Fujitsu M2301B Manual page 64

Microdisk drives
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STEPPING MOTOR
<!NTERFACE A
>
Control
I - -
Circuit
a:
LlJ
>
DISK SELECT
-
LlJ
COUNTER
U
Circuit
LlJ
<NTERFACE B
>
a:
---
a:
LlJ
~
>
-
a:
0
INX/SECT
DC SPINDLE
Generation
CRYSTAL
PLO
MOTOR
Circuit
OSC.
Control
I - - -
r;rr,,;t
t
t
-
I
-::-1
~
I
HEADS
LlJ
I
~
I
u
r - -
«
VFO &
R/W
R/W
LlJ
LlJ
u..
t:l
...J
a:
NRZ
MFM
I--
Circuit
PRE AMP
«
0
a:
r - -
LlJ
-
Z
0
I-
a:
I
~
a:
I-
Z
a:
U)
0
I - - -
-
«
u
u
~
I
0
~
I
I
CLO
CLOCK
-
-
l . . -
K HEAD
AMP
Fig. 4.8
Block Diagram

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