help with a APC ups mod

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  • yonu
    Senior Member
    • Nov 2007
    • 138
    • United States

    #41
    Re: help with a APC ups mod

    Ok here is the label on the transformer
    Attached Files

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #42
      Re: help with a APC ups mod

      It is still charging the batteries and still talking to the computer?
      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

      • yonu
        Senior Member
        • Nov 2007
        • 138
        • United States

        #43
        Re: help with a APC ups mod

        it is still talking to computer but not charging so I will patch that trace tomorrow and see what it does not even sure when it burnt as it was charging

        yonu

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #44
          Re: help with a APC ups mod

          I think that is part of the charging circuits.
          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

          • kc8adu
            Super Moderator
            • Nov 2003
            • 8832
            • U.S.A!

            #45
            Re: help with a APC ups mod

            the older ones yes.
            these newer,cheaper ones get hot even without load.
            some are wired up as autoformers so be careful.no isolation!
            Originally posted by goontron
            IDK, you can get some decent current out of them.

            Comment

            • yonu
              Senior Member
              • Nov 2007
              • 138
              • United States

              #46
              Re: help with a APC ups mod

              Ok I patched the trace but still no charging still talks to the computer though lol

              Comment

              • yonu
                Senior Member
                • Nov 2007
                • 138
                • United States

                #47
                Re: help with a APC ups mod

                ok question I have a couple of old metal back-ups 400 that are fully working would I be better off attempting to mod one of them forgot I had them.

                Thanks,
                Yonu

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #48
                  Re: help with a APC ups mod

                  Is that the exact model 400?, I can see if we can get the diagram for it.
                  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

                  • yonu
                    Senior Member
                    • Nov 2007
                    • 138
                    • United States

                    #49
                    Re: help with a APC ups mod

                    according tot he label on it yeah here is a pic of the label

                    Thanks,
                    Yonu
                    Attached Files

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #50
                      Re: help with a APC ups mod

                      But it does not look like it has any interface for it to talk to the computer.
                      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

                      • yonu
                        Senior Member
                        • Nov 2007
                        • 138
                        • United States

                        #51
                        Re: help with a APC ups mod

                        it has a db9 I haven't hooked it up to see what data it will pass

                        Thanks,
                        yonu

                        Comment

                        • kc8adu
                          Super Moderator
                          • Nov 2003
                          • 8832
                          • U.S.A!

                          #52
                          Re: help with a APC ups mod

                          cable has non standard pinout(thanks apc!)
                          iirc there is still a site ups club that has pinout and schematics of these older units.
                          supported under windows and linux natively.
                          these i add a fan to that only runs in inverter mode.
                          so now you have a charger,monitor,and a working ups limited only by the battery you connect.

                          Comment

                          • yonu
                            Senior Member
                            • Nov 2007
                            • 138
                            • United States

                            #53
                            Re: help with a APC ups mod

                            first on the 350 I found the problem with the charging circuit apparently the TL780-15 blew out as it is only outputting 1.5volts.

                            now on the backups 400 do you happen to know what the charger can output as I have no interest in the inverter portion of the unit only the 12vdc side but I had to plow the charging circuit the first time I hook it up as I will be pulling roughly 3amps eventually 5amps,

                            Thanks,
                            Yonu

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #54
                              Re: help with a APC ups mod

                              If it uses one 12V battery then more likely to be the same setup as the 350, around 1~1.5A for charging circuit, you can look for the voltage regulator on the board around the transformer.
                              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

                              • yonu
                                Senior Member
                                • Nov 2007
                                • 138
                                • United States

                                #55
                                Re: help with a APC ups mod

                                Ok I have been going over the PCB and I have no idea on the regulator as they are all heatskinked and you can't read the labels

                                yonu

                                Comment

                                • yonu
                                  Senior Member
                                  • Nov 2007
                                  • 138
                                  • United States

                                  #56
                                  Re: help with a APC ups mod

                                  ok would it be possible to use something along the lines of what you posted earlier that but to use a relay to use an external charger instead of the built-in charger or would this cause the ups to be unable to detect the battery? the reason for this being I don't want to kill the builtin charger pulling to much current or my deep cycles by not charging them with enough current.

                                  Thanks,
                                  Yonu

                                  Originally posted by budm
                                  This is one of the simple way to do it.

                                  Comment

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #57
                                    Re: help with a APC ups mod

                                    The UPS batteries monitoring circuit that talks to the computer is connected to the terminals of the batteries, so if you connected the external charger to it, you will have to make sure that the external charger will not force feed the Voltage/current into the internal charger and cause damages. What does it show on the PC right now on the 350 when the power switch on the UPS is not on and the batteries is not connected?
                                    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

                                    • yonu
                                      Senior Member
                                      • Nov 2007
                                      • 138
                                      • United States

                                      #58
                                      Re: help with a APC ups mod

                                      nothing it will not even turn on without a connected battery I am assuming it has something todo with the blown TL780-15

                                      yonu

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #59
                                        Re: help with a APC ups mod

                                        It should communicate with the computer even when the power switch is off (if that is the way APC works, I am not sure), the charger is also always on regardless of the power switch is on or off. The blown 780-15 may also used for running the monitoring circuit beside running the charger.
                                        The monitoring works the same way as what you are trying to do, when the power is present it runs off the power supply and when AC is not present it runs off the batteries so it can keep the communication going with the PC.
                                        Last edited by budm; 07-27-2014, 03:02 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

                                        • kc8adu
                                          Super Moderator
                                          • Nov 2003
                                          • 8832
                                          • U.S.A!

                                          #60
                                          Re: help with a APC ups mod

                                          all apc i know of must have a battery to do anything.

                                          Comment

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