Sony SCD-XB940, Service Manual

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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)