SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
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5-1<br />
5-1. SYSTEM CONTROL – VIDEO/RP BLOCK INTERFACE (MA-315 BOARD IC161)<br />
Signal Pin No. I/O<br />
STOP/<br />
FF/<br />
REW<br />
RF SWP<br />
QVD<br />
REC P<br />
C SYNC<br />
Signal Pin No. I/O STOP FF REW<br />
CTL IN+<br />
DRM PG<br />
DRM FG<br />
CAP FG<br />
CAP RVS<br />
CAP ERR<br />
DRM ERR<br />
MA-315<br />
IC161!•<br />
MA-315<br />
IC161!£<br />
MA-315<br />
IC161$ª<br />
MA-315<br />
IC161*¢<br />
∗1. Synchronized with drum rotation. 25 Hz 50% duty pulse.<br />
∗2. Normally “L”. “H” when videl signal is not generated.<br />
∗3. Composite sync signal (positive).<br />
MA-315<br />
IC161(<br />
MA-315<br />
IC161*•<br />
MA-315<br />
IC161*<br />
MA-315<br />
IC161*∞<br />
MA-315<br />
IC161!§<br />
MA-315<br />
IC161&<br />
MA-315<br />
IC161&•<br />
TAPE TAPE REC •<br />
PB REC<br />
LOADING UNLOADING<br />
PAUSE<br />
O ∗1 ∗1 ∗1 ∗1 ∗1 ∗1<br />
O L L L ∗2 L L<br />
O L L L L L H<br />
I ∗3 ∗3 ∗3 ∗3 ∗3 ∗3<br />
5-2. SYSTEM CONTROL – SERVO PERIPHERAL CIRCUIT INTERFACE (MA-315 BOARD IC161)<br />
∗1. 25 Hz pulse.<br />
∗2. Pulse of period in proportion to tape speed.<br />
∗3. 25 Hz “H” pulse.<br />
∗4. 300 Hz pulse.<br />
TAPE TAPE<br />
LOADING UNLOADING<br />
PB REC<br />
O ∗7 ∗7 ∗7 ∗7 ∗7 ∗7 ∗1<br />
I ∗3 ∗3 ∗3 ∗3 ∗3 ∗3 ∗3<br />
I ∗4 ∗4 ∗4 ∗4 ∗4 ∗4 ∗4<br />
I H/L ∗2 ∗2 ∗5 ∗5 ∗2 ∗2<br />
O H/L L H L H L L<br />
O L ∗6 ∗6 ∗6 ∗6 ∗6 ∗6<br />
O ∗6 ∗6 ∗6 ∗6 ∗6 ∗6 ∗6<br />
∗5. Unstable period pulse.<br />
∗6. DC voltage 1~5V.<br />
∗7. Hi-Z (2.5V).<br />
SECTION 5<br />
INTERFACE, IC PIN FUNCTION DESCRIPTION<br />
SLV-E580/E630/E727/E730/E735/E780
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