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5.3
Check and Adjustments
5.3.1
Diskette rotational cycle adjustments
1)
Equipment
C E . Tester
Scratch
Universal Counter
VR Adjustment Driver
2)
Adjustment procedure
2)-1
2)-2
2)-3
2)-4
2)-5
2)-6
2) -7
3)
Test specifications
3) -1
3)-2
Diskette
Connect CE Tester to Drive then turn-on power
switch
Load diskette then turn-on motor with drive
select
Make sure Head Load Magnet activated.
Seek to Track 00
Connect universal counter to INDEX (TPB14)
signal and measure rotational cycle rate.
Adjust counter reading until it comes within
specifications using SPM VR (see figure 4)■
After this adjustment, lock VR with white
paint.
Check:
± 1.6% (196.8 - 203.2 ms.)
Adjust:
±1.0%
(198.6 - 201.4 ms.)
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