5
Earthing
The Ios uses a Class I earth system, where the case metal
work and earth screen between the primary and secondary
windings in the toroidal transformer, are connected to the line
safety earth, by means of the mains lead.
The internal signal earth is linked to this earth by the use of a
network to eliminate the risk of earth/ground loops.
This earthing method provides a safe and efficient discharge
path for any static charge generated by the cartridge.