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    CyberPower 1500AVR Not Charging

    Hi all. I have a CyberPower 1500AVR that has stopped charging its batteries. I replaced the batteries thinking this was the issue as the originals were several years old but the new batteries are the same. With the unit on and the batteries connected, I read 20.5 volts at the battery connectors. Not sure if that is helpful or not. I assume this is just what's left in the batteries after having the unit powered on for a day or so. There are no signs of damage on the board aside from some slight heat blackening of red and black wires just above the viper22a ic. The two caps in the photo, circled in red, both have a brown solution on their exterior which I assume is glue and not leaked from within.

    I've read other threads where some caps and the viper22a ic were replaced as a fix. Any help would be greatly appreciated and let me know what I can provide in assistance. Thanks and regards.
    Attached Files

    #2
    Re: CyberPower 1500AVR Not Charging

    Anyone? Even just a schematic of this model would be helpful. Thanks.

    Comment


      #3
      Re: CyberPower 1500AVR Not Charging

      I see some darkening of the circuit board around JP6, or is that just the way the picture was taken? I would check that area for poor solder connections, If there is heat in that area I would try replacing the two smaller electrolytics in that area, those small elec. caps. dry out but look ok as they don't leak or bulge.
      Last edited by R_J; 06-13-2020, 09:19 PM.

      Comment


        #4
        Re: CyberPower 1500AVR Not Charging

        I would recommend replacing the viper 22 and the small UF value capacitors as well at a minimum if you want to do some good measure replace all the capacitors
        9 PC LCD Monitor
        6 LCD Flat Screen TV
        30 Desk Top Switching Power Supply
        10 Battery Charger Switching Power Supply for Power Tool
        6 18v Lithium Battery Power Boards for Tool Battery Packs
        1 XBox 360 Switching Power Supply and M Board
        25 Servo Drives 220/460 3 Phase
        6 De-soldering Station Switching Power Supply 1 Power Supply
        1 Dell Mother Board
        15 Computer Power Supply
        1 HP Printer Supply & Control Board * lighting finished it *


        These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

        1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
        2 Hem Saw Computer Stack Board

        All of these had CAPs POOF
        All of the mosfet that are taken out by bad caps

        Comment


          #5
          Re: CyberPower 1500AVR Not Charging

          The only board darkening is at the viper22. Anything else is just camera phone variations. Thank you though.

          Can I assume that the caps in the vicinity of the viper22 are dedicated to the charging function? Or when you suggest replacing the small uf caps, you mean throughout the board? I think I would prefer to start with minimal replacement and work up from there if need be. Thanks for the input.

          Comment


            #6
            Re: CyberPower 1500AVR Not Charging

            Yes replace the capacitors next to the viper 22 ic chip at a minimum to see if you can get it to work correctly or not also replace the capacitors next to optic sensor as well
            Last edited by sam_sam_sam; 06-14-2020, 07:56 AM.
            9 PC LCD Monitor
            6 LCD Flat Screen TV
            30 Desk Top Switching Power Supply
            10 Battery Charger Switching Power Supply for Power Tool
            6 18v Lithium Battery Power Boards for Tool Battery Packs
            1 XBox 360 Switching Power Supply and M Board
            25 Servo Drives 220/460 3 Phase
            6 De-soldering Station Switching Power Supply 1 Power Supply
            1 Dell Mother Board
            15 Computer Power Supply
            1 HP Printer Supply & Control Board * lighting finished it *


            These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

            1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
            2 Hem Saw Computer Stack Board

            All of these had CAPs POOF
            All of the mosfet that are taken out by bad caps

            Comment


              #7
              Re: CyberPower 1500AVR Not Charging

              I suspect the viper 22 is used to supply a standby voltage only not for charging etc.
              I recommended replacing the small caps if the area was over heated, since it was just a shadow in the image they may be ok, but you never know as small caps like that usually don't have any bulging or leakage, they just dry up overtime.

              Comment


                #8
                Re: CyberPower 1500AVR Not Charging

                Originally posted by sam_sam_sam View Post
                Yes replace the capacitors next to the viper 22 ic chip at a minimum to see if you can get it to work correctly or not also replace the capacitors next to optic sensor as well
                Sorry for my lack of knowledge but which is the optic sensor on the board?

                Comment


                  #9
                  Re: CyberPower 1500AVR Not Charging

                  An optic sensor is a ic chip that has 2 pins on one end another 2 pins on the other end of it

                  I can not see it in the pictures that you have provided
                  9 PC LCD Monitor
                  6 LCD Flat Screen TV
                  30 Desk Top Switching Power Supply
                  10 Battery Charger Switching Power Supply for Power Tool
                  6 18v Lithium Battery Power Boards for Tool Battery Packs
                  1 XBox 360 Switching Power Supply and M Board
                  25 Servo Drives 220/460 3 Phase
                  6 De-soldering Station Switching Power Supply 1 Power Supply
                  1 Dell Mother Board
                  15 Computer Power Supply
                  1 HP Printer Supply & Control Board * lighting finished it *


                  These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                  1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                  2 Hem Saw Computer Stack Board

                  All of these had CAPs POOF
                  All of the mosfet that are taken out by bad caps

                  Comment


                    #10
                    Re: CyberPower 1500AVR Not Charging

                    Originally posted by sam_sam_sam View Post
                    An optic sensor is a ic chip that has 2 pins on one end another 2 pins on the other end of it

                    I can not see it in the pictures that you have provided
                    So that would be U2 in this image?
                    Attached Files

                    Comment


                      #11
                      Re: CyberPower 1500AVR Not Charging

                      Look up the part number and you will then know what type of device this is but I would recommend changing the capacitor right next to it

                      Here is the data sheet for this device



                      What is the part number for U1 next to the optic sensor
                      Last edited by sam_sam_sam; 06-18-2020, 02:58 PM.
                      9 PC LCD Monitor
                      6 LCD Flat Screen TV
                      30 Desk Top Switching Power Supply
                      10 Battery Charger Switching Power Supply for Power Tool
                      6 18v Lithium Battery Power Boards for Tool Battery Packs
                      1 XBox 360 Switching Power Supply and M Board
                      25 Servo Drives 220/460 3 Phase
                      6 De-soldering Station Switching Power Supply 1 Power Supply
                      1 Dell Mother Board
                      15 Computer Power Supply
                      1 HP Printer Supply & Control Board * lighting finished it *


                      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                      2 Hem Saw Computer Stack Board

                      All of these had CAPs POOF
                      All of the mosfet that are taken out by bad caps

                      Comment


                        #12
                        Re: CyberPower 1500AVR Not Charging

                        As far as I can tell as it's difficult to read but U1 is..
                        UTC
                        TL431K
                        WMH

                        Comment


                          #13
                          Re: CyberPower 1500AVR Not Charging

                          This is the voltage reference ic chip if you have old switching power supply board you could find one that works correctly and replace it and see if fix’s your problem or just replace the viper 22 ic chip the optic sensor ic chip and the voltage reference ic chip and the two capacitor and see if you get the switching power supply board to start working correctly again

                          Now for the optic sensor you can check to see if you have any voltage on LED side of the sensor which is around 2 to 3 volts the voltage reference ic chip depending on on ic chip could be any where from 1.5 to 2.5 volts you would have to look at the data sheet for this information
                          Last edited by sam_sam_sam; 06-19-2020, 04:01 AM.
                          9 PC LCD Monitor
                          6 LCD Flat Screen TV
                          30 Desk Top Switching Power Supply
                          10 Battery Charger Switching Power Supply for Power Tool
                          6 18v Lithium Battery Power Boards for Tool Battery Packs
                          1 XBox 360 Switching Power Supply and M Board
                          25 Servo Drives 220/460 3 Phase
                          6 De-soldering Station Switching Power Supply 1 Power Supply
                          1 Dell Mother Board
                          15 Computer Power Supply
                          1 HP Printer Supply & Control Board * lighting finished it *


                          These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                          1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                          2 Hem Saw Computer Stack Board

                          All of these had CAPs POOF
                          All of the mosfet that are taken out by bad caps

                          Comment


                            #14
                            Re: CyberPower 1500AVR Not Charging

                            Just a quick update.. I finally got all the parts needed and replaced the COSMO device, the Viper22a device and all the caps in the general area of the Viper22a. The unit now works properly and charges the batteries as it should. Thanks to everyone who helped me get through this!

                            Comment


                              #15
                              Re: CyberPower 1500AVR Not Charging

                              One more item that did not end up in the landfill

                              Good work
                              9 PC LCD Monitor
                              6 LCD Flat Screen TV
                              30 Desk Top Switching Power Supply
                              10 Battery Charger Switching Power Supply for Power Tool
                              6 18v Lithium Battery Power Boards for Tool Battery Packs
                              1 XBox 360 Switching Power Supply and M Board
                              25 Servo Drives 220/460 3 Phase
                              6 De-soldering Station Switching Power Supply 1 Power Supply
                              1 Dell Mother Board
                              15 Computer Power Supply
                              1 HP Printer Supply & Control Board * lighting finished it *


                              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                              2 Hem Saw Computer Stack Board

                              All of these had CAPs POOF
                              All of the mosfet that are taken out by bad caps

                              Comment

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