Service and maintenance
Devices that are connected to the protective earth system of a building and to a
coax cable distribution system either directly or via other devices may, under
certain circumstances, cause a fire hazard. Connection to a cable distribution
system therefore is to be provided through a device providing electrical isolation
below a certain frequency range (galvanic isolator, see EN 60728-11).
Risk of electric shock during maintenance
Always disconnect the power cable and other cables from the device before
Danger of electrical shock while cleaning the device
Disconnect the device from the mains supply before cleaning it.
Do not use liquid cleaners or sprays that contain alcohol, spirit or ammonia.