Question about Mitsubishi WD-62525 62" Rear Projection HDTV

2 Answers

How do we solve this green blinking light on our Mitsubishi 62725? My husband is an Electrical Engineer and has taken it apart and replaced the capacitors. The green light is still flashing. We're frustrated. Can someone help?

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  • 9 more comments 
  • mcameron22 Jan 30, 2010

    when I hold in the device and menu buttons together for 5 seconds nothing happens. The green light of death continues to flash

  • mcameron22 Jan 31, 2010

    I see one more cap on the power board that looks swollen...could this be part of the problem

  • mcameron22 Jan 31, 2010

    I dont have the full service manual, all I have is the chassis part replacement instructions. Where should I check the supply voltage and what should I expect to see

  • mcameron22 Jan 31, 2010

    What should the voltage be at the standby power output and where is it exactly

  • mcameron22 Jan 31, 2010

    I am not getting any voltage readings at any of fuses mentioned in the diagram. the fuses that are not mentioned have some voltages (F9A08 = 12 VDC). I went ahead and replaced the one swollen cap on the power board (C9A62) and I am still getting the timer light and still no response when I try to check the error code. What is my next course of action

  • mcameron22 Jan 31, 2010

    Is there any way to just bypass the timer?

  • mcameron22 Jan 31, 2010

    I just double checked my voltage readings and D9A50 and D9A51 are marked as D9A60 and D9A61 on my board. I am getting -/+ 17 VDC on the diodes. does the 2V difference matter? Most importantly I am not getting the 3.3V on pins 6 and 8 of the PA (I am getting about a half a volt on pins 1 and 2 but nothing any where else on the PA connector.

  • mcameron22 Jan 31, 2010

    Are you still with me?

  • mcameron22 Jan 31, 2010

    Im not sure if Welcomjee is still with me or not and I am still haveing problems with the flashing green light of death

  • mcameron22 Jan 31, 2010

    I had 2 swollen caps on the FMT board. I replaced all four of them. I also replaced all four caps on the DM board. This did not fix the problem. That is when welcomejee suggested that it may be the power board. I only had one new cap left so I replaced the only one on the power board that looked swollen. Still getting the timer light. Is there anything that I can check to figure out which board is giving me the problem? ( I am pretty sure that I have the card reader unplugged also, that is the usb and ieee 1394 plugs on the outside of the DM board right?)

  • mcameron22 Jan 31, 2010

    I remember seeing the E2P board that you are talking about. I will have to break the chassis back down to get to it. I think that it was on the DM board. In the mean time what can you tell me about the chassis replacement program that Mitsubishi has...how do I get one and what is involved with installing it

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2 Answers

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  • Mitsubishi Master
  • 14,553 Answers

First : if you just replaced 1 cap it is a good idea to replace all four; and if the green light does not stop blinking (it is the FMT booting up) you will not get the 3.3 volts.

Some information for you that you may or may not know: all these sets are failing with three primary boards--the power supply board, the FMT board, and the DM board.

It has gotten so bad that about 2 months ago Mitsubhishi began a chassis replacement program---entire replacement chassis that wholesales for about 200.

If you have the assembly instructions you can see where the other two boards are---the problem with these sets is if repairing the power board fixes it, there are dozens of surface mounted caps on the other two boards mentioned that also start to fail, fix one board and a few months later one of the other two go.

I presume you also followed the instructions to unplug the card reader located at the front of most of these sets as it can (not often) cause this problem.

You may also want to at that time unplug the keyboard and set if the set will turn on--once in a while the actual reset button will be bad--seen three of them.

Considering how much time is involved to get this set apart if it was not the caps etc on the power board I would at least look into the chassis replacement----these sets were not one of Mitsubishi's finer design ideas.

Let me know if you have questions.

SD TECH

Posted on Jan 31, 2010

  • SD Tech
    SD Tech Jan 31, 2010

    FIRST: If you found bad caps on more than one board very low chance you are going to fix it--I went thru dozens of these sets with this problem---Mitsubishi would (these sets had this problem from day one) say "change this board" and then if it did not fix it change another and another--at some point they would have wasted hours of our time and just send a chassis to get it out of the way.

    As I am sure you know---caps can look perfect and be open-----I do not expect anyone can point to a specific part here that will cure your problem----the fact you have bad caps on more than one board points to maybe more than one is now damaged/bad.

    One other faint thing that may or may not help-----Did you see the E2P board? The tiny board that plugs into a large board its either on FMT or DM. The set uses the 2 eproms on that board--if you remove it and the set comes on(it will look very bad) it is bad.

    I am old school repairman----repair to board level but these newer sets sometimes are just not practical to repair in this way. Replace all four caps on power board and check any pico fuses near them. If that is no help consider a chassis replacement.

    SD TECH


  • SD Tech
    SD Tech Jan 31, 2010

    Contact Mitsubishi---I think the program requires you to go through an authorized dealer. I was in the shop two months ago where I used to work and they had 3 of these sets lined up and were replacing entire chassis in each.

    SD TECH

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  • Master
  • 10,594 Answers

Hi,
Flashing green light shows TV got some problem, thats it.
Now in what section/ circuit it got problem, there is procedure to read out error code and check it in error code list to check listed sections.
All this info are available in service manual including part number list, schematics, exploded views info, that can be downloaded from HERE for small fee.

Below is procedure, how to activate error code operational check...

The TV must be in “Shut Down” and not manually switched Off, to perform the Error Code Operational Check. When the TV is switched Off, the code automatically resets to “12” No Error.
Press the front panel “DEVICE” and “MENU” buttons at the same time, and hold for 5 seconds to activate the Error Code Operational Check. The LED will then flash denoting a two digit Code.
Note: The front panel buttons must be used, NOT those on the Remote Control.
• The number of flashes indicates the value of the MSD (tens digit) of the Error Code.
• The flashing then pauses for approximately 1/2 second.
• The LED then flashes indicating the value of the LSD (ones digit) of the Error Code. Example: If the Error Code is “32”, the LED will flash three times, pause, and then flash two times.
• The Error Code is repeated a total of 5 times.

Now you have error code, check it in list...

12 No error detected
22 Recovery from momentary Reset
32 Lamp Cover open
33 Air Filter Cover open
34 Lamp abnormality
35 Chassis Fan failure
36 Exhaust (Back Cover) or Lamp Ballast Fan failure
37 Engine (DMD or Lamp) Fan failure
38 Excess Lamp Temperature
39 Excess DMD Temperature
41 Short Detected
44 DVI Cable (between Chassis and Engine) disconnected

Hope this info will help you.
Thanks.




Posted on Jan 30, 2010

  • 1 more comment 
  • Shahid Electronics
    Shahid Electronics Jan 30, 2010

    when I hold in the device and menu buttons together for 5 seconds nothing happens. The green light of death continues to flash
    ===========================================================

    OK, That means standby power supply is suspected, please check standby output voltage as mentioned in service manual.
    In my opinion, system control chip is not getting proper voltage to boot up properly.
    Thanks.



  • Shahid Electronics
    Shahid Electronics Jan 31, 2010

    Full service manual is not even exist for this TV because circuit boards are not supposed to be repaired on component level.
    Yes, swollen capacitors can cause of this problem, power supply section is mentioned in service manual, need to test/ check carefully.
    Thanks.



  • Shahid Electronics
    Shahid Electronics Jan 31, 2010

    What should the voltage be at the standby power output and where is it exactly
    =================================================================

    2 images taken from service manual are appended below that shows power board location in tv (top view) and standby power circuit for its output volts.
    Hope this info will help you.






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