Operating instructions
Maintenance----7B87
CAM
SWITCH
LUBRICATION
In
most
cases,
factory
lubrication
should be
adequate
for
the
life
of
the instrument
.
However,
if
the
switch
has
been
disassembled
for
replacement
of
switch
sub-parts,
a
lubrication
kit
containing
the
necessary
lubricating
materials
and
instructions
is
available
through
any
Tektronix
Field
Office
.
Order
Tektronix
Part
003-0342-01
.
General
Electric
Versilube?
silicone
grease should be
applied
sparingly
so
that
the
lubricant
does
not
get
on
the
contacts
.
Refer
to
Figure
4-1
for
lubrication
instructions
.
SEMICONDUCTOR
CHECKS
Periodic
checks
of
the
semiconductors
in
this
instrument
are not
recommended
.
The
best
check
of
semiconductor
performance
is
actual
operation
in
the instrument
.
More
details
on
checking
semiconductor
operation
are given
under
Troubleshooting
.
ADJUSTMENT
AFTER
REPAIR
After
any
electrical
component
has
been
replaced,
the
adjustment
of that
particular
circuit
should be checked,
as
well
as
the
adjustment
of
other
closely
related
circuits
.
The
Performance
Check
and
Adjustment
procedure
in
this
manual
provides
a
quick
and
convenient
means
of
checking
instrument operation
.
In
some
cases,
minor
troubles
may
be
revealed
or
corrected
by
adjustment
.
TROUBLESHOOTING
AIDS
DIAGRAMS
VOLTAGES
AND
WAVEFORMS
4-
2
TROU
Circuit
diagrams
are given on
foldout
pages
in
section
8
.
The component
number
and
electrical
value
of
each
component
in
this
instrument
is
shown
on the
diagrams
.
Components
that
are
mounted
on
circuit
boards
are
outlined
on
the
diagrams
with
a
heavy
black
line
.
Typical
operating
voltages
are
shown
on the
diagrams
.
Voltage
conditions
given
on
the
diagrams page
indicate
the
test
equipment
used
and
the
front-panel
control
status
necessary
to
obtain
the
given
voltages
.
Apply
lubricant
to
the
drum
journals
and
mating
surface
in
the
mounting
bearings
.
Apply
lubricant
to
the
wear
surface
of
the
index
wheel
.
Apply
lubricant
to
the
index
roller
and
roller
guide
in
the
front
bearing
.
A
thin film
should
be
applied
to
the
inner
face
of
the detent
springs
if
more
than
one
spring
is
replaced
.
Ensure
that
some
lubricant
is
present
at
the
interface
between
the
bearing
and
retainer
clip
.
Figure
4-1
.
Lubrication
procedure
for
a
typical
cam
switch
.
IN
The
following
information
is
provided
to
help
troubleshoot
this
instrument
.
Information
contained
in
other
sections
of
this
manual
should be
used
along with the
following information
to
aid
in
locating
the defective
component
.
An
understanding
of
the
circuit
operation
is
very
helpful
in
locating
troubles,
particularly
where
integrated
circuits
are used
.
Typical
operating
waveforms
are
shown
next
to
the
diagram
where
they
were measured
.
Each
waveform
is
numbered
to
locate
on
the
diagram
the
point
where
the
waveform
was
taken
.
Waveform
Conditions
given on the
diagram
page
list
the
test
equipment
used
and
the
front-
panel
control
status
necessary
to
obtain the
given
waveform
.
CIRCUIT-BOARD
ILLUSTRATIONS
Circuit-board
illustrations
are
shown
on
the
foldout
page
preceding the
associated
diagram
.
Each
board-mounted
electrical
component
is
identified
by
its
circuit
number,
as are
interconnecting
wires
and
connectors
.