Hisense 65K560DW Power Supply problem

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  • boyebaran
    Badcaps Veteran
    • Sep 2015
    • 247
    • iran
    #1

    Hisense 65K560DW Power Supply problem

    hi to all
    I have a Hisense 65K560DW TV with problems on the Power Supply Board
    part number: RSAG7.820.4877
    My issue was the standby 12V not stable and changing between 11.2 to 12 v. This was causing the power supply to go into a protection mode . Only symptoms externally was blinking dim standby led.
    Measured across VZ901 but the voltage was also fluctuating there. I discovered the rectified DC output from VD901 and VD902 was not stable with approximately a 40V ripple.i attached pdf
    please advise me
    tnx
    Attached Files
    Last edited by boyebaran; 11-17-2021, 03:05 AM.
    Tags: None
    • dskall
      Badcaps Legend
      • Oct 2016
      • 2905
      • usa
      #2
      Re: Hisense 65K560DW Power Supply problem

      Check for shorted parts and caps. in standby circuit
      I assume no responsibility for any stupid suggestions I might post.

        Comment

        • R_J
          Badcaps Legend
          • Jun 2012
          • 9514
          • Canada
          #3
          Re: Hisense 65K560DW Power Supply problem

          What are the E. B. C. voltages on V901? VZ901 may be bad

            Comment

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