Trouble Shooting - Hitachi RAS-18YH4 Service Manual

TROUBLE SHOOTING

RAC-18YH4
PRECAUTIONS FOR CHECKING
WARNING
Remember that
voltage of 175 V is
applied to the 0V line
on the P.W.B. or the
like as shown in the
right diagram.
WARNING
When using an
oscilloscope, never
ground it.
Don't forget that high
voltage as noted in
the figure above may
apply to the
oscilloscope.
Power
inlet
Always keep your hands
and metallic things away
from the cabinet.
– 70 –
DANGER!
Don't install
the ground
line.