System Control - Mechanism Interface; System Control - Audio Block Interface - Sony SLV-GA30 Service Manual

5-3. SYSTEM CONTROL — MECHANISM INTERFACE (MA-336 BOARD IC201)
Signal Pin No. I/O EJECTED
(∞
CAM2 HI-Z L
^™
MODE 1 (*8) I H
^£
MODE 2 (*8) I H
^¢
MODE 3 (*8) I L
^∞
MODE 4 (*8) I L
1
REC PRF I H
*•
T REEL FG I H/L
*ª
S REEL FG I H/L
&¢
END LED O (O.D) *4
%∞
CAP RVS O H
!™
T SENS I *4
!¡
S SENS I *4
*1. Uncertainly.
*2. "L" when erasing protection tab is bent. "H" when not bent.
*3. Pause of period in proportion to reel rotating speed.
*4. Approx. 2 msec period "H" pulse.
*5. Pulse at tape running.
*6. Normally "L". 2 msec period "H" pulse when tape top or tape end is detected.
5-4. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-336 BOARD IC201)
STOP/FF/
Signal Pin No. I/O
REW
!¢
AF ENV I AF RF envelope signal input terminal for automatic tracking.
@¡
A MUTE O (O.D) L
!¶
AF REC P O L
@£
AF SWP O *1
*1. 30 Hz 50 % duty pulse approx. 5 msec delayed from RF SW P.
CASSETTE CASSETTE TAPE TAPE
STOP
LOADING UNLOADING THREADING UNTHREADING
H L H L *7
L L *1 *1 H
L L *1 *1 H
L L *1 *1 H
H H *1 *1 L
*2 *2 *2 *2 *2
H/L H/L H/L H/L H/L
H/L H/L *3 *3 H/L
*4 *4 *4 *4 *4
L H H/L
*4 *4 *6 *6 *6
*4 *4 *6 *6 *6
*7. When transition to UNLOADING direction : "L".
When transition to LOADING direction : "H".
When CAM MOTOR is stopped : Hi-Z.
*8. When RVS slow : Mode 1="L"
When RVS slow : Mode 2="L"
When RVS slow : Mode 3="H"
When RVS slow : Mode 4="L"
TAPE TAPE
PB PB PAUSE
LOADING UNLOADING
L L *1 H
L L L L
*1 *1 *1 *1
FF REW PB PB PAUSE SLOW
*7 *7 *7 *7 *7
H H H H H
H H L L L
L L L L L
H H H L L
*2 *2 *2 *2 *2
*3 *3 *3 H/L *3
*3 *3 *3 H/L *3
*4 *4 *4 *4 *4
L H L L L/*5
*6 *6 *6 *6 *6
*6 *6 *6 *6 *6
SLOW x 2 CUE REVIEW
H H H H
L L L L
*1 *1 *1 *1
REC
x 2 CUE REVIEW REC
PAUSE
*7 *7 *7 *7 *7
H H L H H
L L L L L
L L H L L
L L L L L
*2 *2 *2 *2 *2
*3 *3 *3 *3 H/L
*3 *3 *3 *3 H/L
*4 *4 *4 *4 *4
L L H L L
*6 *6 *6 *6 *6
*6 *6 *6 *6 *6
REC REC PAUSE
L L
H L
*1 *1