Sony SCD-XB770 Service Manual page 50

SCD-XB770
• MAIN BOARD IC902 CXD1095BR (I/O EXPANDER)
Pin No.
Pin Name
1
MUT CD
2
MUT 2D
3 MUT LOAD
4
SP ON
5
PB5
6
TBLL
7 TBLR
8
VSS
9
PC0
10
D SENS
11, 12 S1, S2
13
LOAD OUT
14
PC5
15
LOAD IN
16 A1OUT
17
NC
18
RST DSD
19
RST DP
20 RST DVD
21
RST CD
22
VMOD
23
VSS
24
VDD
25
MULTI
26
SDEN
27
ISBTEST
28 to 30
D0 to D2
31, 32
NC
33 to 37
D3 to D7
38
XCLR
39
XDIS
40
VSS
41
XWR
42
XRD
43 XCS
44 to 46
A0 to A2
47, 48
PE0, PE1
49
NC
50 PE2
51
CDMODESEL
52
HDMODESEL
53
XZLAT
54 CD SACD
55
VSS
50
I/O
O
Muting on/off control signal output to the CXD3068Q (IC509) "L": muting on
O
Muting control signal output to the BA5983FP (IC502)
O Muting control signal output to the BA5912AFP (IC512)
O
Muting control signal output to the BA5912AFP (IC512)
—
Not used (open)
O
Table motor drive signal (counterclockwise direction) output terminal Not used (pull up)
O Table motor drive signal (clockwise direction) output terminal Not used (pull up)
—
Ground terminal (digital system)
—
Not used (open)
I
Disc status detection signal input terminal Not used (fixed at "L")
I Disc tray position detection signal input terminal Not used (fixed at "H")
O
Loading motor drive signal (loading out direction) output to the BA5912AFP (IC512)
—
Not used (open)
O
Loading motor drive signal (loading in direction) output to the BA5912AFP (IC512)
O Control A1 signal output terminal Not used (open)
—
Not used (open)
O
Reset signal output to the DSD decoder (IC801) and CXD9647R (IC803) "L": reset
O
Reset signal output to the MSM9202 (IC801) "L": reset
O Reset signal output to the CXD1882R (IC701) "L": reset
O
Reset signal output to the CXD3068Q (IC509) "L": reset
Power on/off control signal output for modulation circuit on optical pick-up block
O
"L": power off, "H": power on
—
Ground terminal (digital system)
—
Power supply terminal (+3.3V) (digital system)
O
Multi/2ch selection signal output "L": 2ch, "H": multi
O
Serial data enable signal output to CXD1881R (IC001)
O
Output terminal for disc inspection mode to DSD decoder (IC801)
I/O
Two-way data bus with the CXD1882R (IC701) and the CPU (IC901)
—
Not used (open)
I/O
Two-way data bus with the CXD1882R (IC701) and the CPU (IC901)
I
Clear signal input terminal
I
Reset signal input from the CPU (IC901) "L": reset
—
Ground terminal (digital system)
I
Write strobe signal input from the CPU (IC901)
I
Read strobe signal input from the CPU (IC901)
I Chip select signal input from the CPU (IC901)
I
Address signal input from the CPU (IC901)
—
Not used (open)
—
Not used (open)
— Not used (open)
O
CD mode selection signal output to the CXD9647R (IC803)
O
HD mode selection signal output to the CXD9647R (IC803)
O
Serial data latch pulse signal output to the CXD9647R (IC803)
O SACD/CD mode selection signal output terminal Not used
—
Ground terminal (digital system)
Description
Not used (fixed at "H")