I was repairing an Asian ETA28xx today and I've decided to investigate and took a couple of video shots to show why and how the keyless problem occurred. It's also to visual compare and understand the difference between the two methods, winding position and setting position.
The winding position video, http://youtu.be/YbiZ4qtgDWw
The setting position video, http://youtu.be/bIaS4tiG7q8
In the experiment, in winding position, I press the indented portion a little more but not too much.
In the setting position, I did the same. In fact, after the video recording, I press all the way in but it did not cause any problem.
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