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8
Check if the individual values measured in steps
3 ,
and
7
are within the following ranges.
i)
Azimuth
ii)
Off track
-9 to +9 minutes (each track)
-50 to +50 micrometers (each track)
5
9
When
only
check
may
be
made,
successively
follow
the
procedure given in item (d).
Note
1: As
for
the
above-mentioned
check,
key
in
"F"
successively,
and
repeat
measurement
on
each
track
three times or more,
and then decide the measurement
values.
2: When the check is made with the burst signal VI less
than 1.3 Vpp, no data may be displayed on SOA.
Since
this means that the value is out of the specification,
execute the alignment adjustment.
3: As for the values displayed on SOA, DATA 1
I
+
I
I
2.
I
31
means 2.3 minutes,
and DATA 2
I +.1
0
I
1
I
9
I
means
19
micrometers.
4: If the measured azimuth value are out of the specifi-
cation,
1+ I 1
0
I
F
I
is
indicated
on
the
DATA
1
display.
(c)
If the results of measurement in item (b) are out of the specifi-
cations, make the alignment adjustment with the adjusting screws
in the following procedure (Fig. 426).
1
Key in "5" on rewind the tape.
2
Key in "A22", and further "0", and adjust each burst signal
of
tack 2 displayed on the oscilloscope as follows
(Fig.
425).
(i)
Azimuth
Turn the azimuth adjusting screw until the
difference between V4 and V5 is minimized.
(ii)
Off track: Turn the off track adjusting screw A until
the
difference
between
V2
and
V3
is
minimized.
3
Key in "F" to stop the operation.
- 4044 -
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