Tektronix 1720 User Manual

Maintenance
6–4
1720/1721
Troubleshooting
The material contained here is general and is not intended to cover specific cases.
Note that the manual itself is considered a troubleshooting aid, and as such a
brief discussion of its content is in order.
The procedural information that appears as General Troubleshooting Techniques
should be familiar to most technicians; however, a quick review may save some
time and reduce “wheel spinning.”
The foldout pages at the back of the manual contain significant information
useful for troubleshooting the instrument. Block and schematic diagrams, circuit
board illustrations, and parts locating charts are found there.
Diagrams. Schematic diagrams are the most often used troubleshooting aids.
The circuit number and electrical value of each component is shown on the
diagram. The first tabbed page has definitions of the symbology used on the
schematic diagrams. Refer to the Replaceable Electrical Parts list for a complete
description of each component. Circuits that are mounted on circuit boards or
assemblies are enclosed in a border, with the name and assembly number shown
on the border.
NOTE. Change Information:
Check the Change Information section at the rear of the manual for corrections
and modifications to the instrument and the manual.
Circuit Board Illustrations
. Electrical components, connectors, and test points
are identified on circuit board illustrations, which are located on the back of a
preceding schematic diagram.
Parts Locating Charts
. Generally, components that are mounted on etched
circuit boards are assigned circuit numbers according to their geographic location
within the assembly, beginning with the lowest numbers at the upper left corner.
The schematic diagrams are assigned location grids, and a parts locating chart
(for each schematic diagram) gives grid locations of components on that
schematic.
Adjustment Locations
. The circuit board illustrations have the adjustments and
test points called out as a calibration and troubleshooting aid.
Assembly and Circuit Numbering
. The circuit board assemblies are assigned
assembly numbers. Figure 6-1 shows the circuit board assembly locations for
this instrument.
Foldout Pages

Tektronix 1720 Specifications

General

Brand	Tektronix
Model	1720
Category	Measuring Instruments
Language	English