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5-3.
SYSTEM CONTROL – MECHANISM BLOCK INTERFACE (MA-402 BOARD IC101)
Signal
Pin No.
I/O
EJECTED
MA-402
CAM
O
Hi-Z
IC101
45
MA-402
MODE 1
I
H
IC101
37
MA-402
MODE 2
I
H
IC101
38
MA-402
MODE 3
I
IC101
39
MA-402
MODE 4
I
IC101
40
MA-402
REC PRF
I
H
IC101
86
MA-402
T REEL
I
H/L
IC101
42
MA-402
S RELL
I
H/L
IC101
41
MA-402
O
END-LED
*4
IC101
(O.D)
49
MA-402
CAP PVS
I
IC101
90
MA-402
T SENS
I
*4
IC101
33
MA-402
S SENS
I
*4
IC101
32
*1. Uncertainty.
*2. "L" when erasing protection tab is bent, "H" when not bent.
*3. Pulse of period in proportion to reel rotating speed.
*4. Approx.2 msec period "H" pulse.
*5. Pulse at tape running.
TAPE
CASSETTE
CASSETTE
THREAD-
UNTHREAD-
LOADING
UNLOADING
ING
H
L
H
L
L
*1
L
L
*1
L
L
L
*1
L
H
H
*1
*2
*2
*2
H/L
H/L
H/L
H/L
H/L
*3
*4
*4
*4
L
H
*4
*4
*6
*4
*4
*6
*6. Normally "L". 2 msec period "H" pulse when tape top or tape end is detected.
*7. When transition to UNLOADING direction: L.
When Transition to LOADING direction: H.
When CAM motor is stopped: Hi-Z.
TAPE
PB
STOP
FF
REW
PB
PAUSE
ING
L
H
*7
*7
*7
*7
*1
L
H
H
H
*1
L
H
H
H
*1
L
L
L
L
*1
H
H
H
H
*2
*2
*2
*2
*2
*2
H/L
H/L
*3
*3
*3
H/L
*3
H/L
*3
*3
*3
H/L
*4
*4
*4
*4
*4
*4
L
H/L
H
L
H
*6
*4
*6
*6
*6
*6
*6
*4
*6
*6
*6
*6
SLOW
x 2
CUE
REVIEW
REC
*7
*7
*7
*7
*7
H
H
H
H
L
H
H
H
L
L
L
L
L
L
L
L
H
L
H
H
L
L
L
L
*2
*2
*2
*2
*2
*3
*3
*3
*3
*3
*3
*3
*3
*3
*3
*4
*4
*4
*4
*4
H
H
H
H
L
H
*6
*6
*6
*6
*6
*6
*6
*6
*6
*6
REC •
PAUSE
*7
H
L
L
L
*2
H/L
H/L
*4
H
*6
*6
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