Quoted from SkillshotExhibit:I replaced the q66 transistor
You might have shorted out that transistor again,Your dealing with 3 things here
1.The transisitor
2.pre-drive transistor(smaller transistor)Locate them on the schematics in the manual
3.The coil that runs the magnet if a coil is there to the magnet(Coil rarely goes bad unless it is fried or shorted..Probably the burning smell your talking about
is it locking on/staying activated?did you test the coil for the correct ohms? it should be 2 ohms or higher.
Its always best to replace all 3 at one time.