Philips PM3208 - 5 Performance Check and Adjustment Procedure; 5.1 General Information

5
PEHFORMANCE
CHECK
AND
ADJUSTMENT
PROCEDURE
5
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5
PERFORMANCE
CHECK
AND
ADJUSTMENT
PROCEDURE
5.1
GENERAL
INFORMATION
The
following
information
provides
the
complete
performance
check
and
adjusting
procedure
for
the
instrument.
The
performance
check
procedure
provides
in
indication
whether
an
adjustment
has
to
be
performed
or
not.
If
no
adjustment
is
needed,
this
is
indicated
by
NO.
As
various
control
functions
are
interdependent,
a
certain
order
of
adjustment
is
necessary.
The
performance
check
and
adjustment
procedure
is,
therefore,
presented
in
a
sequence
which
is
best
suited
to
this
order,
cross-reference
being
made
to
any
circuit
which
may
affect
a
particular
adjustment.
Before
any
adjustment,
the
instrument
must
attain
its
normal
operating
temperature.
_
Warming-up
time
under
average
conditions
is
30
minutes.
_
All
limits
and
tolerances
given
in
this
section
are
calibration
guides
and
should
not
be
interpreted
as
instrument
specifications,
unless
they
are
also
published
in
section
2
"CHARACTERISTICS'
of this
service
manual.
-
Tolerances
given
are
for
the
instrument
under
test
and
do
not
include
test
equipment
error.
_
The
most
accurate
display
adjustments
are
made
with
a
stable,
well-focussed
low
intensity
display.
—
Alt
controls
which
are
mentioned
without
item
numbers
are
located
on
the
outside
of
the
instrument.
WARNING:
The
opening
of
covers
or
removal
of
parts,
except
those
to
which
access
can
be
gained
by
hand,
is
likely
to
expose
live
parts
or
live
terminals.
The
instrument
shall
be
disconnected
from
all
voltage
sources
before
any
adjustment,
replacement
or
maintenance
and
repair
during
which
the
instrument
will
be
opened.
If
afterwards
any
adjustment,
maintenance
or
repair
of
the
opened
instrument
under
voltage
is
inevitable,
it
shall
be
carried
out
only
by
a
qualified
person
who
is
aware
of
the
hazard
involved.
Bear
in
mind
that
capacitors
inside
the
instrument
may
still
be
charged
even
if
the
instrument
has
been
separated
from
all
voltage
sources.
5.1 GENERAL INFORMATION