Question about Mitsubishi WS-55819 55" Rear Projection Television

2 Answers

Picture problems and tech question

I am having the familiar bowing effect in my Mitsubishi WS-55819 rear-projection TV. This problem is intermittent and occurs about 40% of the time irrespective of TV movement. In addition, I am also getting multiple colored horizontal lines pulsating across the screen in an erratic type manner, much like veins in a lightning bolt.

1) I have read in this forum that replacing the STK392-570 ICs should fix the convergence problems. I know I also need to either replace or test the resistors. Will this fix the horizontal lines problem I am having as well?
2) When I replace these ICs and test the resistors, is there any danger of high voltage coming across when I remove the ICs and/or resistors? I see no mention of this in other posts. If so, do I need to bleed any caps or tubes?
3) I have read that buying low-quality ICs is a bad idea because of the possibility of a short life. Does anyone have a link to a web-site that sells known reliable ICs for this TV?

Thanks for your suggestions

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2 Answers

Thanks for the useful info. I wlll watch this thread for useful links for the ic's. Another post mentioned only one ic for this model. Most mention two. Does anyone know for sure before I open this baby up?

Posted on Apr 16, 2008

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You already know more that 90% of the "techs" by being informed.
just allow the tv to set unplugged for 24 hrs and all should bleed fine.
to be certain just bleed the big caps , the tubes will not bleed back into the circuit.
just use plenty of flux and wick to remove the solder as fast as you can.
and the issue with ic is that they are all from the same die just that the center ones are mil grade which you will not likely find a source for and the outer are commercial grade which is all you can buy.
being your purchasing a part out of production good luck even finding it. if you have and intermittent issue it is likely a heat and capacitance leakage issue , finding it will be hard,
an air gun and remote temp might just do the issue fastest.
try running with the back off and a fan aimed at the circuits, if it runs longer or forever then it should be easier to locate.

Posted on Apr 13, 2008

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Posted on Jan 02, 2017

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1 Answer

After the set is on for awhile, the picture screen bows really bad and makes you unable to see it. It is a WS-55819 manufactured in November 2001


If picture gets 3d etc, it is convergence problem.

See attached typical photos.

The model indicated uses two of the STK-392-570 chips for this and total parts cost will be under 25 dollars to fix set.

I also have start to finish, step by step instructions for this repair in this model.

If the information or the photos told you something you did not know rate this solution as very helpful as I do this here for free.

SD TECH55f8517.jpg



064ba09.jpg

No two sets with convergence problem will look exactly the same but you will know if you have the same trouble.

Aug 28, 2010 | Mitsubishi WS-55819 55" Rear Projection...

2 Answers

Picture is bowed and colors are not aligned


This called Projection TV convergence. Take a look on this site for a tip on Projection TV convergence.

Apr 19, 2010 | Mitsubishi WS-55819 55" Rear Projection...

2 Answers

I have an mitsubishi medallion hd1080 big screen tv model# ws-55819 getting code 1,2. (hold the menu and input)


Try to unplug set and try it again as if the set was unplugged and then the self check done it will be 1,2 which means NO ERROR detected.

Let me know also what the set does?


SD TECH

Feb 17, 2010 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Mitsubishi TV Picture Bowing


You will find a very good guide here and here to fix your TV.
This might not be a DIY if you do not feel comfortable. The repair shops charge about $350.00 to $400.00 for this type of repair.

Apr 19, 2008 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Bowing at bottom


convergence ic bad, should also replace bad caps in DM
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
caps:
· http://www.chrisandnat.com/Projects/BlinkingTV/blink.htm
· http://www.jeremyburns.com/Mitsubishi-Green-Blinking-Light-Fix.pdf
· http://www.fixya.com/howto/h159332-mitsubishi_dm_board_repair
· http://hdtvoice.com/voice/showthread.php?t=32186
replace DM

Jan 16, 2008 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Mitsubishi WS 55819 with a convergence


CEM-NO, BOTH ICS' WORK ALL 3 CRT YOKES.YOU EITHER NEED TO REALIGN THE RED IN FACTORY CONVERGENCE MODE OR YOU HAVE A RESISTOR THAT HAS FAILED.THE LATTER YOU MAY ACTUALLY BE ABLE TO SEE IF YOU LOOK CLOSELY.OH, ALWAYS DOUBLE CK. YOUR SOLDER CONNCETIONS.GOOD LUCK. JOE TV

Nov 22, 2007 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Mitsubishi ws 55819


Bad convergence ic and should replace caps also

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

caps:
· http://www.chrisandnat.com/Projects/BlinkingTV/blink.htm · http://www.jeremyburns.com/Mitsubishi-Green-Blinking-Light-Fix.pdf
· http://www.fixya.com/howto/h159332-mitsubishi_dm_board_repair
· http://hdtvoice.com/voice/showthread.php?t=32186
replace DM

Nov 10, 2007 | Mitsubishi WS-55819 55" Rear Projection...

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