Interface Connector Pin Locations; Performance Check And Adjustment; Static Sensitive Devices; Location Of Pin Numbers On Interface Connector - Tektronix 7B87 Instruction Manual

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
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 microcircuits or 1
discretes, or linear microcircuits
with MOS inputs. (Most sensitive)
ECl
2
Schottky signal diodes
3
Schottky TIL 4
High-frequency bipolar transistors
5
JFETs
6
linear Microcircuits
7
low-power Schottky TTL 8
TIL (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 = 250 V 6 = 600 to 800 V 9 = 1200 V
(Voltage discharged from a
100
pF capacitor through a resistance of
100 ohms.)
@
Maintenance-7B87
38--~~·rM~~4-----~---------38
B
A
C1986-69
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