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Philips 42PFL5432d/37

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    #1

    Philips 42PFL5432d/37

    Hello all, I hope your 2012 has started off better than mine. I fell ill with strep and my tv decided to go belly-up in the same day. Since I'm stuck at home anyway (still contagious for a while yet), repairing the tv has become a project.

    Basically, it will function normally for a few seconds after being turned on, albeit with an odd noise. It sounds like a faint buzz and/or grind.

    After that, the power led will change from green to amber, the screen goes blank, and the buzz stops. In it's stead, a high-pitched humming sound will occur. The humming will continue and increase in frequency until you can no longer hear it.

    This seems to me like a power supply issue of some sort, but I'm not exactly sure where to start testing.

    By my untrained eye, there does not appear to be any visible damage to the power supply circuitry.

    Any assistance is greatly appreciated.

    Thank you,

    -cs
    Tags: None
    #2
    Re: Philips 42PFL5432d/37

    Originally posted by another7driver View Post

    This seems to me like a power supply issue of some sort, but I'm not exactly sure where to start testing.
    Without pictures neither are we!

    A detailed photo of the rear of the TV with the cover off will be a good start to getting the help you need, accompanied by a closeup of the power supply board (the one with the big capacitor on it)

    Top down well lit photos of as close to 2000x2000 resolution are what we need. Attach them with the "Manage Attachments" button below the submit reply button.

    Make sure power is disconnected and don't touch any components due to the chance that the main capacitor may still hold a nasty charge of up to 340 volts or so.

    Hope you make a speedy recovery, and look forward to seeing your pics so we can help diagnose your fault. (The noise you describe does indeed suggest it is the power supply unit )

    Jim

    Comment

      #3
      Re: Philips 42PFL5432d/37

      The usual process is to take a picture of the back of the TV (with the back removed). This gives us an over-all layout of the set. Next, take a sharp, well lit picture of the power supply. This one should be close to 2000 x 2000 pixels without going over. Often the connector for the cable between the main board and power supply has a legend indicating the function of each pin. A picture of that would be most helpful. From there we will probably suggest tests to make.

      The service manual is available from Elektrotanya.

      PlainBill
      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

      Comment

        #4
        Re: Philips 42PFL5432d/37

        Hope these are enough...
        Attached Files

        Comment

          #5
          Re: Philips 42PFL5432d/37

          I do see a bulged cap down in the lower left of your 4th photo. A recap with Panasonic FR, FM or FC series caps would be a good start. A shot of the entire power supply (from top down) would also be good.

          Comment

            #6
            Re: Philips 42PFL5432d/37

            Don't know how I managed to miss uploading that one.. Time to blame it on the meds haha
            Attached Files

            Comment

              #7
              Re: Philips 42PFL5432d/37

              I had a power supply with two bad capacitors - it made the same increasing in pitch whining sound that yours does. Replacing the two caps (which I had on hand - Panasonic FC) fixed the problem immediately.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

                #8
                Re: Philips 42PFL5432d/37

                Alright, looks like I'll set about replacing the fallen soldier.

                May have the cap available at work, will find out tomorrow. If not, I'll order one.

                Should I plan (and order) to replace several on the board, or just the one that is bulging?

                Comment

                  #9
                  Re: Philips 42PFL5432d/37

                  Originally posted by another7driver View Post
                  Should I plan (and order) to replace several on the board, or just the one that is bulging?
                  Here is my standard answer (regulars here can skip the URL) especially since Capxon makes poor quality caps.

                  https://www.badcaps.net/forum/showpo...84&postcount=3
                  Last edited by retiredcaps; 01-04-2012, 03:53 PM.
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                  We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

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                  Comment

                    #10
                    Re: Philips 42PFL5432d/37

                    Originally posted by another7driver View Post
                    Alright, looks like I'll set about replacing the fallen soldier.

                    May have the cap available at work, will find out tomorrow. If not, I'll order one.

                    Should I plan (and order) to replace several on the board, or just the one that is bulging?
                    Just make sure you get a good low-ESR capacitor. You could replace it with a generic, but it'll probably go bad in another month - a good low-ESR capacitor should last another 5-10 years.
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                      #11
                      Re: Philips 42PFL5432d/37

                      Parts are on order, I'll keep you all updated.

                      Comment

                        #12
                        Re: Philips 42PFL5432d/37

                        Worked like a charm, now running perfectly. Also, I'm a day or two from being completely healthy again as well.

                        Thank you all!

                        Comment

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