Sony SLV-ED1PL, Service Manual

Page: 50 / 135

5-1
SECTION 5
INTERF
A
CE,
IC PIN FUNCTION DESCRIPTION
SL
V
-ED1/ED4/ED7/ED8
TAPE TAPE
PB • REC •
Signal Pin No. I/O STOP FF REW THREAD- UNTHREAD- PB
PAUSE
SLOW
×
2 CUE REVIEW REC
PAUSE
ING ING
CAP QR
MA-323
O Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z * 2 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z
IC161
(¢
DRM PG
MA-323
I
*
3
*
1
*
1
*
4
*
4
*
1
*
1
*
1
*
1
*
1
*
1
*
1
*
1
IC161
#ª
DRM FG
MA-323
I * 3 * 6 * 6 * 4 * 4 * 6 * 6 * 6 * 6 * 6 * 6 * 6 * 6
IC161
#•
CAP FG
MA-323
I H/L
*
5
*
5
*
4
*
4
*
5 H/L
*
5
*
5
*
5
*
5
*
5 H/L
IC161
$º
CAP VS
MA-323
O * 7 * 7 * 7 * 7 * 7 * 8 * 7 * 7 * 8 * 8 * 8 * 8 * 7
IC161
@∞
DRM VS
MA-323
O * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9
IC161
@§
5-2. SYSTEM CONTROL – SERVO PERIPHERAL CIRCUIT INTERFACE (MA-323 BOARD IC161)
∗
1. 30 Hz pulse.
∗
2. Pulse at tape running.
∗
3. “L” when drum rotation stop.
∗
4. Unstable period pulse.
∗
5. Pulse of period in proportion to tape speed.
∗
6. 360 Hz pulse.
∗
7. Pulse at tape running.
∗
8. Approx. 2 msec period “H” or “L” pulse.
∗
9. Approx. 1.5 msec period “H” or “L” pulse.
STOP/ TAPE TAPE
REC • REC •
Signal Pin No. I/O FF/ THREAD- UNTHREAD- PB
PAUSE
SLOW
×
2 CUE REVIEW REC
PAUSE
REW ING ING
RF SWP MA-323
O * 1 * 1 * 1 * 1 * 1 * 1 * 1 * 1 * 1 * 1 * 1
(SW30) IC161
@¢
QVD
MA-323
O L L L
*
2
*
3
*
3
*
3
*
3
*
3 L L
IC161
@¶
C SYNC
MA-323
I * 4 * 4 * 4 * 4 * 4 * 4 * 4 * 4 * 4 * 4 * 4
IC161
%¢
5-1. SYSTEM CONTROL – VIDEO BLOCK INTERFACE (MA-323 BOARD IC161)
∗
1. 30 Hz pulse with 50% duty cycle. Synchronized with rotation of drum.
∗
2. Normal PB “L”. V period “H” pulse when
×
1.
∗
3. V period “H” pulse.
∗
4. Composite Sync signal (positive polarity).