Hello.
I have a soldering station, 862D+, and every time the hot air gun is on, even if it is just cooling off, the soldering iron controller stops controlling. Let me explain what has happened so far, as it took a while to get to this.
First, the switch that turns on the hot air gun started to fail, the light came on, but temp never rose, I would have to switch it multiple time to get the gun to start heating, this was due to the contact inside being carbonized. I opened the switch up, clean the contacts, and it would work fin for a while until carbonized again. So, I ordered a switch to replace it. While waiting for the switch to arrive (from china) I kept using the iron and gun (never had an issue with the iron), but one day I switched on the gun, and there was a buzz coming from the inside of the station, seems like transformer buzz, and I didn’t notice at the time, but the iron would go from being on normal, to being on without control.
I kept using it without even noticing that the iron was getting superhot, since it was normally just a few seconds of hot air being used. I ended up swapping the switch and it worked the same way, with a buzz any time the fan was on. Then one day the fan just stayed on, no matter what, I would have to disconnect the whole station to get it to turn off. So I swapped the TIP122 on the fan controller side, and back to normal, no buzz, but the iron will heat infinitely any time the fan is on.
I don’t know what would cause this issue. The only thing I can think of is the microcontroller, since it seems to be the only link between the fan and the iron. But the iron work perfectly when the fan is off. Any ideas?
I have a soldering station, 862D+, and every time the hot air gun is on, even if it is just cooling off, the soldering iron controller stops controlling. Let me explain what has happened so far, as it took a while to get to this.
First, the switch that turns on the hot air gun started to fail, the light came on, but temp never rose, I would have to switch it multiple time to get the gun to start heating, this was due to the contact inside being carbonized. I opened the switch up, clean the contacts, and it would work fin for a while until carbonized again. So, I ordered a switch to replace it. While waiting for the switch to arrive (from china) I kept using the iron and gun (never had an issue with the iron), but one day I switched on the gun, and there was a buzz coming from the inside of the station, seems like transformer buzz, and I didn’t notice at the time, but the iron would go from being on normal, to being on without control.
I kept using it without even noticing that the iron was getting superhot, since it was normally just a few seconds of hot air being used. I ended up swapping the switch and it worked the same way, with a buzz any time the fan was on. Then one day the fan just stayed on, no matter what, I would have to disconnect the whole station to get it to turn off. So I swapped the TIP122 on the fan controller side, and back to normal, no buzz, but the iron will heat infinitely any time the fan is on.
I don’t know what would cause this issue. The only thing I can think of is the microcontroller, since it seems to be the only link between the fan and the iron. But the iron work perfectly when the fan is off. Any ideas?
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