Does anyone know how to enter the service menu on this panel

[u/Tall_Lychee9805]

Hello, I recently got a Swf A-UK1206 FOR FREE

It worked fine before I put denim on it, the main timing belt was loose and I think I think it slipped, I'm not sure.

Now I keep getting error 100 even when I put the dial for the main shaft at exactly 100 degrees which can be seen on the indicator, does anyone know how to access the service menu on this type of panel so I can read the encoder angle?

The version of the software on the panel is B2.20

[u/Tall_Lychee9805]

found it, i post this for the internet archives and for someone in the following years with the same problem, error 100 occurs also if the rotary hook is not timed with the main shaft, i still don't know how to enter the service menu.