Corrective Maintenance; Diagnostic Testing And Troubleshooting; Introduction; Troubleshooting Techniques - Fluke 93 Service Manual

CORRECTIVE MAINTENANCE
7-1
7
CORRECTIVE MAINTENANCE
7.1
DIAGNOSTIC TESTING
AND TROUBLESHOOTING
7.1.1
Introduction
The
ScopeMeter
provides semimodular design
to
aid
in
troubleshooting.
This section
describes
procedures
needed
to isolate
a
problem
In
a
specific functional area.
Finally,
troubleshooting
hints for
each
functional
area are presented.
If
the
ScopeMeter
fails, first
verify that
you are
operating the
ScopeMeter
correctly
by reviewing the
Operation
Venficatlon Procedure found
in
the
Users Manual.
WARNING:
Opening
the
case
may
expose hazardous
voltages.
Always
disconnect the
instalment
from
all
voltage sources
and remove
the batteries before
opening
the
case.
Remember
that repairs
or
servicing
should be performed by
qualified
personnel
only.
7.1
.2
Troubleshooting techniques
If
a
fault
appears,
the following
test
sequence can be used
to
help
you
to
locate the defective
component:
•
Check
to
verify that
the
control settings
of
the
instrum^t
are
correct.
Consult the operating
instructions
in
the
Users Manual.
•
Che<A
the
equipment
to
which
the ir^strument
is
connected
and check
the interconnection cables.
•
Verify that
the instrument
is
properly
calibrated.
If
It
is
not, refer to
Chapter
5:
'Calibration
Adjustment P^ocedure^
•
Locate the
circuit{6)
in
which you suspect the
fault:
the
symptom
often
suggests
the
faulty circuit.
If
the
power
supply
is
defective,
the
symptom may
appear
to
be caused
by
several
circuts.
•
Check
the
drcult(s)
In
which you suspect
the
fauH.
Often
it
is
possible to
find faults
such as
cold
or defective solder
joints,
intermittent
or
open
interconnection plugs
and
wires or
damaged
components.