Anyway to increase the temperature of this preheater?

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  • caphair
    Badcaps Legend
    • Nov 2011
    • 1249
    #1

    Anyway to increase the temperature of this preheater?

    It's a preheater for iPhone models X-11 that use low melt 138c solder between the sandwiched layers. Has a constant temp setting of 180-190c

    I want to use it for newer iPhone 12 models which use a higher solder between the layers I believe 168c.

    Anyway to increase the temp of the preheater to 230c?
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    • sam_sam_sam
      Badcaps Legend
      • Jul 2011
      • 6037
      • USA
      #2
      Re: Anyway to increase the temperature of this preheater?

      This type of heater are preset from the factory and you would have to replace them for the temperature that you need

        Comment

        • eccerr0r
          Solder Sloth
          • Nov 2012
          • 8701
          • USA
          #3
          Re: Anyway to increase the temperature of this preheater?

          Can always bump up voltage but then if the solder on the preheater starts to melt...

            Comment

            • harp
              Badcaps Veteran
              • Jun 2022
              • 598
              • Planet Earth
              #4
              Re: Anyway to increase the temperature of this preheater?

              The top heater is directly conect to the main?, center and bottom are in series (no its not, my mistake). I wil try to desolder all of this, and measure resistance of each, maybe a simple dissarange of paralell-serial connection will increase temperature.

              What is input voltage and resistance of each heater?
              Last edited by harp; 06-06-2022, 06:40 AM.

                Comment

                • redwire
                  Badcaps Legend
                  • Dec 2010
                  • 3906
                  • Canada
                  #5
                  Re: Anyway to increase the temperature of this preheater?

                  That looks like three ceramic PTC heaters. Their self-regulating temperature is built in to their design.
                  You can get them cheap on Aliexpress, example. 110VAC is a bit harder to find.
                  But if you put in higher temp parts, how to do low temps? You could add a cheap temperature controller STC-1000 to it, not with a cheap thermistor sensor but an RTD or thermocouple can take the higher temps.

                  I hope it's not mains powered, there is improper high voltage spacing due to the copper pour. That doesn't look so great.
                  edit: I see the LED is connected to those traces, it must be 12V heaters.

                    Comment

                    • caphair
                      Badcaps Legend
                      • Nov 2011
                      • 1249
                      #6
                      Re: Anyway to increase the temperature of this preheater?

                      Originally posted by redwire
                      That looks like three ceramic PTC heaters. Their self-regulating temperature is built in to their design.
                      You can get them cheap on Aliexpress, example. 110VAC is a bit harder to find.
                      But if you put in higher temp parts, how to do low temps? You could add a cheap temperature controller STC-1000 to it, not with a cheap thermistor sensor but an RTD or thermocouple can take the higher temps.

                      I hope it's not mains powered, there is improper high voltage spacing due to the copper pour. That doesn't look so great.
                      edit: I see the LED is connected to those traces, it must be 12V heaters.
                      There's a plug that connects to it with an on/off switch in line with the cord going to mains. Is mains converted to 12v somewhere?

                        Comment

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