Read Sony SCD-XB780 Service Manual online
SCD-XB780
20
20
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM – RF/SERVO Section –
MUTE LOAD
DETECTOR
1
63
3
4
5
6
9
10
11
12
14
15
16
13
18
17
61
62
53
52
54
55
59
60
DVDRFP
RFSIN
A2
B2
C2
D2
CD E
CD F
A
B
C
D
A
B
C
D
A
B
C
C
D
A
B
C
D
CD A
CD B
CD C
CD C
CD D
DVDLD
CDPD
CDLD
DVDPD
DVDPDSW
MUX
ATT
ATON
ATOP
FNP
FNN
INPUT
BIAS,
AGC
PROGRAMMABLE
EQ FILTER
DIFFERENTIATOR
AIP
AIN
DIP
DIN
SUMMING AMP
IC004 (1/4)
SUMMING AMP
IC004 (2/4)
GCA
MUX
DUAL
APC
GCA,
EQ
GCA
L. P. F.
+
–
–
PHASE
DETECTOR
COMPARATOR
MUX
+
–
–
+
–
–
+
+
+
+
+
+
+
+
+
+
–
–
CLAMP&
ENVELOPE
LEVEL DAC
GCA
SUB
GCA
SEL
L. P. F.
OFFSET
CANCEL
MUX
BOTTOM
ENVELOPE
INPUT
BUFFER
PEAK/
BOTTOM
HOLD
SERIAL
PORT
REGISTER
57
27
31
32
39
47
46
48
FULL WAVE
RECTIFER
AGC
CHARGE PUMP
AVC BUFFER
IC004 (4/4)
AVC
(+1.65V)
A+3.3V
WAVRB BUFFER
IC503 (1/2)
WAVRB
D+5V
VC
(+2.5V)
VC
AGCO
SACD/CD RF AMP,
FOCUS/TRACKING ERROR AMP
IC001
OPTICAL PICK-UP
BLOCK
(KHM-234AMA)
MODULE
CIRCUIT
2AXIS
DEVICE
FOCUS/
FOCUS/
TRACKING
COIL
21
22
23
12
5
11
6
9
AUTOMATIC POWER
CONTROL (FOR CD)
Q003
AUTOMATIC POWER
CONTROL (FOR SACD)
Q001
FOCUS COIL
DRIVE
14
2
13
3
TRACKING COIL
DRIVE
17
24
18
23
33
34
20
22
21
19
8
40 41 39 43
31
32
29
30
20
SLED MOTOR
DRIVE
FOCUS/TRACKING COIL DRIVE,
SLED MOTOR DRIVE
IC502
M
M2
(SLED)
8
9
SPINDLE MOTOR
DRIVE
M
M
M3
(SPINDLE)
6
5
LOADING MOTOR
DRIVE
M
M
M151
(LOADING)
16
17
13
FOCUS/TRACKING/SLED
PWM GENERATOR
FFDR
FRDR
TFDR
TRDR
SFDR
SRDR
SERVO
INTERFACE
SERVO AUTO
SEQUENCER
A/D
CONVERTER
FOCUS
TRACKING/SLED
SERVO DSP
DFCT, FOK
DETECTOR
26
SE
TE
FE
RFDC
TE
FE
PI
26
DIGITAL SERVO
PROCESSOR
IC509 (1/2)
TO CPU INTERFACE
D+3.3V
S1
(LIMIT)
MIRR
FOK
DFCT
COUT
SCLK
SSTP
STBY1
STBY2
RF
A
B
C
D
E
F
G
H
DVD LD
CD LD
DVD/CD PD
DVD VR
FCS+
FCS–
TRK+
TRK–
D
C
B
A
AGCO
RFAC
MIRR
MIN
MEVO
PI
FE
TE
TE
SDATA
SCLK
SDEN
LDON
LOAD OUT
LOAD IN
MUTE 2D
SPDA
F JMP1
F JMP2
• SIGNAL PATH
: SACD PLAY
: CD PLAY
2
RFAC
(Page 21)
3
TE, FE, PI
(Page 22)
4
SDATA, SCLK, SDEN
(Page 22)
5
LDON
(Page 21)
DVDPDSW, CDPDSW
(Page 22)
10
SPDA, F JMP1/2
(Page 21)
11
SPIN
(Page 21)
12
MUTE 2D, SP ON, MUTE LOAD
(Page 22)
13
LOAD IN/OUT
(Page 22)
8
FOK, MIRR,
COUT, SCLK
(Page 22)
TRKSW
(Page 22)
DRVC BUFFER
IC503 (2/2)
DRVC
(+2.5V)
D+5V
SPINDLE MOTOR
DRIVE
42
MNTR
FE
PI
PI
FE
TE
SDATA
SCLK
SDEN
MIRR
FOK
COUT
SCLK
9
(Page 22)
LIM SW
BUFFER
BUFFER
2
SP ON
MUTE2
MUTE1
SPINDLE/LOADING MOTOR DRIVE
IC512
21
22
24
15
23
L. P. F.
GCA
OFFSET
CANCEL
40
L. P. F.
OFFSET
CANCEL
38
PI ERROR AMP
IC004 (3/4)
24
PHOTO DIODE
CONTROL SWITCH
(FOR SACD)
Q005
CD VR
PHOTO DIODE
CONTROL SWITCH
(FOR CD)
Q004
TRACKING COIL DRIVE
CONTROL SWITCH
IC501
1
2
4
1
2
CDPDSW
7
6
TRACKING COIL DRIVE
CONTROL SWITCH
IC505
27
26
1
(Page 21)
SP ERR
25
4
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