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a.
Insert an alignment flexible disk.
b.
Step the carriage to track 01.
c.
Load the heads.
d.
Observe the timing between the trailing edge of the
index pulse and the first peak of the read waveforms
(see Figure 5-5).
e.
If ( the waveform does not meet this specification,
adjust
4.4.7.
have been replaced, see Section 5.5.1.
Figure 5-5
5.5
OTHER ADJUSTMENTS
The checks and adjustments in this section do not require
the use of the alignment flexible disk.
5.5.1
LED Assembly/Index Assembly Check and Adjustment
If the index sensor and LED assembly are replaced, perform
the following check in addition to the index alignment ad
justment .
a.
When
using
the waveform at TP10, checking for a pulse width of
1 to 3 ms (see Figure 5-6).
It should be 200 ys + 200 ns.
the
index
sensor
If the LED assembly and the index assembly
Index Alignment Waveform
a single-sided
5-8
as described
in Section
flexible
disk,
measure
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