Sony SCD-XE680 Service Manual ▷ View online
41
SCD-XE680
2.5 Vp-p
29.5 ns
wd
IC801
qa
(MCKI), IC811
qs
3.7 Vp-p
354 ns
1.4 Vp-p
50 ns
3.7 Vp-p
177 ns
wf
IC801
tl
(BCKAI), IC904
4
(FS128)
wj
IC901
ra
(EXTAL)
wg
IC801
ya
(PHREFI), IC904
3
(FS64)
wh
IC811
1
, IC904
5
(YO)
2.9 Vp-p
88.6 ns
3.4 Vp-p
472 ns
2.9 Vp-p
88.6 ns
3.4 Vp-p
88.6 ns
2.5 Vp-p
88.6 ns
es
IC304
4
, IC301
ed
(PSCK),
ef
(DSCK)
ed
IC304
6
ef
IC301
t;
(PBCK) (CD Play mode)
– AUDIO Board –
ea
IC304
1
42
SCD-XE680
3.8 Vp-p
452 ns
1.6 Vp-p
540 ns
rs
IC801
ta
(OSCI)
eg
IC301
ta
(PLRCK) (CD Play mode)
3.4 Vp-p
22.7
µ
s
– DISPLAY Board –
ra
IC801
t;
(OSCO)
43
SCD-XE680
• IC Block Diagrams
– RF Board –
– RF Board –
IC001
CXD1881AR
MUX
ATT
INPUT
BIAS
AGC
GCA
PROGRAMMABLE
EQUALIZER
FILTER
DIFFERENTIATOR
64 63
62 61 60 59
58
57
51
56
1
2
FULL WAVE
RECTIFER
AGC CHARGE
PUMP
+
–
+
–
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
–
–
+
–
–
+
–
–
INPUT
SEL
ATT
2
4
2
2
INPUT
IMPEDANCE
SEL
OFFSET
CANSEL
MNTR
CONTROL
SERIAL
PORT
REGISTER
4
FROM
S-PORT
4
FROM
S-PORT
INPUT
IMPEDANCE
SEL
3
FROM
S-PORT
CLAMP &
ENVELOPE
LEVEL
DAC
SIGDET
AGCO
BUFFER
55 54
53 52
50
49
OUTPUT
INHIBIT
FROM S-PORT
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GCA
CD/DVD
4
FROM
S-PORT
3
FROM
S-PORT
MUX
3
FROM
S-PORT
GCA
3
FROM
S-PORT
3
FROM
S-PORT
EQ
VC
COMPARATOR
PHASE
DETECTOR
PHASE
DETECTOR
A+D
B+D
+
+
+
A+C
B+C
GCA
W/LPF
SUM
AMP
AMP
18 19 20
21 22
24 25
23
26
27
28 29
31
32
30
GCA
GCA
VCI FOR SERVO INPUT
VC = VPB/2
DUAL APC
LD H/L
FROM S-PORT
APC SEL
DVD/CD
TOPHOLD
GCA
TOPHOLD
GCA
41
48
47
46
45
GCA
OFFSET
CANSEL
5
FROM
S-PORT
GCA
40
GCA
OFFSET
CANSEL
6
FROM
S-PORT
3
FROM
S-PORT
GCA
GCA
CEFDB
CP/CN
LOW
IMPEDANCE
CD/DVD
SUB
GCA
MUX
GCA
LPF
GCA
LPF
39
38
37
36
OFFSET
CANSEL
PEAK/BOTTOM
HOLD
BOTTOM
ENVELOPE
INPUT
BUFFER
5
FROM
S-PORT
GCA
LPF
V25/2
TE
RST
35
34
33
FOR SERVO
OUTPUT
PH
TOP
HOLD
GCA
SEL
LINKEN
MUX
HOLDEN
+
–
+
–
COMPA-
RATOR
INTERNAL
FDGHG
HYSTERESISTER
& OFFSET
FROM S-PORT
MIRR
COMPARATOR
COMPARATOR
INPUT GAIN
FROM S-PORT
SEL
DAC
SINK CURRENT
FROM S-PORT
2
AGCO
FAST ATTACK
AGC
HOLD
BCA
DET
DET
2
FROM
S-PORT
PH
2
2
INPUT
IMPEDANCE
FROM S-PORT
44
43
42
V33 FOR
OUTPUT
OUTPUT
BUFFER
PI
FE
TE
CE
V25
V125
V25/3
LPF ATT
POL SEL
BUFFER
CONTROL
SIGNALS
TO EACH
BLOCK
3
CE ATT
CEPOL
D
C
B
A
CD F
CD E
VPB
VC
DVDLD
CDLD
CDPD
DVDPD
LDON
VNB
MIRR
MP
MB
MIN
MEVO
MLPF
CE
SDEN
SDATA
SCLK
V33
FE
TE
PI
V25
V125
TPH
DFT
LINK
LCP
LCN
MNTR
DVDRFP
DVDRFN
A2
B2
C2
D2
CP
CN
D
C
B
A
CD D
CD C
CD B
CD A
RFDC
RFSIN
ATOP
ATON
AIN
AIP
VPA
RFAC
VNA
BYP
DIN
DIP
FNP
FNN
MEV
RX
44
SCD-XE680
IC905
M51957BFP-600C
– MAIN Board –
IC509
CXD3068Q
DOUT
LRCK
PCMD
BCK
DVDD2
ASYE
MD2
EMPH
XTSL
DVSS2
XTAI
XTAO
SQSO
SQCK
SCSY
SBSO
EXCK
SOUT
SOCK
XOLT
SE
TE
VC
TES1
TEST1
DVSS1
FRDR
FFDR
TRDR
TFDR
SRDR
SFDR
DVDD1
FSTO
SSTP
MDP
LOCK
PWMI
FOK
DFCT
DIGITAL
CLV
PROCESSOR
OSC
DIGITAL
OUT
EFM
DEMODULATOR
32K
RAM
ERROR
CORRECTOR
D/A DIGITAL
INTERFACE
MIRR, DFCT,
FOK
DETECTOR
CPU
INTERFACE
SUBCODE
PROCESSOR
SERVO
AUTO
SEQUENCER
SERVO INTERFACE
DVDD0
XRST
MUTE
D
ATA
XLA
T
CLOK
SENS
SCLK
A
TSK
WFCK
XUGF
XPCK
GFS
C2PO
SCOR
C4M
WDCK
DVSS0
COUT
MIRR
A
VDD0
IGEN
A
VSS0
ADIO
RFDC
CE
TE
A
VSS1
RF
AC
ASYI
ASYO
BIAS
A
VDD1
PCO
FILI
FILO
CL
TV
V16M
VCTL
VPCO
59 58
57 56 55 54 53 52
51 50 49 48
47 46 45 44 43 42 41
1
2
3
4
5
6
7
8 9 10 11 12 13 14 15 16 17 18 19 20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
OPERA
TIONAL
AMPLIFIER &
ANALOG SWITCH
A/D
CONVER
TER
FOCUS
PWM
GENERATOR
TRACKING
PWM
GENERATOR
SLED
PWM
PWM
GENERATOR
FOCUS
SERVO
SERVO
DSP
TRACKING
SERVO
DSP
SLED
SERVO
DSP
ASYMMETRY
CORRECTOR
DIGITAL
PLL
CLOCK
GENERATOR
60
+
–
4
NC
INPUT
NC
GND
1.25V
1 2
3
5
6
7
8
DELAY
CAPACITOR
OUTPUT
SUPPLY
VOLTAGE
NC
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