Question about Mitsubishi WS-55809 55" Rear Projection Television

1 Answer

Mitsubishi WS-55809 installing STK392-570

I have a Mitsubishi WS-55809 and I have convergence issues. I found the part I need is an IC chip STK392-570 but I don't know how to install it. I have zero experience with doing this but I am a pretty technical guy so a quick how-to would be awesome. I don't have to money to pay somebody to replace it and I am getting headaches from watching the tv. Please help!!

Posted by on

  • cbolitho Dec 10, 2008

    Ok, I have soldered a few things before and it doesn't really seem all that difficult. To unsolder I need a solder braid to head up the old solder and so it attaches itself to the copper of the braid, remove the IC's and replace with new ones and re-solder back on. You mentioned to check the low ohm resisters in same circuit, how would I go about doing that? I don't have a voltometer or anything like that.

  • executivebui Jan 10, 2009

    Hello, I have Mitsubishi WS-55809 installing STK392-570 problem. I can do the solder no problem. However when removing the circut board, how do I know when it is safe ( no electricity in capacitors or transformers) to proceed.? I do not have a degauss tool. I have a cheap multimeter, but where do I test? Or how long after unplug would be absolutely safe? Thanks



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Mitsubishi Master
  • 5,138 Answers

Un solder ics replace both of them resolder make sure you do not solder any of the circuits together or it will short something out,also ck low ohm resistors in same circuit.I will try to help you the best that i can. Main key you must know how to Solder.

Posted on Dec 10, 2008

  • ladywinn
    ladywinn Dec 10, 2008

    you will need to get some heat sink silicon to put onto back of new ics, also just look to see if any of the resistors seem burted. volt/ohm meter do you know anyone that has one/or you can buy one for less then 25.00 they really do come in need for alot of things .resistor values 1.8 ohms 1watt look up color code for resistor values print it .Radio shack use to have a free resistor chart at thier store.If i can be of anymore help just let me know.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Mitsubishi WS-55809

Most shops will have that chip which is not used in many mitsubishi models----try suburban electronics on the internet----they have all the chips etc and you are looking at 2-3 days for average delivery to California----I know.

Oct 30, 2012 | Sanyo Original STK392-150 Convergence IC...

1 Answer

Ws 55809 color

So you are still haveing the convergence issue with your tv, the convergence ic chips need to be replaced to correct this problem you can't adjust it as the components are failing.

Aug 19, 2008 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Just changed the convergence chips and now the TV turns right back off

There is a short. Be sure none of the leads on the ic are shorted together.

Jan 01, 2010 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

I need to replace the convergence chips in my Mitsubishi WS-55809. Could someone send me the instructions to do so, as well as any other need info for this task? Thanks, Jason

There should be a diagram somewehre in the tv set itself. If not, do a diagram search on your model number on your television, and it should show where those chips are.

Nov 23, 2009 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

I have a Mitsubishi ws 55909 and all of a sudden the convergence will not line up. The red lines have a wave pattern that will not reset. Any ideas?

You will need to replace the convergence amplifer chips and any related blown resistors, and perhaps two fuses.
Search this site for convergence fixes.

Sep 08, 2009 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

My mitsubishi ws-55809 will not turn on

The problem is the Convergence circuit and the reason it does not power up is that one or two of the 5a pico fuses have opened when the Convergence IC failed. It is either going to be a pair of STK392-570's or a single IC STK393-110. That is as long as this set is a Mitsubishi made in the last 7 to 9 years.
I would estimate the cost to repair 280.00 plus service call fee if any, plus tax on parts.
Let the Tech check it out. If if it cost less than 400.00 to repair, it may well be worth taking the chance.

thank u
rate me

Jul 21, 2009 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

55809 convergence


Mar 16, 2009 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Convergence problems

If you know how to solider you can fix this yourself with no new parts.

The convergence chip is becoming desoldered from the board. If you check's Mits forum they have very detailed info on how to fix this.

Dec 16, 2007 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Convergence problem, then no power...

Hi! Truman001;
Check all the peco fuses on the deflection /power pcb.
Please let me know what you find.



Oct 15, 2007 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Mitsubishi WS55809 "red" converge problem

Proper description is convergence IC ...part # STK392-570...
there are two in model # WS 55809...replace both.......T.

Jul 30, 2007 | Mitsubishi WS-55809 55" Rear Projection...

Not finding what you are looking for?
Mitsubishi WS-55809 55" Rear Projection Television Logo

Related Topics:

371 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Televison & Video Experts

matt martin
matt martin

Level 3 Expert

1229 Answers

The Knight
The Knight

Level 3 Expert

75417 Answers

Jaime Hernandez

Level 3 Expert

2336 Answers

Are you a Mitsubishi Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides