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4-2. SYSTEM CONTROL-VIDEO BLOCK INTERFACE (MA10 BOARD IC402)

TAPE TAPE PB · PICTURE SEARCH REC ·
Signal Pin No. I/O STOP FF REW
THREADING
UNTHREADING
PB PAUSE SLOW X2 CUE REVIEW REC PAUSE
REC CTL IC402 7O HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z *1 HI-Z
O HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z
CAP STOP IC402 (O.D) L(O.D) (O.D) (O.D) (O.D) (O.D) L*3
(O.D) (O.D) (O.D) (O.D) (O.D)
STEP PLS IC402 OLLLLLLL*2LLLLL
PB CTL IC402 I H *6 *6 *1 H/L *2 *6 *6 *6 *1 H
DRUM PG IC402 ^• I*4*1*1*5*5*1*1*1*1*1*1*1*1
DRUM FG IC402 I*4*7*7*5*5*7*7*7*7*7*7*7*7
CAP FG IC402 I H/L *6 *6 *5 *5 *6 H/L *2 *6 *6 *6 *6 H/L
CAP DA IC402 O*8*8*8*8*8*9*8*8*9*9*9*9*8
DRUM DA IC402 O *10 *10 *10 *10 *10 *10 *10 *10 *10 *10 *10 *10 *10
CTL RESET IC402 0I/O HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z *11 HI-Z HI-Z HI-Z HI-Z HI-Z
RF SW P (SW30) IC402 1O*1*1*1*1*1*1*1*1*1*1*1*1*1
Q VD IC402 4O L L L L L *2 *3 *3 *3 *3 *3 L L
V SYNC IC402 I*4*4*4*5*5*5*5*5*5*5*5*5*5
TAPE TAPE PB · PICTURE SEARCH REC ·
Signal Pin No. I/O STOP FF REW
THREADING
UNTHREADING
PB PAUSE SLOW X2 CUE REVIEW REC PAUSE
*1.30Hz 50% duty pulse synchronizing with drum rotation.
*2.Normally “L” . “H” when the video signal is not detected.
*3.V period “H” pulse.
*4.“H” in the LP mode. Selected according to the recording mode.
*5.Selected according to the tape recording mode.

4-3. SYSTEM CONTROL-SERVO PERIPHERAL CIRCUIT INTERFACE (MA10 BOARD IC402)

*1.30Hz 50% pulse.
*2.Pulse in tape running.
*3.Reverse logic pulse of STEP PLS.
*4.“L” when drum rotation stops.
*5.Unstable period pulse.
*6.Pulse of Period proportionate to tape speed.
*7.360Hz pulse.
*8.Pulse in tape running.
*9.Approx. 2 msec. period “H” or “L” pulse.
*10.Approx. 1.5 msec. period “H” or “L” pulse.