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KSGER STM32 T12 soldering stations

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    #16
    Re: KSGER STM32 T12 soldering stations

    That funny because the version I have which is the 2.1 if you do not have the soldering iron hook up it shows error message on it which I prefer and not some temperature

    Originally posted by redwire View Post
    Impossible to desolder the GX12 connector, I had to trash it to get the board out.
    Are you talking about the connector that the soldering iron connects to the controller board

    Because I was able to remove the one on one of mine it was a little bit difficult but not impossible to do I had to more solder on the joints a couple times and then I was able to remove it

    But come to think about I also think I had to use a temperature controlled hot air gun to help it along as well
    Last edited by sam_sam_sam; 06-30-2019, 11:57 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


      #17
      Re: KSGER STM32 T12 soldering stations

      The GX12 has 1.6mm pins and the desoldering tools I have couldn't clear the holes. No tips fit over the pins close spacing. I thought hot air would melt everything around it like the JST power connector and capacitor, buzzer?

      The temperature I am talking about is always displayed on the bottom right, even if the handle is unplugged and ERROR is up.
      When the handle is unplugged it goes to the default value from menu 4.
      I suspect the firmware 2.10 got a sneak update or they programmed the STM32 wrong, as the hardware works fine on the defective controller.
      Attached Files

      Comment


        #18
        Re: KSGER STM32 T12 soldering stations

        Originally posted by redwire View Post
        The GX12 has 1.6mm pins and the desoldering tools I have couldn't clear the holes. No tips fit over the pins close spacing. I thought hot air would melt everything around it like the JST power connector and capacitor, buzzer?
        When I remove that connector I use my Desoldiering Gun (ZD-917 ) and a temperature hot air gun and with this setup it still took some doing

        But if you have a hot air gun put a very small nose cone on air gun and point it away from the main controller board and go around in a circle until the solder melts and bang on the table to nock most of solder off it you might have to do a few times or when the solder melts pry up on the board until you clear the board
        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


          #19
          Re: KSGER STM32 T12 soldering stations

          When I pried, the pins slid right out of the GX12. They do not have collars (like in pic) to grab the epoxy, it's a cheap connector from KSGER.
          Attached Files

          Comment


            #20
            Re: KSGER STM32 T12 soldering stations

            Originally posted by redwire View Post
            could not find datasheets on the cr8642s pwm controller.
            sg6842

            Comment


              #21
              Re: KSGER STM32 T12 soldering stations

              Originally posted by redwire View Post
              When I pried, the pins slid right out of the GX12. They do not have collars (like in pic) to grab the epoxy, it's a cheap connector from KSGER.
              Did you get this soldering controller to work again or is it history
              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


                #22
                Re: KSGER STM32 T12 soldering stations

                Yes, I just bought a new GX12 connector and used flying leads to connect to it. No more direct soldering the connector to the controller PCB because the board could never take getting desoldered again without traces lifting.
                Only the heater pins need to do 3A, thicker wire there but the rest are small for the shake sensor etc.

                I see people taking the heater cartridges apart and soldering the collar/crimp connections to get rid of the bad open heater drama.

                Comment


                  #23
                  Re: KSGER STM32 T12 soldering stations

                  Originally posted by redwire View Post
                  I see people taking the heater cartridges apart and soldering the collar/crimp connections to get rid of the bad open heater drama.
                  Could you post a link where I could find this information
                  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


                    #24
                    Re: KSGER STM32 T12 soldering stations

                    I look for the Aliexpress/Banggood item on mysku.ru because the threads are very good, the Russians are crazy with their teardowns and mods. Search box on far right. You can run the webpage through google translate. If google chokes translating the entire webpage, I cut'n'paste text to get that translated. There are many soldering station reviews. Try "T12 STM32 KSGER" for example.

                    This thread has pics of opening a T12 tip and pop off the end cap, solder the wire crimps to the two collars. I also saw the collars pried apart and soldered but I can't find those pics. This fixes possible bad connections in T12 cartridges, although the socket and the tip's internals can still be bad as well.
                    If you have a bad T12 cart, no harm in taking the collars apart or melting the insulators a little bit soldering the connections.

                    also try looking for BMS or digital panel meters, spot welders etc, I find the site good for reviews.
                    Last edited by redwire; 01-07-2020, 09:42 PM.

                    Comment


                      #25
                      Re: KSGER STM32 T12 soldering stations

                      First post here.... Just came to the conclusion I ordered the wrong version pcb....

                      I bought a diy kit... Because it was bit cheaper and it came with four tips.

                      Are the some modifications I have to do? Besides grounding?

                      Comment


                        #26
                        Re: KSGER STM32 T12 soldering stations

                        There's many different versions, maybe post pics of what you have got. The enclosure grounding needs to be done, if mains powered. If a laptop adapter is powering it, other stuff needs to be done.

                        Comment


                          #27
                          Re: KSGER STM32 T12 soldering stations

                          I suspect that my PSU has a faulty SG6842 I haven't been able to find it anywhere else than on ebay, I would much rather buy one from a trusted seller, does anyone know if there is other IC's that would work instead of this one?

                          Comment


                            #28
                            Re: KSGER STM32 T12 soldering stations

                            SG6842 included in the lawsuit between Fairchild, System General Taiwan and Power Integrations.

                            Fairchild Products Found to Infringe {injunction effective June 30, 2014}
                            "The following Fairchild products are no longer offered for sale or sold in the United States. The following products are also subject to the attached court-ordered injunction. Sales of the following products outside the United States are made with the understanding, and subject to the condition, that buyers of the products will not import any of the following products into the United States, either as individual products or within their finished goods or products, or the
                            finished goods or products of others. Customers who wish to import finished goods or products into the U.S. must not purchase or use the following products in any goods or products imported into the U.S."

                            Alternates... I didn't seen anything with exact same pinout.
                            SG6845 different pinout and DIP-8 not SOIC-8.
                            FAN6604 very close pin 3-4 needs jumper, and delete any R on old pin 4.

                            What is wrong with your power supply that makes you think it's the IC?
                            Some of these T12 24VDC PSU's are junk - unstable and run hot. Capacitors way too small.

                            Comment


                              #29
                              Re: KSGER STM32 T12 soldering stations

                              Thanks!

                              The PSU can't hold a steady 24V it switches between 19-30V on the output side. The red LED on the output side keeps blinking. And when I plug in the digital control board to the PSU it turns on but keeps giving me an error. As soon as I plug in a tip it can't deliver enough power and turns the display on and off.
                              I have tested the tips to check if they are shorted but they seem fine.

                              at first, I suspected that it was the power MOSFET so I replaced that with a Vishay model instead "http://www.farnell.com/datasheets/2687488.pdf".

                              Also swapped out the 400v capacitor with and Samsung brand instead.

                              With those replaced, I still have the same problem.

                              I'm a noob, so I'm just trying to mess about with the knowledge I have.

                              Comment


                                #30
                                Re: KSGER STM32 T12 soldering stations

                                Thanks for the heads up, I was considering getting a KSGER, will definitely not get one with the internal power supply now.

                                Comment

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