Announcement

Collapse

Forum Rules *ALL NEW MEMBERS, PLEASE READ!! UPDATED!!*

First and foremost, Welcome to the Badcaps Capacitor Search Engine & Forums!

New members that have activated their accounts have limited access to certain features of the site until established. Members with zero posts have no access to the private messaging system. Also, members with zero posts may not edit certain profile attributes, such as signatures. New members also may not create new threads. However, new members with zero posts have full access to all technical information contained on this forum, and that also includes attachments (images and files that other members have uploaded), and new members that have activated their accounts are free to post replies to existing threads. If you wish to create a new thread, the fix is simple! All you need is ONE post to be able to have full unrestricted access, and that can be simply posting an introduction of yourself or say hello in THIS THREAD. This may seem a little strange, but it helps keep spam and abuse curved. Please note, that it may take up to one hour from your first post for the limits to be removed. If you make a post and don't immediately see the restrictions gone, be patient. The promotion system updates every hour.

Please complete your profile after making your first post, with your name, locale, and other info. It's nice to know members on a first name basis, and know where they're from. Makes for a much friendlier environment!

Posting rules for this forum will be STRICTLY enforced by myself as the owner/administrator, and my moderator crew.

Badcaps.net IS A BUSINESS!!! If you are a servicer, service center, or vendor of any kind in the computer/capacitor industry, you are NOT permitted to advertise, link, promote, or plug your business on this forum in ANY way! NO EXCEPTIONS!! This includes asking for "donations" in exchange for BIOS passwords or tech advice for anything! If I see you doing that, your post will be edited or deleted, and you warned. If it happens again, you will be banned. The only exceptions are the references to the companies quoted in the FAQ which the administration have added for the convenience of those around the world who have difficulty to source caps for their repair.

This also includes using this forum's private message system to solicit business. Members, if you receive a PM from anyone offering repair services or components, please alert me immediately! Myself or any of my moderators, will never private message a user soliciting business, for Badcaps.net, or any other servicer/vendor. If you PM me about repairing your device, I will reply and take care of you, however, I will not message you first.

------------------------------------

Posting rules:

This forum was created to be a technical support forum primarily for the do-it-yourselfers who choose to repair their own boards. Any and all technical questions are welcome!

1) Please use the SEARCH feature!! Your question may have been answered in another thread! Please search first and see if it has!

2) When posting a technical question, be as detailed as possible in your thread. The more information we have about your specific problem, the better we can answer your question.

3) Please use COMPLETE sentences, punctuation, and grammar! Nobody is perfect, hence, a spelling error on occasion is no biggie. However, posts/threads that are unreadable will be deleted. This includes any and all forms of 'ebonics', leet, chatroom jargon, and 'text message' shorthand and slang. This forum is not a chatroom/text message, please use full words and complete sentences.

4) Keep discussion on topic!! DO NOT HIJACK THREADS! It's easy to do (I've done it myself a few times...) Lets try to keep it down to a minimal!! If you have something really off topic, that's what the lounge is for!

5) Keep things civil! There will be no tolerance for flaming, bashing, hateful remarks, racial remarks, adult material of ANY kind, and so on.

6) THE LOUNGE RULES! The lounge is a place for off topic chit-chat! If you post something that might be considered questionable or something you don't want kids to see, or something you can't view at work/school, etc, please label that thread *NWS* or NOT WORK SAFE in the thread title as a warning. The Lounge is NOT moderated, anything is welcome... Feel free to post rants, jokes, cars, hot women (remember the NWS warning in the title), or just about anything within reason. It's an open forum! Please refrain from participating in political topics if you have thin skin, they can get heated sometimes!! Remember that we have members here from all over the world, with many different views and cultures. Political debates can turn really ugly, and really fast, and if they degrade to personal attacks and useless banter/bashing, moderator action will ensue. I want this forum to be a safe haven for technical discussions from all walks of life, so lets keep off topic discussions civil and friendly.

7) Spamming and spammers will NOT be tolerated or accepted in any way, shape, or form! Spam bots are instantly and permanently banned, and their threads deleted! The mod crew is really quick to zap spammers, we typically pop them before they even get to post. This also includes regular members as well. be courteous and not post spam. This includes links to off-site information that's not relevant to the thread at hand. Do not plug other websites, forums, or businesses in your signatures. You may do so in a thread if the off-site link you're posting is relevant to the topic, but otherwise, don't do it. If you see a thread which clearly a spam bot posting that we have not removed yet, DO NOT click any links in it!! Simply click the 'report bad post' button, and it'll be taken care of, usually within minutes.

8) Account removals & closures: Since no personal information is given in the creation of your Badcaps.net Forum account, requests to remove and/or delete accounts will be declined. Any requests for removal of threads & posts you created will also be declined. The reason is the missing posts can/will leave threads incomplete and fragmented. For the threads to be of help to others later on, information can't and won't be missing. However, if you inadvertently posted personal identifiable information in a post (such as an email address, real name, or phone number), please contact a staff member. In those cases, the post may be edited or removed, at the staff members discretion.

That's about it for the rules, the setup here is pretty loose. However, if you're caught violating any of the rules above, here's what will happen:

First offense: Warning by me or a moderator
Second offense: Banning for 1 day
Third offense: Banning for 3 days
Fourth offense: Banned permanently.

If you do something really dumb, or are just a troll, I will skip the warning and the temporary banning, and ban you permanently!

The rules are pretty cut and dry... However, if you have any questions about this policy, feel free to contact me.
See more
See less

KSGER STM32 T12 soldering stations

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    KSGER STM32 T12 soldering stations

    Picked up a soldering station with H/W Ver 2.1S and S/W 2.10 from KSGER store on Ali. Build quality is very good, price was high.

    The handle has a NTC thermistor inside that doesn't seem to do anything.
    What do your station do?

    Bottom right corner of OLED shows a temperature 40°C all the time. Even with a handle plugged in or not, or shorting the "N" pin to GND.

    Menu 04. Cold End Adj. -> NTC-> 40°C {dial in}

    The temperature I dial-in is always displayed.

    I drew a full schematic of the controller board and 24VDC power supply.
    The NTC input is just a pullup resistor going to the MCU input. So the hardware seems fine, it must be crappy firmware?


    RTC battery was DOA and a new one also died quickly. Took out the stupid resistor R10 from this video: https://www.youtube.com/watch?v=B-xWhPcr6jk
    Attached Files

    #2
    Re: KSGER STM32 T12 soldering stations

    Thanks for sharing it I am going to get one in couple of weeks I am going to remove the switch and put a non conducting cardboard ( under the switch ) that is used battery pack so I do not have that problem
    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: KSGER STM32 T12 soldering stations

      Here's the schematic I drew of the KSGER soldering station 24V PSU for service and repair.
      Soldering Power V2.04 and pig with bull horns icon on the silkscreen.
      KSGER 96W 24V 5A Electric Power Supply Unit For STM32 STC OLED T12 Digital DIY Soldering Station Controller.

      It has some clearance mistakes running +HV trace underneath heatsink and a thin PE ground trace, no connection to the chassis
      The TL431 is set to over 25VDC output and it has no bias resistor. The snubber cap is pretty cheap. Could not find datasheets on the CR8642S PWM controller.
      Earlier version PSU's like V2.01, V2.02, V2.03 are the same but no pads for a mystery DPAK part or different DC connector.
      Attached Files

      Comment


        #4
        Re: KSGER STM32 T12 soldering stations

        are the heatsinks insulated? the semi's are.

        it's a good design - caps well away from the sinks - unlike japanese shit i used to fix.

        Comment


          #5
          Re: KSGER STM32 T12 soldering stations

          Semi's are isolated TO-220 parts (fullpack), but the heatsink mounting pin pads have very little clearance to the fills. So the path is PCB trace->heatsink->mounting pads-> nearby pours.
          I'll put Kapton tape over the two traces if I can fit that in.

          The older version 24VDC PSU (left) is apparently not very good. Primary capacitors are low value 2x22uF, 1A diodes instead of 8A bridge, no 3A fuse but a 1R resistor in heatshrink. The Schottky rectifier runs 112C at steady 3A. Quicko sells them too.

          But it has to put out 3A for short periods.
          Attached Files

          Comment


            #6
            Re: KSGER STM32 T12 soldering stations

            I have to wonder how long this switching power supply would last if you ran it 5 or 6 hours a day 5 days a week
            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: KSGER STM32 T12 soldering stations

              It's a good power supply. Just the two issues with 100V snubber cap and heatsink on the HV pcb trace, and it takes a few seconds to power up which is strange. KSGER sells it with their better soldering stations.
              Actually you don't need 3A for very long, just bursts.

              There are a few other T12 soldering station PSU's out there- this one pictured below is what I consider not very good. KSGER, Quicko, Banggood sell them too. At $12.50 it is $1.50 USD cheaper than the previous one.
              It has 1A rectifier diodes, small heatsinks, very small primary caps 22uF 450V each, super thin PE GND trace. Runs hot, high stress on parts and not for heavy duty use.
              Attached Files

              Comment


                #8
                Re: KSGER STM32 T12 soldering stations

                Which of one of photos is a good quality one let see if the one I have is a good one or I should use the medical grade switching power supply that I just bought and change the low voltage power cord on
                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


                  #9
                  Re: KSGER STM32 T12 soldering stations

                  Left is the lower quality one, right is the better quality one.
                  Before I was mentioning the right better quality one that had a few weaknesses.
                  Attached Files
                  Last edited by redwire; 06-12-2019, 01:12 PM.

                  Comment


                    #10
                    Re: KSGER STM32 T12 soldering stations

                    Originally posted by redwire View Post
                    It's a good power supply. Just the two issues with 100V snubber cap and heatsink on the HV pcb trace, and it takes a few seconds to power up.
                    can you remove a few mm of the heatsink where it crosses the track??

                    btw, i dont think it does take a few seconds to power up,
                    i saw a video - may have been VoltLog, with a meter on the output.
                    the psu startup was instant but the controller firmware took a few seconds to init the oled display - maybe while it averaged some samples from the thermocouples.

                    Comment


                      #11
                      Re: KSGER STM32 T12 soldering stations

                      A person could grind off the fin on the heatsink for more clearance. I used Kapton tape and lifted the heatsink up a bit, it does have sharp edges which would cut solder mask.

                      It really does take several seconds to light up the red LED on the 24V rail. Not as long if you switch it off and then on.
                      I can't find datasheets for the CR8642S PWM IC. It has 1.5MEG HV DC feed and 22uF 50V cap, so I'll bet it's taking its time charging that to start up. Or a 120VAC version needs a lower resistor value. It's kinda weird. Voltlog is 240VAC so maybe that is covering it.

                      edit: Changed out the 22uF 50V 105C Chong-X capacitor. It tested fine. No difference in 3 second start-up time. Power-off it quickly goes from 16V to 9V and takes many minutes to discharge to zero. When it still has charge, next start-up is quicker, maybe 1.5 seconds.
                      Last edited by redwire; 06-12-2019, 03:36 PM.

                      Comment


                        #12
                        Re: KSGER STM32 T12 soldering stations

                        I have the version the one on the right side of the photo
                        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: KSGER STM32 T12 soldering stations

                          Originally posted by sam_sam_sam View Post
                          I have the version the one on the right side of the photo
                          That's the better one, it's still pretty good for stuff out of china, with the usual couple of weak points.
                          I think most important is adding a PE ground wire from the IEC outlet to the chassis.

                          Comment


                            #14
                            Re: KSGER STM32 T12 soldering stations

                            Yes I agree with you about that I am surprised that this was done
                            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: KSGER STM32 T12 soldering stations

                              Anyone know the T12 handle components? They ship two NTC thermistors and two different motion switches, a ball shake switch and a mercury switch.

                              The black blob NTC I have only seen on a controller board and the glass MF58 part I used. The 0.1uF cap sometimes across the NTC, other times across the heater, the handle wiring is always different.

                              Got a replacement T12 controller board V2.1S and the cold-junction temperature is now working. Display shows !24°C if the handle is unplugged, where the old one was just stuck at what was entered at the cal menu.
                              Impossible to desolder the GX12 connector, I had to trash it to get the board out.
                              Attached Files
                              Last edited by redwire; 06-30-2019, 10:03 AM.

                              Comment

                              Working...
                              X