Announcement

Collapse
No announcement yet.

Miller Syncrowave 180SD welder repair shop in Charleston, S.C.

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

  • #31
    In my experience, 4-pin DIP (dual in-line pin) packages have often been optoisolators but you really can't tell without the documentation. Did you try two magnifying glasses together as Cruizer said? How about lighting it from different angles to get past the reflection on the coating?

    Comment


    • #32
      I tried my readers with one thick magnifying glass. Will try two or another pair of 'good' eyes. Thanks for the info!!😊😊😊

      Comment


      • #33
        May have thick conformal coat on it. It can be removed by carefully lifting it off with a box cutter. then with a little bit of water on top the part, the code can be read.

        Comment


        • #34
          Originally posted by Mike22590 View Post
          Found Q1. It's a 4 pin transistor? I don't see any part numbers.
          Well Q1 and Q2 control the primary side grounds to transformers T1 and T2 that fire SCRs 2/4 and 1/3 respectively so as such I don't see Q1 being your issue.
          MM200 w/spot controller and Spoolmatic 1
          Syncrowave 180 SD
          Bobcat 225G Plus LPG/NG w/14-pin*
          *Homemade Suitcase Wire Feeder
          *HF-251D-1
          *WC-1S & Spoolmatic 1
          PakMaster 100XL
          Marquette "Star Jet" 21-110
          http://www.millerwelds.com/images/sm...rolleyes.png?2

          Comment


          • #35
            Well now that throws a monkey wrench in things😨😨

            Comment


            • #36
              Originally posted by Mike22590 View Post
              Well now that throws a monkey wrench in things😨😨
              No disrespect to Duane

              But...

              I would tend to favor Cruizer.... he has been a trained FULL TIME Miller tech for a lot of years..Day in Day out...
              and has an untold number of these repairs under his belt.....
              Not to mention that he has all the Service Manuals and Schematics

              His track record on this board has been excellent.........
              Last edited by H80N; 06-01-2016, 04:51 PM.
              .

              *******************************************
              The more you know, The better you know, How little you know

              “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

              Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

              My Blue Stuff:
              Dynasty 350DX Tigrunner
              Dynasty 200DX
              Millermatic 350P w/25ft Alumapro & 30A
              Millermatic 200

              TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

              Comment


              • #37
                Numbers on Q1 transistor: 109007 R9903 3A 6T

                Comment


                • #38
                  Couple of close hits but no sure fire replacement. It does appear to be an optoisolator - Vishay has some similar-sounding part numbers to the 3A6T. Search both the 3A6T and R9903. Either could be the part number. The 109007 doesn't sound like a part number, but that's just an educated hunch.

                  Comment


                  • #39
                    I'll pull up the diagram on the big screen tomorrow, and have another looksee.. We do know that the pulse transformers are not firing.
                    Last edited by cruizer; 06-01-2016, 11:14 PM.

                    Comment


                    • #40
                      Before the R9903 there was what looked like a capital I and a symbol.....maybe transistor symbol??

                      Comment


                      • #41
                        https://www.westfloridacomponents.co...rer-logos.html

                        Check this link and see if you can find a matching logo. Will at least get you to the right mfr. if you can find it

                        Comment


                        • #42
                          From memory it looked like either Zetex or Goodark. I'll check when I get home this afternoon. Thanks for the info!! 😊😊😊

                          Comment


                          • #43
                            Hopefully this is legible.
                            Attached Files

                            Comment


                            • #44
                              Originally posted by Mike22590 View Post
                              Hopefully this is legible.
                              Quit legible.... look familiar...??




                              Last edited by H80N; 06-02-2016, 08:18 PM.
                              .

                              *******************************************
                              The more you know, The better you know, How little you know

                              “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

                              Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

                              My Blue Stuff:
                              Dynasty 350DX Tigrunner
                              Dynasty 200DX
                              Millermatic 350P w/25ft Alumapro & 30A
                              Millermatic 200

                              TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

                              Comment


                              • #45
                                BINGO...!!!

                                109007

                                Darned if it isn't an IR part with an OEM Miller number & $7.40 at Miller4Less

                                http://miller4less.com/advanced_sear...=11&search.y=2
                                Last edited by H80N; 06-02-2016, 09:39 PM.
                                .

                                *******************************************
                                The more you know, The better you know, How little you know

                                “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

                                Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

                                My Blue Stuff:
                                Dynasty 350DX Tigrunner
                                Dynasty 200DX
                                Millermatic 350P w/25ft Alumapro & 30A
                                Millermatic 200

                                TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

                                Comment

                                Working...
                                X