5-1
SLV-SE850/SF900/SF950/SF990
SECTION 5
INTERFACE, IC PIN FUNCTION DESCRIPTION
5-1.
SYSTEM CONTR
OL —
VIDEO BLOCK INTERF
A
CE (MA-388 Boar
d IC160)
*1
Sync
hr
oniz
ed with dr
um r
otation. 25Hz 50% duty c
ycle.
*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
Selected b
y
T
ape recor
ding mode
.
*6
Composite Sync signal (positi
v
e).
Signal
RF SWP
QVD
V SYNC
Pin No.
1
4
is
I/O
O
O
I
ST
OP
FF/REW
*1
L
*4
T
APE
THREADING
*1
L
*6
T
APE
UNTHREADING
*1
L
*6
PB
*1
*2
*6
PB
z
P
A
USE
*1
*3
*6
SLO
W
*1
*3
*6
CUE
*1
*3
*6
x 2
*1
*2
*6
REVIEW
*1
*3
*6
REC
*1
L
*6
REC
z
P
A
USE
*1
L
*6
5-2.
SYSTEM CONTR
OL — SER
V
O
PERIPHERAL CIRCUIT INTERF
A
CE (MA-388 Boar
d IC160)
*1:
25 Hz (P
AL), 30 Hz (NTSC) pulse.
*2:
Pulse at tape running.
*3:
Re
v
er
se lo
gic pulse of STEP PLS.
*4:
“L” when drum rotation stops.
*5:
Unstable period pulse.
*6:
Pulse in period proportional to tape speed.
*7:
300 Hz (P
AL),
360 Hz (NTSC) pulse.
Signal
CAP ST
OP
STEP PLS
SER
V
O
DRM PG
DRM FG
CAP FG
CAP D
A
DRM D
A
F
AST SEARCH
18V CONT
24V CONT
Pin No.
eg
ol
wj
yk
yl
u;
ud
uf
oa
ig
if
I/O
O (O.D)
O
O
I
I
I
O
O
O
O
O
ST
OP
L
L
H/L
*4
*4
H/L
*8
*10
H
L
L
FF
HI-Z (O.D)
L
*6
*1
*7
*6
*8
*10
*12
*13
*14
REW
HI-Z (O.D)
L
*6
*1
*7
*6
*8
*10
*12
*13
*14
T
APE
THREADING
HI-Z (O.D)
L
*5
*5
*5
*8
*10
H
L
L
T
APE
UNTHREADING
HI-Z (O.D)
L
*5
*5
*5
*8
*10
H
L
L
PB
HI-Z (O.D)
L
*1
*1
*7
*6
*9
*10
H
L
L
PB
z
P
A
USE
L
L
H/L
*1
*7
H/L
*8
*10
H
L
L
SLO
W
*3
*2
*2
*1
*7
*2
*8
*10
H
L
L
x 2
HI-Z (O.D)
L
*6
*1
*7
*6
*8
*10
H
L
L
CUE
HI-Z (O.D)
L
*6
*1
*7
*6
*9
*10
H
L
L
REVIEW
HI-Z (O.D)
L
*6
*1
*7
*6
*9
*10
H
L
L
REC
HI-Z (O.D)
L
*1
*1
*7
*6
*9
*10
H
L
L
REC
z
P
A
USE
HI-Z (O.D)
L
H
*1
*7
H/L
*8
*10
H
L
L
*8:
Pulse at tape running.
*9:
Approx. 2 msec period
“H” or “L” pulse.
*10:
Approx. 1.5 msec period
“H” or “L” pulse.
*12:
“L
” w
hen sear
ch
“inde
x”
signal. Inde
x sear
ch,
Smart Sear
ch, Smartf
ile Gener
ator
.
*13:
“H” when use 18V for Capstan.
*14:
“H” when use 24V for Capstan.
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