Sharp LC46D64U Power and OPC Flash

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  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12074
    • U.S.

    #21
    Re: Sharp LC46D64U Power and OPC Flash

    One guy traced his same blink code down to inverter 3. one there for 9 bucks, looks like plenty available. https://www.ebay.com/itm/Sharp-46-LC...ZG-r:rk:1:pf:0
    Last edited by nomoresonys; 11-11-2018, 10:07 PM.

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    • Icitte
      Senior Member
      • Aug 2011
      • 61

      #22
      Re: Sharp LC46D64U Power and OPC Flash

      Originally posted by nomoresonys
      One guy traced his same blink code down to inverter 3. one there for 9 bucks, looks like plenty available. https://www.ebay.com/itm/Sharp-46-LC...ZG-r:rk:1:pf:0
      there is a way to test it before?

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      • R_J
        Badcaps Legend
        • Jun 2012
        • 9512
        • Canada

        #23
        Re: Sharp LC46D64U Power and OPC Flash

        I think the manual is a bit misleading, page 62 says error is with DET_10V (pin57) of microprocessor, BUT pin 57 monitors DET_15V (page 104) Trace that back to page 120 and it monitors the UR15V from the power supply
        You might want to get the schematic for the power supply.

        What voltage do you have on the main filter C7820/21
        Check the resistance of R7641, it is a .1Ω/1W resistor that supplies B+ to Q7602 fet
        You say you replaced some parts froma SJ kit, were any of the parts you replace defective? ie shorted fets etc.
        Last edited by R_J; 11-12-2018, 06:44 PM.

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        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12074
          • U.S.

          #24
          Re: Sharp LC46D64U Power and OPC Flash

          Originally posted by Icitte
          there is a way to test it before?
          Read it in this thread. https://www.badcaps.net/forum/showthread.php?t=41621

          Comment

          • Icitte
            Senior Member
            • Aug 2011
            • 61

            #25
            Re: Sharp LC46D64U Power and OPC Flash

            Originally posted by R_J
            I think the manual is a bit misleading, page 62 says error is with DET_10V (pin57) of microprocessor, BUT pin 57 monitors DET_15V (page 104) Trace that back to page 120 and it monitors the UR15V from the power supply
            You might want to get the schematic for the power supply.

            What voltage do you have on the main filter C7820/21
            Check the resistance of R7641, it is a .1Ω/1W resistor that supplies B+ to Q7602 fet
            You say you replaced some parts froma SJ kit, were any of the parts you replace defective? ie shorted fets etc.
            /ok I know it's been a while, but I tested the V at C7820/21 one leg is -31vdc and the other one is around 58.8vdc

            R7641 test .1ohm

            hope you will accept to help me again!

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