Operating instructions

Corrective maintenance consists
of component replacement and instrument repair
. Special techniques required to replace
components in this instrument are
given here .
OBTAINING REPLACEMENT
PARTS
All electrical and mechanical part
replacements can be ob-
tained through your
Tektronix Field Office or representa-
tive . However,
many of the standard electronic
components
can be obtained
locally in less time than is required to
order
them from Tektronix, Inc . Before purchasing or
ordering
replacement parts, check the parts list for value, tolerance,
rating, and description .
1 . Instrument type .
NOTE
When selecting
replacement parts, remember
that the physical
size and shape of a component
may affect the
performance of the instrument,
particularly at high
frequencies . All parts
should be
direct replacements unless a different
component will
not adversely affect instrument
performance .
Some parts
are manufactured or selected by Tektronix,
Inc .
t o
satisfy particular requirements, or are manufactured to
specifications for
Tektronix, Inc . Most of the mechanical
parts
used in this instrument have been manufactured by
Tektronix, Inc . To determine the manufacturer of
parts,
refer to parts list, Cross Index
Mfr . Code Number to
Manufacturer .
When ordering replacement parts from Tektronix,
Inc
.,
in-
clude the following information :
2 . Instrument serial
number .
3 . A description of the part (if electrical, include
circuit number) .
4 . Tektronix part number .
SOLDERING TECHNIQUES
WARNING
J
To avoid electrical shock, disconnect
the instru-
ment from the power source before
soldering .
CORRECTIVE MAINTENANCE
Maintenance-71380
The reliability
and accuracy of this instrument can be main-
tained
only
if proper
soldering techniques are used when re-
pairing or
replacing parts . General soldering techniques,
which apply to maintenance of any precision
electronic
equipment, should be used when
working on this instru-
ment . Use only 60/40 rosin-core,
electronic-grade solder .
The choice of soldering iron is determined
by the repair to
be made . When soldering on circuit
boards, use a 15- to
40-watt pencil-type soldering iron
with a 1/8-inch wide,
wedge-shaped tip . Keep
the tip properly tinned for best
heat transfer to
the solder joint . A higher wattage soldering
iron may
separate the wiring from the base material . Avoid
excessive heat ; apply
only enough heat to remove the com-
ponent or to
make
a
good solder joint . Also, apply only
enough solder to
make
a
firm solder joint ; do not apply too
much solder .
All circuit boards, except the readout
circuit
board, in this instrument are multilayer type
boards with a conductive path (s) laminated be-
tween the top and bottom board layers . All
soldering on these boards should bedone
with
extreme care to prevent breaking
the connections
to the center
conductor(s) ; only experienced
maintenance personnel should attempt repair
of these boards .
For metal terminals (e .g ., switch
terminals, potentiometers,
etc .), a higher wattage-rating soldering
iron may be required .
Match the soldering iron to
the work being done . For ex-
ample, if the component is connected to the chassis or
other large heat-radiating surface, it will require a 75-watt
or larger soldering iron .
The following techniques should be used to replace a
com-
ponent on a circuit board :
1 . Grip the component lead with
long-nose pliers . Touch
the soldering iron to the lead at the
solder connection . Do
not lay the iron directly on the board, as
it may damage the
board .
4- 9