SCD-1, SCD-777ES (serv.man4) - Sony Audio Service Manual (repair manual). Page 9

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9
9
SCD-1/777ES
4-5.
BLOCK  DIAGRAM  – MAIN Section (2/3) –
56–63
18–21, 23–24
SERVO DIGITAL
SIGNAL PROCESSOR
IC512 (3/3)
HO0/HD0-HO6/HD6
HIO/HD7
72
28–30,
33–37
D0–D7
39 41 42 43
70
71
89
70
71
72
99
63
HCK/XHLBS
HR/XHRD
HFS/XHWR
GATE SWITCH
IC737
GATE SWITCH
IC736
SDSCS
RD
HWR LWR RES
RESET SIGNAL
GENERATER
IC734
DIG+5V
D0–D15
36-43, 45-55
A0–A18
CPU
IC701 (3/4)
87
58
91
90
98 100
10
11
A21 A22 A20
1 2 6
A B G1
Y5
Y4
SWITCHING
IC775
ARPINT
WAIT
CS0
CS1
44–46
A0–A2
XDIS
XWR
XRD
XCS
EXPANDER
IC712
(3/3)
28–30,
33–37
D0–D7
39 41 42 43
44–46
A0–A2
XDIS
XWR
XRD
XCS
EXPANDER
IC711
(2/3)
59–62,
64–67
D0–D7
70–73,
75–78
A0–A7
56 57 80 81
XWR
XRD
XINT
XCS
XWAT
ARP
IC702
(2/2)
83
3, 4–11,
34–42
A0–A17
15–22,
24–31
DQ0–DQ15
12 14 43
CE
OE
WE
FLASH MEMORY
IC716
21
84
ARPRST
XRST
GATE
SWITCH
IC778
1–4, 7, 10–16,
17–20, 31
A0–A16
21–23,
25–29
IO/1–IO/8
5 30 32
WE
CE1
OE
S-RAM
IC717
A0–A16
21–23,
25–29
IO/1–IO/8
5 30 32
WE
CE1
OE
S-RAM
IC718
1–4, 7, 10–16,
17–20, 31
05
23
RESET
(Page 12)
ADDRESS BUS
DATA BUS
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