Sony KV-14FV1B, Service Manual

Page: 48 / 84

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4-2.
SYSTEM CONTR
OL-VIDEO BLOCK INTERF
A
CE (MA10 BO
ARD IC402)
TAPE
TAPE
PB ·
PICTURE
SEARCH
REC
·
Signal
Pin No.
I/O
STOP
FF
REW
THREADING
UNTHREADING
PB
PAUSE
SLOW
X2
CUE
REVIEW
REC
PAUSE
REC CTL
IC402
7
O
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
*1
HI-Z
O
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
CAP STOP
IC402
#¢
(O.D)
L
(O.D)
(O.D)
(O.D)
(O.D)
(O.D)
L*
3
(O.D)
(O.D)
(O.D)
(O.D)
(O.D)
STEP PLS
IC402
(ª
O
LLLL
LLL
*2
LLLL
L
PB CTL
IC402
^¶
I
H
*6
*6
*1
H/L
*2
*6
*6
*6
*1
H
DRUM PG
IC402
^•
I
*4*
1*
1*
5*
5*
1*
1
*1
*1*
1*
1*
1*
1
DRUM FG
IC402
^ª
I
*4*
7*
7*
5*
5*
7*
7
*7
*7*
7*
7*
7*
7
CAP FG
IC402
&º
I
H/L
*6
*6
*5
*5
*6
H/L
*2
*6
*6
*6
*6
H/L
CAP DA
IC402
&£
O
*8*
8*
8*
8*
8*
9*
8
*8
*9*
9*
9*
9*
8
DRUM DA
IC402
&¢
O
*10
*10
*10
*10
*10
*10
*10
*10
*10
*10
*10
*10
*10
CTL RESET
IC402
0
I/O
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
*11
HI-Z
HI-Z
HI-Z
HI-Z
HI-Z
RF SW P (SW30)
IC402
1
O
*1
*1
*1*
1*
1
*1*
1*
1*
1
*1*
1*
1
*1
Q VD
IC402
4
O
L
L
L
L
L
*2
*3
*3
*3
*3
*3
L
L
V SYNC
IC402
^§
I
*4
*4
*4*
5*
5
*5*
5*
5*
5
*5*
5*
5
*5
TAPE
TAPE
PB ·
PICTURE
SEARCH
REC
·
Signal
Pin No.
I/O
STOP
FF
REW
THREADING
UNTHREADING
PB
PAUSE
SLOW
X2
CUE
REVIEW
REC
PAUSE
*1.
30Hz 50% duty pulse synchronizing with drum rotation.
*2.
Normally “L” . “H” when the video signal is not detected.
*3.
V period “H” pulse.
*4.
“H” in the LP mode. Selected according to the recording mode.
*5.
Selected according to the tape recording mode.
4-3.
SYSTEM CONTR
OL-SER
V
O
PERIPHERAL CIRCUIT INTERF
A
CE (MA10 BO
ARD IC402)
*1.
30Hz 50% pulse.
*2.
Pulse in tape running.
*3.
Reverse logic pulse of STEP
PLS.
*4.
“L” when drum rotation stops.
*5.
Unstable period pulse.
*6.
Pulse of Period proportionate to tape speed.
*7.
360Hz pulse.
*8.
Pulse in tape running.
*9.
Approx. 2 msec. period “H” or “L” pulse.
*10.
Approx. 1.5 msec. period “H” or “L” pulse.