Section
10-2445A/2455A
Service
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:
Y14.15, 1966
Y14.2, 1973
Y10.5, 1968
Drafting Practices.
Line Conventions and Lettering.
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
(µF).
Resistors=
Ohms
(0).
The information and special symbols below may appear in this
manual.---
Assembly Numbers and Grid Coordinates
Each assembly in
the
instrument is assigned
an
assembly number (e.g., A20).
The
assembly
number
appears oh
the
circuit
board
outline
on
the
diagram, in the
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).
Function
Block
Title
Test Voltage
Heal Sink
PI O- Part of
A
ci
rcu
it
board
____.,.
Assembly
Number
__
__ ._
,..,,
.--
___.
~ 0
-xxxx
-xx
B0"-RO
C
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.
D
Modified
Component
(Depicted
in
Grey,
or
With
Grev Outline) •
See
Parts List.
Strap
or
Link
~ -
---
Plug
to
E.C. Board
~-
Identifies Panel
~rols,
Connectors and
Indicators
Coaxial connectors:
male
female
Plug Index; signifies pin No. 1
External Screwdriver Adj.
--
-
--
Shielding
Se
lected value,
se
e Parts List
and Maintenance Section for
Selection Criteria
R330
0-_
Decoupled
or
Filtered
Voltage
Refer
to
Diagram Number
Tektronix
Part
No.~~~
///
•
COMPONENT
NUMBER
ElAIPLE
for
circuit
boards
Colr!s,o,11n1
Number
~¥film
SYNC
GENERATOR
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,,
<Md
/
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i:,ont
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ol
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lifllt<ft
oulh
th
LJSt
Schematic
Name
and Number
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