1.The unit is half. Minor.The
power-supply voltage of the
system is outside ratings.
3.The equipment that
generates the noise in the
same power supply system
as the power supply origin
of the system is connected,
and it malfunctions because
of the power supply noise.
4.The equipment to which it
is adjacent to of a main
device, and has put out the
radiation noise exists, and it
malfunctions because of the
radiation noise. 5.The
chassis is not properly
grounded.