Philips 23PFL5522D/12 PSU problems

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  • sparkydz
    Member
    • Jun 2013
    • 19
    • France

    #21
    Re: Philips 23PFL5522D/12 PSU problems

    Well I've replaced all the caps (Panasonic FM or FR), but PSU still buzzing and cycling. I guess I'll try looking for a problem further upstream. Not easy without a service manual or even a circuit diagram, but I'll have a go and post the results.

    -- Mike

    Comment

    • sparkydz
      Member
      • Jun 2013
      • 19
      • France

      #22
      Re: Philips 23PFL5522D/12 PSU problems

      Finally got the set working again, after it sitting in a corner gathering dust. A schottky diode had blown, maybe at the same time as the zener. It was an SB360 and luckily I found a similar one in an old PSU - SB340. I think the 40V should be OK here, but I'll order a couple of SB360 next time I've got a bigger order to do.

      Now to see if I can fix the remote control, although I think the spilt orange juice was probably terminal.

      Thanks for a great site,
      Mike

      Comment

      • sparkydz
        Member
        • Jun 2013
        • 19
        • France

        #23
        Re: Philips 23PFL5522D/12 PSU problems

        Update on the remote:
        Seems the orange juice must have eaten away a track _under_ the SMD controller chip, so one row of the keyboard matrix was out - soldered in a bit of very fine transformer wire to replace the track and bingo! Nice to have things working again...

        Mike

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        • Ltank
          Badcaps Veteran
          • Jun 2013
          • 776
          • USA

          #24
          Re: Philips 23PFL5522D/12 PSU problems

          Transformer buzzing can be caused by loose laminations in the transformer or the switching circuit is oscillating at the wrong frequency

          Comment

          • hermanus
            New Member
            • Oct 2015
            • 1
            • spain

            #25
            Re: Philips 23PFL5522D/12 PSU problems

            Hi There
            I have the same PSU board,
            Somebody changed the Caps But i think they have thewrong values
            can sombody tell me the listing of the caps because I have the drawing but without the values

            Comment

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