Sony SDM-HX73 powers up and goes dark

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  • lkvee
    Senior Member
    • Feb 2009
    • 198
    #1

    Sony SDM-HX73 powers up and goes dark

    Had it sitting in the basement for a while. Powered it up to get the RGB floating box telling me there's no signal and then the image and backlight seem to go away. Pressing other buttons (like Menu) generate no reaction.

    I opened it up. Model number is IP-51125LB and board part number is 6871TPT251B.

    All of the capacitors are by Rubycon and were tested with ESR Micro 3.1:

    Rubycon XL (T0405):
    C110 & C111 (1000uF 10V) [2100uF 0.03 Ohms]
    C112 & C113 (1000uF 25V) [3300uF 0.00 Ohms]
    C206 & C207 (470uF 25V) [3300uF 0.00 Ohms]

    Rubycon YXA:
    C114 (100uF 25V) [3400uF 0.00 Ohms]
    C118 (330uF 10V) [2222uF 0.00 Ohms]
    C116 (10uF 50V) [9uF 3.00 Ohms]
    C108 (22uF 50V) [20uF 4.20 Ohms]

    What else should I examine?
    Attached Files
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    • PlainBill
      Badcaps Legend
      • Feb 2009
      • 7034
      • USA
      #2
      Re: Sony SDM-HX73 powers up and goes dark

      Measure the resistance across the secondaries of the inverter transformers. They should match to within 3%.

      PlainBill
      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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