Question about Mitsubishi WS-55807 TV

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Dm board (power supply) for mitsubishi rear projection tv (ws-55807)

When the tv is turned on automatically it would turn back off then a few days later it wouldnt turn on at all. Then we did some research and found out that it was the dm board.

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  • tarl n Jul 23, 2008

    slightly different model but same problem. had service tech come out and he said the high voltage circuit was fried. $450 to fix :-s



  • emw6 Sep 27, 2008

    I have a ws 48 mitsubishi green light blinkin and won'tgo out

    please help"""""""""""

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  • Master
  • 927 Answers

Good day,

mohiuddin;

If the indicator stays on then you may have an DM PCB problem and to correct this do the the folowing:

SYMPTOM: Power LED does not stop blinking after plug in.

CURE: replace C9B01, C9B02,C9B10, and C9B11 (1000 uFD 16V) on the DM PCB. Replace them with part # 181P734030 (680uFd 16V).

The DM Board (PCB) is located on the very left side of the TV looking from back. Caution on removing Board and note what cables you disconnect to access the Metal Shielded Board.
Good Luck, big IRISH.

Posted on Jul 30, 2008

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1 Answer

Find the dm board


If the set constantly blinks (attempts to boot DM up) try something else first---pull front speaker grill off and remove inspection plate behind it--note the bundle of wires coming down from front controls--follow to right and down---unplug the two inline plugs and see if set turns on--remote will still function with plugs undone.

If set works DM is ok and you have a problem on the keyboard--bad reset microswitch.

The DM as seen from the rear is the LARGE metal box on the far left side of the chassis.

It has several numbered plugs and plugs into the board beneath it.

Jun 02, 2012 | Mitsubishi WS-55807 TV

1 Answer

My mitsubishi big screen projection tv, 1080, all of a sudden turned off. When I turn it on, it automatically shuts back off. I did the reset test and it blinks 2 times, blinks 2 times and a pause. How...


you have a bad or leaky capacitor in the power supply section...if you can dismantle the back casing look for the power supply and check if there's a bulgy capacitor mostly electrolytic type....replace w/ same value..it's best if you brought it in a tv service center

Feb 12, 2011 | Mitsubishi WS-55807 TV

1 Answer

Mitsubishi WS 55807 wont turn on


SECONDARY POWER SUPPLY IS OUT

Dec 05, 2009 | Mitsubishi WS-55807 TV

1 Answer

Won't come on


The power board has failed and will need to be repaired or replaced. you can remove this board and, replace individual parts and save a lot of money. You will be inspecting for swollen capacitors and resistors. also, look for discolorations on the board itself.

Feb 19, 2009 | Mitsubishi WS-55807 TV

1 Answer

Mitsubishi WS-55807 turns on but then powers back down after a few seconds


Good Day;

The fuses tell you that circuit has failed and was drawing too much current. No other test is needed.

Good Luck, big Irish.

Sep 04, 2008 | Mitsubishi WS-55807 TV

2 Answers

Mitsubishi WS 55807


Good Day, Girl 1;
Hey, Girl 1, I have four girls not counting my wife . So, helping you may be difficult. Just kidding!
I would highly suspect that you have fluid on your TV's PCB's (printed circuit boards).
So, at this point that you should call an Authorized Service Center and have them give you an estimate before any repairs are performed.
If you want to try repair on your own e me at mmrkcar@yahoo.com.

Thanks you and Good Luck, big IRISH.

Aug 09, 2008 | Mitsubishi WS-55807 TV

3 Answers

Mitsubishi WS-55807 TV won't turn on


It s a Power supply problem.If you are not familiar with electronic repairs take it to an authorized repair shop.
To get a service manual see link
Download Mitsubishi WS-55807, WS-65807, WT-46807, WS-55857, WS-65857, WS-55907, WS-65907, WS-73907 Service Manuallockmanualsdnw_en.gif
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Feb 21, 2008 | Mitsubishi WS-55807 TV

1 Answer

WON'T STAY ON


That is a typical problem in the power supply. It could be a switching regulator that has i think 7 pins, but it gets the power supply up and running with around 157VDC. If that is missing the set won't power up at all. Where are you located. I'm in Louisville Kentucky. Let me know if that works for you. Keep in mind there are quite a few fuses in there too. so check those. I think on that model there is 7 or 9 fuses to check. Talk to you soon. Jay

Jan 14, 2008 | Mitsubishi WS-55807 TV

1 Answer

Tv will turn on


Check the soldered in green 5A micro fuses F9A04 and F9A05 at the rear center of the middle board - If one or both are open, you need to change both convergence IC's part# STK392-570.

Sep 02, 2007 | Mitsubishi WS-55807 TV

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