Sharp FDD-412A Service Manual page 47

. FDD412A/B
(13) FILE DATA-N
T7 = 220 ns (TYP)
Fig. 2.54 FILE DATA-N Signal Timing
(14) INDEX-N
il ms + 0.6 ms
+—— 166.7 ms + 3.4% ———4
Index detecting
position
Inter-device difference in value < +] ms
Y
Head
position
Fig. 2.55 INDEX Signal Timing
—4i-