Hexacon 1002 Soldering station

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My old friend decided to self destruct by creating an orange glowing tip before I noticed it wasn't regulating the temp.

ANy ideas or cross on the solid state components?

I'm guessing that either the H8011 IC or the H8010 are the cause, But, I do not know how the temperature on the tip is sensed, and then regulated.

My guess is that H8010 is a thermister and the other is the microcontroller, perhaps a matched pair?

Best from Tucson
Bob
 

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