– 79 –
CASSETTE CASSETTE
TAPE
TAPE
PB ·
PICTURE SEARCH
REC ·
Signal
Pin No.
I/O EJECTED LOADING UNLOADING THREADING UNTHREADING
STOP
FF
REW
PB
PAUSE
SLOW
X2
CUE
REVIEW
REC
PAUSE
CAM UN LOAD IC402
9
O
HI-Z
H
L
H
L
*7
*7
*7
*7
*7
*7
*7
*7
*7
*7
*7
CAM LOAD
IC402
8
O
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
MODE 1
IC402
@™
I
H
L
L
*1
*1
H
H
H
H
H
H
H
H
L
H
H
MODE 2
IC402
@¡
I
H
L
L
*1
*1
H
H
H
L
L
L
L
L
L
L
L
MODE 3
IC402
@º
I
L
L
L
*1
*1
H
L
L
L
L
L
L
L
H
L
L
MODE 4
IC402
!ª
I
L
H
H
*1
*1
L
H
H
L
L
L
L
L
L
L
L
C IN REC PRF IC402
!¶
I
L
*2
*2
*2
*2
*2
*2
*2
*2
*2
*2
*2
*2
*2
*2
*2
T REEL FG
IC402
^¢
I
H/L
H/L
H/L
H/L
H/L
H/L
*3
*3
*3
H/L
*3
*3
*3
*3
*3
H/L
S REEL FG
IC402
^£
I
H/L
H/L
H/L
*3
*3
H/L
*3
*3
*3
H/L
*3
*3
*3
*3
*3
H/L
O
T/S LED
IC402
#∞
(O.D)
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
O
CAP STOP
IC402
#¢
(O.D)
L
L
L
H
H
L
H
H
H
L
*5
H
H
H
H
L
CAP RVS
IC402
&™
O
L
H
L
H/L
H
L
H
H
H/*5
H
H
L
H
H
T SENS
IC402
^¡
I
*4
*4
*4
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
S SENS
IC402
^™
I
*4
*4
*4
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
Signal
Pin No.
I/O
Function
ASURA RESET
IC402
$º
I
Normally "H"."L"when service interruption is detected or restored.
ASURA CS
IC402
$¢
I
Chip select signal from the timer microprocessor. V period “L” pulse.
S IN 0
IC402
$∞
I
Serial communication data from the timer microprocessor. V period “L” pulse.
S OUT 0
IC402
$§
O
Serial communication data to the timer microprocessor. V period “L” pulse.
S CLK
IC402
$¶
I
Serial communication clock with the timer microprocessor. V period “L” pulse.
A MUTE
IC402
$ª
O
L
L
L
L
L
*1
H
H
H
H
H
L
L
(O.D)
TAPE
TAPE
PB ·
PICTURE SEARCH
REC ·
Sigmal
Pin No.
I/O
STOP
FF
REW
LOADING
UNLOADING
PB
PAUSE
SLOW
X2
CUE
REVIEW
REC
PAUSE
4-4.
SYSTEM CONTROL-MECHANISM BLOCK INTERFACE (MA10 BOARD IC402)
*1. Uncer tainty.
*2. “L” when the erasing protection tab is bent, “H” when not bent.
*3. Pulse of period proportionate to reel rotation speed.
*4. Apporx. 2 msec. period “H” pulse.
*5. Pulse in tape running.
*6. Normally “L”. 2 msec. period “H” pulse when tape top or tape end is detected.
*7. “L” when unloading to switchover. “H” when loading. “HI-Z” when CAM motor is stop.
4-5.
SYSTEM CONTROL-SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA10 BOARD IC402)
4-6.
SYSTEM CONTROL-AUDIO BLOCK INTERFACE (MA10 BOARD IC402)
*1. 30Hz 50% duty pulse approximately 5 msec. delayed from RF SW P.
