Interface, Ic Pin Function Description; System Control - Mechanism Block Interface (Ma-341 Board Ic160); System Control - Servo Peripheral Circuit Interface (Ma-341 Board Ic160) - Sony slv-779hf Service Manual

QQ
3 7 63 1515 0
5-1. SYSTEM CONTROL — MECHANISM BLOCK INTERFACE
(MA-341 BOARD IC160)
Signal Pin No.
MA-341 Board
CAM
IC160#£
MA-341 Board
MODE 1
IC160@ª
MA-341 Board
MODE 2
IC160@•
MA-341 Board
MODE 3
IC160@¶
MA-341 Board
MODE 4
IC160@§
MA-341 Board
REC PRF
IC160#º
MA-341 Board
T REEL
IC160*º
MA-341 Board
S REEL
IC160&ª
MA-341 Board
END LED
IC160@º
MA-341 Board
T SENS
IC1607
MA-341 Board
S SENS
IC1606
*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" pluse when tape top or end is detected.
TE
*4 Normally "L". 2 msec period "H" puise when tape top or end is detected.
L 13942296513
*5 Hi-Z
5-2. SYSTEM CONTROL — SERVO PERIPHERAL CIRCUIT INTERFACE
(MA-341 BOARD IC160)
Signal Pin No.
MA-341 Board
CTL IN+
IC160(∞
MA-341 Board
DRUM PG
IC160(º
MA-341 Board
DRUM FG
IC160*ª
MA-341 Board
CAP FG
IC160*¶
MA-341 Board
CAP RVS
IC160@¢
MA-341 Board
CAP ERR
IC160&§
MA-341 Board
DRUM ERR
IC160&¶
*1. 30Hz pulse.
*2. Pulse of period in propotion to tape speed.
*3. 30Hz "H" pluse.
*4. 720 Hz pulse.
*5. Unstable period pulse.
www
*6. DC voltage 1 – 5V.
*7. Hi-Z (2.5V)
.
http://www.xiaoyu163.com

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
STOP FF REW
I/O
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
x ao u163
y
i
http://www.xiaoyu163.com
SECTION 5
2 9
8
CASSETTE TAPE TAPE
UNLOARDING THREADING UNTEREADING
L H L
— — —
— — —
— — —
— — —
*1 *1 *1
H/L H/L H/L
H/L *2 *2
*3 *3 *3
*3 *4 *4
*3 *4 *4
Q Q
3 6 7 1 3 1 5
TAPE TAPE
PB
THREADING UNTEREADING
*7 *7 *7
*3
*3 *3
*4 *4 *4
*5
*5 *2
L H L
*6 *6 *6
*6 *6 *6
co
.
5-1
SLV-772HF/779HF
9 4 2 8
STOP FF REW PB
*5 *5 *5 *5
H H H H
L L L H
H H H L
H L L L
*1 *1 *1 *1
H/L *2 *2 *2
H/L *2 *2 *2
*3 *3 *3 *3
*4 *4 *4 *4
*4 *4 *4 *4
0 5 8 2 9 9 4 2 8
REC
*1
*3
*4
*2
L
*6
*6
m
9 9
REC
*5
H
H
L
L
*1
*2
*2
*3
*4
*4
9 9