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.
un manual completo con una calidad de imagen buena con explicaciones en varios idiomas de los ajustes y detalles en conjunto un OK.
Text excerpt from page 31 (click to view)
10 Maintenace
10.1. Cleaning Lens and LCD Panel
Do not touch the surface of lens and LCD Panel with your hand. When cleaning the lens, use air-Blower to blow off the dust. When cleaning the LCD Panel, dampen the lens cleaning paper with lens cleaner, and the gently wipe the their surface. Note: The Lens Cleaning KIT ; VFK1900BK (Only supplied as 10 set/Box) is available as Service Aid.