The service manual is a good quality scan of the Panasonic NV-850, which is electrically identical to the Philips VR 6920, but mecanically just nearly.
Removal of the Zoom Motor Unit and Master Flange Unit
1. Remove the solders (2 points). 2. Remove the lock (3 points). 3. Unscrew the 5 screws (A). 4. Remove the Zoom Motor Unit to the indicated by arrow. 5. Remove the cover. 6. Remove the master flange unit.
1. Push the drive unit to the indicated by arrow from lens side, and then remove the unit of drive/direct unit, 1st lens frame/2nd lens frame move unit from the fixed frame unit.
11.4.2.
Removal of the Drive/Direct Unit, 1st Lens Frame/2nd Lens Frame Move Unit
1. Turn the drive gear to the indicated by arrow fully.