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9.5
Resolution Verification
(1) Leave the oscilloscope in the same condition as mentioned in section 9.3.
(2) Resolution is calculated by the following formula .
• V2Faverage
V
1
Faverage
x lOO
(%)
(3) Check that the calculated value meets the specifications of Table 8.1.
9.6
Radial Alignment Adjustment
Introduction
This adjustment is normally not necessary.
If the mounting screws for the stepper motor loosen, or if parts become defective, or if a compatibility
error occurs, check and readjust according to the following procedure.
Steps (4) to (9) below should be performed regardless of the type, CE or DAD alignment diskette used. Use
an alignment diskette suitable to the type of FDD to be adjusted according to table 3.1.
(1) Insert Panasonic alignment diskette.
CAUTION:
Be sure to leave the alignment diskette under room conditions for
20
minutes before adjustment.
(2)
Step to the track specified in the Radial alignment column of Table 8.1.
(3) Leave the oscilloscope in the same condition as mentioned in section 9.3.
•
Cats Eye System
(4) Check the output waveforms for sides 0 and 1. They should appear as in Fig. 9.2.
(5) The two waveforms should appear in the amplitude ratio in the RIA ± 55% or more.
(6) If the specified ratio is not satisfied, loosen the two mounting screws for the stepper motor.
(7) Move the stepper motor along the base by hand until the two waveforms assume approximately the
same amplitude, and retighten the mounting screws. (See Fig. 9.2.)
(8) Step the head outward (track O) and inward (track 40 or 79), and confirm that the adjustment has been
completed.
(9) After the radial adjustment, be sure to confirm track 00 sensor adjustment 9.9
A>B
~
x 100
B>A
~
x 100
Fig. 9.2 Radial Alignment Waveforms (CATS EYE)
Note:
Alignments on sides O and 1 are adjusted at the factory. If they are misaligned, adjust them to
meet the specifications of Table 8.1.
-B-
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