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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 and Power Supply diagram 8
in the
diagrams
section.
PERFORMANCE
CHECK
AND
ADJUSTMENT
The
Performance
Check
and
Adjustment
procedure,
given
in section
5 of this manual,
provides a quick and
convenient
means
of checking
instrument
operation.
In
some cases, minor troubles may be revealed or corrected
by
adjustment.
STATIC-SENSITIVE
DEVICES
Yeaurion
2
Ann rn nnn'
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
Semiconductor
Classes
Susceptibility
Levels'
'MOS or CMOS microcii
or
1
discretes, or linear
microcircuits
with
MOS
inputs.
(Most
sensitive)
ECL
_
a
ee
ky signal diodes __
38
Schottky
TTL
4
High-frequency b i p o l a r transistors _|
—
anes
eee
:
Seen
Lo
|
7
Low-power
Schottky
TTL
_
8
TTL (Least
sensitive)
9
'Voltage equivalent for levels:
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 = 600 to 800 V 9 = 1200 V
(Voltage discharged from a 100 pF capacitor through a resistance of
100 ohms.)
Maintenance—7B87
1986-69
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 from your body 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.
4-5
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