Tektronix 5103N

System Maintenance—51 03N
of each diagram section for definition of
the reference
designators used to
identify
components in each unit). Each
main circuit is assigned a series
of
component
numbers.
Important
voltages and
waveforms
are also shown
on
the
diagrams. The portions of the
circuits mounted
on
circuit
boards are enclosed with blue lines.
Cam Switch
Contact Identification.
Cam switches
shown
on
the diagrams are coded to indicate the
position of
the contact
in
the complete
switch
assembly
counting from
the front, or knob end of the
switch,
toward the
rear. The
contact closure chart
given
on the
diagrams
indicates when
each
contact is
closed.
Circuit
Boards.
Pictures
of
the circuit
boards
are
shown
in the
diagram
sections.
These
pictures
are
located
near
their
respective
associated
schematic
diagrams
to
aid in
cross
reference
between
the
diagrams
and
the
circuit
board
pictures.
Where
applicable,
circuit
boards
are
identified
by
assembly
numbers,
which
are
used
on the
diagrams
and
in
the
parts
lists
to aid
in locating
the
boards.
Each
electrical
component
on the
boards
is
identified
by its
circuit
number.
The
circuit
boards
are also
outlined
on the
dia-
grams with
a blue
line
to show which
portions
of the
circuit
*
are
located
on a
circuit board.
Component
and Wiring
Color
Code.
Colored
stripes
or
dots
on
resistors
and
capacitors
signify
electrical
values,
tolerances,
etc.,
according
to the EIA
standard
color code.
Components
not color
coded usually
have
the
value
printed
on
the body.
WARNING
This
color
code
applies
to leads
within
the
5100-
Series
Oscilloscope
system
only.
Color
code of
the
AC
power
cord is:
Black
Line
White
Neutral
Green
with
a yellow
stripe
Safety
Earth
(ground)
Fig. 4-1.
Electrode
configuration
data
for
semiconductor
devices.
4-2