I
!
from
Tektronix,
Inc. Before purchasing or ordering replace-
ment
parts, check
the
parts list for value,
tolerance,
rating,
and description.
NOTE
When
selecting replacement parts,
it
is
important
to
remember that the physical size and shape
of
a
component may affect its performance
in
the instru-
ment, particularly at high frequencies.
All
replace-
ment
parts should be direct replacements unless
it
is
known that a different component will
not
adversely
affect instrument performance.
Special Parts.
In
addition
to
the
standard
electronic
components,
some special
components
are used
in
the
465.
These
components
are
manufactured
or selected
by
Tek-
tronix,
Inc.
to
meet
specific
performance
requirements, or
are
manufactured
for
Tektronix,
Inc.
in
accordance with
our
specifications. These special
components
are indicated
in
the
Electrical Parts List by an asterisk preceding
the
part
number.
Most of
the
mechanical parts used
in
this
instrument
have been
manufactured
by
Tektronix,
Inc.
Order
all
special parts
directly
from
your
local TEK-
TRONIX
Field Office
or
representative.
Ordering Parts. When ordering
replacement
parts from
Tektronix,
Inc., it
is
imperative
that
all
of
the
following
information
be included
in
the
order
to
ensure receiving
the
proper
parts.
1.
Instrument
type.
2.
Instrument
serial
number.
3.
A description
of
the
part
(if electrical, include
the
circuit
number).
4.
TEKTRONIX
Part
number.
Soldering Techniques
I
WARNING
I
Always disconnect the instrument from the power
source before attempting to solder in the instrument.
Ordinary
60/40
solder and a 35-
to
40-watt
pencil-type
soldering iron can be used
to
accomplish
the
majority
of
the
soldering
to
be
done
in
the
465.
If
a higher wattage-
rating soldering iron
is
used
on
the
etched
circuit
boards,
excessive
heat
can cause
the
etched
circuit
wiring
to
separate
from
the
board
base material.
®
The
Vertical Preamplifier Attenuator circuit boards
are
made
of
material easily damaged
by
excessive
heat. When soldering to these boards, do
not
use a
Maintenance-465
soldering iron with a rating
of
more than approxi-
mately
15
watts. Avoid prolonged applications
of
heat to circuit-board connections.
Use
only isopropyl
alcohol when cleaning this circuit board.
When soldering
to
the
ceramic strips
in
the
instrument
a
slightly larger soldering iron can be used. It
is
recommended
that
a solder containing
about
3% silver be used when
soldering to these strips
to
avoid
destroying
the
bond
to
the
ceramic material. This
bond
can 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
excessive
heat
is
not
applied.
If it becomes necessary
to
solder
in
the
general area
of
any
of
the
high-frequency
contacts
in
the
instrument,
clean
the
contacts
immediately
upon
completion
of
the
soldering.
Refer
to
the
section
entitled
Switch
Contacts
under
PREVENTIVE MAINTENANCE
for
recommended
cleaners
and procedures.
Component Replacement
I
WARNING
I
Always disconnect the instrument from the power
source before attempting to replace components.
Circuit Board Replacement. Occasionally it may be
necessary
to
gain access
to
the
reverse side
of
a circuit
board
or
to
remove
one
circuit
board
to
gain access
to
another.
The
following
procedures
outline
the
necessary
steps
to
facilitate
instrument
disassembly. Most
of
the
connections
to
the
circuit
boards
in
the
instrument
are
made
with pin
connectors.
However,
some
connections
are
soldered
to
the
board. Observe
the
soldering precautions
given
under
Soldering
Techniques
in
this
section.
Vertical Preamp Assembly Removal.
1. Remove
the
instrument
wrap-around
cabinet
in
the
manner
given
under
Cabinet Removal earlier in this section.
2. Remove
the
knobs
from
the
VOL
TS/DIV
switches
and
from
the
Input
Coupling
Switches.
The
knobs on
the
VOLTS/DIV switches
must
have a setscrew in each
one
loosened (using a 1
/16"
Allen
wrench)
before
they
can be
removed, while
the
knobs
on
the
Input
Coupling switches
can be pulled
off
by
hand.
3.
Disconnect
the
vertical POSITION control
shaft
couplers from
the
vertical POSITION
potentiometers
(.050"
Allen wrench required).
4-3
To Next Page
Loading...
Need help?
General
