SLV-KA177PK, SLV-KA177PL, SLV-KA200PL, SLV-KF300PL, SLV-XA127PK, SLV-XA127PL, SLV-XF247PL - Sony VCR Service Manual (repair manual). Page 18

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5-3
Pin No.
MA-308
IC401
MA-308
IC401
^•
MA-308
IC401
MA-308
IC401
&™
MA-308
IC401
I/O
I
O
O
I/O
O
Signal
RESET
V. DATA
V. CLOCK
AF. DATA
AF. CLOCK
I/O level
Normally “H”, “L” when service interruption is detected or restored.
Serial communication data to video microprocessor.
Serial communication clock with video microprocessor.
Serial communication data to audio microprocessor.
Serial communication clock with audio microprocessor.
5-4.
SYSTEM  CONTROL  –  SYSTEM  CONTROL  PERIPHERAL  CIRCUIT  INTERFACE  (MA-308  BOARD  IC401)
5-5.
SYSTEM  CONTROL  –  AUDIO  BLOCK  INTERFACE  (MA-308  BOARD  IC401)
Signal
A MUTE
REC P
SP/EP
Pin No.
MA-308
IC401
MA-308
IC401
MA-308
IC401
!∞
STOP/
FF/
REW
L
L
1
TAPE
LOADING
L
L
1
TAPE
UNLOADING
L
L
1
PB
L
L
2
I/O
O
O
O
REC
L
L
1
REC 
PAUSE
L
H
1
1.
Selected by SP/EP selector. SP mode “L”, EP mode: “H”.
2.
Selected by tape recording mode. SP mode: “L”, EP mode: “H”.
5-6.
SYSTEM  CONTROL  AND  RF  MODULATOR  –  INPUT  SELECTION  BLOCK  INTERFACE  (MA-308  BOARD  IC401)
Signal
LINE SW
Pin No.
MA-308
IC401
I/O level
Input select control signal
I/O
O
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