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2
FI(;URE 5-12
HEAD AZIMUTH ALIGNMENT UF ACCEPTABLE UPPER J.IMITS
5.9
TRACK 0 SENSUR CHECK AND ADJUSTMENT
The
Track 0 sensor circuitry
~rovides
a signal identifying Track 0 to
the
logic electronics.
The electronics disable the
ste~-out
function
when Track 0 is reached.
In addition, a Track 0 signal is sent to the
controller on Pin 26 of the interface.
Track
0
Sensor Check
1.
Set
u~
the oscilloscope
C~lanne
1
A:
Test Point 4
Channel B:
Test Point
5
Ground:
Test Point
8
or 14
Read Differentially:
A plus B, B inverted
Time Base:
20 milliseconds per division
External Trigger:
Vertical Display:
Test Point 12, positive edge
0.1 volt per division
2.
Ap~ly
power to the drive.
3.
Insert a certified alignment diskette into the drive.
4.
Close the front latch.
5.
Step the carriage to the radial alignment track.
5-15
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