Section 9— 2246 1Y and 2246 Mod A 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/IEEE 91-1984.
Logic symbols depict the logic function performed and may
differ from the manufacturer’s data.
The overline on a signal name indicates that the signal
performs its intended function when it is in the LO 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
Drafting Practices.
Y14.2M-1979
Line Conventions and Lettering.
ANSI/IEEE 280-1985 Letter Symbols for Quantities
Used in Electrical Science
and Electrical Engineering.
American National Standards 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 (/iF).
Resistors
Ohms (Q).
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).
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 thefacing
diagram are listed in the lookup table. When more than
one schematic diagram is used to illustratethe 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.
Function Block Title
Internal
Screwdriver
Adjustment
Cam Switch
Closure Chart
(Dot indicates
switch closure)
Etched Circuit Board
Outlined in Black
Refer to Waveform
Function Block
Outline
1C type
Test Voltage
Heat Sink
Board Name
P/O — Part of
circuit board
Assembly Number
Tektronix Part No.
for circuit boards
A
B
C
D
-I_______________________________ i ____ —
__________
- t ____________________________ i ___
M o d i f i e d
C o m p o n e n t
(Depicted in Grey, or With
Grey Outline) - See Parts Ust.
Strap or Link
Plug to E.C. Board
{ B o x ]- Identifies Panel
Controls, Connectors and
Indicators
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
Summary of Contents for 2246 1Y
Page 13: ...2246A Service 7062 01 X The 2246 1Y or 2246 Mod A Portable Oscilloscope ...
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Page 278: ...Figure 9 5b Detailed 2246 1Y or 2246 Mod A block diagram part 2 R E ...
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Page 304: ...A D D J U N 1991 ...
Page 311: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 1 0 V r l III B f e I l i 6555 39 ...
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Page 321: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 2 SET READOUT CONTROL CCW OFF 6555 40 ...
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Page 326: ...A B C P E F G ...
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Page 347: ...BEV JUNE 1991 7062 18 ...
Page 349: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 6 6555 43 I ...
Page 355: ...I BOARD LOCATION 8K 8J 8H 7H 8H 8H 7J 8D 7H 8H 8J 8J 7K 8K 10D 6L 6K 6L 6K 6G 5H I ...
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Page 372: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 9 MORE ...
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