Sanyo PDP-42PF2 Stuck on StandBy

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  • VHSFI
    Member
    • Mar 2011
    • 47
    • Portugal
    #1

    Sanyo PDP-42PF2 Stuck on StandBy

    Hi,

    I have a Plasma TV Sanyo PDP-42PF2 (seems based on a samsung chassis) that is stuck on standby, it does not respond to remote control or front panel buttons, all voltages on the PSU section are down with the exception of the ones i presume are responsible for the standby circuit and connect to the control board (attached picture) this connector has the following voltages:

    Vsb - 5.23V
    Vson - 0.2mV
    AC_DET - 5,20V
    Relay - 4.10V
    D5V - 2.3mV
    DEV3 - 20.6mV

    Any help would be apreciated.
    Attached Files

    if you find these attachements useful please consider making a small donation to the site

    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Sanyo PDP-42PF2 Stuck on StandBy

      When you press the power button, do you observe any change in those voltages?
      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

        • VHSFI
          Member
          • Mar 2011
          • 47
          • Portugal
          #3
          Re: Sanyo PDP-42PF2 Stuck on StandBy

          There are no changes in the voltages when pressing the panel buttons or the remote.
          The behavior before it stopped turning on for good was that sometimes it would not turn on imediatly and it would turn it self on after a couple of minutes.

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Sanyo PDP-42PF2 Stuck on StandBy

              Can you repeat with the remote to make sure? Trying to rule out a stuck or intermittent button. Right now standby voltage is good from PSU, so it isn't going to be a bad cap at fault.
              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

                • VHSFI
                  Member
                  • Mar 2011
                  • 47
                  • Portugal
                  #5
                  Re: Sanyo PDP-42PF2 Stuck on StandBy

                  Repeated again with remote and even removed the connection to the front panel buttons so that we can rule out a bad switch, voltages remain the same, from observation all caps seem ok no bulges or similar visible problems.

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Sanyo PDP-42PF2 Stuck on StandBy

                      The fault is more than likely on the main board then.

                      This set is based on a Samsung plasma panel, but the main board, case, remote, etc. are made by Sanyo or a subcontractor for Sanyo.

                      Can we see clear close up pictures of the main board?
                      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

                        • VHSFI
                          Member
                          • Mar 2011
                          • 47
                          • Portugal
                          #7
                          Re: Sanyo PDP-42PF2 Stuck on StandBy

                          Here they are, sry about the quality if you need to know some reference or part number let me know.
                          Attached Files

                          if you find these attachements useful please consider making a small donation to the site

                            Comment

                            • p3figueiredo
                              New Member
                              • Aug 2014
                              • 1
                              • Portugal
                              #8
                              Re: Sanyo PDP-42PF2 Stuck on StandBy

                              hi, you managed to resolve the situation? I have an identical problem on identical unit

                              Originally posted by VHSFI
                              Here they are, sry about the quality if you need to know some reference or part number let me know.

                                Comment

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