System Control - Mechanism Block Interface (Ma-372 Board Ic162); System Control - System Control Peripheral Circuit Interface; System Control - Audio Block Interface; (Ma-372 Board Ic162) - Sony SLV-SE200 Service Manual

5-3. SYSTEM CONTROL — MECHANISM BLOCK INTERFACE (MA-372 BOARD IC162)
Signal Pin No. I/O
MA-372
CAM O
IC162 ed
MA-372
MODE 1 I
IC162 wl
MA-372
MODE 2 I
IC162 wk
MA-372
MODE 3 I
IC162 wj
MA-372
MODE 4 I
IC162 wh
MA-372
REC PRF I
IC162 e;
MA-372
T REEL I
IC162 i;
MA-372
S REEL I
IC162 ul
MA-372
END LED O
IC162 w;
MA-372
T SENS I
IC162 7
MA-372
S SENS I
IC162 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.
*4. Normally "L". 2 msec period "H" pulse when tape top or tape end is detected.
*5. Hi-Z
5-4. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE

(MA-372 BOARD IC162)

Signal Pin No. I/O
MA-372
RESET
IC162 ef
5-5. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-372 BOARD IC162)
Signal Pin No. I/O
MA-372
A MUTE O
IC162 yd
CASSETTE CASSETTE
EJECTED
LOADING UNLOADING
M H/M L/M
H — —
H — —
L — —
L — —
L *1 *1
H/L H/L H/L
H/L H/L H/L
L *3 *3
*3 *3 *3
*3 *3 *3
I/O level
I Normal "H" , "L" when seryvice Interruption is detected or restored.
STOP/ TAPE TAPE
FF/REW LOADING UNLOADING
L L L
TAPE TAPE
STOP
THREADING UNTHREADING
H/M L/M M
L L H
L L H
H H H
H H L
*1 *1 *1
H/L H/L H/L
*2 *2 H/L
*3 *3 *3
*4 *4 *4
*4 *4 *4
PB REC REC/PAUSE
L L H
5-2
FF REW PB REC
M M M M
H H H H
H H L L
L L L L
H H L L
*1 *1 *1 *1
*2 *2 *2 *2
*2 *2 *2 *2
*3 *3 *3 *3
*4 *4 *4 *4
*4 *4 *4 *4