Maintenance and
Troubleshooting—MicroLab
|
Instruction
Exterior
Clean
the dust
from
the outside
of
the equipment
by
cleaning
the surface
with
a
soft cloth or
brush.
The
brush
will
remove
dust
from
around the
front panel
selector
buttons.
Hardened
dirt may be removed
with
a
cloth
dampened
in
water that contains
a
mild
detergent.
Abrasive
cleaners should
not be used.
Interior
Clean
the interior
by
loosening
accumulated
dust
with
a dry
soft
brush, then
blow
the loosened
dirt away with
low-
pressure
air.
If
the
circuit board
assemblies
need
cleaning,
remove
the circuit
board
and clean
with
a
dry, soft
brush.
Hardened dirt
or
grease
may be removed with
a
cotton-
tipped applicator
dampened
with a solution
of mild
detergent and water.
Abrasive
cleaners
should not be used.
After
cleaning, allow
the
interior
to
dry
thoroughly
before
applying
power
to
the
equipment.
CAUTION
Do
not allow
water
to
get
inside any enclosed
assembly
or
components, such
as
switch assemblies,
memory
capacitors,
potentiometers,
etc.
Instructions
for removing
assemblies
for
maintenance are
provided
in
the
Corrective
Maintenance part of this
section.
Do
not clean any plastic materials
with
organic cleaning solvents
(such
as
benzene,
toluene,
xylene,
acetone,
or
similar
compounds); they may
damage
the
plastic.
Visual
Inspection
After
cleaning,
carefully check
the equipment
for
such
defects as
defective
connections and
damaged
parts.
The
remedy
for
most
visible
defects
is
obvious.
If
heat-damaged
parts
are discovered,
try
to
determine the cause
of
overheating
before replacing the
damaged
part;
otherwise,
the damage
may
be repeated.
7-2
Troubleshooting
Your
Tektronix Service Support
Center
is
best
suited to
perform
repairs
on
this
unit.
However,
the
following
general
troubleshooting
procedures
may
aid
you
in
tracing
a
problem
to its
source.
Before beginning any
troubleshooting
work,
check
your
warranty
or
service
agreement.
To
prevent
voiding
the
warranty,
all
service must
be performed
by
Tekronix,
Inc.
for
the
first
90
days following
delivery.
Troubleshooting
Aids
Diagrams
Circuit
diagrams
are
given on foldout pages
in
the
Diagrams
section
of
the
manual.
The
circuit number and
electrical value
of
each
component are shown
on the
diagram.
(See
the
first
tab
page
for
definition
of
the
symbols
used
to
identify
components
in
each
circuit.) Components
on circuit
boards are assigned
vertical
and
horizontal
grid
numbers
which
correspond
to
the
location
of
the
component
on
the
circuit board. Refer to the Replaceable
Electrical
Parts
List
section
for
a
complete description
of
each component and
assembly.
These
portions
of
the
circuit
that
are
on circuit
boards
are
enclosed
with
a
black
border
line,
with the name
and
assembly
number shown
on,
the
border.
NOTE
Corrections
and
modifications
to
the
manual
and
equipment
are
described
on
inserts
bound
into
the
rear of
the manual.
Check
this
Change Information
section
for
manual
or
instrument changes and
corrections.
Circuit
Board
Illustrations
Electrical
components, connectors, and test
points are
identified on circuit
board
illustrations
located
on the inside
fold
of
the corresponding
circuit diagram, or on the
back
of
the
preceding
diagram.
This allows
cross-referencing
between
the
diagram
and
the circuit
board,
and shows
the
physical location
of
components.
Summary of Contents for 067-0892-00
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