5-1
SECTION 5
INTERF
A
CE,
IC PIN FUNCTION DESCRIPTION
Signal
CAP QR
DRUM PG
Pin No.
MA-402
IC101
91
MA-402
IC101
104
MA-402
IC101
I/O
O
I
Hi-Z
*4
*4
*4
*7
*9
TAPE
THREADING
PB
Hi-Z
*4
*4
*4
*7
*9
TAPE
UNTHREAD-
ING
Hi-Z
*1
*6
*5
*8
*9
Hi-Z
*1
*6
H/L
*7
*9
PB •
PAUSE
*2
*1
*6
*5
*7
*9
SLOW
x 2
Hi-Z
*1
*6
*5
*8
*9
Hi-Z
*1
*6
*5
*8
*9
CUE
Hi-Z
*1
*6
*5
*8
*9
REVIEW
Hi-Z
*1
*6
*5
*8
*9
RECORD
Hi-Z
*1
*6
H/L
*7
*9
REC •
PAUSE
5-2.
SYSTEM CONTROL – SERVO PERIPHERAL CIRCUIT INTERFACE (MA-402 BOARD IC101)
*1. 25 Hz (PAL), 30 Hz (NTSC) pulse.
*2. Pulse at tape running.
*3. “L” when drum rotation stop.
*4. Unstable period pulse.
*5. Pulse of period in proportion to tape speed.
*6. 300 Hz (PAL), 360 Hz (NTSC) pulse.
*7. Pulse at tape running.
*8. Approx. 2 msec period “H” or “L” pulse.
*9. Approx. 1.5 msec period “H” or “L” pulse.
STOP
Hi-Z
*3
*3
H/L
*7
*9
FF
Hi-Z
*1
*6
*5
*7
*9
REW
Hi-Z
*1
*6
*5
*7
*9
Signal
RF SWP
QVD
C SYNC
Pin No.
MA-402
IC101
105
MA-402
IC101
109
MA-402
IC101
111
I/O
O
O
I
*1
L
*4
*1
L
*4
TAPE
THREADING
PB
STOP/
FF/REW
*1
L
*4
TAPE
UNTHREAD-
ING
*1
*2
*4
*1
*3
*4
PB •
PAUSE
*1
*3
*4
SLOW
x 2
*1
*3
*4
*1
*3
*4
CUE
*1
*3
*4
REVIEW
*1
*3
*4
RECORD
*1
*3
*4
REC •
PAUSE
5-1.
SYSTEM CONTROL – VIDEO BLOCK INTERFACE (MA-402 BOARD IC101)
*1 25 Hz pulse with 50% duty cycle. Synchronized with rotation of
drum.
*2 Normal PB “L”. V period “H” pulse when x1.
*3 V period “H” pulse.
*4 Composite sync signal (positive polarity).
SL
V
-EX50/EX80S/EX90S
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TEL 13942296513 QQ 376315150 892498299
