Preface
xiv
TDS 420A, TDS 430A & TDS 460A Service Manual
H Options contains information on the factory-installed options that may be
present in your oscilloscope.
H Electrical Parts List contains a statement referring you to the Mechanical
Parts List, where both electrical and mechanical modules are listed.
See below.
H Diagrams contains a block diagram and an interconnection diagram useful
for isolating failed modules.
H Mechanical Parts List includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.
Manual Conventions
This manual uses certain conventions which you should become familiar with
before doing service.
Throughout this manual, any replaceable component, assembly, or part of this
digitizing oscilloscope is referred to generically as a module. In general, a
module is an assembly, like a circuit board, rather than a component, like a
resistor or an integrated circuit. Sometimes a single component is a module; for
example, the chassis of the oscilloscope is a module.
Symbols and terms related to safety appear in the General Safety Summary and
Service Safety Summary found at the beginning of this manual.
Besides the symbols related to safety, this manual uses the following symbols:
STOP. This “stop sign” labels information which you must read in order to
correctly do service and to avoid incorrectly using or applying
service procedures.
The clock icon labels procedure steps which require a pause to wait
for the oscilloscope to complete some operation before you
can continue.
Various icons such as the example icon at the left are used in
procedures to help identify certain readouts and menu functions
on screen.
Modules
Safety
Symbols
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