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5-2
5-3.
SYSTEM CONTROL – MECHANISM BLOCK INTERFACE (MA-308 BOARD IC401)
Pin No.
MA-308
IC401
^§
MA-308
IC401
@ª
MA-308
IC401
@•
MA-308
IC401
@¶
MA-308
IC401
@§
MA-308
IC401
#º
MA-308
IC401
*º
MA-308
IC401
&ª
MA-308
IC401
^¢
MA-308
IC401
7
MA-308
IC401
6
Signal
LOAD
MODE 1
MODE 2
MODE 3
MODE 4
REC PRF
T REEL
S REEL
END LED
T SENS
S SENS
I/O
O
I
I
I
I
I
I
I
O
I
I
EJECTED
∗
5
–
–
–
–
L
H/L
H/L
L
∗
3
∗
3
CASSETTE
LOADING
H
–
–
–
–
∗
1
H/L
H/L
∗
3
∗
3
∗
3
CASSETTE
UNLOADING
L
–
–
–
–
∗
1
H/L
H/L
∗
3
∗
3
∗
3
TAPE
THREAD-
ING
H
–
–
–
–
∗
1
H/L
∗
2
∗
3
∗
4
∗
4
TAPE
UNTHREAD
-ING
L
–
–
–
–
∗
1
H/L
∗
2
∗
3
∗
4
∗
4
REW
∗
5
H
H
L
H
∗
1
∗
2
∗
2
∗
3
∗
4
∗
4
STOP
∗
5
H
H
H
L
∗
1
H/L
H/L
∗
3
∗
4
∗
4
PB
∗
5
H
L
L
L
∗
1
∗
2
∗
2
∗
3
∗
4
∗
4
FF
∗
5
H
H
L
H
∗
1
∗
2
∗
2
∗
3
∗
4
∗
4
REC
∗
5
H
L
L
L
∗
1
∗
2
∗
2
∗
3
∗
4
∗
4
∗
1.
“H” when erasing protection tab is bent. “L” when not bent.
∗
2.
Pulse of period in proportion to reel rotating speed.
∗
3.
Approx. 2 msec period “H” pulse.
∗
4.
Normally “L” .2 msec period “H” pulse when tape top or tape end is detected.
∗
5.
Hi-Z
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