Announcement

Collapse
No announcement yet.

chip orientation

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    chip orientation

    Do I have this chip in correct, I don't see a dot on it.
    Attached Files

    #2
    Re: chip orientation

    It looks correct if that's a 1 on the board next to the pin
    Attached Files

    Comment


      #3
      Re: chip orientation

      I was hoping it was wrong because the other 2 look right and I smoked a resistor. I replaced 3 transistors they all look correct. They can go in either way right?
      Attached Files

      Comment


        #4
        Re: chip orientation

        That ncp1608 is the pfc ic, it likely drives a mosfet that is shorted, What's the board used in? Is this a Sharp power supply board by chance?
        If it is, and that R7900 is blown, IC7903 shorted.
        As for transistors, they only go in one way, the correct way.
        Last edited by R_J; 03-13-2019, 09:49 AM.

        Comment


          #5
          Re: chip orientation

          Yes Sharp DPS-162KP. I did replace 7903 and joints look good but it fried also now that I looked at it.
          Attached Files

          Comment


            #6
            Re: chip orientation

            Originally posted by R_J View Post
            That ncp1608 is the pfc ic, it likely drives a mosfet that is shorted, What's the board used in? Is this a Sharp power supply board by chance?
            If it is, and that R7900 is blown, IC7903 shorted.
            As for transistors, they only go in one way, the correct way.
            Replace ic and mosfet, plugged in and fried it again....ugh!

            Comment


              #7
              Re: chip orientation

              Which ic are you talking about? What mosfet are you refering to?
              the ic in post #1 has nothing to do with the ic pictured in post #5
              What number are you replacing IC7903 with? IC 7903 is the standby controler ic. It has nothing to do with any mosfets,

              The blown resistor in post #3 picture 3 is the fuse resistor for the standby ic IC7903

              I replaced 3 transistors they all look correct. They can go in either way right?
              You have likely caused more problems by installing parts backwards
              Last edited by R_J; 03-20-2019, 06:44 PM.

              Comment


                #8
                Re: chip orientation

                Ic7903 was replaced and resistor that was blown. Transistors only can mount up one way. I replaced everything in this kit. https://www.shopjimmy.com/sharp-runt...repair-kit.htm

                Comment


                  #9
                  Re: chip orientation

                  Originally posted by Hornnumb2 View Post
                  Replace ic and mosfet, plugged in and fried it again....ugh!
                  This tells me nothing.

                  Comment

                  Working...
                  X