HP 8340b - Introduction

Power
Supplies/Fan
Introduction
The
power
supplies produce
the
voltages required
for
the
instrument and
generate
the
power-up
flag
HPUP
(high
power
up),
which
is
used
by
the
microprocessor
and
several
other
circuits to control
instrument
activity,
and
to
ensure proper
initialization.
ASSEMBLIES
The
power
supplies/fan functional
group
consists
of
five
assemblies,
and
several
components:
A19
capacitor assembly
ASS
rectifier
assembly
A52
positive
regulator assembly
ASS
negative
regulator assembly
A56
—15V
regulator
assembly
A62
motherboard
components
FL1
power
line
module
B1
fan
assembly
T1
transformer
HP
8340B/41B
Power
Supplies/Fan Introduction
1-1