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In addition to the usual care that should be taken with a
flexible disk, take the following extra precautions with the
alignment flexible disk.
•
Before
disk for one hour in the working environment.
•
Keep the disk drive in the "power-on" status for one
hour.
•
Do not allow the flexible disk to remain immobile
under a head load condition for long.
•
Use the flexible disk in a temperature range of 68
to 78.5°F (20° to 26°C) .
5.4.1
Head Radial Alignment Check or Adjustment
Set the oscilloscope to the settings shown in Table 5-3,
then perform the head radial alignment as follows.
Table 5-3
ITEM
Channel 1
Channel 2
Mode
Inputs
Input range
Test points
Trigger
Time base
Probes
a.
Insert
carriage
track 38.
b.
Load the read/write heads for three minutes.
making
adjustments,
Head Radial Alignment Oscilloscope Settings
Normal
Inverted
Add
Ac
100 mV/division
TP8 and TP9
TP7 (dual-sided media)
TP10 (single-sided media)
20 ms/division
xl or xlO
the
alignment
(with the drive tester)
acclimate
SETTING
flexible
disk
5-4
the
flexible
and
step
the
from track 00 to
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