Read Sony SCD-XB940 (serv.man2) Service Manual online
19
Pin No.
Pin Name
I/O
Description
55, 56
EXPO0, EXPO1
O
Not used (open)
57
SPDLSTOP
O
Spindle motor control signal output terminal
58
GND
—
Ground terminal
59
MCK
I
Clock input terminal (27MHz)
60
GND
—
Ground terminal
61
DSLED
O
Not used (open)
62
XHDSPCS
O
Not used (open)
63
OSCW2
I
Open/close switch (S1) (close) input terminal
64
OSCW1
I
Open/close switch (S1) (open) input terminal
65 to 67
TSW3 to TSW1
I
Not used (open)
68
DSW1
I
Not used (fixed at “L”)
69, 70
TRNS, TRMP
O
Not used (fixed at “H”)
71
AVDRST
O
Reset signal output to the DSD decoder (IC617) “L”: reset
72
AVDWT
I
Not used (fixed at “H”)
73
XJGWT
I
Not used (fixed at “H”)
74
XJGCS
O
Not used (open)
75
AVDRQ1IN
I
Not used (fixed at “H”)
76
AVDRQ0IN
I
Not used (fixed at “H”)
77
AVDADO
O
Not used (open)
78
NC
—
Not used (open)
79, 80
GND
—
Ground terminal
81
VDD
—
Power supply terminal (+3.3V)
82
NC
—
Not used (open)
83
CKSW2
I
Not used (fixed at “H”)
84, 85
EXPI1, EXPI2
I
Not used (fixed at “L”)
86
UCSW
I
Not used (fixed at “L”)
87
DLSW
I
Not used (fixed at “L”)
88
CKSW1
I
Not used (fixed at “H”)
89, 90
CKMM, CKMP
O
Not used (open)
91, 92
LDMM, LDMP
O
Loading motor (M1) control signal output to the loading motor drive (IC615)
93
XDRVMUTE
O
Muting signal output terminal “L”: muting
94
SPGAIN
O
Spindle gain control signal output terminal
95
KARAOKEON
O
Not used (open)
96
XDACS2
O
Not used (open)
97
XDACS3
O
Not used (open)
98
MUTE
O
Muting signal output to the RF signal decoder (IC622)
99
MD2
O
Mode control signal output to the RF signal decoder (IC622)
100
VDD
—
Power supply terminal (+3.3V)
101
GND
—
Ground terminal
102
NORF
I
RF signal input from the RF signal decoder (IC622)
103
DFCT
O
Defect signal output to the RF signal decoder (IC622)
104
FWON
I
Control signal input from the RF signal decoder (IC622)
105
LOCK
I
FG reference clock signal input from the RF signal decoder (IC622)
106
ARPRST
O
Reset signal output to the RF signal decoder (IC622) “L”: reset
107
ARPINT
I
Interrupt signal input from the RF signal decoder (IC622)
108
ARPWT
I
Wait signal input from the RF signal decoder (IC622)
109
ARPWR
O
Write enable signal output to the RF signal decoder (IC622)
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