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    Marantz NR-1504 No power

    Hello

    Ive got an NR-1504 which has no power the fuses check oke.
    Also Changed out IC4140 (TOP264MG) also all the diodes checkout oke
    Attached Files
    Last edited by trunks81; 07-06-2020, 01:34 PM.

    #2
    Re: Marantz NR-1504 No power

    Also ive got no 5V from the smps board to the hdmi board

    Comment


      #3
      Re: Marantz NR-1504 No power

      So what Voltages do you have on each pin of the TOP258 SMPS IC? BTW, what is the history with this receiver?
      Can you also upload the full service manual?
      Last edited by budm; 07-17-2020, 05:01 PM.
      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


        #4
        Re: Marantz NR-1504 No power

        Hello Budm

        This receiver always worked perfect and suddenly stopped working,

        Pin 1 = 2.86VDC
        Pin 2 = 1,46VDC
        Pin 3 = 5.4 VDC
        Pin 5 = 313VDC

        https://www.manualslib.com/download/...r1504-U1b.html

        Comment


          #5
          Re: Marantz NR-1504 No power

          Originally posted by trunks81 View Post
          Hello Budm

          This receiver always worked perfect and suddenly stopped working,

          Pin 1 = 2.86VDC
          Pin 2 = 1,46VDC
          Pin 3 = 5.4 VDC
          Pin 5 = 313VDC

          https://www.manualslib.com/download/...r1504-U1b.html
          OK, based on the schematic on your post #1, you need to check the Voltage between the Gate and the Source pin of MOSFET TR4140 (KMB2D0N60SA), it should be >1.5V to turn on that MOSFET, that section of circuit is for monitoring AC line Voltage, if the line Voltage is too low it will shutdown the TOP258.
          Attached Files
          Last edited by budm; 07-17-2020, 11:26 PM.
          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


            #6
            Re: Marantz NR-1504 No power

            Hello

            Got the next values

            G = 0V
            S = 0V
            D= 1.45V

            G-D = 31.1Mohm
            G-S = 0.99Mohm

            Comment


              #7
              Re: Marantz NR-1504 No power

              Originally posted by trunks81 View Post
              Hello

              Got the next values

              G = 0V
              S = 0V
              D= 1.45V

              G-D = 31.1Mohm
              G-S = 0.99Mohm
              OK, that MOSFET is not being turned on so it keeps the TOP258 in shutdown mode.
              You need to check those 1 M Ohms resistors R4141, 4142, and 4164. Also check 330K Ohms resistor R4143 resistance and check the Vdrops of that resistor.
              BTW, if you short the S and D pin of the MOSFET to simulate ON MOSFET, the TOP258 should work.
              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


                #8
                Re: Marantz NR-1504 No power

                Look like R4141 is broken getting notthing on that resistor
                Looks like those resistors are in serie can i jumper R4141 to test it
                Last edited by trunks81; 07-19-2020, 03:35 AM.

                Comment


                  #9
                  Re: Marantz NR-1504 No power

                  I have to calculate what the Gate Voltage will be if 1M resistor is bypass, it will be OK to bypass resistor if the Voltage will not be too high and damage the MOSFET, you should replace all three 1M resistor at the same time. That circuit is for brown out shutdown.
                  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


                    #10
                    Re: Marantz NR-1504 No power

                    ive ordered new resistors and i was planning to replace all three of them !
                    can you explain what you mean by brown out ?

                    Comment


                      #11
                      Re: Marantz NR-1504 No power

                      replace the small electrolytics, TOPswitch's have a habit of going boom when those caps dry up

                      Comment


                        #12
                        Re: Marantz NR-1504 No power

                        Originally posted by trunks81 View Post
                        ive ordered new resistors and i was planning to replace all three of them !
                        can you explain what you mean by brown out ?
                        AC brown out means the AC line Voltage has dropped down and will cause SMPS regulated power supply to draw more current to maintain the output Voltage.
                        https://icshvac.com/resources/featur...hvac-equipment
                        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


                          #13
                          Re: Marantz NR-1504 No power

                          After replacing those resistors and the small caps to be sure,
                          The unit is working again.
                          Everybody thnx for the help again.

                          Comment


                            #14
                            Re: Marantz NR-1504 No power

                            Thanks for the follow-up on the repair.
                            Did you take the Voltage reading of the G-S pins?
                            BTW: Is the SMPS IC TOP264 or TOP258 as shown in the schematic? More likely the old IC is good.
                            Last edited by budm; 07-20-2020, 04:29 PM.
                            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


                              #15
                              Re: Marantz NR-1504 No power

                              Hi everyone. Newbie here. I've got a 1504 that refuses to power up. Checked and fuse F4140 blew on the SMPS. Replaced it and it blew again when power on. Took out 3 fuse before I decided to ask for help. I am not adverse to soldering or using a multimeter but complete noob at electronics except for a couple of lab exercises in school. But picked up a few faulty amplifiers to learn how to fix them. Really appreciate if someone can guide me through the diagnostic process.

                              Thanks in advance.

                              Comment


                                #16
                                Re: Marantz NR-1504 No power

                                look at the TOP device - it's probably burned.
                                if it is then also replace the small electrolytic caps.

                                Comment


                                  #17
                                  Re: Marantz NR-1504 No power

                                  Originally posted by stj View Post
                                  look at the TOP device - it's probably burned.
                                  if it is then also replace the small electrolytic caps.
                                  The TOP258? I should be ok to replace that. Just a little confused about which small caps. Lemme read through the other posts a tad more perhaps.

                                  Thanks. Any chance of a detailed list of caps and resistors that I should perhaps replace altogether? Trunks81 any chance you can provide a list of the items that you replaced?
                                  Last edited by DTOH72; 02-17-2021, 09:39 AM. Reason: To be clearer in what I said

                                  Comment


                                    #18
                                    Re: Marantz NR-1504 No power

                                    replace c4152 and c4155 with high frequency caps like panasonic FR series

                                    Comment


                                      #19
                                      Re: Marantz NR-1504 No power

                                      Thanks!!! I'll go hunt down the parts. Will check on the resistors as well.

                                      Comment


                                        #20
                                        Re: Marantz NR-1504 No power

                                        Originally posted by budm View Post
                                        Thanks for the follow-up on the repair.
                                        Did you take the Voltage reading of the G-S pins?
                                        BTW: Is the SMPS IC TOP264 or TOP258 as shown in the schematic? More likely the old IC is good.
                                        I have a new NR1711 that just stopped working. No lights at all and the same SMPS board as in the NR1504. So much for revising designs with improvements.

                                        Just wanted to express my thanks for the information on this thread. There is no service manual available yet for this model that I can find but upon strip down the SMPS board is the same and I have the same results.
                                        So ordered the 5600uf caps, 1m resistors, and the 100uf 400v cap for good measure and hopefully, this will fix the issue. Got 10k hour versions so a bit of an upgrade also.

                                        To answer your question that was asked. This new latest Marantz NR1711 has the same SMPS board and the TOP258 device is used.

                                        Thanks again and I hope this will cure my issue. My unit is only 5 months old but getting any assistance from either Marantz or the dealer is just a joke here in the UK. So gotta self fix.

                                        Comment

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