Section
9—MicroLab
1
Instruction
DIAGRAMS
AND
CIRCUIT
BOARD ILLUSTRATIONS
Symbols
Graphic symbols and class designation letters are
based
on
ANSI
Standard
Y32.2-1975.
Logic
symbology
is
based
on
ANSI
Y32.14-1973
in
terms
of
positive logic. Logic
symbols depict
the
logic
function
performed and
may differ from
the manufac-
turer's data.
The overline on a signal
name
indicates
that
the signal
performs
its
intended function
when
it
is in
the
low
state.
Abbreviations
are
based
on
ANSI Y1.1-1972.
Other
ANSI
standards
that
are
used
in
the preparation
of
diagrams
by
Tektronix,
Inc.
are:
Assembly
Numbers
and
Grid
Coordinates
Each
assembly
in
the
instrument
is
assigned
an
assembly number
(e.g.,
A20).
The assembly number
appears
onthe
circuit
board outline
on
the
diagram,
inthe
title for
the
circuit
board
component
location
illustration,
and
in
the
lookup
table
for
the
schematic diagram and
corresponding
component
locator
illustration.
The
Replaceable
Electrical
Parts
list
is
arranged
by
assemblies
in
numerical
sequence; the
components
are
listed by
component
number
*(see
following
illustration
for
constructing
a
component number).
{>
wo
Function Block Title
Internal
Screwdriver
Adjustment
Cam
Switch
1
Glosure Chart
(Dot
indicates
switch closure)
Etched Circuit Board
Outlined
in
Back
|
Refer to Waveform
Function Block
2
Suting
IC
type
Test Voltage
Heat
Sink
Board Name
P/O—Part
of
L
|
circuit board
P20_AS_TIMING
BOARD
Assembly Number
~
87B-XxXxX-xx
Tektronix Part
No,
"component
NuMBER EXAMPLE
for circuit
boards
The information
and
special symbols
below may
appear
in
this manual.
14.15,
1966
Drafting
Practices.
Y14.2,
1973
Line Conventions
and Lettering.
Y10.5, 1968
Letter
Symbols
for
Quantities
Used
in
Electrical
Science
and
Electrical
Engineering.
American National
Standard
Institute
1430
Broadway
New York,
New
York 10018
Component
Values
Electrical
components
shown
on
the
diagrams
are
in
the
following units
unless noted
otherwise:
Capacitors
=
Values
one
or
greater
are
in
picofarads
(pF).
Values
less than
one
are
in
microfarads
(uF).
Resistors
=
Ohms
(Q).
The
schematic diagram
and
circuit
board
component
location
illustration have grids.
A
lookup
table
with
the
grid
coordinates
is
provided
for
ease
of
locating the
component.
Only
the
components
illustrated
on
the
facing
diagram
are listed
in
the lookup
table. When more
than
one schematic diagram
is
used
to
illustrate
the
circuitry on
a
circuit board,
the
circuit board
illustration may only
appear opposite the
first
diagram
on
which
it
was
il-
lustrated; the
lookup
table will
list
the
diagram
number
of
other diagrams
that
the circuitry
of
the
circuit board
appears
on.
Modified Component—See
Parts
List (Depicted
in
grey,
or
with grey outline)
Strap
or Link
Plug
to
E.C.
Board
Box|-
Identifies
Pane!
fontrols,
Connectors
and
Indicators
Coaxial connectors:
male
female
Plug Index; signifies
pin
No.
1
External Screwdriver
Ad.
Shielding
Selected
value,
see
Parts
List
and Maintenance
Section
for
Selection Criteria
Decoupled
or
Filtered
joltage
Refer to Diagram Number
SYNC
GENERATOR
&
Schematic Name
and Number
REV
A MAY
1980
f
SWvHOVIG—6
NOILD3S
Summary of Contents for 067-0892-00
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