Sony SCD-XB770, Service Manual

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67
SCD-XB770
Pin No. Pin Name I/O Description
50 SCK DSD O
Serial data transfer clock signal output to the DSD decoder (IC801) and CXD9647R (IC803)
51 LD ON O
Laser diode on/off control signal output to the CXD1881R (IC001)
“L”: laser diode off, “H”: laser diode on
52 XDIS IO O
Reset signal output to the I/O expander (IC902) “L”: reset
53 SDOUT O
Serial data output to the MSM9202 (IC801)
54 SLK O
Serial data transfer clock signal output to the MSM9202 (IC801)
55 VSS —
Ground terminal (digital system)
56 REQ O
Request signal output to the MSM9202 (IC801)
57 FCS BST O
Focus boost signal output terminal Not used (open)
58 GFS DVD I
Guard frame sync signal input from the CXD1882R (IC701)
59 LED DRV O
LED drive signal output of the multi-channel indicator (D803) “H”: LED on
60 KEY 0 I
Key input terminal (A/D input) S807 to S809 ( H , X , x ) keys input
61 KEY 1 I
Key input terminal (A/D input)
S801 to S805 (
j , J , MENU, SACD/CD, MILTI/2CH) keys input
62 KEY 2 I
Key input terminal (A/D input) S812, S830 (TIME/TEXT, PUSH ENTER) keys input
63 KEY 3 I
Key input terminal (A/D input) S806 ( A OPEN/CLOSE) key input
64 JITTER I
Jitter signal input
65 TE I
Tracking error signal input from the CXD1881R (IC001)
66 SP ERR I
Spindle motor backward voltage input terminal
67 FE/PI I
Focus error signal input from the CXD1881R (IC001)
68 AVSS —
Ground terminal (for A/D converter)
69 AVREF I
Reference voltage input terminal (for A/D converter)
70 AVDD —
Power supply terminal (+3.3V) (for A/D converter)
71 GFS CD I
Guard frame sync signal input from the CXD3068Q (IC509)
72 SCLK CD O
SENSE serial data reading clock signal output to the CXD3068Q (IC509)
73 1/2 LD —
Not used (open)
74 FOK CD I
Focus OK signal input from the CXD3068Q (IC509)
75 LOCK CD I
GFS is sampled by 460 Hz “H” input when GFS is “H”
76 XRF AD CE O
Chip enable signal output to the A/D converter Not used (open)
77 SDCLK RF O
Serial data transfer clock signal output to the CXD1881R (IC001)
78 EEPSIO I/O
Two-way data bus with the EEPROM (IC903)
79 EEPSCL O
Clock signal output to the EEPROM (IC903)
80 RXD I
Serial data input from the RS-232C (for check)
81 TXD O
Serial data output to the RS-232C (for check)
82 RM I
Remote control signal input from the remote control receiver (IC802)
83 SDATA RF I/O
Two-way data bus with the CXD1881R (IC001)
84 XWR O
Write strobe signal output to the CXD1882R (IC701) and I/O expander (IC902)
85 XRD O
Read strobe signal output to the CXD1882R (IC701) and I/O expander (IC902)
86 NC —
Not used (fixed at “H” )
87 VDD —
Power supply terminal (+3.3V) (digital system)
88 VSS —
Ground terminal (digital system)
89 to 91 A0 to A2 O
Address signal output to the CXD1882R (IC701) and I/O expander (IC902)
92 to 96 A3 to A7 O
Address signal output to the CXD1882R (IC701)
97 INIT DF O
Initial signal output to the digital filter Not used
98 LATCH DF O
Latch signal output to the digital filter (IC301 to IC303)
99 SHIFT DF O
Shift signal output to the digital filter (IC301 to IC303)
100 SCDATA DF O
Serial data output to the digital filter (IC301 to IC303)