System Control-Mechanism Block Interface (Ma-402 Board Ic101) - Sony SLV-EX50 Service Manual

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5-3. SYSTEM CONTROL – MECHANISM BLOCK INTERFACE (MA-402 BOARD IC101)
I/O
Signal Pin No.
MA-402
CAM O
IC101
45
MA-402
MODE 1 I
IC101
37
MA-402
MODE 2 I
IC101
38
MA-402
MODE 3 I
IC101
39
MA-402
MODE 4 I
IC101 40
MA-402
REC PRF I
IC101
86
T E
L 1 3 9 4 2 2 9 6 5 1 3
MA-402
T REEL I
IC101
42
MA-402
S RELL I
IC101 41
MA-402 O
END-LED
IC101 (O.D)
49
MA-402
CAP PVS I
IC101
90
MA-402
T SENS I
IC101
33
MA-402
S SENS I
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.
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TAPE
CASSETTE CASSETTE
EJECTED THREAD-
LOADING UNLOADING
ING
Hi-Z H L H
H L L *1
H L L *1
L L L *1
L H H *1
H *2 *2 *2
H/L H/L H/L H/L
H/L H/L H/L *3
*4 *4 *4 *4
L H
*4 *4 *4 *6
*4 *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.
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TAPE
UNTHREAD- STOP F F REW PB
ING
L H *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
Q Q
3 7 6 3 1
H/L H/L *3 *3 *3
*3 H/L *3 *3 *3
*4 *4 *4 *4 *4
L H/L H L H
*6 *4 *6 *6 *6
*6 *4 *6 *6 *6
u 1 6 3
.
2 4
9 9 8
PB
SLOW x 2 CUE REVIEW REC
PAUSE
*7 *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 *2
5 1 5 0 8 9 2 4
H/L *3 *3 *3 *3 *3
H/L *3 *3 *3 *3 *3
*4 *4 *4 *4 *4 *4
H H H H L H
*6 *6 *6 *6 *6 *6
*6 *6 *6 *6 *6 *6
m
c o
2
9 9
REC •
PAUSE
*7
H
L
L
L
*2
9 8 2 9 9
H/L
H/L
*4
H
*6
*6