My previous post was based on your measured result:
I have already measured the resistance allocation of the main transformer wires using an LCR meter.
https://drive.google.com/drive/folders/1jEZNpgb04ZSw6yBU3Tum0yNrq4RdXZ6P?usp=sharing
Orange - 120V Red - 100V Grey - 0V
Yellow - 120V Brown - 100V White - 0V
I should have been more specific:
100V 1 = orange, 2 = red+brown, 3 = yellow, 4 = white+grey, 5 = empty
120V 1 = red, 2 = orange+yellow, 3 = brown, 4 = white+grey, 5 = empty
220V 1 = orange, 2 = red, 3 = grey+yellow, 4 = white, 5 = brown
240V 1 = red, 2 = orange, 3 = grey+yellow, 4 = white, 5 = brown
As you can see, there's actually no 230V setting! Depending on your country, you can set it to 240V (UK) or 220V (China).
I believe it should be fine to replace the orange line with the red one, which is rated for 100v, according to my understanding.
Yes, this should not cause any problems.
I would greatly appreciate it if you could explain the significance of the white line coming from the board with the relay.
It provide the required power to the soft-start board.
When the power switch pressed in, mains voltage applied through two sets of ceramic resistors paralleled (J1,J3 in place for 100V/120V) or in series (Remove J1,J3 install J2 for 220V/240V) in order to reduce inrush current.
After a few seconds, the relay turn on and bypass the soft-start resistors.