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.
The service manual is a good quality scan of the Blaupunkt RTV-404, which is electrically and mecanically identical to the Panasonic NV-830.
Text excerpt from page 16 (click to view)
DISASSEMBLY INSTRUCTIONS
2-11: FEED MOTOR (Refer to Fig. 2-11-A) 1. Remove the 2 screws 1. 2. Remove the Feed Motor. 3. Remove the Motor Gear.
11
Main Chassis Ass'y Motor Gear Feed Motor � Screw Torque: 1 ± 0.5kgf�cm
Fig. 2-11-A
NOTE 1. In case of the Motor Gear installation, check if the value of the Fig. 2-11-B is correct. 2. When installing the Feed Motor, check if the cable is positioned as Fig. 2-11-C.