Question about Mitsubishi WS-55511 55" Rear Projection Television

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How to fix the convergence?

I removed the convergence board- replaced the STK393-110 and 2 pico fuses that were bad-checked the convergence resistors- they are good. Put the board back- turn on Tv but after few seconds goes off. Any help is appreciated.

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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  • 668 Answers

SOURCE: Replaced the convergence stk-392-110 and pico 5amp

The Convergence IC's that should have been used are STK392-570's. These are not interchangeable with STK392-110's.
I would try the STK392-570's first before doing anything else.
I hope this helps,
Skyassoc

Posted on Oct 26, 2009

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gregjr_pl1
  • 138 Answers

SOURCE: first problem was, pushed power green light came

Did your check your horizontal output of the crt neat the flyback or high voltage transformer.

Posted on Sep 11, 2011

SD Tech
  • 14553 Answers

SOURCE: Mitsubishi convergence issue

First is consider what the issue is: nothing moves convergence wise or only one color etc.

Also follow if needed the voltages from the pico fuses involved---one will be a negative voltage and the other a positive one--follow them from the diodes for each voltage to the chips---"Got Voltages?"

Posted on Jun 11, 2012

Testimonial: "I did figure out the issue and convergence issue is fixed now. Even though I checked 3 times, I still ended up finding a broken solder joint at one of the connectors on the main board. Thank you for your help. The one problem that I am having now is that I am unable to access all of the adjustment menus. I do have the original remote (set to TV) and I know it works because I can make all of the convergence adjustments using the video, adjust, and audio buttons. I just can't access all of the 0-3-5-5-7 menus."

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1 Answer

Mitsubishi convergence issue


First is consider what the issue is: nothing moves convergence wise or only one color etc.

Also follow if needed the voltages from the pico fuses involved---one will be a negative voltage and the other a positive one--follow them from the diodes for each voltage to the chips---"Got Voltages?"

Jun 11, 2012 | Mitsubishi WT-42313 42" Rear Projection...

1 Answer

Hi there i replaced my hitachi 53uwx10ba convergence IC (2) stk392-120 and now it won't turn on and just flashes at the front panel 7 times, can i get some help pls


Did u check the pico fuse and all those resistors on the tv convergence board to make sure with ones are good resistors which are not good resistors and replace all them resistors too?U didn't do that should get it tested and replaces all those dying resitors.Try website like Tvrepairworld.com look up ur Hitachi tv model what resistors and pico fuse u require to check.

Aug 20, 2011 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

My TV is showing convergence symptoms: the screen looks like 3D effects and as if someone is pusing in the middle of the screen. I've replaced my STK's, 2 pico fuses on the G board, and tested each...


One of two things:
Either:
a) The STK chips you put in are no good (not uncommon)

or

If you weren't careful you may have removed a surface mount resistor accidently while desoldering the orignal STKs. I had a customer do that to me once and figured it out by comparing the board to the schematic for that board location.

Feb 19, 2011 | Sony KP-57WS500 57" Rear Projection...

1 Answer

I've replaced my STK's, 2 pico fuses on the G boards, and tested each convergence resistor along with the pico fuses on the D board--albeit they were still soldered in place. I desoldered two pico fuses...


I believe there is a power board on the left side when looking from the back. It will be vertical, right next to the board you worked on. Take that board out. I believe there are about four pico fuses on that board. One or two of them will be open. Replace the fuses and you should be good to go.

Feb 19, 2011 | Sony KP-57WS500 57" Rear Projection...

2 Answers

I replaced my convergence chips and I still have a convergence problem. Its not as bad but I still cant line up the blue convergence cross exactly


Sounds like your over half way there lol..
You now need to check the resistors positioned near the convergence ic's. They are your likely problem and go bad often when the ic's fail.

They are normally about 2watt and the values will vary but normally are like .10 ohms to 1 ohm.
I cant find a schematic to give you the exact values and locations but if these resistors measure off value at all you need to replace them with the exact value of the originals.

Heres a link to resistor color code guides just in case the value numbers are not printed on the resistors
http://www.dannyg.com/examples/res2/resistor.htm

Good Luck!!!

Nov 24, 2010 | Panasonic PT-53WX42 53" Rear Projection...

1 Answer

Green projection light not alligning with red and blue. Flash focus will not bring them back. Sony Rear Projection KP-48S70


This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html
Note:The convergence/defletion/power board (the one the IC's are on) of this model is on the left hand side (when facing the back of set) also check for blown pico fuses when replacing the convergence IC's The best way to replace the IC's resistors and possibly fuses is to remove the entire board.

Oct 19, 2009 | Sony KP-48S70 48" Rear Projection...

2 Answers

Convergence parts? What are the specific pico fuses and resistors


There are six 3.15 amp picos use 3.5 amp when replacing and there are two 5 amp picos on the G board the resistors if needed are 4.7 ohm 1/2watt

Sep 06, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Convergence issue with kp-57ws500


You have to remove one leg of each pico fuse to test them properly. Same goes for the resistors. Other options is you have a bad soldering joint or a faulty STK chip still.

Jan 31, 2009 | Sony KP-57WS500 57" Rear Projection...

2 Answers

Sony kp-57ws510 convergenece prblem


You didnt replace the STK's? You must replace the convergance IC's or you will continue to have this problem.

Sep 18, 2008 | Sony KP-57WS510 57" Rear Projection HDTV

2 Answers

Pico/ Resistors what are these??


Pico means small and these look like little small resistors, but don't have stripes like resistors, just part numbers. They should measure as a dead short and be in the immediate vicinity of the STK's

Jan 03, 2008 | Samsung HCN5527W 55" Rear Projection...

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