Tektronix DC 5010 Anleitung Seite 313

Section 8 D C 501 0
DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS
Symbols
Graphic symbols and class designation letters are
based on ANSl Standard Y32.2-1975.
Logic symbology is based on ANSl 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 i n the low state.
Abbreviations are based on ANSl Y1 .l-1972.
Other ANSl standards that are used in the preparation
of diagrams by Tektronix, Inc. are:
Y14.15, 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 i n picof-arads (pF).
Values less than one are in microfarads
(/m.
Resistors =
0 hms
(n).
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
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
constructing a component number).
appears on.
A B C D
Funct~on Block T ~ t l e
Internal
Screwdriver
--"
- , ,
Adjustment
Cam Switch
Closure Chart
--
(Dot Indicates
sw~tch closure)
Etched C ~ r c u ~ t Board
7 ,
Outlined In Black
Refer to Waveform
-
IC type
-
Test Voltage
-
Heat Sink
-
Board Name
-
PIO-Part of
crrcult board
-
* - - - -
Assembly Num bbr
-
a - X X X X - x x
-*
- -- -
a-
--*
Tektron~x Part No
r " #
* C O M P O N E N T
NUMBER EXAMPLE
for clrcult boards S Y N C G E N E R A T O R
@
-.,
%L
-. --
? L - . .
Modified Component-See
Parts List (Depicted in grey,
or with grey outline)
Strap or Link
Plug t o E.C. Board
Box
-
Identifies Panel
on rols, Connectors and
L J
l ndicators
Coaxial connectors:
male
female
Plug Index; signifies pin No.
1
External Screwdriver Adj.
Shielding
Selected value, see Parts List
and Maintenance Section for
Selection Criteria
Decoupled or Filtered
Voltage
Refer to Diagram Number
Schematic Name
and Number