Electrostatic
Discharge
Information
Electrostatic
discharge
(ESD)
can
damage
or
destroy
electronic
components
.
All
work
on
electronic
assemblies
should
be
performed
at
a
static-safe
work
station.
Figure
1-2
shows
an
example
of
a
static-safe
work
station
using
two
types
of
ESD
protection:
(1)
wrist-strap
(with
greater
than
1m
isolation
to
ground)
and
table-mat
combination,
(2)
heel-strap
(with
greater
than
1m
isolation
to
ground)
and
conductive
oor-mat
combination.
The
two
types
must
be
used
together
to
ensure
adequate
ESD
protection.
Isolation
to
ground
must
be
provided
for
personnel
protection.
Refer
to
T
able
1-3
for
a
list
of
static-safe
accessories
and
their
part
numbers
.
W
ARNING
In
order
to
provide
proper
personnel
protection,
the
wrist-
and
heel-straps
must
have
greater
than
1mohm
isolation
to
ground.
Hazards
of
Internal
Repair
and
A
djustment
If
the
HP
70001A
bottom
cover
is
removed
for
any
reason,
the
following
precautions
must
be
observed.
W
ARNING
Disassembly
,
adjustments
,
and
internal
repairs
should
only
be
attempted
by
qualied
technical
personnel.
The
mainframe
internal
power
supplies
have
lethal
voltages
,
with
lethal
currents
,
in
all
areas
.
D
ANGEROUS
V
OL
T
A
GES
exist
on
boards
in
this
instrument
even
when
the
power
is
o.
Board
assembly
voltages
cannot
be
safely
measured
without
an
isolation
transformer
.
A
C
power
line
voltage
is
present
on
the
power
supply
board,
even
when
the
power
switch
is
o.
The
power
supply
board
circuit
common
can
be
at
approximately
0200
V
,
not
earth
ground.
Capacitors
may
retain
high-voltage
stored
charges
for
several
minutes
,
even
with
no
power
applied.
1-8
General
Information
