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Sharp LC-80LE632U Main Board SMD's Identification

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    #1

    Sharp LC-80LE632U Main Board SMD's Identification

    I am working on a Sharp LC-80LE632U that is flashing the error code (two short two long) that indicates an error with the UR13v. I have briefly checked the power supply and have found no indication of the fault being there (yet). I decided to check the main board and have come across what I believe are one or two shorted ceramic capacitors. I'm just not sure that they are actually capacitors. I was wondering if anyone could look at the images and help me determine if the two are indeed capacitors. I have uploaded two images. One of the main board (QPWBXF733WJN2, KF733, FM24S) with the area circled with a arrow pointing to the two SMD components in question. The second image is a close up of the two SMD components. If they are indeed capacitors, one or both are shorted.
    Thanks in advance for any help!!!
    Attached Files
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    #2
    Re: Sharp LC-80LE632U Main Board SMD's Identification

    It may not be the caps (22µf/6.3v) One end connects to PGND, the other end connects to L9603, the other end of L9603 connects to Q9601 (dual mosfet FM808ME)) pins 7&8, Drain, and it's source connects to ground. OR, it could be that the D+1.1V which connects to the point between the two caps and L9603 is just at a low resistance.

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      #3
      Re: Sharp LC-80LE632U Main Board SMD's Identification

      Thank R_J for identifying the caps. I did not consider Q9601 because I did not see L9603 connected to pins 7&8. Maybe I'm missing something, but on Q9601 I only see pins 1, 5, and 6 connected, but not to L9603. What am I missing here? I have attached two more closeups of L9603 and Q9601.
      Appreciate your help!
      Attached Files

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        #4
        Re: Sharp LC-80LE632U Main Board SMD's Identification

        Nevermind R_J. I found the service manual for the LC-60LE632U and it has more board diagrams (see attached). I will take a fresh look at this once I have digested those board diagrams.
        Thanks again
        Attached Files

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          #5
          Re: Sharp LC-80LE632U Main Board SMD's Identification

          I just wanted to say thanks R_J for the help and close out this thread. Turns out that there is no short, only a low resistance (18 ohms). I was going by the beep of my meter instead of paying attention to the resistance as well as the beep.

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