Replacing LG PSU LGP32-11P with LGP32-09P?

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  • bdorset
    Member
    • Aug 2013
    • 30
    • St Vincent, Caribbean
    #1

    Replacing LG PSU LGP32-11P with LGP32-09P?

    What resistor(s) do I have to change to reduce the standby voltage from 5V to 3.5V? See attach photo. I have several brand new LGP32-09P that could be dead stock so am trying to use them to replace LGP32-11P. The amps and voltage rating are written on both supply and are the same except for the standby voltage. I also know that the arrangements of the voltages at the connectors are different but I can fix that problem. I just need to get the 5V down to 3.5V on the LGP32-09P in a professional way . Thanks for helping in advance.
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    • fbooktablet
      Member
      • Aug 2013
      • 15
      • India
      #2
      Re: Replacing LG PSU LGP32-11P with LGP32-09P?

      Change R204 to 1.5k resistor in the red rectangle..
      Attached Files

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        • bdorset
          Member
          • Aug 2013
          • 30
          • St Vincent, Caribbean
          #3
          Re: Replacing LG PSU LGP32-11P with LGP32-09P?

          Sorry it only took it down to 4.2V

            Comment

            • jetadm123
              Badcaps Legend
              • Feb 2010
              • 2169
              #4
              Re: Replacing LG PSU LGP32-11P with LGP32-09P?

              1.5k should be the correct value. The resistors used in the schematic are 1% precision resistors. Are you using a 1% resistor? Measure the value of the resistor with your meter to determine it's actual resistance.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA
                  #5
                  Re: Replacing LG PSU LGP32-11P with LGP32-09P?

                  BTW, when you bring down the Voltage from 5V to 3.5V, you need to adjust the value of R205, 206, 207 according otherwise the Opto current transfer will not be correct.
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment

                    • bdorset
                      Member
                      • Aug 2013
                      • 30
                      • St Vincent, Caribbean
                      #6
                      Re: Replacing LG PSU LGP32-11P with LGP32-09P?

                      I did used 1.5k @ 1% and I did test before I install

                        Comment

                        • bdorset
                          Member
                          • Aug 2013
                          • 30
                          • St Vincent, Caribbean
                          #7
                          Re: Replacing LG PSU LGP32-11P with LGP32-09P?

                          I think I can solve the problem if I get a schematic Diagram for EAY60868901 LGP32-10P, EAX61464001 power supply

                            Comment

                            • arenat
                              Member
                              • Nov 2015
                              • 22
                              • Argentina
                              #8
                              Re: Replacing LG PSU LGP32-11P with LGP32-09P?

                              You can´t go below 4,5v with a zener programmable , ic201 , which have a reference voltage of 2,4v .
                              Change it with an az431 1,24 v reference voltage.

                                Comment

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