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    Ryobi cordless driver drill cbd-120vr

    I am looking for the two resistor values located on the small board inside the battery charging stand.

    Please help if you know

    thanks

    #2
    Re: Ryobi cordless driver drill cbd-120vr

    Please post some pictures of this device
    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


      #3
      Re: Ryobi cordless driver drill cbd-120vr





      Attached Files

      Comment


        #4
        Re: Ryobi cordless driver drill cbd-120vr

        please find attached relevant pictures for RYOBI CORDLESS DRIVER DRILL

        Comment


          #5
          Re: Ryobi cordless driver drill cbd-120vr

          I personally would recommend modifying the charging current and not using a resistor to do it

          I would use a LM317 in the current mode and set it 500 to maybe 750 milliamperes at the most

          If you have the battery on charger all the time then I would recommend not going more than 300 milliamperes at the most probably be better 150 milliamperes would be better choice

          Or use a readymade current controller board and just remove the power jack and wire it to current controller board

          Ok one resistor is for the led and the fatter one is the current resistor for charging the battery

          One note you need to check the diode and make sure it still works correctly

          When I use to use nicad battery pack and had charging boards like this

          I would make a little board with a LM317 and set it up to 150 milliamperes and have more than one battery pack and

          I would be rocking and rolling again

          I would have a LED that would light when the battery was on the charger and basically when the battery was fully charged it barely be light or you would not see it light anymore

          How you set this to work correctly and let you know your battery is fully charged you put the LED light with resistor in series LED and put this in series with the regulator input pin and the output pin side or it is the adjust pin I do not remember which pin you have to use output/adjust pin which pin to use but it is easy to figure out which pin to use is when the battery is on the charger it should be lighting up the resistor should 1k ohm for the LED light bulb

          The current resistor for the output pin to adjustment pin there is a forum on the data sheet so you can figure out what value you need to use for a certain amount of current
          Last edited by sam_sam_sam; 02-06-2021, 08:58 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


            #6
            Re: Ryobi cordless driver drill cbd-120vr

            THANKS a lot for your interest, the diode tests ok.
            The fat resistor is reading 3.5 ohms.

            Comment


              #7
              Re: Ryobi cordless driver drill cbd-120vr

              that's terrible.
              what does the battery say on it?

              i'm thinking a proper charge circuit is needed.

              Comment


                #8
                Re: Ryobi cordless driver drill cbd-120vr

                Battery says 12v

                Comment


                  #9
                  Re: Ryobi cordless driver drill cbd-120vr

                  nothing else?
                  i want to know the chemistry.
                  lithium, NiMH, NiCd etc.

                  different chemistry needs different charging circuits

                  Comment


                    #10
                    Re: Ryobi cordless driver drill cbd-120vr

                    Originally posted by stj View Post
                    nothing else?
                    i want to know the chemistry.
                    lithium, NiMH, NiCd etc.

                    different chemistry needs different charging circuits

                    It is a nicad battery pack I use to have there 9.6 volt battery pack way back when Sears way back when had this style as well

                    I would hope that no manufacturer in there right mind would use this method for charging lithium batteries of any kind you are just asking for problems that would be a big mistake if you do not at least have a protection board at a minimum
                    Last edited by sam_sam_sam; 02-06-2021, 09:20 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


                      #11
                      Re: Ryobi cordless driver drill cbd-120vr

                      well i'd open the pack and count the cells - dont trust the label.
                      then go on ali and find an intelligent charging module.
                      it's worth opening the pack anyway to check they arent "flowered" all over the casing!

                      if it only has 8cells then you can get a nice charger module that runs from 5v
                      however, if the diode and fat resistor are o.k. then the battery or drill may be the problem.
                      or even the psu
                      Last edited by stj; 02-06-2021, 09:10 AM.

                      Comment


                        #12
                        Re: Ryobi cordless driver drill cbd-120vr

                        Originally posted by stj View Post
                        then go on ali and find an intelligent charging module.
                        I have tried these module before and I was not impressed with the performance results I was getting with them

                        The biggest issue that I had with them is that they tend to under charge them and because of this running time was crap

                        Unless you know where to go and get good quality one that charge the battery correctly I would interested in buying some because I still use nicad for some applications because of voltage limitations

                        And do not cost an arm and a leg for the cost of them
                        Last edited by sam_sam_sam; 02-06-2021, 09:31 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


                          #13
                          Re: Ryobi cordless driver drill cbd-120vr

                          i have one of these: it gets the job done.
                          https://www.aliexpress.com/item/4000283329984.html

                          Comment


                            #14
                            Re: Ryobi cordless driver drill cbd-120vr

                            Originally posted by stj View Post
                            i have one of these: it gets the job done.
                            https://www.aliexpress.com/item/4000283329984.html
                            Thanks for the website link
                            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


                              #15
                              Re: Ryobi cordless driver drill cbd-120vr

                              No I have not because I do not any of there tools I am sorry I can not help you with this
                              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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