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Sony HCD-C770 Service Manual page 74

Sacd/dvd receiver
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HCD-C770/C990
QQ
3 7 63 1515 0
• IC Block Diagrams
– RF Board –
IC001 CXD1881AR
64 63
62 61 60 59
INPUT
SEL
ATT
4
DVDRFP
1
MUX
ATT
DVDRFN
2
2
INPUT
IMPEDANCE
SEL
BUFFER
COMPARATOR
A2
3
B2
4
GCA
EQ
C2
5
D2
6
TE
3
3
L 13942296513
FROM
FROM
VC
S-PORT
S-PORT
CP
7
CN
8
D
D
9
C
C
10
GCA
B
B
11
A
A
12
FROM
MUX
S-PORT
CD D
13
CD C
14
GCA
W/LPF
CD B
15
CD A
16
CD/DVD
FROM
S-PORT
GCA
GCA
3
FROM
FROM
S-PORT
S-PORT
VCI FOR SERVO INPUT
VC = VPB/2
www
LD H/L
.
FROM S-PORT
17
18 19 20
21 22
74
http://www.xiaoyu163.com
58
PROGRAMMABLE
INPUT
AGC
BIAS
DIFFERENTIATOR
2
INPUT
IMPEDANCE
SEL
AGCO
+
CLAMP &
ENVELOPE
–
+
2
LEVEL
–
SIGDET
DAC
PHASE
–
–
DETECTOR
+
+
PHASE
DETECTOR
TOPHOLD
TOPHOLD
A+D
+
GCA
+
4
FROM
+
S-PORT
+
B+C
MUX
GCA
3
CD/DVD
IMPEDANCE
B+D
+
+
+
+
SUM
AMP
+
+
A+C
3
–
+
4
HYSTERESISTER
APC SEL
DUAL APC
DVD/CD
x
ao
y
INTERNAL
i
FDGHG
23
24 25
26
27
http://www.xiaoyu163.com
8
57
56
55 54
OUTPUT
FULL WAVE
INHIBIT
RECTIFER
FROM S-PORT
EQUALIZER
FILTER
Q Q
–
OFFSET
3
6 7
1 3
+
CANSEL
4
FROM
S-PORT
–
OFFSET
GCA
LPF
+
CANSEL
5
FROM
S-PORT
OFFSET
GCA
LPF
GCA
SUB
CANSEL
6
CP/CN
CEFDB
FROM
LOW
S-PORT
OFFSET
GCA
LPF
CANSEL
5
FROM
S-PORT
BCA
TOP
DET
HOLD
2
FROM
DAC
S-PORT
& OFFSET
FROM S-PORT
INPUT GAIN
FROM S-PORT
2
MIRR
u163
COMPARATOR
PEAK/BOTTOM
.
HOLD
28 29
30
2 9
9 4
2 8
53 52
51
50
49
FAST ATTACK
AGC
HOLD
AGC CHARGE
PUMP
CONTROL
SERIAL
SIGNALS
PORT
TO EACH
REGISTER
BLOCK
V33 FOR
OUTPUT
3
BUFFER
LPF ATT
CE ATT
POL SEL
CEPOL
BUFFER
PI
FE
TE
MNTR
CE
CONTROL
V25
V125
V25/3
1 5
0 5
8
2 9
9 4
GCA
GCA
GCA
GCA
TE
GCA
GCA
RST
3
FROM
S-PORT
FOR SERVO
PH
OUTPUT
HOLDEN
V25/2
SEL
COMPA-
RATOR
–
+
GCA
SEL
LINKEN
m
BOTTOM
INPUT
AGCO
ENVELOPE
IMPEDANCE
2
FROM S-PORT
co
SINK CURRENT
2
FROM S-PORT
PH
INPUT
BUFFER
MUX
31
32
9 9
48
SDEN
47
SDATA
46
SCLK
45
V33
44
LCP
43
LCN
42
MNTR
2 8
9 9
41
CE
40
FE
39
TE
38
PI
37
V25
36
V125
35
TPH
34
DFT
33
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