Again, watch a bunch of YouTube videos on hot air rework.? They will tell you temperature to use and LOTS more.
Comments in (parentheses) are my opinions, and I Am Not An Expert.
- Temperature (start with 350C)
- How much airflow to use (never the maximum!)
- What direction to point the hot air gun (I usually point it straight down; opinions vary.? I'll say "straight down but incline it toward an area of the board with the fewest nearby components")
- Preheating, then focusing on the component to remove.? (Patience!)
- Use of Kaptan tape or aluminum foil to protect heat sensitive, e.g. plastic parts, or to protect nearby components from the hot air stream.
- How to watch the nearby components to see when unwanted joints are being melted.
- Counting on surface tension of the molten solder of nearby components to keep them from flying away (too much airflow and they will fly away anyway).
- How to gently nudge the part while waiting for all the joints to melt (this avoids lifted pads and traces).
- How to remove the part once all the joints have melted (Tweezers!? Buy a very good tweezer).
I like Louis Rossman, so you might start here:
I also like NorthridgeFix.? He's a working repair tech, not so much an instructor.
Whereas this guy is kind of a klutz:
If other people have favorite videos on hot air rework, please post so we can all learn.
Rich
