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Tk 00 Sensor Position Adjustment - Mitsubishi Electric M4853 Maintenance Manual

5.25 inch flexible disk drive
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Table of Contents
5.3.2
TKOO sensor position adjustment
1)
Equipment
Disk Tester
Scratch Diskette
No. 1 plus screw driver
Oscilloscope
2)
Adjustment procedure
2)-1
Connect CE Tester to Drive then turn-on power switch
and load diskette.
2)-2
Turn-on motor and select drive.
2)-3
Repeat seek between TKOO and 02 (see Figure 5).
2)-4
Observe waveform (TKOO) at TPB1 using oscilloscope.
trigger
signal
2)-5
Loosen screw and adjust TimeT until it comes to
within 3-4ms by moving TKOO in the direction of
the arrow (see Figure).
3)
Note:
3)-1
Set step rate at 3ms using Disk Tester
3)-2
Make sure there are 2 pulses on step signals.
CHI— step (DC, -)
CH2— TKOO (DC
TPD15
)
TPE1

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