Sony RMT-V231B, Service Manual, Page: 54 / 76

5-2
5-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE
(MA-327 board IC160)
5-4. SYSTEM CONTROL AND RF MODULATOR — INPUT SELECTION BLOCK
INTERFACE (MA-327 board IC160)
5-5. SYSTEM CONTROL — VIDEO/RP BLOCK INTERFACE (MA-327 board IC160)
5-6. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-327 board IC160)
*1. Synchronized with drum rocation. 30Hz 50% duty pulse.
*2. Normal “L”. “H” when video signal is not rgenerated.
*3. Composite sync signal (positive).
Signal
ANT SEL
Pin No.
MA-327 Board
IC160
@¡
I/O
O
I/O level
“L” when RF modulator through.
Signal
RF SWP
QVD
REC P
C SYNC
Pin No.
MA-327 Board
IC160
!•
MA-327 Board
IC160
!£
MA-327 Board
IC160
$ª
MA-327 Board
IC160
*¢
I/O
O
O
O
I
PB
*1
*2
L
*3
REC
*1
L
L
*3
REC
PAUSE
*1
L
H
*3
TAPE
UNLOADING
*1
L
L
*3
TAPE
LOADING
*1
L
L
*3
STOP/FF
/REW
*1
L
L
*3
Signal
RESET
I2C DATA1
I2C CLOCK1
I2C DATA VIDEO
I2C CLOCK VIDEO
(RP) S OUT1
(RP) S CLK1
Pin No.
MA-327 Board
IC160
$£
MA-327 Board
IC160
@™
MA-327 Board
IC160
!¶
MA-327 Board
IC160
%™
MA-327 Board
IC160
%¡
MA-327 Board
IC160
^∞
MA-327 Board
IC160
^¶
I/O
I
I/O
O
I/O
O
I/O
O
I/O level
Normally “H”. “L” when service interruption detected or restored.
Serial communication data to audio microprocessor and
EEPROM I2C161.
Serial communication clock to audio microprocessor and
EEPROM I2C161.
Serial communication data to video microprocessor.
Serial communication clock to video microprocessor.
Serial communication data to RP microprocessor.
Serial communication clock to RP microprocessor.
Signal
A MUTE
Pin No.
MA-327 Board
IC160
$•
I/O
O
PB
L
REC
L
REC
PAUSE
H
TAPE
UNLOADING
L
TAPE
LOADING
L
STOP/FF
/REW
L