Operating instructions
number
etched
on
the
circuit
board
.
The
J
numbers,
on
the
circuit
boards,
correlate to
the
J
and
P
component
numbers
on
the
schematic
diagrams
.
INTERFACE
CONNECTOR
PIN
LOCATIONS
The
Interface
circuit
board
couples
the
plug-in
unit
to
the
associated
mainframe
(oscilloscope)
.
Figure
4-5
identifies
the
pins
on
the
interface
connector
as
shown
on
Interface
Connectors
andPower
Supply
diagram
8
in
the
diagrams
section
.
PERFORMANCE
CHECK
AND
ADJUSTMENT
The
Performance
Checkand
Adjustment
procedure,
given
in
section
5
of
this
manual,
provides
a
quick
and
convenient
means
of
checkinginstrument
operation
.
In
some
cases,
minor
troubles
may
be
revealed
or
corrected
by
adjustment
.
STATIC-SENSITIVE
DEVICES
Static
discharge
can
damage
any
semiconductor
component
in
this
instrument
.
This
instrument
contains
electrical
components
that are
susceptible
to
damage
from
static
discharge
.
See
Table
4-1
for
relative
susceptibility
of
various
classes
of
semiconductors
.
Static
voltage
of
1
kV
to
30 kV
are
common
in
unprotected
environments
.
Observe
the
following
precautions
to
avoid
damage
.
TABLE
4-1
Relative
Susceptibility
to
Static
Discharge
Damage
Relative
Susceptibility
Levels'
Semiconductor
Classes
MOS
or
CMOS
microcircuits
or
discretes,
or
linear
microcircuits
with
MOS
inputs
.
(Most
sensitive)
Schottktl
diodes
-
_
Schottky
TTL
High-frequency
bipolar transistors
JFETs
Linear
Microcircuits
Low-power
Scho
tt
tt_ky
TTL
1`i
L
(Least
sensitive)
^
~~
'
Voltage
equivalent
for
levels
:
100
ohms
.)
1
=
100
to
500
V
4
=
500
V
7
=
400
to
1000
V
(est
.)
2
=
200
to
500
V
5
=
400
to
600
V
8 =
900
V
3=250V
6=600to800V
9=1200V
(Voltage
discharged
from
a
100pF
capacitor
through
a
resistance
of
Maintenance----71387
Figure
4-5
.
Location
of
pin
numbers
on
Interface
connector
.
1
.
Minimize
handling
of
static-sensitive
components
.
2
.
Transport
and
store
static-sensitive
components
or
assemblies
in
their
original
containers,
on
a
metal
rail
or
on
conductive
foam
.
Label
any
package
that
contains
static-sensitive
assemblies
or
components
.
3
.
Discharge
the
static
voltage
fromyourbody
by
wearing
a wrist strap
while
handling
these
components
.
Servicing
static-sensitive
assemblies
or
components
should be
performed
only
at
a
static-free
work
station
by
qualified
service
personnel
.
4
.
Nothing
capable
of
generating
or
holding
a
static
charge
should be
allowed
on
the
work
station
surface
.
5
.
Keep
the
component
leads
shorted
together
whenever
possible
.
6
.
Pick
up
components
by
the
body,
never
by the
leads
.
7
.
Do
not
slide
the
components
over
any
surface
.
8
.
Avoid
handling
components
in
areas
that
have
a
floor
or
work-surface
covering
capable
of
generating
a
static
charge
.
a
4-5