Interface (Ma-342 Board Ic160); System Control - System Control Peripheral Circuit Interface; (Ma-342 Board Ic160); System Control And Rf Modulator - Sony SLV-789HF Service Manual

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5-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE

(MA-342 BOARD IC160)

Signal Pin No.
MA-342 Board
RESET
IC160#¢
MA-342 Board
I2C DATA 1
IC160#™
MA-342 Board
I2C CLOCK 1
IC160#¡
MA-342 Board
I2C DATA VIDEO
IC160&™
MA-342 Board
I2C CLOCK VIDEO
IC160&¡
MA-342 Board
(ARC) S OUT 1
IC160$™
MA-342 Board
(ARC) CLK 1
IC160$¡
5-4. SYSTEM CONTROL AND RF MODULATOR — INPUT SELECTION BLOCK

INTERFACE (MA-342 BOARD IC160)

Signal Pin No.
MA-342 Board
ANT SEL
IC160@¡
5-5. SYSTEM CONTROL — VIDEO/RP BLOCK INTERFACE (MA-342 BOARD IC160)
Signal Pin No.
TE
L 13942296513
MA-342 Board
RF SWP
IC160!•
MA-342 Board
QVD
IC160!£
MA-342 Board
C SYNC
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).
5-6. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-342 BOARD IC160)
Signal Pin No.
MA-342 Board
A MUTE
IC160^£
MA-342 Board
AF REC P
IC160@™
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I/O
I Normally "H", "L" when service interruption detected or restored.
I/O Serial communication data to EEPROM I2C161.
O Serial communication clock to EEPROM I2C161.
I/O Serial communication data to video and audio microprocessor.
O Serial communication clock to video and audio microprocessor.
I/O Serial communication data to ARC microprocessor.
O Serial communication clock to ARC microprocessor.
I/O
O "L" when RF modulator through.
STOP/FF TAPE
I/O
/REW LOADING
O *1 *1
O L L
I *3 *3
STOP/FF TAPE
I/O
/REW LOADING
O L L
O L L
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8
I/O level
I/O level
TAPE
PB REC
Q Q
UNLOADING PAUSE
3 6 7 1 3
*1 *1 *1
L *2 L
*3 *3 *3
TAPE
PB REC
UNLOADING PAUSE
L L L
L L L
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5-2
2 9 9 4 2 8
REC/
1 5 0 5 8 2 9 9 4
*1
L
*3
REC/
H
H
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9 9
2 8 9 9