Interface, Ic Pin Function Description; System Control - Mechanism Block Interface; (Ma-317 Board Ic160); System Control - Servo Peripheral Circuit Interface - Sony SLV-478 Service Manual

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5-1. SYSTEM CONTROL — MECHANISM BLOCK INTERFACE (MA-317 board IC160)
Signal Pin No.
MA-317 Board
CW
IC160 %•
MA-317 Board
MODE 1
IC160 @ª
MA-317 Board
MODE 2
IC160 @•
MA-317 Board
MODE 3
IC160 @¶
MA-317 Board
MODE 4
IC160 @§
MA-317 Board
REC PRF
IC160 #º
MA-317 Board
T REEL
IC160 *º
MA-317 Board
S REEL
IC160 &ª
MA-317 Board
END LED
IC160 @º
MA-317 Board
T SENS
IC160 7
MA-317 Board
S SENS
IC160 6
*1. "L" When erasing protection tab is bent. "H" when not bent.
*2. Pulse of period in proportion to reel rotating speed.
*3. Approx. 2 msec period "H" pulse when tape top or end is detected.
*4. Normally "L". 2 msec period "H" pulse when tape top or end is detected.
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L 13942296513
*5. Hi-Z
5-2. SYSTEM CONTROL — SERVO PERIPHERAL CIRCUIT INTERFACE

(MA-317 board IC160)

Signal Pin No.
MA-317 Board
CTL IN+
IC160 (™
MA-317 Board
DRUM PG
IC160 *§
MA-317 Board
DRUM FG
IC160 *¶
MA-317 Board
CAP FG
IC160 *∞
MA-317 Board
CAP RVS
IC160 !§
MA-317 Board
CAP ERR
IC160 &¶
MA-317 Board
DRUM ERR
IC160 &•
*1. 30 Hz pulse
*2. Pulse of period in propotion to tape speed.
*3. 30 Hz "H" pulse.
*4. 720 Hz pulse.
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*5. Unstable period pulse.
*6. DC voltage 1 ~ 5V.
*7. Hi-Z (2.5V).
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INTERFACE, IC PIN FUNCTION DESCRIPTION

CASSETTE
I/O EJECTED
LOARDING
O *5 H
I — —
I — —
I — —
I — —
I L *1
I H/L H/L
I H/L H/L
O L *3
I *3 *3
I *3 *3
I/O STOP FF REW
O *7 *7 *7
I *3 *3 *3
I *4 *4 *4
I H/L *2 *2
O H/L L H
O L *6 *6
O *6 *6 *6
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SLV-478/677HF/678HF/688HF/L47/L48/L57/
L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF
SECTION 5
2 9
8
CASSETTE TAPE
UNLOARDING THREADING UNTEREADING
L H
— —
— —
— —
— —
*1 *1
H/L H/L
H/L *2
*3 *3
*3 *4
*3 *4
Q Q
3 6 7 1 3
TAPE TAPE
THREADING UNTHREADING
*7 *7
*3 *3
*4 *4
*5 *5
L H
*6 *6
*6 *6
.
5-1
9 4 2 8
TAPE
STOP FF REW
L *5 *5 *5
— H H H
— L L L
— H H H
— H L L
*1 *1 *1 *1
H/L H/L *2 *2
*2 H/L *2 *2
*3 *3 *3 *3
*4 *4 *4 *4
*4 *4 *4 *4
1 5 0 5 8 2 9 9 4
PB REC
*7 *1
*3 *3
*4 *4
*2 *2
L L
*6 *6
*6 *6
m
co
9 9
PB REC
*5 *5
H H
H H
L L
L L
*1 *1
*2 *2
*2 *2
*3 *3
*4 *4
*4 *4
2 8 9 9