System Control-Video/Rp Block Interface (Ma-315 Board Ic161); System Control-Servo Peripheral Circuit Interface (Ma-315 Board Ic161) - Sony SLV-E580EE Service Manual

5-1. SYSTEM CONTROL – VIDEO/RP BLOCK INTERFACE (MA-315 BOARD IC161)
Signal Pin No. I/O
MA-315
RF SWP O
IC161!•
MA-315
QVD O
IC161!£
MA-315
REC P O
IC161$ª
MA-315
C SYNC I
IC161*¢
1. Synchronized with drum rotation. 25 Hz 50% duty pulse.
2. Normally "L". "H" when videl signal is not generated.
3. Composite sync signal (positive).
5-2. SYSTEM CONTROL – SERVO PERIPHERAL CIRCUIT INTERFACE (MA-315 BOARD IC161)
Signal Pin No. I/O
MA-315
CTL IN+ O
IC161(™
MA-315
DRM PG I
IC161*•
MA-315
DRM FG I
IC161*¶
MA-315
CAP FG I
IC161*∞
MA-315
CAP RVS O
IC161!§
MA-315
CAP ERR O
IC161&¶
MA-315
DRM ERR O
IC161&•
1. 25 Hz pulse.
2. Pulse of period in proportion to tape speed.
3. 25 Hz "H" pulse.
4. 300 Hz pulse.
STOP/
TAPE TAPE
FF/ PB
LOADING UNLOADING
REW
1 1 1 1
L L L 2
L L L L
3 3 3 3
TAPE
STOP FF REW
LOADING UNLOADING
7 7 7 7
3 3 3 3
4 4 4 4
H/L 2 2 5
H/L L H L
L 6 6 6
6 6 6 6
5. Unstable period pulse.
6. DC voltage 1~5V.
7. Hi-Z (2.5V).
REC •
REC
PAUSE
1 1
L L
L H
3 3
TAPE
PB REC
7 7 1
3 3 3
4 4 4
5 2 2
H L L
6 6 6
6 6 6