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Generaf
Infornation
-
4g4[l4g4Ap
Service,
Vol.
1
throughout
the
United
StatEs
and
in
countries
wherE our
products
are
sold.
Several
types of
maintenance
or
repair agreements
are
available.
For
example,
for
a fixed
fee, a
maintenance
agree-
ment
program
provides
maintenance
and
recalibration
on
a regular
basis.
Tektronix
will
remind
you
when
a
product
is
due
for r€calibration
and
perform
the
service
within
a specifi€d
time.
.
Tektronix
emergency
repair
service
provides
immediate
service
when
the
instrument
is
urgently
needed.
Contact your
local
Tektronix
SeMce
Center,
representativer
or
sales
engineer
for
details
regarding
product
service.
I nstrument
Construction
Modular
construction
provides
ready
access
to
the
major circuits.
Circuit
boards
containing
sensitive
cir_
cuits
are
either
mounted
on
metal
castings,
each of
which
provides
shielding
between
adjacent
modules,
or
they
ars
mounted
within
honeycomb-like
castings,
with
feedthrough
connectors
through
the
compartment
wall.
All
boards
and
assemblies plug
onto
a
common
inter-
connect
board. Most
adjustm€nls
and
test
points
are
aecessible
while
the anstrument
is operational
and
with
the modules
or assemblies
secured
in
their
normal posi_
tion.
Extenders
are available
in
an optional
Service
Kit
(see
Maintenance
section
under
Service
Fixtures
and
Tools
for
Maintenance).
Any
module
or
board
can
be
removed
without
disturbing
the structural
or
functional
integrity
of
the other
modules.
The
extenders
allow
most circuit
board assemblies
to
function
in an
extended
position
for
service
or adjustment.
The
circuit
boards
mounted
on
the
metal
casting
can
be removed
by
removing
the securing
screws.
All
other
circuit
boards
(which
should
require
minimal
service)
are
accessible
by
removing
a cover plate
over
the assembly
or module.
Disassembly
of
some
modules
may
require
special
tools
and
procedures.
These pro_
cedur€s
are
located
in
the
Maintenance
section.
Circuits are
isolated
in
shielded
compartments
to
obtain
and
maintain
th€
frequency
stability,
sensitivity,
and
EMI characteristics.
While
shielding
hetps
ensuie
spurious-free
response,
the
closeness
of
the
circuits
minimizes
losses
and
interactions
with
other
functions.
1-2
Compartments
are
enclosed
on
both sides
by
metal
plat€s
and
interconn€ctions
between compartments
are
made
by feedthrough
terminals rather
than
cables.
lf
the
compartments
are
opened,
be sure
that
the
shields
and
covers
are
properly
reinstalled
before
operating.
Installation
and Preparation
for
Use
The
Installation
section
of
the manual
provides
unpacking information
and
the
procedures
to
prepare
the
instrum€nt
for
use.
lt also includes
repackaging
information.
Changing
Power
lnput Range
The
procedure
for changing
the input
voltage
range
is
described in
the Installation section.
Details on
how
to
change
the line
fuse
are
also
given.
The
power
cord
that
is
supplied with
the instrument
and
the
instrument power
voltage
requirements
depend
on
the
available pow€r
source (see
Specification
sec-
tion).
Power
cord options are
described in
the
Options
section.
Replacing
Fuses
Refer
to the Installation section
for
line
fuse
replace-
ment and
the Maintenance
section
for
replacing
the
power
supply
fuses.
Selected
Components
Some components are
selected,
matched, or
pre-
conditioned
to
meet Tektronix
specifications.
These
components
are shown
in
the
parts
list
and may
carry
a
Tektronix Part
Number under
the
Mfr.
Part
Number
column.
Selected
value
components are identified on
the
cir-
cuit
diagram
and
in
the
parts
list as a
'SEL"
value.
The
component
d€scription
lists either
the
nominal value or
a range of
values.
Selection
criteria
is
included in
the
Maintenance
section.
Selection
procedures
are
included
in
the Adjustment
Procedure or
Maintenance
sections of
the manual
as
needed.
Assembly
and
Circuit
Numbering
Each assembly
and
subassembly are assigned
assembly
numbers.
Generally, each component is
assigned
a circuit
number according
to
its
geographic
location
within an
assembly.
The
Replaceable
Electrical
Parts list
prefixes
these
circuit
numbers
with
the
corresponding
assembly
and subassembly
numbers.
o
o
o
t
a
t
o
o
o
a
I
a
o
a
o
a
o
o
o
I
a
o
o
o
o
o
I
a
a
I
o
o
o
a
I
o
a
a
o
o
o
o
o
a