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Hitachi 42hds69 pad repair or jumper help for ps

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    Hitachi 42hds69 pad repair or jumper help for ps

    Hi. Can anyone help me with locating where to run a jumper wire to from these damaged pads on this power supply board by looking at these pics. If not its part number is mpf7428 ps in case anyone can find the schematics. The pads are for a transistor(Q701) I was removing to test for a short and my solder sucker was clogged and I stupidly left the iron on it too long and raised the temp a little wondering what was going on. So please if anyone can help it'd be greatly appreciated.
    Attached Files

    #2
    Re: Hitachi 42hds69 pad repair or jumper help for ps

    Just scrape away a bit of the green paint that covers the copper trace if you need to but you could just run a wire fromthe transistor lead to the solder on that large trace. the other two will likely be ok once you solder the leads to what left of the trace.
    Don't use a solder sucker on these, use solder wick.
    Are you sure there is a problem with the power supply? My first guess on this model would be upper buffer board
    Attached Files
    Last edited by R_J; 07-18-2018, 09:22 PM.

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      #3
      Re: Hitachi 42hds69 pad repair or jumper help for ps

      Yeah. I'm pretty sure it's the power supply. I'm not getting a standby LED nor standby voltage.

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        #4
        Re: Hitachi 42hds69 pad repair or jumper help for ps

        Originally posted by R_J View Post
        Just scrape away a bit of the green paint that covers the copper trace if you need to but you could just run a wire fromthe transistor lead to the solder on that large trace. the other two will likely be ok once you solder the leads to what left of the trace.
        Don't use a solder sucker on these, use solder wick.
        Are you sure there is a problem with the power supply? My first guess on this model would be upper buffer board
        +10. As long as you remember where each pin goes for which hole.

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          #5
          Re: Hitachi 42hds69 pad repair or jumper help for ps

          Just by chance is the Main Power button on? it is located under the front bezel and often gets overlooked
          Attached Files
          Last edited by R_J; 07-19-2018, 09:06 AM.

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