Question about Mitsubishi WS-55411 55" Rear Projection Television

1 Answer

Ws-55411 sound no picture . Power LED flashes upon unit plugged in = micro processor AOK. Error code Op check is 1 2 = No error. Power supply voltages are all present although 10% low. I can hear the HV come up. No filaments lit on CRTs. Unit was working and while watching picture faded away.

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  • tdoherty582 Sep 15, 2010

    I was pretty sure it was the main board, so I have remove it for closer inspection.
    I will not be able to power unit up for now.
    Where does the glycol(?) leak?

  • tdoherty582 Sep 21, 2010

    I have schematics. The heater voltage is DC and should be around 6.5v from what I can tell from the schematics. I ONLY get about .6v DC. When I unplug the heater voltage source from the CRT boards, voltage jumps to 6.5v DC. Tried isolating the CRT boards from each other and no change.
    Also eliminated the Red CRT itself from the equation and still no increase in voltage.
    My guess is it is Q5A36 on the power deflection board.

  • tdoherty582 Sep 23, 2010

    Found a bad /open pico fuse near the 7v source on the Main Board. Replaced it and I'm back in business.

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  • Mitsubishi Master
  • 14,553 Answers

Yes, 1,2 is no error detected. You may want to unplug set and try to turn it on again--if it was unplugged you will always get 1,2.


Based on model, have you looked for any signs of GLYCOL leaks inside the set?

I can tell you what and where and how to look.

SD TECH

Posted on Sep 15, 2010

  • 19 more comments 
  • SD Tech
    SD Tech Sep 15, 2010

    TWO ways to do this: we can exchange emails here--site tells me when you comment or if you have Yahoo IM we can chat there--

    SD TECH

  • tdoherty582 Sep 15, 2010

    No Yahoo IM. emails will have to do. Looking for glycol leak info.

  • SD Tech
    SD Tech Sep 15, 2010

    Each of the three picture tubes has a sealed area with a clear liquid called Glycol, it is to keep the face of each tube cool.

    I will give instructions: remove front speaker grill (it should pull off and is secured with plastic pegs) remove inspection plate behind it.

    Let me know when you have done this.

    SD TECH

  • tdoherty582 Sep 15, 2010

    done.

  • SD Tech
    SD Tech Sep 15, 2010

    With a flashlight look closely at the three boards, if Glycol it will be seen in the first three inches from the front. It will appear in two ways--either as a clear liquid or discoloration of solder connections. Connections that should be bright silver will look dull and discolored.

    You have to look very close--it does not take much to cause problems--GLYCOL is like antifreeze but more concentrated and toxic=====if you see liquid do not touch it!

    I have been in this situation and know what to look for and did not see it at first.

    As you look from front with plate removed it will be seen either on middle or right board (right board is signal and Micro board--green in color and other boards are tan colored.

    You are not looking for a lot of liquid or like a cat peed on board, a tiny amount will cause problems.

    Take your time--look very careful---look at the dust and if it is disturbed or looks like something not dry let me know.

    SD TECH

  • tdoherty582 Sep 15, 2010

    I took a magnifying glass to the boards and saw nothing. The Main board, as I mentioned, has been remove and was easier to inspect no clear liquid or discoloration anywhere on the boards.

  • SD Tech
    SD Tech Sep 15, 2010

    If no Glycol and filaments on crts do not light (you should still have audio) problem is on power deflection board (on far left as you look from front) filaments come from that board. Do you have sound?


    SD TECH

  • tdoherty582 Sep 15, 2010

    yes

  • SD Tech
    SD Tech Sep 15, 2010

    Problem is on deflection/power board on left as you look from front. You do know this set has a light box?
    SD TECH

  • SD Tech
    SD Tech Sep 15, 2010

    KEEP IN MIND I AM in California, about to go offline in a few minutes. I will be here tomorrow after 10 in morning Pacific time.

    You here?

    SD TECH

  • tdoherty582 Sep 16, 2010

    I'm in MN. so I went to bed before you.
    As I stated, I do have sound. I have continuity through the filaments. approx 2.3 ohms.
    A voltage reading of .5 V going to the filament.
    I have a HV probe. Can I measure HV at flyback with one anode lead removed?

  • SD Tech
    SD Tech Sep 16, 2010

    Filament voltage should be over 6 volts! (ac voltage)

    One of two things can cause it---either the source (follow it back from the crt board) is bad or one of the tubes is bad and pulling it down (unlikely) The voltage is AC not DC.

    Resistance check will not tell you much--should be low across the two filament leads.

    It looks like wherever the voltage comes from it is your problem.

    It is almost always inducted from the HV transformer---follow the filament leads back and see if there is a open protect resistor between the source and the crts.


    SD TECH

  • tdoherty582 Sep 16, 2010

    Do you have schematic of this unit?
    If not, they are available at
    http://www.techlore.com/downloads/file/7...

    I don't see any opens or discoloration anywhere near the circuitry associated with the 'heater circuit. Not sure how the heater circuit even works????

  • tdoherty582 Sep 16, 2010

    Do you have schematic of this unit?
    If not, they are available at
    http://www.techlore.com/downloads/file/7...

    I don't see any opens or discoloration anywhere near the circuitry associated with the 'heater circuit. Not sure how the heater circuit even works????

  • tdoherty582 Sep 16, 2010

    Do you have schematic of this unit?
    If not, they are available at
    http://www.techlore.com/downloads/file/7...

    I don't see any opens or discoloration anywhere near the circuitry associated with the 'heater circuit. Not sure how the heater circuit even works????

  • tdoherty582 Sep 16, 2010

    Do you have schematic of this unit?
    If not, they are available at
    http://www.techlore.com/downloads/file/7...

    I don't see any opens or discoloration anywhere near the circuitry associated with the 'heater circuit. Not sure how the heater circuit even works????

  • SD Tech
    SD Tech Sep 16, 2010

    You can look for a schematic but no filament voltage most likely means no High voltage--you read the voltage (AC) ACROSS THE TWO LEADS.

    If you find a schematic let me know and I will help.

    sd tech

  • tdoherty582 Sep 16, 2010

    I have the schematic. Found it at the web site in thread above.
    When the set is turned on, I can hear the HV come up.

    I also have a HV probe to measure it, but the anode caps are RTV'd on and hard to get to.
    Can I measure from the FBT with the anode lead removed???

    When the unit failed, it faded away.

  • SD Tech
    SD Tech Sep 16, 2010

    do not try it at the anode---the glue is to prevent arcing---should be able to measure at HV splitter block.

  • SD Tech
    SD Tech Sep 21, 2010

    If voltage comes up when you remove one of the tubes at a time--source is good--usually filament voltage goes to green crt and distributed to other two tubes for use.

    The picture tubes are analog and voltage should be AC not DC.

    YOU need to find which board is causing the problem--you may have to do this in a physical way--disconnect lines from green to other two tubes one at a time--IT IS VERY UNLIKELY to be one of the tubes but it is remotely possible.

    SD TECH

  • SD Tech
    SD Tech Sep 23, 2010

    Good, Please go to this page and rate solution as "VERY HELPFUL" SO I get credit for helping you.

    SD TECH

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1 Answer

Ws-55411 flashes 1-2 code 5 x's will not come on?


This sounds like a power relay has failed. Sounds like it gets enough power to tell you the error code, but not power on the t.v. many times fuses can be hidden inside a layer of heat shrink tubing and these are what are called through hole fuses. They will normally look like a large resistor on end without and value markings.

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My T.V. Will power on for a couple seconds then immediately turn off! Please help!


Hi,
Unplug the unit from the outlet for at least 1 hour and check if the symptoms persists. If yes, check if the unit can give an error code by following the steps below.
- Power on the unit and wait until the initialization takes place.
- Press the front panel "Input" and "Menu" buttons at the same time and hold it for 5 seconds, it will activate the error code mode. LED flashes a two digit error code. Example, if the error code is "22" the LED will flashes two times pause and then flashes two times and will repeat the error code for 5 times.
"12" means no error has occured.
Please let me know what will be the result to assist you further.
Regards,jimvincentvillanueva@yahoo.com

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1 Answer

BLINKING GREEN LIGHT AND WILL NOT POWER UP


You can check the Error code by doing the following.

On the Front panel hold down the Device and Menu Button for 5 seconds. The LED light will then start flashing the first set of flashing lights is for the "1"5 part of the code it will then pause for about a half second and start the ones place 1"5". The code will repeat 5 times before going off.

The Error Codes: 12 - Normal Operation; 21 - X-Ray Protect; 22 - Short Protect; 23 - Loss of Horizontal Deflection; 24 - Loss of Vertical Deflection.

The problem may also be in the power supply when you first plug the device in check how many times the Led blinks if it blinks for just over a minute the power supply is working fine. If the Led blinks repeatedly and does not stop the DM is not running.
This is a link to the service manual for you TV,
http://www.service-manual.eu/model.php?id=2710

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1 Answer

After the green blinking light turns off I can not turn on the power ,I push power the green light turns on for about 2 seconds then turns off


Hi Robert,

This is an indication of faulty bulb and/or its power supply section. Once the processor sense failure on the bulb the unit will automatically shuts off and led will flash an error code. Also, you should check its power supply first before replacing the bulb because the same symptom will be encountered if there was faulty in that area. Check open fuse/fusible resistor in line with the supply, bad solder joints and leaky capacitor.

Hope it may help you.

Have a nice day!

Thanks for using Fixya.

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1 Answer

Model WS55819, shut off and won't turn back on. The first few times I tried to turn it on, the indicator light came on and went off after a few seconds. Now there is nothing. I removed the panel from the...


Hi,
Most common problem in WS-55819 is failure of convergence output chips and blown pico fuses in power supply section.
You need to read out error code in tv, procedure is as follows:
Pressing the front panel "INPUT" and "MENU" buttons at the same time, and holding for 5 seconds,
activates the Error Code Mode. The LED flashes denoting a two digit Error Code, or indicating no problem has occurred since the last Initialization.
Note: The front panel buttons must 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.
• The Error Code is repeated a total of 5 times.
Example: If the Error Code is "24", the LED will flash two times, pause, and then flash four
times.
Error codes detail:
The Error Code designations indicating a malfunction, or no malfunction, are listed below:
"12" ... indicates no error has occurred.
"21" ... X-Ray Protect circuit.
"22" ... Short Protect circuit.
"23" ... Horizontal Deflection failure.
"24" ... Vertical Deflection failure.
This way you can determine what section got problem in tv and causing problem.
Let me know if you need further info.
Thanks.

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WS-55411 What seven capacitors need replacing? 2-3 code Problem


U check the power supply board,check all cap,and replaced it?Ur tv make buzzing noise when u turn on power?Ur flyback is dead.

Mar 17, 2010 | Mitsubishi WS-55411 55" Rear Projection...

1 Answer

Do have power and sound, do not have picture


this unit has a self test check you can do

when the set shuts down or when the set is turend off.
press and hold , onthe front of the set the input or device button, and hold the menue button for bbout 5 seconds.
the set will flash a 2 digit blink code at you.
12 blik = no problem
21 blink = xray protect
22 blink = short protect
23 blink = loss of deflection.

regards,
daniel.

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1 Answer

Mitsubishi WS 55809


Here's something that might also be useful. After you turn on the set, and get the regular red blinky lights, hold down the Device and Menu buttons together for about 5 seconds.
The Power light will start to flash in a two digit sequence.

For example, 3 flashes, then 7 flashes = 37.


Here are the error codes, and the corresponding problem:

12 = No error detected, check power supply.
32 = Lamp Cover is open.
33 = Air filter cover is open.
34 = Lamp abnormality
36 = Light Engine (DMD or Lamp Fan stopped)
37 = Exhaust or Lamp Ballast Fan stopped
38 = Lamp Temperature High
39 = DMD Temperature High
41 = Short is detected
44 = DVI cable between FMT and Engine disconnected

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2 Answers

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most of the time the convergance ic go bad:
but try this:
The 3 flashes of the led when you plug the unit in is the
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This unit has an error code diagnostics.

On the front panel of the unit press and hold the INPUT and MENU
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The unit should activate it's error code mode.

The led will flash count the number of flashes. It will then pause for
1/2 or 1 second. The led will flash again count the number of flashes.
The unit will repeate this for about 5 or 6 times.

You now have the two digit error code. The first time the led flashed
is the first number of the error code, the next time the led flashed is
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12 ----------- indicates no error
21 ------------- X-Ray Protect circuit
22 ------------ Short Protect circuit
23 ------------- Horizontal Deflection failure
24 ------------- Vertical Deflection failure


Most units give a error code "22" short protect circuit. If so check:

Q5A00
C557

If Q5A00 check bad there are other parts that have to be checked or
replaced.

If you are able to do above call a tech to service the unit

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1 Answer

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