Question about Toshiba 61A60 TV

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61a60 Toshiba Flyback

True Story:

I went to Best Buy and bought a new 61" Samsung DLP to replace my 61" Toshiba. I wanted to move the Toshiba into the kids play room. When I got home the TV was on and it was on an input that had a blank screen. (I didn't turn it off) I powered up the device that was connected to that input which was a Digital Entertainment Center by HP. It started up and the screen was mostly blue except the HP startup logo. I walked into the kitchen and a few minutes later I heard a loud click. It sounded like a circular breaker popping. I looked back and the screen was blank and the red power led was blinking. (3 minutes topps it lasted after I bought a new TV).

I pulled the chassis out minus the power board which I left in and checked every fuse, diode, and rectifier and found nothing wrong. I replaced the STK parts and same problem. There was no audio playing at the time. I believe the flyback xformer might have blown, but I'm not sure. There was no smoke, and no burnt smell.

If this is my last hope, where can I find a replacement? I've looked everywhere for the part (Toshiba 23236623 or TFB3086AD) and I can't seem to find one.

Is there anything else that it might be that I am not checking. I looked at everything on the mating board except any small surface mount parts. Also, is there a way I can verify that the flyback is bad? I don't see any bulges, crackes, or burns.

Thanks

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  • 1 more comment 
  • manders1823 Dec 18, 2008

    I checked F851 and it is not blown. I haven't checked Q863 yet, but I will shortly.



    I had a short on Q404 from Base-Emmitter. I had a feeling it was because of a transformer, so I removed it. Sure enought, it was. I'm not sure if it is good though. When measuring it seems to be an NPN. I get about .560 from B-E, and B-C. But I get about .06 from E-C no matter which way I place the leads on it. Is that normal?



    Thank you so much for your time.



  • manders1823 Dec 19, 2008

    So I pulled up the datasheet and there is a 50 ohm internal resistor which is what I was reading. I had the B-E-C wrong. Now if I power up the TV, the light stays red (HOT removed). I can hear a little hiss from the speakers, but I don't think the amplifier will come off of mute until the picture is up. What comes after the HOT? Is it the flyback?

  • manders1823 Dec 29, 2008

    So I got the new HOT and replaced it. That didn't fix it, but I don't know how I didn't see this before but there is a liquid stain about 5" round right below the blue gun. Could that "POP" sound that I heard when the TV went out may have been the seal blowing for the coolant on the blue tube? Like I said above, the screen was mostly blue when the TV went out. Would a lose of coolant cause the power indicator to blink? Is this repairable?

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  • Toshiba Master
  • 5,138 Answers

Check fuse F851 andQ863 then solder all poor solder connections on main board and signal boards.

Posted on Dec 18, 2008

  • ladywinn
    ladywinn Dec 18, 2008

    Hori is surpose to read short base to eimmiter has internal diode,and if you are getting reading on base to collector ,then hori output is ok. But if it reads short also part is bad.

  • ladywinn
    ladywinn Dec 19, 2008

    Replace hori output and see what it does.You should be now to point that its either hori output -flyback transfomer or both. ACME FBT has best prices on them 1yr warranty have number at shop will have to get back to you with number, you can call Electronix Parts or go on line 1-800-233-3205 they may have parts you need.

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  • Master
  • 2,270 Answers

Have you check the HOT Q404?
I would suggest to check that transistor before you decide to replace the flyback. The way to know if you are getting high voltage would be to pay attention for like a charging/discharging static noise when you press the power button to turn the TV ON or OFF.

Let me know if you require further assistance.

Posted on Dec 18, 2008

  • 1 more comment 
  • Jaime Hernandez Dec 18, 2008

    Check this website or contact them to see if they have the flyback in stock.

  • Jaime Hernandez Dec 18, 2008

    You can google for a data sheet for that transistor and you should be able to see all the specs.

  • Jaime Hernandez Dec 30, 2008

    If the coolant leaked onto any electronic parts, that could have damaged the parts where it leaked. I would suggest to clean the assembly with alcohol and a brush to remove the coolant because is highly corrosive and conductive. The POP was cause by the coolant getting into the high voltage area.

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