Question about Hitachi 61SWX10B 61" Rear Projection Television

11 Answers

Hitachi 61iwx10ba Will not turn on

I was hoping some of the people here could help me out. I just got this Hitachi TV that appears to be 4-5 years old. If you try and turn it on, the power light will click between 5-14 times. I say that because sometimes it is 5 and sometimes it is 14. After taking the back cover off, I see the red led light and 2 green led lights. The two green led light appear to be on the center board and the one furthest to the left is blinking. I would appreciate it if someone could point me in the direction of the problem. Unfortunately I am in the process of getting my hands on a maintenance manuel for this, but have not been able to. The fuse by the power supply appears to be good, but I do not know what those other fuses look like that seem to also be problems. Any direction that someone could give me would be helpful.

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  • shadowlightz Jun 28, 2008

    Ok here is a little update. I found 5 led lights now. I see the red and the two in the center as before. Just to the left are two more. The third one from the left will not light up at all. The 4th one blinks with the 2nd one. So I get a solid green on the first one. The red one is also solid. The 3rd green LED does not light up at all, and the 4th one looking left blinks with the 2nd one from the left. I can supply pic if needed



  • shadowlightz Jun 29, 2008

    Ok I payed for a troubleshooting guide, but it isn't really helping. It told me to look at the PWB and check the LEDs on it, but the problem is that there is only one, and there should be two. Plus the LED on there doesnt light up. The fuses on the power board are good, and the guide recommends testing the solid state fuses, but doesnt say what they should measure to, or what you should do if they don't.

    I still have the 4 green LEDs. Going from right to left, the first one stays green, the second blinks, the third one stays dark, and the fourth blinks with the second. The red doesnt look like it blinks, but it does seem to pulse with the green LEDs when they blink. Eventually the whole thing shuts off in about 10 seconds.


  • shadowlightz Jun 29, 2008

    So far that hasnt worked

  • shadowlightz Jun 29, 2008

    Any idea which one?

  • shadowlightz Jun 29, 2008

    Would posting a picture help? I haven't been able to identify one that looks burnt. I was mainly zeroing in on the one LED that wasn't doing anything.

  • shadowlightz Jun 30, 2008

    Thanks for the info. Can you tell me where these parts are. I don't see them on the component locater on the service manual I have. So far I have been able to tell that the 2 fuses on the power board have no great amount of power going through them, but the convergence board has about 120 V going through it. Can you give me a picture or something of the route to test on?

  • shadowlightz Jul 01, 2008

    No go on the self diagnostic. Will not go into it.

  • shadowlightz Jul 02, 2008

    Ok I have some information. I have been testing some of the circuits on the deflection PWB board. The third LED (DP37) is burned out. I have tried testing it, and it will not light up. Since it is a diode in the circuit, should I go ahead and replace it? I have also been testing transistors. I am using base, emitter, and collector terminology. I am posting my values on the transistors below. They are being tested via Blue Point DVOM on diode mode with voltage first and ohms second.

    Q777 transistor C56811j2 = B to E = .00 V and .7 ohms
    B to C = .7 climbs to OL and OL Ohms
    E to C = .416 V and OL Ohms

    QH01 transistor 2sk2771 = B to E = .643 V and OL ohms
    B to C = .7 climbs to OL and OL Ohms
    E to C = .398 V and OL Ohms

    Q701 transistor FN52110 = B to E = .684 V and OL ohms
    B to C = .7 climbs to OL and OL Ohms
    E to C = .542 V and OL Ohms

    So am I correct in assuming that q777 transistor is shorted? And can someone tell me if I have to replace the LED?



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Ya sounds like it is shorted, replace the led if you think you can and you feel that is a/the problem.
Thanks,
Lee

Posted on Jul 02, 2008

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Hi

Can you take a video or picture in your unit... i want to see it clearly then upload here thanks!

Posted on Jul 02, 2008

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Following link helps on TV power supply troublshooting
http://www.highlandelectrix.fsnet.co.uk/repair/repair.html

Posted on Jul 02, 2008

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It seems to be shortened somewhere.try to call a technitian and dont try to fix it yoursself because a high voltage is carried at the back

Posted on Jul 02, 2008

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Yes its shortened.you first replace the transistor and then see if it does not work properly then replace the led.that will definately help .
and if does not help i will suggest you to get it repaired through a authorized service technician as there the company will charge you but will provide you the minimum warranty of six months.

please rate the solution as fixya if helped by it to solve your problem.wish you good luck.

Posted on Jul 02, 2008

  • hemant somaiya
    hemant somaiya Jul 07, 2008

    first try to replace transistor dont directly jump onto a decision of changing a led.

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Hello,

Unless you are an experienced TV Service Technician, do not try to fix things by yourself, There are chances of getting fatal electric shocks..

If you have a service manual/ schematic diagram, go for a step by step diagnosis..

1) Check O/P voltages of Power Supply are normal.
2) Check for shorts / open O/P transistors in horizontal & deflection circuits.
3) Check presence of drive on H-O/P transistor' base
4) Try changing the eeprom with a new programmed one.

Its best to go to a good service center & get this one repaired..

Posted on Jul 01, 2008

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At this point checking for fuses is a waste of time. The set detects a problem and is shutting down. The clicks indicate a number of attempts to start up. Check the following:

1) Check the horizontal output transistor for a shorted condition. If shorted, replace.

2) Check all of the solder connections on the main power supply board and resolder any that appear to be grainy or have rings.

3) Check the solder connections on the convergence ICs. These are large black ICs attached to a heatsink and should be marked STKxxx.

Report back with your results.

Note: The power supply board and the convergence board are still available as replacement parts. One option for you could be to have a detailed repair estimate generated by a local servicer. Taking that info, we can guide you through the actual repair.

Dan

Posted on Jun 30, 2008

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When it shuts off. Try doing what's called a self-diagnostic test.
As soon as the television shuts try these steps.

Pressing on the front panel's ?INPUT? and ?MENU? buttons at the same time, and holding for 5 seconds,
activates the Self Diagnostic Code Mode. The LED flashes denoting a two digit Error Code, or indicating no problem
has occured since the last Initalization.

Please do 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.
? 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.

The Error Code designations indicating a malfunction, or no malfunction, are listed below:
Self Diagnosic Code Description
1 - 2 = no error detected
2 - 1 = X-ray protect (high voltage or beam current)
2 - 2 = Short protect (short protect monitors low voltage supplies)
2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection)
2 - 4 = Vertical protect (usually loss of vertical from the source).

If you would like to attempt a DIY, you will need a service manual to guide you. You can find one here:
http://servicemanuals.vstore.ca/

However, be aware that there are voltages inside your TV set that can kill, even if unplugged.


Good luck.............

Posted on Jun 30, 2008

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Hello,

There is shortage in the input power in the TV projection. You can solve this testing voltage regulator in the or from the input power up to the horizontal and vertical projection of the TV. some of this due to busted diode however the most common fault are the capacitor and the regulator.

may this help

melnavz

Posted on Jun 29, 2008

  • Emelio Navaja
    Emelio Navaja Jul 02, 2008

    Hello,

    after identifying the busted parts, do some check in other circuit then replace it. however donot test the unit until such time that all the busted parts has been replace. this will burn out again the new parts.

    melnavz




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I think there might be some problem in the transformer ....
or due the over heating some of the capacitor might have burnt out .....

Posted on Jun 29, 2008

  • 2 more comments 
  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 29, 2008

    just have a look on all circuit boards is there any burnt smell or symbol ....

  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 29, 2008

    try to identify the burnt capacitor ...

  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 29, 2008

    as you have told that the power supply is in good condition so exactly the capacitor is burnt out

  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 29, 2008

    burnt capacitor may be on the power board (if the led s are in the board then check in which board the red light appears)...

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Check if their is an open resistor around the flyback and horizontal output transistor, if none try checking the jungle IC, it might lock of solder around the pins.

Hope that helps...

Posted on Jun 29, 2008

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