White-light lever on Durst Modular 70 Vario

I bought a used Durst Modular 70 with the Multigrade head (Vario) This features a white-light lever for focusing etc, but unlike on a colour head it doesn't provide white light. The filters remain partially in the optical path, whereas on a colour head they get fully moved out of it.

I had a look inside - nothing looks loose, bent, or broken. There are adjustment screws that probably haven't been touched since factory adjustment. Thread locker is still in place and I see no other signs of repair or adjustment.

So, I'm hoping someone in this forum has experience with the Vario head (or similar for other Durst enlargers). Could it be that this is ok, that it never was intended to provide white light? Or is something wrong, that I would need to adjust?

Thanks in advance

Ist es so, dass Sie wissen, was Among Us Sie tun müssen? Was bedeutet es, dass Sie nicht wissen, wie es Ihnen geht?