Philips 32PFL3606/58

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  • nbdy
    Senior Member
    • Aug 2015
    • 162
    • Croatia
    #41
    Re: Philips 32PFL3606/58

    Changed the 817 optocupler (IC906) but the same result,now i have 1V ...

    Will try to short it ...

    The voltage on 1&2 is also 1V on IC906 ...

    When I short the pins 3 & 4 I get 5V instead of 10V ... on 50UF/50V,and on Q903 i get 5V instead of 0.7V
    Last edited by nbdy; 10-27-2019, 01:40 PM.

      Comment

      • R_J
        Badcaps Legend
        • Jun 2012
        • 9588
        • Canada
        #42
        Re: Philips 32PFL3606/58

        These voltages need to change when S/B is connected to +5v, If they do not, then it is likely the circuit is is just remaining in standby.

          Comment

          • nbdy
            Senior Member
            • Aug 2015
            • 162
            • Croatia
            #43
            Re: Philips 32PFL3606/58

            When I short the pins 3 & 4 I get 5V instead of 10V ... on 50uF/50V,and on Q903 i get 5V instead of 0.7V

            THe voltages don't change with or without S/B connected to 5V

              Comment

              • R_J
                Badcaps Legend
                • Jun 2012
                • 9588
                • Canada
                #44
                Re: Philips 32PFL3606/58

                I have no idea what you mean about Q903. there are 3 leads on that transistor which leads are you measuring 5v instead of 0.7v? If it is the BASE? That would make sence if the IC905 opto is not being turned on.
                Why don't you start by making sure the two fets, Q908 and Q907 are working first. If they don't switch. nothing else will either.
                Last edited by R_J; 10-27-2019, 01:58 PM.

                  Comment

                  • nbdy
                    Senior Member
                    • Aug 2015
                    • 162
                    • Croatia
                    #45
                    Re: Philips 32PFL3606/58

                    Sorry had a hard working week ...

                    Tested the fets,they seem ok onboard test ...

                    Should I have some specific voltages on them ???

                      Comment

                      • R_J
                        Badcaps Legend
                        • Jun 2012
                        • 9588
                        • Canada
                        #46
                        Re: Philips 32PFL3606/58

                        The fets source will be connected to ground, the drain will likely have close to +5 volts on them, when the S/B pin is connected to the 5v standby, the drain should go low.

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