Jul 06, 2008

    Alright, I have spent way too much time tryin to fix this (says the wife). Where(inexpensive) can I find an entire new board for this. Since I know it like the back of my hand now. Think its a TNP2AH046? Any help is appreciated.P.S. I think the board or another trace is cracked somewhere.

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  • Panasonic Master
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You can get both STK 392-110 convergence Ics at the following link and they provide free instalation instructions with pictures.
http://servicemanuals.vstore.ca/

Posted on Jun 19, 2008

  • 3 more comments 
  • Sonny Berry
    Sonny Berry Jul 05, 2008

    If the solder looks good, double check the wire plugs, especially the white "bridge" Connectors between the two boards on that model, as the steel wires in those bridges can sometimes come out of the groove and get crossed with the other wires in those clips.

  • Sonny Berry
    Sonny Berry Jul 06, 2008

    Yes if it still blinks 3 times there has to be eother a solder short between pins or some of the pins are possibly not making contact with the trace runners.

  • Sonny Berry
    Sonny Berry Jul 06, 2008

    Heres a trick to remove that large red wire. Dont remove it from the flyback itself. remove it from the HV splitter where the other three large red wires are coming out and the one red wire from the flyback plugs in. Here is how you remove it from the HV splitter. First get a pair of pliers, and then put some tape on the jaws so you dont hurt the wire. Then slide the rubber boot up the red wire a little then grab the red wire as close to where it enters the splitter as possible. Now take a large screwdriver and holding the screwdriver shank in your hand use the screwdrivers hanle as a hammer and give the pliers holding the wire a quick firm blow with the screwdriver handle to force the wire out of the splitter, it should pop right out for you.

  • Sonny Berry
    Sonny Berry Jul 06, 2008

    Yes if the trace lifted chances are there is a crack in the trace. use a magnifying glass to check. Often you can flow solder ( if enough room without shorting traces) to repair a crack. And yes if the pad has lifted completely and is gone you can check to see which trace ran to that location and then use a small jumper wire from the pin to the first component on that trace. Its a delicate proceedure to repair the traces, you have to be certain that the traces are shorted with other traces. You can check continuity of the traces with a ohms meter.

  • Sonny Berry
    Sonny Berry Jul 06, 2008

    Those boards are no longer available. Yours can be rebuilt but your talking at least 350 to 400.00 to rebuild your board. You can go to the following link and leave a email inquirering about the cost to rebuild one. Just leave them a email with your model number and what youre needing and they will respond promptly.

    Here is the link.

    http://servicemanuals.vstore.ca/

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1 Answer

The picture arced and looks 3D. Plus the screen


Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV 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 from the link below.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on - TV may also make a chirping noise.
Here are some photos of convergence problems.

49abec3.jpg
f0add3d.jpg


Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution

93a1209.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

May 10, 2010 | Mitsubishi VS-50607 50" Rear Projection...

2 Answers

Philips 43pp92 blue will not converge


STK392-120 is convergence correction amplifier.. the problem is the convergence circuit... try to check the small Valuie electrolytic capacitors or High value resistors! maybe the said parts is in change Value... used a ohmmeter tester to find the chenge value parts!.

Nov 05, 2007 | Philips 43PP9202 43" Rear Projection...

3 Answers

Looks 3d


Do not open anything until you. Go to menu on your remote find convergence and press the volume button to the right go to manual and press right again. you should see a bunch of rectangles, now you should also see a set of red cross heirs press the #2 to move cross heirs up and eight to move down numbers 4 and 6 will move left and right and 5 will place the cross heirs back to the center once you have chosen the selected section to adjust line up the magenta with the other colors using the channel and volume buttons these move the lines up down left to right adjust all lines until they are white. i do not know how to switch from magenta to green or blue but this should get you started on the right track with out having to replace anything. good luck! if you figure out how to switch from maqgent to green or blue please post it so that I may adjust mine as well tahnks

Dec 26, 2008 | JVC AV-65WP74 Rear Projection Television

1 Answer

Blue Convergence out of sync


you need to adjust the convergence. you set up convergence 1 then 2. follow the manual. (Its easy, you just align the + signs so they make one white one (instead of three green, red, blue) sounds like something or someone bumped the tv, causing the blue lens to shift a little.

Nov 23, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Convergence issue


try fixing the convergence 2 after your've aligned the convergence 1 - the second (accessed via the set up control) let's you adjust on 9 different axis to align the red and blue tubes to the green. you select which + sign you want to adust by pressing the corresponding number for the + ie 1 for the top left, and 9 for the lower right corner.

good luck (note - you cant change the green only the red and blue, if the whole edge is a mess try moving the image (you need to be in zoom mode, and then access the position adjustment via the pitcure set up screen.

Nov 05, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Blue convergance off


Good Day, workdoggy200;
More than likely the TV has poor solder connections on the Convergence IC's, and by moving the TV these connections became worse. The original "poor connections" develope from the heating up and down of the Circuit. The IC's may have damaged and would have to replaced. Call an Authorized Service Center to come out and give a written estimate b4 repairing. Good Luck, big IRISH.

Aug 06, 2008 | Philips 60PP9352 60" Rear Projection...

1 Answer

51mp392h Blue Convergence Problem


Hello rogeuryder,

This is the one thing that even make TV repair persons shudder. You don't really have a convergence problem in the normal sense. The convergence works. What you have is a misaligned convergence situation which any documentation and or book on TV repair will tell you that at this point manual convergence adjustment is needed and the only thing you will have to do is keep trying to adjust the convergence until you get the center aligned, and then work towards the outer edges using both static (Center) and dynamic (outer edges) convergence techniques.

As this may sound it is; Very Very Tedious.

Here is something that may help you:

http://books.google.com/books?id=ttBofTJM7FEC&pg=PA112&lpg=PA112&dq=static+convergence&source=web&ots=hyUMeeY9s6&sig=DZm27q1aMbLiwKA__fyysBd2yUE&hl=en&sa=X&oi=book_result&resnum=9&ct=result#PPA112,M1

I have used this book when I use to teach TV repair. I hope you discover what I am tried to convey in my e-mail, this is no longer a question of can you fix a TV? It has become a question of do you have the patience to adjust a TV.

Good fortune in doing this, you will succeed if you just take your time and do static convergence first and then do the dynamic convergence with the manual controls. The procedure will be in the service manual.

I hope this helps

Thank you,

Shuttle83

Jul 25, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Convergence


When this happens it means the convergance Ic's have failed ( STK392-110's) they will need replacing then the cross hairs will move again

Feb 07, 2008 | Panasonic PT-56HX40 56" Rear Projection...

1 Answer

Blue color is out of position


sure sounds like convergance problem
http://www.partstore.com/Part/Samsung/

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
http://www.hdtvoice.com/voice/showthread.php?t=28929

Jan 30, 2008 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

Blue Convergence


Blue convergence IC is bad, but change both as red wont be far behind they are cheap about 10.00 ea at the following link.
http://electronix.com/

Jan 14, 2008 | Toshiba TN55X81 55" Rear Projection...

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