Read Sony STR-MD777 Service Manual online
– 8 –
Pin No.
Pin Name
I/O
Function
46
AC CUT
I
Power down detection signal input terminal “L”: power down, normally: “H”
47
SIRCS
I
Sircs remote control signal input from the remote control receiver (IC602)
48
PC POWER REQ
I
Communication request signal input from the equipment connected to control 1 connector
(CN104) “L”: communication request
(CN104) “L”: communication request
49
YBUSCLKO
O
Y bus data transfer clock signal output terminal Not used (open)
50
YBUSBUSY
I
Busy signal input when the Y bus data in/out Not used (open)
51
AVDD
—
Power supply terminal (+5V) (for A/D converter analog system)
52
AVREF0
I
Reference voltage (+5V) input terminal (for A/D converter)
53
KEY1
I
Key input terminal (A/D input)
S614, S617 to S621, S625 to S634 (DISPLAY, I/
S614, S617 to S621, S625 to S634 (DISPLAY, I/
u, DVD/VIDEO, CS/BS, TAPE, MD,
CD1/2/3/4/5, DBFB, GROOVE, PRESET EQ, START, CLEAR) keys input
54
KEY2
I
Key input terminal (A/D input) S622 to S624 (CD, TUNER, MD WALKMAN) keys input
55
KEY3
I
Key input terminal (A/D input)
S635 to S638, S641 to S647 (DISPLAY, SELECT SYNC, SEAMLESS, HIT PARADE, REC IT,
MD1/2/3/4/5, ENTER) keys input
S635 to S638, S641 to S647 (DISPLAY, SELECT SYNC, SEAMLESS, HIT PARADE, REC IT,
MD1/2/3/4/5, ENTER) keys input
56
SPEANA1
I
Spectrum analyzer frequency input from the BA3833F (IC501) (125 Hz)
57
SPEANA2
I
Spectrum analyzer frequency input from the BA3833F (IC501) (500 Hz)
58
SPEANA3
I
Spectrum analyzer frequency input from the BA3833F (IC501) (2 kHz)
59
SPEANA4
I
Spectrum analyzer frequency input from the BA3833F (IC501) (8 kHz)
60
REC LEVEL
I
Not used (fixed at “L”)
61
AVSS
—
Ground terminal (for A/D converter analog system)
62
FL-CS1
(TUNER)
O
Chip select signal output to the FL driver IC (IC601) “L” active
63
FL-CS2 (EDIT)
O
Chip select signal output to the FL driver IC (IC604) “L” active
64
AVREF1
I
Reference voltage (+5V) input terminal (for D/A converter)
65
NC
I
Not used (fixed at “L”)
66
FL-DATA
O
Serial data output to the FL driver IC (IC601, 604)
67
FL-CLK
O
Serial data transfer clock signal output to the FL driver IC (IC601, 604)
68
NC
I
Not used (fixed at “L”)
69
AMP-DATA
O
Serial data output to the M62442FP (IC101)
70
AMP-CLK
O
Serial data transfer clock signal output to the M62442FP (IC101)
71
SUBCLKOUT
O
Sub clock signal output terminal Not used (open)
72
I2C-BUSY
I
Busy signal input terminal for the I2C bus “L” active
73
I2C-DATA
I/O
Data input/output terminal for the I2C bus
74
NC
O
Not used (open)
75
I2C-CLK
I/O
Shift clock signal input/output terminal for the I2C bus
76
FL-CLEAR
O
Reset signal output to the FL driver IC (IC601, 604) “L”: reset
77
AMP-CE
O
Chip enable signal output to the M62442FP (IC101)
78
SPEANA-SW
O
Not used (open)
79
LED-DATA
O
Serial data output to the LED driver IC (IC603, 605)
80
LED-CLK
O
Serial data transfer clock signal output to the LED driver IC (IC603, 605)
81
KED-CS1
O
Chip select signal output to the LED driver IC (IC603) “L” active
82
LED-CS2
O
Chip select signal output to the LED driver IC (IC605) “L” active
83
LED-CLEAR
O
Reset signal output to the LED driver IC (IC603, 605) “L”: reset
84 to 87
YBUS1 to YBUS4
I/O
Y bus data input/output terminal Not used (open)
88
SOFT-CHK
O
Software check terminal Not used (open)
89
MODEL1
I
Destination setting terminal Fixed at “H” in this set
90
MODEL2
I
Destination setting terminal Fixed at “H” in this set
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