Question about Mitsubishi WS-55809 55" Rear Projection Television

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Ws-55809 Convergence chips

Where are the chips located.

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  • medimic Oct 11, 2008

    Our tv has concave images with separated colors. Is this the same problem? The convergence chips? Where do we solder it?

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If you are looking from the back there are 3 circuit boards, the one on the left is green and the other two are tan. The middle on is where the stk's are they are mounted to that big metal heatsink in the middle of the middle board. If you cannot located them email me a picture and I will circle it.

Thanks,
Tim
experttv@comcast.net

Posted on Oct 05, 2008

4 Suggested Answers

  • 20 Answers

SOURCE: Convergence problem, then no power...

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

Thanks!!

Toprol

Posted on Nov 08, 2007

  • 29 Answers

SOURCE: My Mitsubishi ws 55809 wont

if you got spark when changing they are shot if not check 1 oms resistors

Posted on Oct 10, 2009

Testimonial: "exactly what i needed to do."

SD Tech
  • 14553 Answers

SOURCE: please post instuctions for convergence chips for

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Mitsubishi convergence IC replacement: this applies to sets that use (2) STK-392-570

The Idea here is to get the Middle Circuit board out so you can replace the Convergence Ic’s.


HERE is what you will need: (most of this you can buy on the internet or at local electronics stores)

Two new: STK-392-570 CONVERGENCE IC’S
One good soldering iron
Solder
De soldering braid or wick
Liquid flux
Heat sink compound (grease)
Denatured alcohol
One short Philips screwdriver
One small clean toothbrush
One electric screw gun to REMOVE screws

Turn the set on and examine the picture for how the Convergence looks bad---when you are done examine it again---once in a great while you will get and install a new IC that is bad. Remember this when you have finished—if the convergence is still bad but different from what you started with you may have installed a new I.C. that was bad. Turn the Set off.


  1. Unplug set.
  2. Remove back cover.
  3. Remove front speaker grill and inspection plate behind it.
  4. Remove the 2 or 3 black screws that go thru the back edge of the plastic frame that hold the chassis down.
  5. Where all the video and audio jacks are on the right edge of them you will see a diagonal plastic (Black) remove the two brass screws from the outside edge, remove another to the right bottom and a third smaller screw forward and to the left; remove plastic piece and all four screws and set them aside.
  6. Look carefully at main board in center of the set.
  7. You will find a number of screws hold it into the plastic frame.
  8. Towards the left back edge of this (to the right of the plastic you removed) you will find a metal cover with a small screw on either end. It has a lot of round holes punched in it.
  9. Remove both screws and pull the shield up and off---remove the board beneath it by releasing the two tabs on the bottom right side and pulling the board out—handle it with care as it is the digital convergence board that stores the set’s memory of adjustments. Set it aside
  10. At this point you need to pull the entire Chassis back at least a few inches---If it does not slide back look for a plastic latch on either side near the front of it. Some sets have the latches on the left or right side—black plastic tabs that lift up.

Posted on Nov 18, 2009

  • 2 Answers

SOURCE: red convergence on my ws-55809 is off

The lense adjustment won't help. There are two convergience chips inside, each has 16 pins. If you take the big tray, with all the boards, out and turn it over, you will see that one of the chips has a pin that goes to a contact labeled, "RH." You can't miss the chips, they are stuck to a huge, finned heat sink, about 4'' x 7". Check the continuity from that pin to it's contact with an ohm meter. You may get lucky and get by with simply a re-solder or jump on that pin. Those convergience chips are like computer processors, are subject to extreme heat, depend very heavily on their heat sinks and cooling fins and could easily get hot enough to break a solder connection. Like computer processors, they should have been designed with fans as well as heat sinks. Don't kill yourself. Even unplugged, a tv has enough stored energy to be fatal.

Posted on Aug 22, 2010

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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

Color changing while viewing


Sounds like your TV needs new convergence chips.

Go to this web site.

http://www.tvrepairkits.com/xcart/home.php?cat=2653

If you can handle a soldering iron and solder fairly well, then you can do the repair.

Hope this helps.

Apr 03, 2010 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Red convergence on my ws-55809 is off


The lense adjustment won't help. There are two convergience chips inside, each has 16 pins. If you take the big tray, with all the boards, out and turn it over, you will see that one of the chips has a pin that goes to a contact labeled, "RH." You can't miss the chips, they are stuck to a huge, finned heat sink, about 4'' x 7". Check the continuity from that pin to it's contact with an ohm meter. You may get lucky and get by with simply a re-solder or jump on that pin. Those convergience chips are like computer processors, are subject to extreme heat, depend very heavily on their heat sinks and cooling fins and could easily get hot enough to break a solder connection. Like computer processors, they should have been designed with fans as well as heat sinks. Don't kill yourself. Even unplugged, a tv has enough stored energy to be fatal.

Mar 08, 2010 | Mitsubishi WS-55809 55" Rear Projection...

2 Answers

Where are the covergence controls in ws55809 tv located


All convergence adjustments on this set are done with the original remote control--you will find the CONVERGENCE in the customer menu---if set will not adjust there you have a circuit problem.

I have fixed hundreds of these sets--if it will not adjust let me know and I can tell you what is needed to fix it.

SD TECH

Dec 12, 2009 | 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 utilitypigeons@aol.com


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 the 2-2 blinks problem on my ws-55809, can you help?


2,2 is short protection in this model--usually it means one of the two fuses that protect the convergence circuit are blown.

You need to replace the two STK-392-570 convergence chips this set uses along with any of the 3.9 ohm protect resistors in front of them that are bad.

The best way to do this is to get the middle board with the chips out of the set---

I have START TO FINISH, STEP BY STEP INSTRUCTIONS FOR THIS REPAIR ON THIS MODEL--they tell you everything you will need and how to do it yourself.

You can buy a pair of the Chips on Ebay for about 12 dollars plus shipping (I can tell you the seller there to look for--I buy the chips I use there).

If you have the original remote after you replace the chips etc--you adjust the convergence with it.

These are very good sets and were not cheap when new.

If you want the instructions let me know--I cannot post My email here, but you..........

If this information helped you, rate this solution as I do this here for FREE.

SD TECH

Nov 18, 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

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 hometheaterspot.com'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.

Thanks!!

Toprol

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

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