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Zenith R56w36. STK 392-110 keeps burning out. Can I replace it with a STK 392-570?

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  • Patrick McAlexander Sep 13, 2010

    Very helpful. Thank you

  • Patrick McAlexander Sep 13, 2010

    Thank you. I don't have a 1.8 ohm so I put a 1.5 ohm 1 watt in with the stk 392-570 and I changed both. Now my blue and red is out. My ICs could have been bad. They were marked used. Just how critical is the resistor? Shouldn't 1.5 be close enough?

  • Patrick McAlexander Sep 13, 2010

    I guess what I am wondering is does the 570 have to have 50 v or will 38v be ok? Do I need to make voltage adjustments?



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Yes, you can use STK392-570 for better performance of convergence as this chip can work up to +/-50V with max 8A current where as STK392-110 can work up to +/-38V with max 3A current.
STK392-570 is better then STK392-110
Hope these info will help you.

Posted on Sep 13, 2010

  • Shahid Electronics
    Shahid Electronics Sep 13, 2010

    STK392-570 will work at +/- 38V and no need to increase volts up to +/-50V
    Resistance should be 1.8 ohms as it provides reference signal back to convergence section.
    You should have schematics of tv to work on circuit board.



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