Philips 42PFP5532D query mainboard

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  • llonen
    Badcaps Veteran
    • Sep 2014
    • 495
    • hampshire

    #1

    Philips 42PFP5532D query mainboard

    I have the following come through the workshop, Philips 42PFP5532D which will display either a red standby light or blue light. The power supply starts with the 5vstb and there are no error codes to report on the green diagnostic led.

    Initial investigation shows the following voltages to be present

    VG...-0.01
    VS...1.58
    12Val...0.00
    VSND_NEG...0.23
    gnd_snd...0.00
    vsnd_pos...2.26
    POWER_OK...0.12
    standby... 0.06
    12vssb...12.61
    dc_prot...0.00
    5vsw...5.34
    gnd_ssp...0.00
    8v6...0.08
    5vstb...5.29
    relay_sig...0.00
    VS-ON... 0.00
    d5v...0.26
    Va...0.50

    VS and VA are close to zero volts and there is no difference with the x and y sus unplugged.

    The blue start light front panel responds to touching the side buttons but no other function and or sound is present. The 7332 LF package appears to run hot.

    Initial testing of the X and Y boards unplugged indicate no shorted components, there appear to be no shorts along the buffer panel. From initial testing there appears to be no shorts with the major semi conductors on the PSU board and the fuses are all intact.
  • dskall
    Badcaps Legend
    • Oct 2016
    • 2905
    • usa

    #2
    Re: Philips 42PFP5532D query mainboard

    Do you get voltages briefly when trying to power on? Tried forcing on power supply?
    I assume no responsibility for any stupid suggestions I might post.

    Comment

    • llonen
      Badcaps Veteran
      • Sep 2014
      • 495
      • hampshire

      #3
      Re: Philips 42PFP5532D query mainboard

      There are no other voltages briefly present at start up other than listed, the supply does not go onto power up past the standby voltage, there are two relays on the board that don't energise. The psu is I2C bus controlled and requires a functional main board to start I believe.

      Comment

      • dskall
        Badcaps Legend
        • Oct 2016
        • 2905
        • usa

        #4
        Re: Philips 42PFP5532D query mainboard

        You should be able to force power board on by jumping 5v to maybe standby and VS-ON with cable disconnected from main board.
        I assume no responsibility for any stupid suggestions I might post.

        Comment

        • llonen
          Badcaps Veteran
          • Sep 2014
          • 495
          • hampshire

          #5
          Re: Philips 42PFP5532D query mainboard

          I don't see a VS-on,
          Attached Files

          Comment

          • dskall
            Badcaps Legend
            • Oct 2016
            • 2905
            • usa

            #6
            Re: Philips 42PFP5532D query mainboard

            VG...-0.01
            VS...1.58
            12Val...0.00
            VSND_NEG...0.23
            gnd_snd...0.00
            vsnd_pos...2.26
            POWER_OK...0.12
            standby... 0.06
            12vssb...12.61
            dc_prot...0.00
            5vsw...5.34
            gnd_ssp...0.00
            8v6...0.08
            5vstb...5.29
            relay_sig...0.00
            VS-ON... 0.00
            d5v...0.26
            Va...0.50
            I assume no responsibility for any stupid suggestions I might post.

            Comment

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