usp440m-42lp psu

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • paulstef
    Badcaps Veteran
    • Dec 2013
    • 724
    • Canada

    #41
    Re: usp440m-42lp psu

    Perfect. What's the voltage at the points indicated in the picture?
    Attached Files

    Comment

    • joehezzer
      Badcaps Veteran
      • Jul 2012
      • 251
      • England

      #42
      Re: usp440m-42lp psu

      Originally posted by paulstef
      Perfect. What's the voltage at the points indicated in the picture?
      Bouncing around 00.3 to 00.7 that looks a bit suss

      Comment

      • paulstef
        Badcaps Veteran
        • Dec 2013
        • 724
        • Canada

        #43
        Re: usp440m-42lp psu

        ????

        Are you sure the fuse is ok?

        You measure AC, right?

        Comment

        • joehezzer
          Badcaps Veteran
          • Jul 2012
          • 251
          • England

          #44
          Re: usp440m-42lp psu

          i did a continuity test on it, i took the fuse out of its holder

          Comment

          • paulstef
            Badcaps Veteran
            • Dec 2013
            • 724
            • Canada

            #45
            Re: usp440m-42lp psu

            Check input voltage directly at the connector. Sure it's there?

            Comment

            • joehezzer
              Badcaps Veteran
              • Jul 2012
              • 251
              • England

              #46
              Re: usp440m-42lp psu

              Nothing. Extension lead is fine

              Comment

              • paulstef
                Badcaps Veteran
                • Dec 2013
                • 724
                • Canada

                #47
                Re: usp440m-42lp psu

                Well, then the problem is somewhere else. I don't have the TV in front of me, just the board. Check the connector/cable etc.

                Comment

                • paulstef
                  Badcaps Veteran
                  • Dec 2013
                  • 724
                  • Canada

                  #48
                  Re: usp440m-42lp psu

                  That's very strange. Is your multimeter working? What if you measure the AC directly at the wall outlet?

                  Comment

                  • joehezzer
                    Badcaps Veteran
                    • Jul 2012
                    • 251
                    • England

                    #49
                    Re: usp440m-42lp psu

                    Originally posted by paulstef
                    That's very strange. Is your multimeter working? What if you measure the AC directly at the wall outlet?
                    well the extension lead is working as i have just tried my belt sander on it. just going to have a look at a faulty rocker switch and the bit where the kettle lead goes in

                    Comment

                    • paulstef
                      Badcaps Veteran
                      • Dec 2013
                      • 724
                      • Canada

                      #50
                      Re: usp440m-42lp psu

                      There is also an EMI filter directly connected to the AC inlet of the TV. Maybe it's faulty. You could measure the output voltage at its terminals.
                      Attached Files

                      Comment

                      • joehezzer
                        Badcaps Veteran
                        • Jul 2012
                        • 251
                        • England

                        #51
                        Re: usp440m-42lp psu

                        Originally posted by paulstef
                        There is also an EMI filter directly connected to the AC inlet of the TV. Maybe it's faulty. You could measure the output voltage at its terminals.
                        yeah just looking at that now

                        Comment

                        • joehezzer
                          Badcaps Veteran
                          • Jul 2012
                          • 251
                          • England

                          #52
                          Re: usp440m-42lp psu

                          gonna have to give it a break tonite, will go over these bits tomorrow.

                          Comment

                          • paulstef
                            Badcaps Veteran
                            • Dec 2013
                            • 724
                            • Canada

                            #53
                            Re: usp440m-42lp psu

                            ok. good luck. Shouldn't be hard.

                            Comment

                            • joehezzer
                              Badcaps Veteran
                              • Jul 2012
                              • 251
                              • England

                              #54
                              Re: usp440m-42lp psu

                              Originally posted by paulstef
                              There is also an EMI filter directly connected to the AC inlet of the TV. Maybe it's faulty. You could measure the output voltage at its terminals.
                              i have not tested it yet but it does smell a little

                              Comment

                              • paulstef
                                Badcaps Veteran
                                • Dec 2013
                                • 724
                                • Canada

                                #55
                                Re: usp440m-42lp psu

                                Ok, keep us posted about your findings. There is not much left to check.

                                In the meantime I will spend another evening on my board

                                Comment

                                • joehezzer
                                  Badcaps Veteran
                                  • Jul 2012
                                  • 251
                                  • England

                                  #56
                                  Re: usp440m-42lp psu

                                  Originally posted by paulstef
                                  Ok, keep us posted about your findings. There is not much left to check.

                                  In the meantime I will spend another evening on my board


                                  will do

                                  Comment

                                  • paulstef
                                    Badcaps Veteran
                                    • Dec 2013
                                    • 724
                                    • Canada

                                    #57
                                    Re: usp440m-42lp psu

                                    How did this work out for you? Was it the Filter?

                                    Comment

                                    • joehezzer
                                      Badcaps Veteran
                                      • Jul 2012
                                      • 251
                                      • England

                                      #58
                                      Re: usp440m-42lp psu

                                      Originally posted by paulstef
                                      How did this work out for you? Was it the Filter?
                                      hi paul not had chance to test it yet, hopefully tomorrow

                                      Comment

                                      • joehezzer
                                        Badcaps Veteran
                                        • Jul 2012
                                        • 251
                                        • England

                                        #59
                                        Re: usp440m-42lp psu

                                        Originally posted by paulstef
                                        How did this work out for you? Was it the Filter?
                                        ok so i just tested the filter there is no voltage at all at the filter, so have a new filter on order.

                                        Comment

                                        • paulstef
                                          Badcaps Veteran
                                          • Dec 2013
                                          • 724
                                          • Canada

                                          #60
                                          Re: usp440m-42lp psu

                                          Great. Good luck!

                                          Comment

                                          Related Topics

                                          Collapse

                                          • dicky96
                                            Need to buy buck regulator MP2329CGG but struggling to find supplier
                                            by dicky96
                                            Hi guys
                                            I need one of these MP2329CGG for a repair job. It's a 24V 6.5A buck converter. But I have not been able to find a supplier who has that component.

                                            Actually I would buy a few as I always think if I found one faulty already I will probably find more in the future

                                            I had one supplier on Aliexpress who gave me a price $2 each, but I have been waiting some days since I asked for shipping price and they don't reply

                                            Does anyone know where I can buy that part in small quantity (let's say 5 of them), or any equivalent I could use? it supplies the Standby...
                                            03-05-2021, 08:44 AM
                                          • Faileng
                                            Struggling with a soldering job, need help.
                                            by Faileng
                                            Hello, although I've never been formally taught soldering techniques, etc... I've not really run into too much trouble soldering, with the exception of this job...

                                            I've got a supposed blown transistor on my fuel pump on my car and I'm trying to replace it. It's a gel encased circuit booard with very fine connections. Please see photo uploaded.

                                            I've cleaned up the area that I'm working on with alcohol scraped off the wires, etc..

                                            I cannot get any solder to now stick any of the connections, I've used various grades of solder and flux combination, nothing...
                                            02-06-2020, 02:07 PM
                                          • yasin4286
                                            Alienware 17 R4 (6th gen) bios problem
                                            by yasin4286
                                            Hello friends. I have been struggling with this device for several months. The problem is that the laptop is 6th generation and every BIOS I find is 7th generation. In the BIOS settings, it says Kaby Lake in the integrated graphics. The graphics drivers are not installed properly in Windows either. I would be grateful if any of my friends could help me finish this laptop.

                                            Model : Alienware 17 R4 (6th gen)
                                            Motherboard : LA-D753P rev 1.0(A00)
                                            CPU: 6820HK​
                                            Yesterday, 01:28 PM
                                          • TimScrawn
                                            A2337 820-02016-A Failing DFU mode
                                            by TimScrawn
                                            I have a very strange issue here. Customer was using Mac one day and stopped working when they went to use it the next day. I plugged it into my amp meter and I got 5v at 0.10amp.

                                            Checked all rails:

                                            PPBUS_AON: 12,3 V
                                            PP3V8: 3.79v
                                            PP3v3_AON: 3.29v
                                            PPDCIN_AON_CHGR_R: 5 V

                                            The very strange part of the issue is that I left the Mac on one side for a day, came back to it and reconnected everything. Connected the DFU cable to a WS machine and connected the charger. The Mac then booted to the login screen? I then logged in and because I was after...
                                            06-29-2025, 10:27 AM
                                          • Doesronnieevenlift
                                            Help a noob! Wson8 Pogo/Needle Adapters to read/Write
                                            by Doesronnieevenlift
                                            Hi all,

                                            I had recently tried to reflash the bios on a dell latittude that has a Wson8 Chip however to no avail.

                                            My question is, Has anyone had much success using the Pogo/Needle adapters to read and write bios without removing the chip from the main board?

                                            I seem to struggling with the solder process wofh my reflow station and currently have 4 machines waiting for a bios mod/reflash.

                                            For context I have just ordered a EZP2019 SPI flash so this is what I would be using alongside the Pogo Adapter.

                                            Apologies if this is the wrong subcategory....
                                            06-22-2025, 04:51 AM
                                          • Loading...
                                          • No more items.
                                          Working...