Question about Mitsubishi WT-46807 46" Rear Projection Television

5 Answers

SD Tech, I have a Mitsubishi WT-46807 when turned on it shuts itself off. If you could please send me the syep-by-step instructions to fix this I would be willing to give you the highest of reviews. wiley013@yahoo.com

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  • wiley013 Oct 03, 2010

    The self test error code is "2 blinks - pause - 2 blinks" 22 if that makes a difference.

  • wiley013 Oct 03, 2010

    The self test error code is "2 blinks - pause - 2 blinks" 22 if that makes a difference.

  • wiley013 Oct 03, 2010

    The self test error code is "2 blinks - pause - 2 blinks" 22 if that makes a difference.

  • wiley013 Oct 05, 2010

    If you could get this question to SD Tech.

    Thank you

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5 Answers

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  • Master
  • 666 Answers

Unfortunately this problem is going to require a technician to diagnose but of the two things it could be neither part is very expensive your problem is either a faulty fuse or circuit or that your power supply for the television has burnt out and is going to need a replacement. the whole ordeal would probably take a tv repair tech maybe an hour to diagnose and fix so labor should not be expensive and i would suggest getting the tv fixed professionally to avoid doing anymore damage to it in the process of fixing it



hope this helps
Robb

Posted on Oct 07, 2010

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  • Master
  • 2,777 Answers

This is a failed power supply, step by step instructions are extremely difficult. That's like trying to explain how to rebuild a carburetor on a car over a chat like this. You are going to want to take it somewhere if you have no idea how to do it.

Thanks
Tim

Posted on Oct 07, 2010

  • Tim Grayson
    Tim Grayson Oct 07, 2010

    Wow ok I wish you would have let me work with you a bit more before rejecting my solution :(

    Oh well
    Tim

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  • Mitsubishi Master
  • 6,993 Answers

Hello,

your TV is having a power problem. The power supply board is defective that's why the TV powers off and blinks. Its receiving power but it cannot transfer the current to the necessary part of the TV because a capacitor, diode, etc may have been faulty. Until these bad components are replaced, the TV might not come on.

If you know about TV repairers, I would suggest that you open the TV and read the power board/panel with a meter, detect the bad component and replace it. Take note that TV stores a lot of current that can shock, so leave the TV for a while before you open it.

You can go further by checking the TV's line transformer. When a TV line transformer is faulty, it can cause TV to blink.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you.

I wish you good luck.

Posted on Oct 05, 2010

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  • Master
  • 10,515 Answers

Hi,

It seems that SD tech is not available at this moment unless he might have answered this question. I would be glad to help you to fix this problem.

the code 2-2 does indicates a short protect fault, which is usually caused by a failure in the convergence section. This is a very common repair in these sets. The typical repair involves replacing the convergence ICs (integrated circuits), and testing/replacing two small pico fuses.

The replacement ICs for your set are part number: STKxxx-xxx and are available from www.encompassparts.com for $19.95 each (needs two). You will also need at least one (likely two) 5 Amp pico fuses. If you wish to repair this yourself, the ICs are located on the large heat sink on the center (Power) PC board. The fuses are also on this board, near the center, location numbers: F9A04 and F9A05. You would need soldering equipment and very good soldering skills to replace these parts.

SD Tech,

I have a Mitsubishi - de2b852.jpg

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SD Tech, I have a Mitsubishi - 73c0734.jpgsrc="http://i.fixya.net/uploads/images/73c0734.jpg" alt="73c0734.jpg" class="h_mi" />



If you were to call a local shop to repair this, the labor to replace these is roughly $250-275 (in my area) if the TV were brought in to the shop. Please add a trip charge if repaired in the home.

The fuses must be tested with a multimeter to see if they are bad. They are only $2.50 each, so most people without a meter just change them both. If the repair has any problems, like a solder bridge, you may need a meter to check them after that. A good magnifying glass helps prevent solder bridges (for me, anyway).

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

PS - Do accept my solution,if 1005 satisfied from my response so that i could get the credit and a good review would also be appreciated.

Posted on Oct 03, 2010

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  • Mitsubishi Master
  • 12,061 Answers

Http://www.download-service-manuals.com/manual.php?file=Mitsubishi-1332.pdf
Above please find your service manual, if you decide to DIY.

This is a classic switchmode power supply, the special fault detection circuitry in the PSU, well, it is shutting the set down to avoid a fire, explosion, or both. This set had developed a problem, that is potentially so severe that the set must be shut down, immediately.
This set should be removed from the Power,
Now if you are wanting to have a go and try to repair you set, well OK But PLEASE, start in the right place, otherwise you will simply waste your time and money, You see, you MUST start, in the right place, The power supply, FIRST, as, if, that isn't right, nothing else can be. But you simply cannot do anything without a Service Manual. In this it has everything one needs to repair the set. OK if it is shutting down, after that amount of time, of working and then faulting, then it is most definitely a "Thermal" problem, the way we "Find" problems such as this is "Freeze Spray" you use this on each component that is suspected of being the "Culprit" and you will soon,find that errant component. Now, also not every fault is a Capacitor, I see many, many people that think, that Capacitors are always the "Culprit" and replace them, because someone else had done so and it worked, well that maybe sometimes true, but most Symptoms, can, and do have many, many different "Causes" & also, now while that may be true in a few cases, a faulty Electrolytic Cap, or even, ordinary, Cap goes faulty, this is only a SYMPTOM, something has damaged those caps causing them to "Fail". One MUST always find the root "Cause", otherwise if you just treat, the SYMPTOM, the "Cause" will just make the "Symptom" come back, in short order, as the prime cause still, hasn't been fixed., Now Capacitors hate AC ripple, or Over Voltage. Thats it. Oh.. and Heat, if these Capacitors, are too close to a Heat Source, then thats a prime cause of failure. Resistors, hardly ever go faulty,and if they do, it is generally obvious. However it doesn't hurt to check values with our Multimeter. Remember though resistors are made, with up to 20% tolerance from stated value, as such, are not too critical, unless in Timing circuits etc. Always check, the Values, of resistors, as with any other component, with the power OFF. Now Diodes especially "Zener Diode", are another thing to check, those and ordinary "Signal Diode" should always be suspect. next we have Transistors and IC's. The Transistors MUST ALL be checked to see if they have a good, "Junction" this is done, with our meter set to "Diode Test" and usually are about 0.6 to 0.7. With IC's you must check, voltage levels, or Logic Levels, going in and out, have a look at the circuit diagram, and it will tell you what they should be. It is a good idea to always measure the Power Supply voltages, see if a "Rail" is Low, that will be because some component has gone somewhat or all short circuit, to Earth, now, if the "Rail" is Higher, suspect an "Open Circuit" component, like a Diode, or Transistor. The voltages expressed in the manual are spot on, ANY variation MUST be investigated. I have been doing all this for over 30 years now, and I do indeed wish, we could have a set of "Symptoms" and be ables to say.. "Oh that;s the so-in-so and replace this" however unfortunately this although does happen, most "Symptoms" can have literally tens, of "Causes" all often "Interlinked" One simply has to do a methodical troubleshooting procedure, and always think, "are my Voltages Correct" as this is how, you Fix the problem, by making them so. Keep up the good work. If that link above doesn't furnish a Service manual, it is imperative you get one, even if you must pay for it. It will pay for itself in about 2 mins.


In my professional recommendation, though, you should get a "Quote" for repair, from, an, Approved Service Center, this point is very important for a good result, Always contact, their local, "Head Office" Now, when you get the information you want, then you can decide as to repair of replacement. The reason we want an approved agent, is that way, all the engineers are trained on their own brand sets, they have seen almost all faults, and will get the job done quicker, and for less cost, and usually have parts on hand, also sometimes, there has been a service bulletin in issued and the repair may be subsided or even free.
These rear projection sets are the hardest, and most complex, units to repair... The Tools you will need are A SERVICE MANUAL a Good Multimeter, a Signal generator, a Signal Tracer, pref an Oscilloscope, Soldering Iron, De-soldering iron, Probably, too, A SMT Hot Air desolderer (for the Surface Mount IC's), Compressed Air, An Anti-Static Wrist Strap, (MOST IMPORTANT, to prevent ESD), Cutters, Screwdrivers, sometimes, Torx, drivers too. Tweezers, are real handy, a magnifying glass, or eyepiece, a good strong white Light. OH, and you MUST have the original remote control too, (Sometimes one must obtain, purchase, a special "Servicing remote") as one needs this to "Program" the Computer in the TV, after, and during servicing, and to be able to put the TV, into "Service Mode" too.

Posted on Oct 03, 2010

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1 Answer

My Mitsubishi WT 46807 will not power up. The green light on the front stays on for approximately 2 seconds and then goes out with no audio or visual. I tried unplugging the set for about 15 minutes but...


yes!

When you turn set on and power light goes out do the self check this set has.

On front of set when light goes out press and hold both the Menu and Input (device) buttons at the same time and hold both for at least five seconds and then release both.

Power light will blink a two digit error code like 2 blinks,2 blinks, a pause and repeat it several times.


Let me know what error code you find and I will tell you what it means. Make a comment here and I will assist you.

SD TECH

Nov 27, 2010 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Mitsubishi model Wt-46807 Power shuts down after turning on. Tried the solution of pressing the menu & input buttons at same time for at least 5 seconds. Power light error code was 2 blinks/pause 2...


hi,
Error code 2-2 indicates "Short Protect Circuit" problem in tv.
Need to check pico fuses in power supply as one or two got blown due to bad convergence chips.
Below is an exploded view of tv chassis, power supply and convergence area has been marked to give you better idea to look for pico fuses.
Unplug tv from wall socket before to repair/check any thing inside tv.
Hope these info will help you.
Let me know if you have additional question.
Thanks.

763826c.jpg

Oct 16, 2010 | Mitsubishi WT-46807 46" Rear Projection...

5 Answers

I would like to get a copy of the instructions to replace or resolder the convergance IC's on a Mitsubishi WT-46807 from SD Tech please thanks, DT


DT? I am becoming famous with these instructions--having done the repair hundreds of times and getting asked the same question here by many people I composed the step by step instructions.

Once you get the instructions all I would ask is you rate them with a vote on this question.

SD TECH

Jan 25, 2010 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Mitsubishi WT-46807 Bottom of picture cut off


YOU HAVE A VERTICAL DEFLECTION PROBLEM, THE RETURN CAP IS DRYING OUT AND MUST BE REPLACED

Dec 27, 2009 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

When i turn it on it shuts right back off


Please do the self check this set has:

When the power light comes on and goes out press and hold both the MENU and Input (also called Device) buttons at the same time for at least 5 seconds and then release both buttons.

The power light will blink a two digit error code--for example--2 blinks, a pause and 2 blinks.

Let me know what error code you find and I will tell you what it means and what may actually be the problem.

I am here to help people.

If this information has helped you rate this solution as I do this here for free.

SD TECH

Dec 16, 2009 | Mitsubishi WT-46807 46" Rear Projection...

2 Answers

Two pulses, a pause and two pulses


two, then two blinks is error code for short protection. Do you know what it means?

It means most likely (98%) one of the two fuses that protect the convergence circuit in this set are blown.

I have instructions if you want to fix it--the 46 inch set you have listed is not the most easy to fix but for the problem you have-most shops are going to get 300 or more--you can if you are able to do it yourself do it for less than 30 dollars.

Let me know if you have questions or need instructions and I will help out.

If this helped out, rate this solution as I do this here for free.

SD TECH

Dec 14, 2009 | Mitsubishi WT-46807 46" Rear Projection...

2 Answers

RGB on each side have a hard time lining up. After some time the screen will get fuzzy and then the RGB will line up. It seems to take longer and longer for this line up. Is this worth fixing or should I...


Mitsubishi WT-46807?

If convergence goes in and out you need to replace the two STK-392-570 convergence chips this set uses.

I have repaired a lot of these sets and sometimes the chips are flaky---convergence will come and go--in every case replacing them cured the problem.

Considering you can buy a pair of the chips on Ebay for about 12 dollars plus shipping if you or someone you know can do this repair--you can save the set and a lot of money.

Most shops are going to get at least 300 for this repair.

By the way-----I HAVE START TO FINISH, STEP BY STEP INSTRUCTIONS FOR THIS REPAIR.

They tell you everything that you will need to do it and how to do it. The reason I have them is so many people here have asked me the same questions I composed them---I got 2 comments today from people who had success with the instructions.


IF YOU HAVE ANY QUESTIONS OR NEED ADVICE DO NOT HESITATE TO REPLY HERE- I am here to help people.

If this information helped you, rate this solution as I do this here for FREE.

SD TECH

Nov 14, 2009 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Does the Mitsubishi WT-46807 need a converter box to receive a HD signal?


Yes, this model only has one HD input--it is the one marked on the back of the set as DTV---you need to hook a box for HD to that input.

SD TECH

Oct 23, 2009 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Mitsubishi WT-46807


MY FRIEND YOU HAVE A POWER SUPPLY PROBLEM AND MAYBE THE CONVERGENCE IC'S ARE BAD.THERE ARE A FEW TRANSISTOR IN THE POWER SUPPLY THAT HAVE TO BE REPLACED FIRST.




CAYPIANAN@YAHOO.COM

Sep 23, 2008 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Powering down


THAT'S CORRECT, YOU NEED SOMEONE WITH ELECTRONICS SKILLS TO FIX THIS PROBLEM. YOU HAVE A POWER SUPPLY PROBLEM AND I BELIEVE THAT THE CONVERGENCE IC'S HAVE TO BE REPLACED TOO.SO CALL AN EXPERT IT WON'T COST MORE THAN $350.00

Aug 25, 2008 | Mitsubishi WT-46807 46" Rear Projection...

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