9-11705A
Diagrams/Circuit Board Illustrations

Symbols

Graphic symbols andclass 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 logicfunction performed and may differ from the manufacturer’sdata.
Overline, parenthesis,or leading slash indicate a low asserting state.
Example: IDCONTROL, (ID CONTROL ), or /ID CONTROL.
Abbreviations arebased on ANSI Y1.1--1972.
Other ANSI standardsthat 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 ElectricalEngineering.
AmericanNational Standard Institute
1430 Broadway,New York, New York 10018

Component Values

Electricalcomponents shown on the diagrams are in the following units unless noted
otherwise:
Capacitors: Valuesone o r greater are in picofarads (pF).
Valuesless than one are in microfarads (F).
Resistors = Ohms (Ω).
Thefoll owing information and special symbols may appear in this manual.

Assembly Numbers

Each assemblyin the instrument is assigned an assembly number (e.g., A20). The
assembly numberappears on the diagram (in circuit board outline), circuit board illustra-
tion title, and lookup table for the schematic diagram.
The Replaceable Electrical Parts List is arranged by as sembly number in numerical
sequence;the components are listed by component number. Example:
Chassis--mountedcomponents
haveno Assembly No. prefix.
Seeend of Replaceable Electrical
PartsList
Assembly
Number
ComponentNumber
A23 A2 R1234
Subassembly
Number(i f used) SchematicCircuit
Number

Grid Coordinates

The schematicdiagram and circuit board component location illustration have grids. A
lookup table with the gridcoordinates is provided for ease of locating the component.
Only the components illustratedon the facing diagram are listed in the lookup table.
When morethan one schematic diagram is used to illustrate the circuitry on a circuit
board, the circuitboard illustration will only appear opposite the first diagram; the lookup
table will list the diagram number of otherdiagrams that the other circuitry appears on.
WIRESTRAP
MODULE
PLUG
P1 NEGATIVE
PORTS
ICTYPE
CHANGED
PART
+12V
DECOUPLEDOR
FILTEREDVOLTAGE
R500
20K
+12V3
REAR
PANEL
INPUT
BNC
J1
(FEMALE) PAD FRONTPANEL
NOMENCLATURE
C1
10UF
2
36
7
4
U1
741
---12V
R5
1.0 NC
ROTATE
H
HEATSINK
2
REFERTO
WAVEFORM
123
J1
R4
20K Q8
W4
0OHM
+11.8V +15V
---11.8V
TP1
/VIDEO
(VIDEO)
R55
100.0
CLOCKWISE
AJUSTMENT
1
2
J3 12
W751
A3
ANALOG
BOARD
SCHEMATIC&
BOARDREF
PARTNAME,
2
R100
R85
SEL
SEEPARTS LIST
FORSELECTION
CRITERIA
SQUAREPIN
CONNECTOR
PARTOFA1 MAIN BOARD
R56
100.0
Q6
---15V
SEEPARTSLIST FOR
EARLIERVALUESAND
SERIALNUMBERRANGES.
C27
0.1UF
SCREWDRIVER
ADJUSTMENT
CIRCUITBOARD
OUTLINE
&SNUBBER
BASEDRIVE
TITLE
FUNCTIONBLOCK
INSTRUMENTNAME
SCHEMATICNAME& NUMBER ASSEMBLYNUMBER
VERTICAL INPUT 1
A1
COMPONENTLOCATORGRID