Sony RMT-V259D, Service Manual

Page: 80 / 118

5-1
SL
V
-SE85/SF90/SF99
SECTION 5
INTERF
A
CE,
IC PIN FUNCTION DESCRIPTION
5-1. SYSTEM CONTROL — VIDEO BLOCK INTERFACE (MA-359 BOARD IC160)
*1 Synchronized with drum rotation. 30Hz 50% duty cycle.
*2 Normally “L“. “H“ when CTL signal is not generated.
*3 V period “H“ pulse.
*4 Selected by REC mode. “H“ in LP mode.“
*5 Composite sync signal (positive).
Signal
RF SWP
QVD
V SYNC
HA SWP
Pin No.
1
4
*™
(™
I/O
O
O
I
O
STOP
FF/REW
*1
L
*4
*1
TAPE
THREADING
*1
L
*5
*1
TAPE
UNTHREADING
*1
L
*5
*1
PB
*1
*2
*5
*1
PB PAUSE
*1
*3
*5
*1
SLOW
*1
*3
*5
*1
CUE
*1
*3
*5
*1
x 2
*1
*2
*5
*1
REVIEW
*1
*3
*5
*1
REC
*1
L
*5
*1
REC PAUSE
*1
L
*5
*1
5-2. SYSTEM CONTROL — SERVO PERIPHERAL CIRCUIT INTERFACE (MA-359 BOARD IC160)
*1. 30Hz pulse (NTSC), 25Hz pulse (PAL).
*2. Pulse at tape running.
*3. Reverse logic pulse of STEP PLS.
*4. “L” when drum rotation stops.
*5. Unstable period pulse.
*6. Pulse in period in proportional to tape speed.
*7. 360Hz pulse (NTSC), 300Hz pulse (PAL).
*8. Pulse at tape running.
*9. Approx. 2 msec period “H” or “L” pulse.
*10. Approx. 1.5 msec period “H” or “L” pulse.
Signal
CAP STOP
STEP PLS
DRM PG
DRM FG
CAP FG
CAP DA
DRM DA
Pin No.
#£
(ª
$∞
$§
$¶
&•
&ª
I/O
O (O.D)
O
I
I
I
O
O
STOP
L
L
*4
*4
H/L
*8
*10
FF
Hi-Z (O.D)
L
*1
*7
*6
*8
*10
REW
Hi-Z (O.D)
L
*1
*7
*6
*8
*10
TAPE
THREADING
Hi-Z (O.D)
L
*5
*5
*5
*8
*10
TAPE
UNTHREADING
Hi-Z (O.D)
L
*5
*5
*5
*8
*10
PB
Hi-Z (O.D)
L
*1
*7
*6
*9
*10
PB PAUSE
L
L
*1
*7
H/L
*8
*10
SLOW
*3
*2
*1
*7
*2
*8
*10
CUE
Hi-Z (O.D)
L
*1
*7
*6
*9
*10
x 2
Hi-Z (O.D)
L
*1
*7
*6
*8
*10
REVIEW
Hi-Z (O.D)
L
*1
*7
*6
*9
*10
REC
Hi-Z (O.D)
L
*1
*7
*6
*9
*10
REC PAUSE
Hi-Z (O.D)
L
*1
*7
H/L
*8
*10