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

2 Answers

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?

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: I've replaced the STK392-110s but Red Vertical...

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

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert that has over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 375 Answers
Re: I've replaced the STK392-110s but Red Vertical...

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

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Sony model #kp51ws500. Common problems for screen appearing warped

Need more details about how the screen is appearing warped.

if you have color separation and distorted image (warped,bowed, etc), then your Convergence ICs have failed. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.

Note if one STK chip fails, you replace both regardless.

Note: The STK chips are black about 3 inches long and will be mounted against a large aluminum heat sink (metal fins). They have about 20 pins on them. I believe they are STK392-560s in that set.

Feb 25, 2011 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Toshiba 65hdx82 convergence issues

check fuse resistors near STK, and broken PCB around digital convergence board (board in a metal box verticaly mount beside STK.

Apr 23, 2010 | Toshiba 65HDX82 65" Rear Projection...

1 Answer

Wont autofocus, bow in blue color at top, cant adjust blue convergence

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


May 21, 2009 | Samsung Projection Televisions

1 Answer

Colours split and vertical bowed green line at to and bottom of s

This is a convergence problem that can be either poor solder connections at the convergence ICs or defective ICs. If you can solder and feel comfortable working inside the set where there are potentially dangerous high voltages, update this and further details and instructions will be provided.


Dec 12, 2008 | Samsung HLN5065W 50" Rear Projection...

1 Answer

Red convergance

You will need to replace both convergence ICs they are STK392-110 and you will also need four 6.8 ohm 1watt resistor. You can get replacement ICs and resistors at the following link with free installation instructions.

Sep 21, 2008 | Philips 43P8341 43" Rear Projection...

1 Answer

50P8341 red bows

Convergence ICs or the resistors powering them are bad. Check for open resistors near the ICs if any are open, change both ICs and the resistors.

Feb 10, 2008 | Philips 50P8341 50" Rear Projection...

1 Answer

Tv troubleshoot for me

chances are that IC804 has failed. You have two ICs that allow you to converge the three colors. IC804 is used for Red Horizontal and Vertical Convergence and also for Green Vertical Convergence. IC805 is used for Blue Horizontal and Vertical Convergence and also for Green Horizontal Convergence. These ICs run very hot and have a very high failure rate which sometimes will cause damage to resistors in their associated circuits. They are both STK-110 and it's best to replace them both at the same time. It's also a good idea to upgrade them to either STK-150 or STK-180. These will run a lot cooler than the STK-110.

Before replacement do inspect for any open or overheated resistors as I stated earlier. Being you only have problems with Red Convergence the plus and minus power supplies should be okay since they are common to both ICs.

Try They have the Hitachi CZ00433 (STK392-150) in stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very good results replacing STK392-110s with these chips. Do check for open or overheated resistors before replacing these chips

Dec 29, 2007 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Phillips 60 inch HD rear projection? Convergence!

Dec 26, 2007 | Panasonic PT-53WX53 53" Rear Projection...

Not finding what you are looking for?
Panasonic PT-53TW53 53" Rear Projection HDTV-Ready Television Logo

Related Topics:

342 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

Josh Whitehead
Josh Whitehead

Level 3 Expert

1142 Answers

The Knight
The Knight

Level 3 Expert

66499 Answers

Are you a Panasonic Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides