Sony SCD-XB770 Service Manual page 33

• IC Block Diagrams
– RF Board –
IC001 CXD1881R
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
3 3
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
LD H/L
FROM S-PORT
17 18 19 20 21 22
58
PROGRAMMABLE
INPUT
AGC
BIAS
DIFFERENTIATOR
2
INPUT
IMPEDANCE
SEL
AGCO
+
CLAMP &
– ENVELOPE
+
2
LEVEL
–
SIGDET
DAC
PHASE
– –
DETECTOR
+
+
PHASE
DETECTOR
A+D
+
GCA
+
4
FROM
+
S-PORT
+
B+C
MUX GCA
3
CD/DVD
IMPEDANCE
B+D
+
+
+
+
SUM
AMP
+
+
A+C
3
–
+
4
APC SEL
DUAL APC
DVD/CD
INTERNAL
FDGHG
23 24 25 26 27
57 56 55 54
OUTPUT
FULL WAVE
INHIBIT
RECTIFER
FROM S-PORT
EQUALIZER
FILTER
TOPHOLD
–
OFFSET
+ CANSEL
TOPHOLD
4
FROM
S-PORT
–
OFFSET
GCA LPF
+ CANSEL
5
FROM
S-PORT
OFFSET
GCA LPF SUB GCA
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
HYSTERESISTER
& OFFSET
FROM S-PORT
INPUT GAIN
FROM S-PORT
2
MIRR
COMPARATOR
PEAK/BOTTOM
HOLD
28 29 30
SCD-XB770
53 52 51 50
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
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
BOTTOM
INPUT
AGCO
ENVELOPE
IMPEDANCE
2
FROM S-PORT
SINK CURRENT
2
FROM S-PORT
INPUT
BUFFER
MUX
31 32
49
48 SDEN
47 SDATA
46 SCLK
45 V33
44 LCP
43 LCN
42 MNTR
41 CE
40 FE
39 TE
38 PI
37 V25
36 V125
35 TPH
34 DFT
33 LINK
PH
33