System Control - Video/Rp Block Interface (Ma-339 Board Ic162); System Control - Servo Peripheral Circuit Interface (Ma-339 Board Ic162) - Sony SLV-SE70 Service Manual

5-1. SYSTEM CONTROL — VIDEO/RP BLOCK INTERFACE (MA-339 BOARD IC162)
STOP/
Signal Pin No. I/O
FF/REW
MA-339
RF SWP O *1
IC162 !•
MA-339
QVD O L
IC162 !£
MA-339
C SYNC I *3
IC162 %§
*1 Synchronized with drum rotation. 25 Hz 50% duty pluse.
*2 Normally "L". "H" when video signal is not generated.
*3 Composite sync signal (positive).
5-2. SYSTEM CONTROL — SERVO PERIPHERAL CIRCUIT INTERFACE (MA-339 BOARD IC162)
Signal Pin No. I/O STOP
MA-339
CTL IN (+) O *7
IC162 (∞
MA-339
DRM PG I *3
IC162 (º
MA-339
DRM FG I *4
IC162 *ª
MA-339
CAP FG I H/L
IC162 *¶
MA-339
CAP RVS O H/L
IC162 @¢
MA-339
CAP ERR O L
IC162 &§
MA-339
DRM ERR O *6
IC162 &¶
*1. 25 Hz pulse.
*2. Pulse in period in proportion to tape speed.
*3. 25 Hz "H" pulse.
*4. 330 Hz pulse.
*5. Unstable period pulse.
*6. DC voltage 1 to 5V.
*7. Hi-Z (2.5 V)
TAPE TAPE
PB REC REC/PAUSE
LOADING UNLOADING
*1 *1 *1 *1
L L *2 L
*3 *3 *3 *3
TAPE TAPE
FF REW
LOADING UNLOADING
*7 *7 *7 *7
*3 *3 *3 *3
*4 *4 *4 *4
*2 *2 *5 *5
L H L H
*6 *6 *6 *6
*6 *6 *6 *6
*1
L
*3
PB REC
*7 *1
*3 *3
*4 *4
*2 *2
L L
*6 *6
*6 *6