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STEP 14
Verify
the
adjustments by performing
the check
procedure
in section 6.5
.
10.1
.
n
6.6
Audio
System
Check
/
Adjustment
Procedures
This
section contains
all check /
adjustment procedures for a
complete audio system alignment
of the APR
-
5000
Analog
Recorder
.
adjustment procedures
the
following prerequisites are
necessary
:
To ensure
optimum
results from the
audio
system
-
A l l test
equipment is in good working
order and
alignments
have
been verified
.
-
A l l test
tapes are in good condition
.
performance and mechanical
These
basic checks are
quite important
as all audio
adjustment
references rely
on
the
accuracy
of these
prerequisite adjustments
.
In
adjusting
the
APR
-
5000
audio
system
,
areas to cover
:
there are seven
major
-
Head
Alignment
Check /
Adjustment
-
Input Calibration
Check /
Adjustment
-
Meter Calibration Check /
Adjustment
-
Playback Calibration
Check
/
Adjustment
-
Record Calibration Check
/
Adjustment
-
Secondary Record Compensation
Check /
Adjustment
-
Bias
and Erase Check /
Adjustment
n
These areas are covered completly in the check
/
adjustment
procedures
to follow
.
The order in which the
check /
adjustment procedures
are listed will facilitate
optimum
results
.
As in all tape recorders
,
some of the
alignments
require
prerequisite
check /
adjustments
to be made
,
since
the later check /
adjustment procedures rely
on the
accuracy
of the
preceding adjustments
.
The APR
-
5000
audio
alignments
are
quite
stable
.
Hence
,
the
accuracy
is
maintained until
there
is a
desire
to implement a change
(
i
.
e
.
different tape formulation
,
new headstack
, different
reference
fluxivity
,
etc
.
)
.
As in the transport
check /
adjustment procedures
, if there
is a
part replaced
in
the audio
circuitry
,
the check
/
adjustment
'
procedures
that are
directly
effected
by
the
component change
should
be
performed
.
This is done to
verify
the performance of the new
component and to
ensure its
alignment
to the
specific
machine
.
6
-
40
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