HP 8340b - Primary Power; Theory of Operation

Power
Supplies/Fan
Theory
of
Operation
PRIMARY POWER
Primary
power
is
supplied
to the
instrument
transformer primary
through
the
line
filter
module.
The
voltage selector
cam
position
provides
correct power
connections
to the
transformer
for
line
voltages
of
100,
120, 220,
or
240
Vac
±10%,
at
47.5
to
66
Hz,
LINE
MODULE
The
line
module
performs
several
functions:
•
The
main
line
fuse
protects
the
instrument from:
Line
voltage
surges
Incorrect
line
voltage
Line
module,
transformer,
motherboard,
or
rectifier
assembly
shorts.
•
Line
transient
suppression.
•
Line
voltage configuration (see
Figure 1-1).
1-2
Power Supplies/Fan
Theory
of
Operation
HP 8340B/41B