Question about Panasonic PT-53TW53 53" Rear Projection HDTV-Ready Television

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I've replaced the STK392-110s but Red Vertical convergence is still bowed

I have a convergence problem. The Red colour is several inches up from where it should be, and it is bowed such that it is more severe in the lower center of the screen. I replaced both STK392-110 convergence voltage regulators but... no change. I'd appreciate any suggestions. Someone suggested changing the feeder resistors - anyone got the specs on these?

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  • Anonymous Sep 12, 2007

    One of the resistors was discolored and open-circuit. This is R7013, a 2.2ohm 2W resistor associated with IC7001 (STK392-110). I'm ordering the part. Anyone got a circuit diagram please? It's a Panasonic PT-53TW53G rear-projection TV. Thanks.

  • Anonymous Oct 24, 2007

    I ordered the resistor from Panasonic. Thanks SRTECH for the tip about clipping the legs of the old resistor since unsoldering it might have needed a little too much heat on the board, so it was easier to do it your way. After clipping away the old discolored i.e. burnt out resistor R7013 I soldered the new 2.2ohm onto the old legs. Tip: when reassembling all the connectors onto the board I noticed that for one of them it is possible to plug it onto the board incorrectly. It is the rearmost chunky black connector (it has 4 wires connected to 4 of the 6 positions on the connector). Turned the TV back on and IT WORKS FINE NOW! One slight problem remains - the remote control is cracked and so I can't complete the fine convergence adjustment. Where can I buy a new remote control for this PT-53TW53G ?

  • Bill Apr 09, 2008

    I replaced the STK392-110s also the resistors but the red is still having problem, HELP

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Hi can you please post if you fix the problem? I have the same set and it just picked up this problem today -- must have come from the same production run as yours!

Posted on Sep 13, 2007

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Some are 2.2 ohms/3.9ohms/4.7ohms if you dont have the service manual and your not sure which b+ resistors are gone and from where they get the drive b+,call a tech and have it repaired

Posted on Sep 07, 2007

  • Anonymous Sep 12, 2007

    you already have the location and value to replace it your ok,check the other ones anound it and remember thery use duplicates on both ic;s eg: r7013 2.2 ohm r7014 for the opposite side but the 2.2 2watt seems like its a b+ line feed, clip the legs on the opened one and tack it in from the top of the board and see what happens you should be ok if you already replaced the amps.

  • Anonymous Oct 24, 2007

    call panasonic or sears for a replacement remote don't take a sub if offered you can still get the original one ,you will loose form function and features with a sub.

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Center bow on picture top and bottom with 1" black showing


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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We have a Hitachi 53udx10b tv. Recently it was


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
*Halos around objects
*Red/Orange looking picture

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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This is a very common failure on Projection TV sets. Its called a convergence failure. Here are some common symptoms.
  • Screen looks 3D
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  • Screen is bowed or warped.
The other common problem is cloudy lens fluid. After many years the coolant in the blue and green lens will become cloudy and cause the screen to look dull, red/orange, bright white, etc. You may even see halos around objects on the screen.

You can see some example photos and find a solution here on Fixya.

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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1 Answer

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OK., I know this set very well. It almost never has a convergence problem.

With the set unplugged, remove the back cover--there is a small circuit board mounted ABOVE the main boards--it is about 10 inches wide and 4 inches tall---On the far right side of it are several DIODES---two are much larger then the rest--what usually happens is one of the large diodes is shorted--5 dollar part---the board only has a few plugs and 4 screws that hold it in---easy to remove--check all the diodes(the two large ones first)

If either of the large diodes read like a fuse you FOUND YOUR TROUBLE.

LET me know if you need ANY help or Advice--I am here to help people---I have seen several sets identical to yours with the problem you describe.

Regards, SD TECH

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The problem you're having is due to the failure of the convergence amplifier circuit. In that circuit are some components which amplify or control the signals to the dynamic convergence yokes, which line up the red green and blue images to superimpose them over each other to create a proper colour picture. When you get a failure in that circuit, it no longer aligns the images properly, and generally you get what appears to be badly set geometry in multiple colours. In some cases you will also get a problem with the part of the power supply that supplies the convergence amplifiers, or the digicon, which is the digital convergence control module.

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1 Answer

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hello it's the convergance chips my be the problem get a quote from an engineer its a big job 2 do yourself trust me i've repaired a few my self i hope you get it fixed good luck

shaun

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6b5ee7e.png You may have a convergence problem. Here are some of the most common symptoms.

  • 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.
Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

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


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

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If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Convergence adjustment procedure to many brands of projection TVs are given in detail.

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Typical convergence IC falure. Need to replace both at once as if ones down now, a few months down the road another one will be down. This is not a consumer or end user replacable part. As its all soldered into place and your going to need to do a master convergence alighnment when they bare replaced.

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Has anyone had problems with connecting an 'HDMI to HDMI + SPDIF + RCA L / R Audio Extractor Converter (HDMI input,HDMI+ Audio output)' to a Panasonic PT-53TW53? I have a TiVo Premiere hooked up to my Panasonic PT-53TW53. I use the HDMI out, and RCA R+L outputs on the TiVo, and hook up to the digital in connections on the TV. The conversion of the HDMI out is via an HDMI to DVI cable. This has worked perfectly for years, but recently I wanted to disconnect the TiVo and replace with my Roku or Amazon Fire TV. Both have a single HDMI output. So I purchased an AGPtek HDMI to HDMI + SPDIF + RCA L / R Audio Extractor Converter (HDMI input, HDMI+ Audio output) box, hooking up the HDMI output from the Roku or Fire TV to the input on the extractor/converter, and simply disconnecting the HDMI to DVI and RCA R+L outputs from the TiVo, and plugging them into the outputs on the converter/extractor. The converter/extractor has a 3 position switch: PASS, 2CH audio, or 5.1CH (via and SPDIF or Toslink cable). I have had 2 of these converter/extractors, and with both the Roku and Fire TV I got the same results with both converter/extractors: With the switch on 2CH, which is where I understand I should get HDMI video and 2CH RCA audio, all I get is the RCA audio. No video. If I switch to PASS I get video with no audio. Of course on the 5.1 setting I get nothing, since the TV does not support SPDIF. Yet I see reviews all over Amazon indicating folks are using this converter/extractor for this very purpose, and it is working fine. I can't possibly imagine that it is some sort of incompatibility issue with the TV, since the TiVo has worked (and continues to) fine for years. Any ideas?

Feb 28, 2017 | Panasonic PT-53TW53 53" Rear Projection...

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