6-1
6-1. SYSTEM CONTROL — SERVO PERIPHERAL CIRCUIT INTERFACE (MA-286 BOARD IC160)
*1. 25Hz pulse.
*2. Pulse at tape running.
*3. Reverse logic pulse of STEP PLS.
*4. “L” when drum rotation stop.
*5. Unstable period pulse.
*6. Pulse of period in proportion to tape speed.
*7. 300Hz pulse.
*8. Approx. 2 msec period “H” or “L” pulse.
*9. Approx. 1.5 msec period “H” or “L” pulse.
*10. Approx. 3 msec period “H” or “L” pulse.
*11. “H” when FWD directions STEP drive.
Signal
REC CTL
CAP STOP
STEP PLS
CTL REC
CTL INDEX
PB CTL
DRM PG
DRM FG
CAP FG
CAP DA
DRM DA
CTL STEP
CTL GAIN
CTL RESET
REC COUNT
Pin No.
MA-286 IC160
7
MA-286 IC160
#∞
MA-286 IC160
(ª
MA-286 IC160
&∞
MA-286 IC160
#•
MA-286 IC160
^¶
MA-286 IC160
^•
MA-286 IC160
^ª
MA-286 IC160
&º
MA-286 IC160
&£
MA-286 IC160
&¢
MA-286 IC160
&§
MA-286 IC160
(™
MA-286 IC160
8
MA-286 IC160
&¶
I/O
O
O (O.D)
O
O
O
I
I
I
I
O
O
O
O
I/O
I
STOP
*1
L
L
L
L
H
*1
*1
H/L
*8
*10
L
H
Hi-Z
Hi-Z
FF
*1
Hi-Z (O.D)
L
L
L
*8
*1
*7
*6
*8
*10
L
H
Hi-Z
Hi-Z
REW
*1
Hi-Z (O.D)
L
L
L
*8
*1
*7
*6
*8
*10
L
H
Hi-Z
Hi-Z
TAPE
THREADING
*1
Hi-Z (O.D)
L
L
L
*5
*5
*5
*8
*10
L
H
Hi-Z
Hi-Z
TAPE
UNTHREADING
*1
Hi-Z (O.D)
L
L
L
*5
*5
*5
*8
*10
L
H
Hi-Z
Hi-Z
PB
*1
Hi-Z (O.D)
L
L
L
*1
*1
*7
*8
*9
*10
L
H
Hi-Z
Hi-Z
PB PAUSE
*1
L
L
L
L
H/L
*1
*7
H/L
*8
*10
L
*12
Hi-Z
Hi-Z
SLOW
*1
*3
*2
L
L
*2
*1
*7
*2
*8
*10
*11
*12
Hi-Z
Hi-Z
CUE
*1
Hi-Z (O.D)
L
L
L
*5
*1
*7
*6
*9
*10
L
H
Hi-Z
Hi-Z
x 2
*1
Hi-Z (O.D)
L
L
L
*6
*1
*7
*6
*9
*10
L
H
Hi-Z
Hi-Z
REVIEW
*1
Hi-Z (O.D)
L
L
L
*6
*1
*7
*6
*9
*10
L
H
*13
Hi-Z
REC
*1
Hi-Z (O.D)
L
H
L
*1
*1
*7
*6
*9
*10
L
H
Hi-Z
Hi-Z
REC PAUSE
*1
Hi-Z (O.D)
L
L
L
H
*1
*7
H/L
*8
*10
L
L
Hi-Z
Hi-Z
PB INDEX
WRITING
H
H
L
Hi-Z
Hi-Z
SECTION 6
INTERF
A
CE,
IC PIN FUNCTION DESCRIPTION
SL
V
-E325EG/E475EG/E570EE/E570EG/E715B/E717VC/E720B/E720BZ/E720EE/
E720EG/E720EX/E720NC/E720NP/E720UX/E720VC/E720VP/E725NC
