Question about Mitsubishi WS-55805 55" Rear Projection Television

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My bigscreen TV Mithsubishi model WS-55805 just

My bigscreen TV Mitsubishi model WS-55805 just lost the picture but sound still on. Before the picture went out, the picture was warped in the top part then it was squeezed down and finally blacked out. What could be the problem?

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  • hunghue Apr 28, 2010

    Thanks.

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This problems,the 2 STK convergence ICS are dead,u discribe the problem before the picture is gone that great.That how I came to this conclusion.Must know how to solder,have tools relating to soldering to fix this problems.Must replaced 2 STK convergence ICS,and some or all it resistors.Tries websites like Tv repair World.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

Posted on Apr 28, 2010

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First thing I do on these is to disconnect power cord,pull off the front speaker grill and remove the small door covering the tubes. Get a bright light and look for coolant leaking down from the metal shields that cover the high voltage anode on the picture tubes. There is a chamber on each tube that contains ethylene glycol or antifreeze to keep the tubes from overheating. Sometimes the gaskets get a leak and coolant drips down onto the circuit board. Look very closely at the board to see if there are any drips below the tubes. If this is the case you may consider replacing the set but some can be saved by cleaning the board and sealing the leaks. Have a pro look at the tv if this doesn't help because all you can get online is a guess. Second thing that could cause this is a failure in the vertical or convergence circuit that would entail part replacement at a cost of 200-300. If you find no coolant on the circuit board that means the convergence circuit or the vertical circuit needs to be rebuilt. These sets are known for having bad capacitors on the boards that eventually have to be replaced when a failure occurs. Good luck, Russmann.

Posted on Apr 28, 2010

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1 Answer

I have Mitsubishi WS-55805, was watching game this weekend and lost the picture, although volume was still on. Turned unit off and tried to power on again and got absolutley nothing on the picture. Volume...


fghirning,

It more than likely is a partially failed power supply. This model has a known problem with the electrolytic capacitors in the power supply and on the DM board. I have a tip at http://www.fixya.com/support/r7065906-mitsubishi_turn_flashing_power_timer which further explains the problem and where to get a repair kit to fix the problem.

Thanks for using FixYa and for the great rating. Please consider a testimonial. Thank you.

hardrocko

Jan 17, 2011 | Mitsubishi WS-55805 55" Rear Projection...

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WS-55805 55" screen that I've had since 2000. Always worked just fine until today! No picture, just sound.


Check Your Rear Projection Light Open Back Cover it a little Door on the back ov your TV Set Possibilty Light Burn Out ....Cause of this Problem Fan Malfunctioning Or The Bulb as to be change for new one ... Type The Brand and the Model ov your TV According To your Model it will gave you a list ov different Light Projector Make Shure You dont Touch the bulb with your bare Hand when you put it On Because those light produce very hi Temperature and cant burn out immediatly or explode.

Sep 22, 2010 | Mitsubishi WS-55805 55" Rear Projection...

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Mitsubishi WS-55805 CRT projection TV with


This problem is most likely caused by damage in the convergence output amp IC's; this model uses STK392-040. Fairly common for various fuses that protect the DC supplies for these amp IC's to open as well.

Mar 03, 2010 | Televison & Video

1 Answer

I have a WS-55805. Was working great, then suddenly no picture, just audio. When I press the Menu button, I get the menu but I see three separate colors for each menu item. Could this be the lamp, or...


This TV does not have a single lamp but a set of CRT tubes.

If you get menu displayed on wrong clors or colors are not matching then it is either a bad CRT, a bad CRT high voltage power board, or sometimes a problem with convergence board and convergence ICs, however in this last case you usually get no picture and no sound .


You can get service manual from link below:

Mitsubishi - CRT Projection Television - WS-55805 Service Manual

Apr 10, 2009 | Mitsubishi Televison & Video

1 Answer

Suddenly, Sound But No Picture


that is not and easy problem U need experienced tech to take a look at your TV call a local TV shop

Apr 17, 2008 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

Screen goes black


If you are willing, remove the speaker grill and the rectangular board behind that and look very, very carefully underneath each of the three picture tubes for evidence of coolant drops on the printed circuit boards. These sets have been known to spill a few drops of coolant onto the boards and this causes intermittent problems such as yours. This is my first direction in your case. Let me know.

Apr 16, 2008 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

Parts and repair


go to www.ptscorp.com and send the board in

Dec 14, 2007 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

My ws 55805 yr. 2000


check this site first
http://www.chrisandnat.com/Projects/BlinkingTV/blink.htm
if you dont have this in your set then
check convergance amp ic.
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

Oct 24, 2007 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

Blurry Image problem with Mitsubishi WS-55805


Hello, if you want I can supply you with the service manual, please leave your email. Best regards, Arpi

Aug 14, 2007 | Mitsubishi WS-55805 55" Rear Projection...

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