Troubleshooting; Introduction; Troubleshooting Aids - Tektronix 2213 Instruction Manual

INTRODUCTION

Preventive maintenance performed on a regular basis
should reveal most potential problems before an instrument
malfunctions. However, should troubleshooting be required,
the following information is provided to facilitate location
o f a fault. In addition, the material presented in the
"Theory o f Operation" and the "Diagrams" sections o f this
manual may be helpful while troubleshooting.

TROUBLESHOOTING AIDS

Schematic Diagrams
Complete schematic diagrams are located on tabbed
foldout pages in the "Diagrams" section. The portions o f
circuitry that are mounted on each circuit board are
enclosed w ithin heavy black lines. Also w ithin the black
lines, near either the top or the bottom edge, are the
assembly number and name o f the circuit board.
Component numbers and electrical values o f compo­
nents in this instrument are shown on the schematic
diagrams. Refer to the first page o f the "Diagrams" section
fo r definitions o f the reference designators and symbols
used to identify components. Im portant voltages and wave­
form reference numbers (enclosed in hexagonal-shaped
boxes) are also shown on each diagram. Waveform illus­
trations are located adjacent to their respective schematic
diagram, and the physical location o f each waveform test
point is shown on the appropriate circuit board illustration.
Circuit Board Illustrations
Circuit board illustrations (showing the physical location
o f each component) are provided fo r use in conjunction
w ith each schematic diagram. Each board illustration can
be found on the back side o f a foldout page, preceding the
schematic diagram(s) to which it relates. If more than one
schematic diagram is associated w ith a particular circuit
board, the board illustration is located on a left-hand
page preceding the diagram w ith which the board is first
associated.
Also provided in the "Diagrams" section is an illus­
tration o f the bottom side o f the Main circuit board. This
drawing facilitates troubleshooting by showing the con­
nection pads and the location of components that are
mounted on the top side o f the board. Probing o f Main
board component signals that are inaccessible from the
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TROUBLESHOOTING

top side can be achieved w itho ut the necessity o f dis­
assembling portions o f the instrument.
circuit board illustration by hexagonal-outlined numbers
that correspond to the waveform numbers appearing on
both the schematic diagram and the waveform illustration.
Circuit Board Locations
w ithin the instrument is shown on the foldout page
adjacent to the circuit board illustration.
Circuit Board Interconnection Diagram
in the "Diagrams" section to aid in tracing a signal path or
power source between boards. The entire oscilloscope is
illustrated, w ith plug and jack numbers shown along w ith
associated pin numbers. The off-board components are also
shown, and the schematic diagram numbers on which
these components can be found are identified.
Power Distribution Diagram
troubleshooting
shows service jumpers used to remove power from the
various circuit boards. Excessive loading on a power supply
by a circuit board can be isolated to the faulty board by
disconnecting appropriate service jumpers.
Grid Coordinate System
has a grid border along its left and top edges. A table
located adjacent to each schematic diagram lists the grid
coordinates o f each component shown on that schematic.
To aid in physically locating a component on the respective
circuit board, this table also lists the circuit-board grid
coordinate o f each component.
numeric listing o f every component mounted on that
board. A second column in this listing identifies the
schematic diagram in which each component can be found.
These component-locator tables are especially useful when
more than one schematic diagram is associated w ith a
particular circuit board.
Waveform test-point locations are also identified on the
An illustration depicting the location o f a circuit board
A circuit board interconnection diagram is also provided
A Power Distribution diagram is provided to aid in
power-supply
Each schematic diagram and circuit board illustration
Adjacent to each circuit board illustration is an alpha­
Maintenance— 2213 Service
problems. This diagram
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