Question about Mitsubishi WS-55807 TV

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I have a 2001 Mitsubishi HD 1080 series TV, model number 55807. While watching TV last night it suddenly turned off and will not turn back on. I have no lights that come on at all. I remove the back panel and check the fuse in the fuse is still good. Can anyone help?

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Posted on Jan 02, 2017

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SOURCE: Mitsubishi model No. WS-55807 - In need of schematic please

I have a WS-55807 that will not power up. When the power button is pressed I hear a click from the back of the set, the timer light comes on and 3 seconds later I hear a click from the back of the set, and the timer light goes off. I started checking power to the unit with a voltmeter. For those intersted I have attached scematics: I verified that the PCB main fuse is good and there is 120V at point PT. 9f453c1.jpg
From what I can tell is happening, the power button is pressed and the P-ON transistor is given a signal to conduct which causes K9A50 to close. K9A50 opens after about 3 seconds.

I am looking for other troubleshootinng steps. I have checked fuses F9A01 and F9A06, both are good. What are some other things to check for? Where does the P-ON signal come from?

In the switched supplies regulator circuitry I found fuses F9A04 and F9A05 blown (denoted by red lines thru components). I jumpered around F9A04 and F9A05 with good 5A fuses and the TV powered on. However when the set was plugged into an outlet there was a huge power draw (sparks from the outlet).
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After jumpering around the blown fuses, the TV stayed powered on for about 30 sec and then powered down. I pressed the power button a few more times and the same result. The TV stayed on for only 30 sec.

I pulled the middle PCB whichs holds these circuits and I found the
D9A60 diode open and IC8C02, one of the convergence IC's fried. I don't know if these were like this before or after jumpering.

I replaced all bad components and I am back to square one. The K9A50 relay stays closed for 3 sec and the set does not power on any further.
Comment by TV_ITGuy, posted on Dec 19, 2007 Thanks for the advice ctf1800. I have read several posts that speak of the DM unit. I have looked in the back of my set and the DM unit is not in the location shown in the pictures. dcb8806.jpg
As I hope you can see in this picture, there is no DM unit to the far left, just open space. Also the service manual for the V17 chasiss does not speak of a DM module.

I checked the reisitors on the output of IC8C02 which are a couple of 3.9 ohm resistors in parallel. When I test them I get approximately 1.9 ohms, which is what it should be with them being in parallel.

Please let me know if I am off base on any of this. Thanks Comment by TV_ITGuy, posted on Dec 19, 2007 Also, I have replaced both of the Convergence IC's when I replaced the fuses and diode. postsolution.gif Post Solution
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ctf1800
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Rating: 84%, 2716 votes
first off you should replace both convergance IC and check the resisters coming off the output if any of the resisters are bad it will trash the ic on trying to power up.
i would also replace the caps in the DM section
http://www.jeremyburns.com/Mitsubishi-Green-Blinking-Light-Fix.pdf

http://chrisandnat.com/projects/blinkingtv/blink.htm

Comment by ctf1800, posted on Dec 20, 2007 there are six fusible return resistors ranging from 1.5, 1.8, 2.2, 2.7, 3.3, 3.9 Ohms. I would lift one side of the resister out.
check for any caps that look puffy and check the horz. out put transistor.
Rating Locked! (?) TV_ITGuy has rated this solution as Thanks for Trying

Hope this helps fortuna55@aol.com

Posted on May 29, 2008

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Slinteriors
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SOURCE: akai hd projection tv pt4299hd won't turn on

Sounds like a power supply issue. Does the power indicator light up? Can you hear a click when the power button is pressed?

Posted on May 31, 2008

  • 1 Answer

SOURCE: Mitsubishi WS-55807 TV won't turn on

I have the same problam,I got this tv for free and i am trying to find out what is wrong with is so i can fix it.has any of yall got yalls fix if so what did you do to get it to work.

Thanks
Dustin

Posted on Jul 01, 2008

  • 2 Answers

SOURCE: Need a "Mitsubishi HD-1080 HDTV Receiver" to convert my TV to HD

You con't need to buy anything other than a HD satellite or cable box. A television can either handle HD or not.  The high definition sets are monitors that are capable of handing an input of up to 1080i. 
Quick and dirty. Look in the back for blue, green, red cable input sockets. There should be matching cable outs. from your cable or satellite box. get a set of  component video cables, plug them in. Determine the audio type, where RCA jacks, Toslink fiberoptic or a component cable sock. In the latter you use a cable much like a yellow video. You can get away with using a yellow video cable if need be. Now, below more specifics if needed.

No, you don't want to by the add-on from Mitsubishi.  I am assuming you have a 16-9 wide format box  
If you have a squarish box, i.e. 4:3 ratio. forget it. I don't know if any wree made for HD, but unlikely.  If you'd given me the model number could be a little more definitive. If you have a manual, it will tell you whether you can go HDTV.  
Take a look in the rear of the set and look at  the connection holes. You should have at least one set of inputs, marked in some way with the Red, Green and Blue just on the inside of the cable hole. Those are tomponent cables pops that allow you to do high definition television. These cables are video only.; Sound is a second separate question. 
There are usually some other assorted things back there, including off air tele.and maybe another kind of connecter.. Some of these might be useful if you have games etc. that attach directly to the set. In any event, those component cables say that you can  do HDTV. (NB: 
The Direct TV  HD box should have component cable outputs. You can do this directly from the DiTV box to the set. You would also need a separate Audio Cable(s). Your set should have either a toslink fiberoptic hookup and/or a component audio cable. There's no inherent advantage between those two. If you have an old video cable (yellow) than you can substitute that. 
You should now have HDTV and high quality sound through the set. You will probably have to set up the inputs and other stuff with the.remote. It's pretty logical. If you have used input x for bringing in the video, just match it up.and your on your way. 
If you are going to confuse things by trying to connect another piece of gear, e.g. dvd box, you would go to inputs two. If you have the second set of component input, then hook an HD player to it. In this setup, you adjust the sound on the set according to how it works. I assume the DTV audiio can be controlled directly just as a cable box.  -- Here's what's going on. For several years Mitsubishi built higher end televisions without tuners or slots for cable (or satellite). But they were HD capable (as I said, not all). At the time, there was no HD that mattered and not even much of a standard for it. Some wanted 729p, others wanted 1080i The advantage for 720p over 1080i was supposedly the improved movement capture. 720p isn't dead, but it's not a problem. 
You will need to set the menu on the television (using the remote) so that it says 1080i. It does not do 1080p, the newer high standard. It only has two other settings of consequence, 480i and 480p. Put it on 1080i and leave it alone. The 480i and the 480P will be on auto pilot if you have an older DVD players. If there is a high definition signal at fewer than 1080, it will be upconverted to 1080i.. 
The set will handle any signal you send it like that. You probably have an HDMI  out from your dtv or cable box. The set does not have HDMI (unless on a later model). The DTV box should have both of them. That's a simpler wiring setup that allows 1080P. On the offchance you have a box HDMI only, you'll need a converter cable.
The setup gets a little more  complicated if you're using a receiver as a switcher, i.e. all inputs go there with only one output to the set. when ou do that you're in an area outside this question. 
  is this all there is to it. But It goes only slightly more difficult if you're hooking up the   . 


You don't need the box for the television set. 

Posted on Jan 22, 2009

Slinteriors
  • 8617 Answers

SOURCE: Mitsubishi Model # WS 65311 HD 1080 turns on then shuts off.

try holding in the menu and input/device buttons on the front of the set both together and see if it blinks a series of blinks, pause briefly then blinks a second series of blinks, let me know what the blinks were sush as 22 or 24

Posted on Mar 13, 2009

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IF POWER LIGHT COMES ON AND THEN GOES OFF:
DO THE SELF CHECK THIS SET HAS: ON THE FRONT OF THE SET PRESS AND HOLD BOTH INPUT AND MENU BUTTONS FOR AT LEAST 5 SECONDS AND RELEASE BOTH.

POWER LIGHT WILL BLINK A TWO DIGIT ERROR CODE LIKE: 2 blinks, 2 blinks, a pause and then it will repeat the code 4 more times.

Let me know if you get a blink code and I will tell you what it means.

If this information was helpful, rate this solution as very helpful as I do this here for free.

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The more you tell me the better I am able to help you.

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High Definition--WS-55807


IF the MITS has 3 component inputs blue red yellow RCA jacks on the back then yes at 480 or 720p, you'll need to attach 2 audio cables for sound. If it has a HDMI input then absolutely.
please rate!

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