Read Sony SCD-XB780 Service Manual online
60
SCD-XB780
•
MAIN BOARD IC904 ISPLSI2032VE-110LT44-SA (PROGRAMMABLE LOGIC DEVICE)
Pin No.
Pin Name
I/O
Description
1
TRKSW
O
Tracking coil drive on/off control signal output “H”: drive on
2
ZEROL
I
L-ch zero data flag detection signal input from the digital filter
3
FS64
O
Clock signal (2.8224 MHz) output to the digital filter and DSD decoder
4
FS128
O
Clock signal (5.6448 MHz) output to the DSD decoder
5
YO
I
Clock signal (11.2896 MHz) input from the digital filter
6
VCC
—
Power supply terminal (+5V) (digital system)
7
XBSCAN
—
Not used
8
TDI
—
Not used
9
XCS
I
Chip select signal input from the CPU
10
XRD
I
Read strobe signal input from the CPU
11
XWR
I
Write strobe signal input from the CPU
12 to 16
D0 to D4
I/O
Two-way data bus with the SACD decoder and the CPU
17
GND
—
Ground terminal (digital system)
18
TDO
—
Not used
19 to 21
D5 to D7
I/O
Two-way data bus with the SACD decoder and the CPU
22
A
I
Address signal input from the CPU
23
CDPDSW
O
Photo diode for CD on/off control signal output “L”: photo diode on
24
RST
I
Reset signal input from the CPU “L”: reset
25
RST DSD
O
Reset signal output to the DSD decoder “L”: reset
26
RST DP
O
Reset signal output to the fluorescent indicator tube driver “L”: reset
27
TCK
—
Not used
28
VCC
—
Power supply terminal (+5V) (digital system)
29
XRESET
—
Not used
30
TMS
—
Not used
31
RST DVD
O
Reset signal output to the SACD decoder “L”: reset
32
RST CD
O
Reset signal output to the digital signal processor “L”: reset
33
DVDPDSW
O
Photo diode for SACD on/off control signal output “L”: photo diode on
34
MULTI
O
Multi/2ch selection signal output “L”: 2ch, “H”: multi
35
SDEN
O
Serial data enable signal output to SACD/CD RF amplifier
36
ISBTEST
O
Output terminal for disc inspection mode to DSD decoder
37
RMUTE
O
Front R-ch muting on/off control signal output “L”: muting on
38
LMUTE
O
Front L-ch muting on/off control signal output “L”: muting on
39
GND
—
Ground terminal (digital system)
40
GOE
—
Not used
41
ZEROR
I
R-ch zero data flag detection signal input from the digital filter
42
ZEROL
I
Front L-ch zero data flag detection signal input from the DSD decoder
43
ZEROR
I
Front R-ch zero data flag detection signal input from the DSD decoder
44
LIM SW
I
Detection signal input from limit in switch The optical pick-up is inner position when “H”
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