Section
9-2225
Service
DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS
Symbols
Graphic symbols and class designation letters are
Y14.15, 1966 Drafting Practices.
based on
ANSI Standard Y32.2-1975.
Y14.2, 1973 Line Conventions and Lettering.
Y10.5, 1968
Letter Symbols for Quantities Used in
Logic symbology is based on
ANSI Y32.14-1973 in Electrical Science and Electrical
terms of positive logic. Logic symbols depict the logic
Engineering.
function performed and may differ from the manufac-
turer's data.
American National Standard Institute
1430 Broadway
New York, New York 10018
The
overline on a signal name indicates that the signal
performs its intended function when it is in the low state.
Component
Electrical components shown on the diagrams are in
the following units unless noted otherwise:
Abbreviations are based on ANSl
Y1.l-1972.
Capacitors
=
Values one or greater are in picofarads (pF).
Values less than one are in microfarads
Other
ANSI standards that are used in the preparation
(PF).
of diagrams by Tektronix, Inc. are:
Resistors
=
Ohms
(R).
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 on 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
Internal
Screwdriver
Adiuslment
Cam Switch
Closure Chart
(Dot indicates
switch closure)
Etched Circuit Board
Outlined in Black
Refer to Waveform
Function Block
Outline
IC
type
Test Voltage
Heat Sink
Board Name
~/o-~art of
circuit board
Assembly Number
Tektronix Part No.
for circuit boards
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 illustratethecircuitry 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.
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Modifled Component
(Depcted in Grey, or With
Grey Outline)
-
See PaRSbSt.
strap or Link
Plug to E.C. Board
Indicators
Coaxial connectors:
male
female
Plug Index; signifies pin No.
1
External Screwdriver Adi.
Shielding
Selected value, see Parts List
and
Ma~ntenance Section for
Selection Criteria
Decoupled or Filtered
voltage
Refer to Diagram Number
Schematic Name
and Number
Scans
by
ARTEK
MEDIA
*
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