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Anyway to increase the temperature of this preheater?

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    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?
    Attached Files

    #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
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    All of these had CAPs POOF
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      #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...

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        #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.

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          #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


            #6
            Re: Anyway to increase the temperature of this preheater?

            Originally posted by redwire View Post
            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?

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