Toyo TS - 905 don't heat...

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  • rmateus
    New Member
    • Nov 2010
    • 5
    #1

    Toyo TS - 905 don't heat...

    Hi guys,

    I'm having trouble finding the defect of this soldering station:

    Toyo TS - 905

    The iron heats up to + / - 60 ° C and maintains this temperature. Turning the pot nothing happens. When it reaches this temperature, the LED which indicates that the temperature is always blinking.

    Replace the C1701C, but the problem still remains. After that, replace also HA17324.

    Has anyone had a problem like this?

    Thank's!


    Tags: None
    • Badcappy
      Banned
      • Aug 2007
      • 52
      #2
      Re: Toyo TS - 905 don't heat...

      + / - 60 ° C
      I'd be pretty surprised if it heated up to -60°C...

      Have you checked the thermistor?

        Comment

        • Krankshaft
          Badcaps Legend
          • Jan 2007
          • 2328
          • USA
          #3
          Re: Toyo TS - 905 don't heat...

          Check the triac and see if it's open.

          Also post the part numbers on the two ICs.
          Elements of the past and the future combining to make something not quite as good as either.

            Comment

            • rmateus
              New Member
              • Nov 2010
              • 5
              #4
              Re: Toyo TS - 905 don't heat...

              Originally posted by Badcappy
              I'd be pretty surprised if it heated up to -60°C...

              Have you checked the thermistor?

              Ops! I meant ~60ºC (approximately).

              Mine don't have a thermistor. Has only two wires...

                Comment

                • rmateus
                  New Member
                  • Nov 2010
                  • 5
                  #5
                  Re: Toyo TS - 905 don't heat...

                  Originally posted by Krankshaft
                  Check the triac and see if it's open.

                  Also post the part numbers on the two ICs.

                  The Triac it's OK. Was my first hint.

                  The IC's are:

                  C1701C = 8 pins
                  HA17324 = 14 pins

                  Yesterday, I removed each of the components and measured them. Nothing, all were within the limits ...

                  Tonight I will keep trying

                    Comment

                    • Agent24
                      I see dead caps
                      • Oct 2007
                      • 4940
                      • New Zealand
                      #6
                      Re: Toyo TS - 905 don't heat...

                      Please upload your photos in your posts rather than using an external hosting site. That way they will always be here even if the originals site gets changed, goes down etc.

                      I have taken the liberty of adding them to my own post here.
                      Attached Files
                      "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                      -David VanHorn

                        Comment

                        • rmateus
                          New Member
                          • Nov 2010
                          • 5
                          #7
                          Re: Toyo TS - 905 don't heat...

                          Yes Agent24. I acted like a rookie ... sorry

                            Comment

                            • rmateus
                              New Member
                              • Nov 2010
                              • 5
                              #8
                              Re: Toyo TS - 905 don't heat...

                              I have good news! After several days of trials and tests I discovered by chance that the 50k trimpot was defective ....
                              Yeah. He seemed to be charred. When I measured the total, everything seemed fine, but after removing it to measure the resistance across its course, he "went mad"!

                              After replacing it, the station was OK!

                              Well, anyway, thank you all and here is a tip!

                              Bye

                                Comment

                                • Agent24
                                  I see dead caps
                                  • Oct 2007
                                  • 4940
                                  • New Zealand
                                  #9
                                  Re: Toyo TS - 905 don't heat...

                                  Good to know you fixed it!

                                  It makes sense that it would cause the problem, but not until you know it was the problem, if you know what I mean.

                                  I wonder if the trimpot was burned due to some other defective component, that you have already replaced?
                                  "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                                  -David VanHorn

                                    Comment

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