Section 10-1240 Service
DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS
Symbols Y 14.1 5, 1966 Drafting Practices.
Y14.2, 1973 Line Conventions and Lettering.
Graphic symbols and class designation letters are based on
Y10.5, 1968 Letter Symbols for Quantities Used in
ANSI Standard Y32.2-1975.
Electrical Science and Electrical
Logic symbology is based on ANSI Y32.14-1973 in terms of
Engineering.
positive logic. Logic symbols depict the logic function per-
American National Standard Institute
formed and may differ from the manufacturer's data.
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Active low signals are indicated by an (L) following the signal
New York, New York 10018
name or by a horizontal line above the signal name (e.g.,
-
IRQ). Signal names without indicators are considered active- Component Values
high. Some active-high signals are indicated by an (H) follow- Electrical components shown on the diagrams are in the
ing the signal name. following units unless noted otherwise:
Abbreviations are based on ANSI Y1 .I-1972. Capacitors = Values one or greater are in picofarads (pF).
Values less than one are in microfarads (pF).
Other ANSI standards that are used in the preparation of
Resistors = Ohms (Q).
diagrams by Tektronix, Inc. are:
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 The schematic diagram and circuit board component location
number (e.g., A20). The assembly number appears on the illustration have grids. A lookup table with the grid coordi-
circuit board outline on the diagram, in the title for the circuit nates is provided for ease of locating the component. Only
board component location illustration, and in the lookup table the components illustrated on the facing diagram are listed in
for the schematic diagram and corresponding component the lookup table. When more than one schematic diagram is
locator illustration. The Replaceable Parts list is arranged by used to ilustrate the circuitry on a circuit board, the circuit
assemblies in numerical sequence; the components are list- board illustration may only appear opposite the first diagram
ed by component number *(see following illustration for on which it was illustrated; the lookup table will list the
constructing a component number). diagram number of other diagrams that the circuitry of the
circuit board appears on.
A 1 C 1 D
1
I -- -^__ .. -- __I Modified Component
Function Block Title (Depicted in Grey, or With
II Greyoutline) - SeePartsList
internal
Screwdriver -- Strap or Link
Adjustment
Cam Switch
Closure Chart
(Dot indicates
switch closure) Plug to E.C. Board
Etched Circuit Board 111
Outlined in Black
Indicators
Refer to Waveform -y+-
Coaxial connectors:
Function Block -. ~ ~ male
Outline
female
Plug Index; signifies pin No. 1
External Screwdriver Adj
Test Voltage - -- --
t Shielding
Heat Sink
Selected value, see Parts List
Board Name - and Maintenance Section for
Selection Criteria
P/O h
P/O-Part of
circuit board >
Decoupled or Filtered
Voltage
Assembly Nurnber %- 670-XXXX-XX R330 @--_-
Refer to Diagram Number
Tektronix Part No 2 'c
for CirCUit boards SYNC GENERATOR
-.
\-. Schematic Name
and Number |
ACEC
