Maintenance
—
Type
575
Fig.
4-2 The
method used to remove
or
replace
the
calhodc-ray
tube.
counterclockwise,
and
pull
off
the
panel.
In order
to
prevent
damage
to
the
finish
of
the
side
panels,
you
should remove
them
before
laying
the
instrument
on
its
side.
The
bottom
panel
should
then
be
removed
last.
Panels are
replaced
by
reversing
the
order
of
their
removal.
strument.
If tubes
do
require
replacement,
it
is
recommended
that
they
be
replaced
by
previously
checked
high-quality
tubes.
Soldering Precautions
In
the production of
Tektronix instruments,
a
special
silver-
bearing
solder
is
used
to
establish
a
bond
to
the
ceramic
terminal
strips.
This
bond
may
be
broken
by
repeated
use
of
ordinary
tin-lead
solder,
or
by
the
application
of
too
much
heat.
However,
occasional
use
of
ordinary
solder
will not
break
the
bond
if
too
much heat
is
not
applied.
It
is
advisable
that
you
have
a stock
of solder
containing
about
3%
silver
if
you
frequently
perform
work
on
Tektronix
instruments.
This
type
of solder is
used
quite often
in
printed
circuitry
and
should
be
readily
available.
It
may also be
purchased
directly
from
Tektronix
in
one-pound
rolls
(order
by
part
number
251-514).
Because
of
the
shape
of
the
terminals
on
the
ceramic
ter
minal
strips, you
may
wish
to
use
a
wedge-shaped tip
on
your
soldering
iron.
A
tip
such
as
this
allows
you
to
apply
heat
directly
to
the
solder
in
the
terminals and
reduces
the
amount
of
heat
required.
It
is important
to
use
os
little
heat
as
is
possible.
Replacement of Cathode-Ray
Tube
To
remove
the
cathode-ray
tube,
first disconnect
the tube
socket
and
all
leads
connected
to the
neck
of
the
tube.
Loosen
the
tube
clomp
at
the
base
of
the ert
and
removo
the
graticule
cover.
Pull
the
ert
straight
out
through
the
front
panel.
When
the
now
ert
is
in
place,
the
leads
may
be
properly connected
to
the
neck
of
the
tube
by
following
the
color
code
information
provided
on
the
tube
shield.
After
replacement
of
a
ert,
it
will
be
necessary
for
you
to
recali
brate
the
instrument.
Replacement of
Switches
Methods
for
removal
of
defective
switches
are,
for
the
most
part,
obvious
and
only
a
normal
amount
of care
is
required.
Single
wafers
are normally
not replaced
on
the
switches
used
in
the
Type 575
and
if
one
wafer
is
defective,
the
entire
switch
should
be
replaced.
Switches
may
be
ordered from
Tektronix
either
wired
or
unwired as
desired.
Tube
Replacement
Care should
be
taken
both
in
preventive
and
corrective
maintenance
that
tubes
are
not
replaced
unless they are
ac
tually
causing
a
definite
circuit
malfunction. Many
times
during
routine
maintenance
it
will
be necessary for you
to
remove
tubes
from
their
sockets.
It
is
important that these
tubes
be
returned
to
the
same
sockets
unless
they
are
ac
tually
defective.
Needless
replacement
or switching
of
lubes
will
many
times
cause
unnecessary
rccalibration
of
the
in-
REPLACEMENT PARTS
Standard
Parts
Replacements
for
all
parts
used
in
the
Type
575
Transistor-
Curve
Tracer
can
be
purchased
directly
from
Tektronix
at
current
net
prices.
However,
since most
of
the
components
are standard
electronic
parts,
they
can
generally
be
obtained
locally
in
less
lime
than
is
required
to
obtain
them
from
the
factory. Before ordering or
purchasing
parts,
be
sure
to
con
sult
the
parts
list
to
determine
the
tolerance
required.
The
parts
list
gives
the
values, tolerances,
and
Tektronix
part
num
bers
of all components
used
in
the
instrument.
Special
Parts
In
addition
to
the
standard
parts
used
in
the
instrument,
special
pads
arc used
also. These
parts
are
manufactured
or
specially
selected
by Tektronix,
or
are
made
especially
for
Tektronix
by
other
manufacturers.
Special
parts
and
most
mechanical
parts
should
be
ordered
directly
from
Tektronix
since
they
will
normally
be
difficult
or
impossible
to
obtain
from
other
sources.
Special parts
may be
obtained
cither
from
the
factory
or
from
the
local
Tektronix
Field
Engineering
Office.
Since
the
production
of
your
instrument,
some of
the
Tek
tronix
manufactured
components
may
have
been
superseded
by improved
components.
The
part
numbers
of
these
new
components
will
not
be
listed
in
your
manual.
Your
Tek
tronix
Field
Engineering
Office
has
a
knowledge
of
these
changes
and
may call
you
if
a
change
in
your
purchase
order is
necessary.
4-2
Summary of Contents for 175
Page 4: ...VWTICM OINltAlO TRANSISTOR CUM TRACfR UB l COUlClO r hokizoniai VCKIJ O lUnK Hix M Type 575 z ...
Page 6: ...NOTES ...
Page 26: ...NOTES ...
Page 48: ...NOTES ...
Page 54: ...Recalibration Type 575 C706 Fig 5 3 Left Side View 5 6 ...
Page 56: ...NOTES ...
Page 100: ...INPUT AMPLIF1E ...
Page 104: ...TYPE 575 TRANSISTOR CURVE TRACER ...
Page 108: ...OSCILLATOR 4OOV UNREG TYPE 575 TRAN5I5TOR CURVE TRACER AB ...
Page 115: ... 300 ...
Page 119: ...Type 175 Tent S N 570 PARTS LIST CORRECTION Change to Q233 151 0137 00 2N21U8 MIO 298 1165 ...
