Sharp lc-60eq10u power issue

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  • joec9999
    New Member
    • Aug 2017
    • 2
    • USA
    #1

    Sharp lc-60eq10u power issue

    Hi,

    I have a Sharp lc-60eq10u with power board DPS-167CP A. The symptom is two slow blinks followed by two fast blinks from the led on the front of the TV.
    I looked up the error code in the service manual and see it is related to UR+13V.

    I removed the power board and powered it up on the bench by connecting PS_ON to BU5V and was able to power up the board. UR+13V was present measuring about 13V. I also measured the voltage at C7800A/B and found that it started up at about 175 VDC and slowly climbed (took about two minutes) up to 395 VDC.

    At this point, I powered down the board and resoldered some questionable connections and put it back into the TV. After reapplying power, the TV showed the 2/2 blink error pattern again (without pressing the power button). I then pressed the power button and the TV powered up and played all day.

    I unplugged the TV and let it sit overnight. The next day I plugged it back in and the TV showed the 2/2 blink error again.

    The one thing I question is the +395 V across C7800A/B and how it took so long for it to build up while I was testing it on the bench. Could this be the issue?

    I'm not absolutely sure this is a power board issue and would like some input on this.

    Thanks in advance,

    Joe
    Tags: None
    • dskall
      Badcaps Legend
      • Oct 2016
      • 2905
      • usa
      #2
      Re: Sharp lc-60eq10u power issue

      I believe you should have your 175vdc at standby, and get your 395vdc almost instantaneously when powered on.
      I assume no responsibility for any stupid suggestions I might post.

        Comment

        • Andrew F. Ali
          Badcaps Legend
          • Jan 2014
          • 2450
          • Trinidad & Tobago
          #3
          Re: Sharp lc-60eq10u power issue

          The e-cap/s C7800A/B is probably bad...It my not show any physical evidence...The capacitance probably decreased over time.

            Comment

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