Sony SCD-XB790-1 Schematic
SCD-XB790
General
Laser Semiconductor laser
(Super Audio CD: λ = 650 nm)
(CD: λ = 780 nm)
Emission duration: continuous
Laser radiant power: 5.47 uW at 650 nm
*These output is the value measured at a distance of about
200mm from the objective lens surface on the optical pick-up.
Power requirements 230 V AC, 50/60 Hz
Power consumption 25 W
Dimensions (w/h/d) 430 × 111 × 283 mm incl. projecting
parts
Mass (approx.) 5.8 kg
Supplied accessories
• Audio connecting cord
Stereo cable (1)
•Remote commander RM-SX700 (1)
• R06 (size-AA) batteries (2)
Design and specifications are subject to change without notice.
SERVICE MANUAL
Ver 1.0 2003.04
SPECIFICATIONS
When a super audio CD is played
Playing frequency range 2 Hz to 100 kHz
Frequency response 2 Hz to 50 kHz (–3 dB)
Dynamic range 104 dB or more
Total har monic distortion rate
Wow and flutter Val ue of measurable limit (±0.001 %
When a CD is played
Frequency response 2 Hz to 20 kHz
Dynamic range 99 dB or more
Total har monic distortion rate
Wow and flutter Val ue of measurable limit (±0.001 %
0.0018 % or less
W. PEAK) or less
0.002 % or less
W. PEAK) or less
Output connector
Jack type
Output level
Phono
ANALOG OUT
DIGITAL (CD)
OUT
OPTICAL*
DIGITAL (CD)
OUT
COAXIAL*
PHONES
*Output only the audio signals of the CD
jacks
Square
optical
output
connector
Coaxial
output
connector
Stereo
phone jack
2 Vrms
(at 50 kilohms)
–18 dBm
0.5 Vp-p
10 mW
AEP Model
UK Model
Model Name Using Similar Mechanism SCD-XB780
CD Mechanism Type CDM66B-DVBU6B
Base Unit Name DVBU-6B
Optical Pick-up Name KHM-234AMA
Load impedance
Over 10 kilohms
Light emitting
wave length:
( )
660 nm
75 ohms
32 ohms
9-877-171-01 Sony Corporation
2003D0500-1 Home Audio Company
C 2003.04 Published by Sony Engineering Corporation
SUPER AUDIO CD PLAYER
SCD-XB790
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM – RF/SERVO Section –
DETECTOR
OPTICAL PICK-UP
BLOCK
(KHM-234AMA)
MODULE
CIRCUIT
2AXIS
DEVICE
FOCUS/
TRACKING
(Page 21)
COIL
1
DVD LD
CD LD
DVD/CD PD
DVD VR
CD VR
FCS+
FCS–
TRK+
TRK–
SP ERR
RF
A
B
C
D
E
F
G
H
CONTROL SWITCH
CONTROL SWITCH
VC
(+2.5V)
PHOTO DIODE
(FOR SACD)
Q005
PHOTO DIODE
(FOR CD)
Q004
M2
(SLED)
M3
(SPINDLE)
M151
(LOADING)
SUMMING AMP
IC004 (1/4)
SUMMING AMP
IC004 (2/4)
AUTOMATIC POWER
CONTROL (FOR SACD)
Q001
AUTOMATIC POWER
CONTROL (FOR CD)
Q003
DVDPDSW
FOCUS/TRACKING COIL DRIVE,
12 5
11 6
14 2
13 3
M
17 24
18 23
25
MM
MM
CBA
D
A
B
C
D
A
B
C
D
CDPDSW
SLED MOTOR DRIVE
IC502
FOCUS COIL
DRIVE
TRACKING COIL
DRIVE
SLED MOTOR
DRIVE
SPINDLE MOTOR
DRIVE
1
63
3
4
5
6
18
17
12
11
10
9
16
15
14
13
21
22
23
24
DVDRFP
RFSIN
A2
B2
C2
D2
CD E
CD F
A
B
C
D
CD A
CD B
CD C
CD D
DVDLD
CDLD
DVDPD
CDPD
STBY1
STBY2
MUX ATT
GCA,
EQ
GCA
MUX
DUAL
APC
9
20
27
26
A
C
B
D
IC512
DRIVE
DRIVE
AIP
59
AIN
60
PHASE
DETECTOR
+
+
+
+
1 241 2
ATON
61
ATOP
62
COMPARATOR MUX
VC
+
–
GCA
L. P. F.
TRACKING COIL DRIVE
CONTROL SWITCH
IC501
SPINDLE/LOADING MOTOR DRIVE
8
SPINDLE MOTOR
9
6
LOADING MOTOR
5
INPUT
BIAS,
AGC
+
–
SACD/CD RF AMP,
FOCUS/TRACKING ERROR AMP
15
16 17
24
23
CLAMP&
ENVELOPE
LEVEL DAC
GCA
IC001
4
BUFFER
BUFFER
PROGRAMMABLE
DIFFERENTIATOR
MUTE2
MUTE1
EQ FILTER
AGCO
+
–
L. P. F.
+
–
+
+
TRACKING COIL DRIVE
SEL
SUB GCA
L. P. F.
L. P. F.
CONTROL SWITCH
IC505
MUTE 2D
SP ON
13
MUTE LOAD
2
LOAD OUT
21
LOAD IN
22
FNP
FNN
AGCO
535254
OFFSET
CANCEL
OFFSET
CANCEL
OFFSET
CANCEL
BOTTOM
ENVELOPE
F JMP1
F JMP2
SPDA
DIP
DIN
55
FULL WAVE
RECTIFER
CHARGE PUMP
FFDR
33
FRDR
34
TFDR
31
TRDR
32
SFDR
29
SRDR
30
AGC
SERIAL
PORT
REGISTER
GCA
MUX
INPUT
BUFFER
PEAK/
BOTTOM
HOLD
DIGITAL SERVO
PROCESSOR
IC509 (1/2)
FOCUS/TRACKING/SLED
RFAC
57
TE TE
39
SDATA
SCLK
SDEN
FE
PI
MEVO
MIN
MIRR
LDON
PWM GENERATOR
SDATA
47
46
48
42MNTR
40
PI ERROR AMP
38
32
31
27
26
TE
40 41 39 43
TE
SE
A/D
CONVERTER
FOCUS
TRACKING/SLED
SERVO DSP
D+3.3V
SCLK
SDEN
IC004 (3/4)
PI
FE
FE
RFDC
SSTP
26
PIFETE
DFCT, FOK
DETECTOR
SERVO
INTERFACE
SERVO AUTO
SEQUENCER
TO CPU INTERFACE
S1
(LIMIT)
FOK
MIRR
DFCT
COUT
SCLK
RFAC
2
(Page 21)
• SIGNAL PATH
: SACD PLAY
: CD PLAY
TE, FE, PI
SDATA, SCLK, SDEN
FE
PI
22
20
21
19
8
FOK
MIRR
COUT
SCLK
AVC
(+1.65V)
WAVRB
DRVC
(+2.5V)
AVC BUFFER
IC004 (4/4)
WAVRB BUFFER
IC503 (1/2)
DRVC BUFFER
IC503 (2/2)
MUTE 2D, SP ON, MUTE LOAD
A+3.3V
D+5V
D+5V
LDON
DVDPDSW, CDPDSW
TRKSW
FOK, MIRR,
COUT, SCLK
LIM SW
SPDA, F JMP1/2
SPIN
LOAD IN/OUT
10
11
12
13
3
4
5
6
7
8
9
(Page 22)
(Page 22)
(Page 21)
(Page 22)
(Page 22)
(Page 22)
(Page 22)
(Page 21)
(Page 21)
(Page 22)
(Page 22)
2020
5-2. BLOCK DIAGRAM – SERVO Section –
SCD-XB790
2
(Page 20)
11
(Page 20)
5
(Page 20)
1
(Page 20)
10
(Page 20)
14
(Page 22)
15
(Page 22)
16
(Page 22)
RFAC
SPIN
LDON
SP ERR
SPDA, F JMP1/2
D0 – D7
A0
XHRD, XHWR
DVC
(+1.65V)
CPU
IC901 (1/3)
LD ON
100
ADDRESS BUS
DVC BUFFER
IC703 (2/2)
DIGITAL SIGNAL
PROCESSOR
RFAC
50
ASYI
49
ASYO
48
SP ERR
59
DATA BUS
IC509 (2/2)
ASYMMETRY
CORRECTOR
FCS JMP1
FCS JMP2
7 8
F JMP1
F JMP2
A+3.3V
FILTER
53 55 52 54 12
FILI
PCO
FILO
CLTV
XPCK
DIGITAL PLL
TO SERVO AUTO
SEQUENCER
DIGITAL CLV
PROCESSOR
LOCK
MDP
24
25 4 6 5 7 15 79 80 76 77 10 11 13
75
LOCK CD
SPDA
APDO
43 44 64 58 85 84 12 22 23
SPDA
CPU INTERFACE
DATA
SENS
XLAT
CLOK
34 35 36 9 26 33 37 71
XLAT CD
DATA CD
CLOK CD
JITTER
GFS DVD
INTEGRATOR
IC703 (1/2)
DEMODULATOR
PROCESSOR
SBSO
SCOR
SENS CD
SCOR CD
XRD
XWR
XHRD
XHWR
XCS
EFM
SUBCODE
SQSO
EXCK
SQSO CD
XCS DVD
INIT0 DVD
XINT0
XINT1
SQCK
WFCK
RFCK
SQCK CD
A0 – A7 D0 – D7
INIT1 DVD
89 – 96 14 – 21
INTERNAL BUS
EMPH
GFS
68
GFS CD
C4M
32K
RAM
ERROR
CORRECTOR
117
DATA BUS
ADDRESS BUS
RFIN
D+3.3V
6916
XTSL
CLOCK
GENERATOR
D/A
DIGITAL
INTERFACE
MUTE
3
ASSYMMETRY
DASYO
ASF1
111
113 114 115
FILTER
RF
ASF2
XHRD
XHWR
XCS
XINT0
XINT1
DIGITAL
OUT
MD2
63
3
DASYI
XTAO
XTAI
PCMD
BCK
LRCK
C2PO
WDCK
DOUT
XRST
DOCTRL
PLL
D0 – D7
A0 – A7
5, 7, 9 – 14 172 – 176, 1, 2, 4
XRD
17
XWR
18
XCS
19
XINT0
20
XINT1
21
XWAIT
16
107
GFS
109
APEO
72
71
66
67
65
14
17
64
XRST CD
2
MUTE CD
IC708 (1/2)
FFM
DEMODULATOR
CPU
INTERFACE,
DMA
CONTROLLER
AUTHENTICATION
XTL2
XTAL
169167
SPINDLE MOTOR DRIVE
IC708 (2/2)
138
ANALOG
BUFFER
XTL1
170
MIXER
142
144
140
135
66 – 69, 71,
2 – 5, 7 – 10
MDIN1
MDSOUT
MDPOUT
CLVS
SPO
MDB0 – MDB7
73 – 75
MDIN2
SPINDLE
CONRTOL
MAIN DATA ECC & EDC
DVD-ROM CD-ROM
MDB8, MDB9,
MDBA – MDBF
96, 97, 99, 101,
102, 104 – 106
41 – 44, 46 – 49
D-RAM
IC706
WFCK
SCOR
SBSO
EXCK
147148150151137 153 146 155 163 158 160 164
WFCK
SCOR
SBIN
EXCK
XRCI
GSCOR
C2PO
LRCK
CD DSP INTERFACE
SYNC
CONTROL
DESCRAMBLE
DMA CONTROLLER
(PRIORITY RESOLVE & SEQUENCER)
MA0 – MA9
79, 80, 82 – 87,
89, 91
21 – 24, 27 – 32
A0 – A9I/O8 – I/O15I/O0 – I/O7
BCLK
MDAT
SUBCODE
DEINTERLEAVE & ECC
XRAS
XMWR
MA10/MNT1
XMOE
XCAS
3334
171835
OE
WE
RAS
LCAS
UCAS
MDAT
BCLK
LRCK
XRST DVD
XRST
INTERFACE
MA11/MNT2
SACD DECODER
CD ESP
DAC
DBCK
DLRC
DDAT
162
157159939294767895
WAVE SHAPER
Q302
IC701
DMA
FIFO
ATAPI
REGISTER
ATAPI
PACKET FIFO
OPTICAL
TRANSCEIVER
IC309
XRST CD, MUTE CD, XRST DVD
HDB0 –
HDB7
HDB8
HDB9
HDBA –
HDBF
HOST INTERFACE
• SIGNAL PATH
: SACD PLAY
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
768FS (33.8688MHz)
26
29
HA0 –
HA2
XSAK
46
REDY
51
HINT
54
HCS0
62
HCS1
63
XSHD
49
XDCK
48
XSRQ
53
XHRS
23
RFAC
MDAT, BCLK, LRCK
DIGITAL (CD)
OUT OPTICAL
J303
DIGITAL (CD)
OUT COAXIAL
SD0 – SD7
32, 30, 27, 24
44, 41, 39, 35,
40, 43, 45
31, 34, 37,
59, 56, 60
XSAK
XSHD
XDCK
XSRQ
SDEF
XSAK,
XSHD,
XDCK,
XSRQ
WPK
XTAL
17
(Page 22)
18
(Page 22)
19
(Page 23)
20
(Page 22)
21
(Page 22)
22
(Page 22)
23
(Page 22)
24
(Page 22)
25
(Page 22)
2121
SCD-XB790
5-3. BLOCK DIAGRAM – MAIN Section –
(Page 20)
(Page 20)
(Page 20)
(Page 21)
(Page 21)
(Page 21)
(Page 21)
(Page 21)
4
8
3
17
24
22
23
21
SDATA, SCLK, SDEN
FOK, MIRR, COUT, SCLK
TE, FE, PI
REAC
WPK
SDEF
XASK, XSHD,
XDCK, XSRQ
SD0 – SD7
XSAK
XSHD
XDCK
XSRQ
LEVEL SHIFT
IC813
A1
2 18
A2
3 17
A3
4
A4
5 15
LEVEL SHIFT
IC814
LEVEL SHIFT
A1 –
A8
2 – 9
IC812
D-RAM
IC808
B1
B2
B3
B4
B1 –
B8
DQ0 – DQ7
16
11 – 18
2, 3, 5, 6,
8, 9, 11, 12
126 WARFI
123
WCK
168
SDEF
167
XSAK
165
XSHD
SDCK
166
164
XSRQ
169 – 176
SD0 – SD7
134 – 131
139 – 136,
DSD DECODER
IC801
DSALS
MSDATO
MSDATI
XMSLAT
SMUTE
MSREADY
DQ0 – DQ7A0 – A11
64
DSAL
66DSAR
74
76DSARS
69DSAC
71DSASW
61PHREFI
59BCKAI
MCKI
11 12
6
4
MSCK
3
2
10
7
3-MULTIPLYING
IC811
13 1
11
10 4
9 5
8
SDATAL
SDATAR
SDATALS
SDATARS
SDATAC
SDATALF
2
3
6
64FS
128FS
• SIGNAL PATH
: SACD PLAY
256FS
SDATAL, SDATAR, SDATALS, SDATARS,
SDEN
SDATA
SCLK
FOK
MIRR
COUT
SCLK
TE
FE
X901
20MHz
83
DATA RF
77
CLK RF
74
FOK CD
25
MIRR RF
29
COUT CD
72
SCLK CD
65
TE
FE
67
66PIPI
40 XTAL
41 EXTAL
SIN DSD
48
SOUT DSD
49
SCK DSD
50
XLAT DSD
47
MUTE DSD
51
RDY DSD
27
LATCH DF
98
97
INIT DF
CPU
IC901 (2/3)
LOAD IN
LOAD OUT
IN SW
OUT SW
EEPSIO
EEPSCL
XRST
XCS IO
XDIS IO
45
46
30
31
78
79
38
11
52
LOAD IN
LOAD OUT
S272
(LOADING IN)
S271
(LOADING OUT)
SDA
5
6
SCL
EEPROM
IC903
RESET SIGNAL
GENERATOR
IC905
64FS
FS64
3
128FS
4
35
SDEN
9
XCS
RST
24
FS128
XRD
XWR
ZEROL
ZEROR
LMUTE
RMUTE
5YO
D0 – D7
12 – 16, 19 – 21
22A
10
11
2
41
38
37
34MULTI
XHRD
XHWR
ZEROL
ZEROR
LMUTE
RMUTE
SDATAC, SDATALF, 64FS
DATA BUS
LOAD IN/OUT
D0 – D7
A0
XHRD, XHWR
ZEROL, ZEROR
LMUTE, RMUTE
MULTI
26
27
13
14
15
16
28
29
30
(Page 23)
(Page 23)
(Page 20)
(Page 21)
(Page 21)
(Page 21)
(Page 23)
(Page 23)
(Page 23)
(Page 21)
(Page 21)
(Page 20)
(Page 21)
XTAL
25
768FS (33.8688MHz)
18
MUTE 2D, SP ON, MUTE LOAD
12
XRST CD, MUTE CD, XRST DVD
20
20, 19
A0 – A11
21 – 24, 27 – 32,
16
CAS
RAS
17
WE
15
CKE
34
35CLK DCLK
152, 151, 149, 148
162 – 159, 157 – 154,
XCAS
144
XRAS
145
XWE
143
DCKE
142
141
ZDFL
ZDFR
TEST1
XRST
26
MUT 2D6SP ON1MUT LOAD
4
DATA
CLK
LATCH
INIT
63
65
115
9
SP ON
MUTE 2D
MUTE LOAD
MUTE CD
73
MUTE CD
XRST DVD
XRST CD
42 ZDFL
43 ZDFR
36 ISBTEST
RST DSD
25
RST DVD
31
RST CD
32
RST DP
PROGRAMMABLE
LOGIC DEVICE
IC904
DVDPDSW
CDPDSW
DVDPDSW
33
23
44LIM SW
CDPDSW
1TRKSW
XRST DP
DATA, CLK,
LATCH, INIT
DVDPDSW, CDPDSW
TRKSW
LIMSW
31
32
6
7
9
(Page 24)
(Page 23)
(Page 20)
(Page 20)
(Page 20)
2222
5-4. BLOCK DIAGRAM – AUDIO Section –
HEADPHONE
AMP
IC308 (1/2)
RV601
PHONE LEVEL
SCD-XB790
R-CH
J601
PHONES
27
(Page 22)
19
(Page 21)
28
(Page 22)
26
(Page 22)
SDATAL, SDATR,
SDATALS, SDATARS,
SDATAC, SDATALF,
64FS
MDAT,
LRCK,
BCLK
ZEROL,
ZEROR
256FS
SDATAL
SDATAR
SDATALS
SDATARS
SDATAC
SDATALF
64FS
MDAT
LRCK
BCLK
DSD1
38
DSD3
40
DSD2
39
DSD4
41
DSD5
42
DSD6
43
DSD7
44
DSD8
45
DBCK
37
PDATA1
46
PDATA2
47
PLRCK
51
PBCK
50
LOW-PASS FILTER
CLOCK BUFFER
IC304
65 3
12
DSD
INTERFACE
PCM
INTERFACE
DIGITAL FILTER,
D/A CONVERTER,
IC301
4
DSD
FILTER
PCM
FILTER
ZERO
DETECT
ZERO17ZERO2
6
ZEROL
ZEROR
ENHANCED
MULTI LEVEL
DELTA-SIGMA
MODULATOR
SYSTEM
CLOCK
PSCK34DSCK
33
D/A
CONVERTER
FUNCTION
CONTROL
MDIMCMS
2 4 3 36
DATA
CLK
LATCH
OUTPUT
AMP &
LOW-PASS
FILTER
XRST
INIT
VOUT3
VOUT1
VOUT4
VOUT2
VOUT5
VOUT6
VOUT7
VOUT8
MUTING
Q403
10
12
9
11
31
30
29
28
MIX AMP
IC315 (2/2)
R-CH
R-CH
R-CH
ANALOG
LOW-PASS
FILTER
IC305 (2/2)
ANALOG
LOW-PASS
FILTER
IC306 (2/2)
MUTING
Q401
MUTING
Q421
R-CH
MUTING
Q402
MUTING
Q422
R-CH
R-CH
R-CH
J301
J302
L
R
L
R
L
R
CENTER
ANALOG
2CH OUT
FRONT
SURR
ANALOG
5.1CH OUT
DATA, CLK, LATCH, INIT
32
(Page 22)
LMUTE, RMUTE
29
(Page 22)
MULTI
30
(Page 22)
X301
11.2896MHz
ANALOG
LOW-PASS
FILTER
IC307
MUTING
CONTROL
SWITCH
Q301
LMUTE
R-CH
MUTING
CONTROL
SWITCH
Q304
RMUTE
MUTING
Q441
MUTING
Q541
MUTING
CONTROL
SWITCH
Q303
MUTING
Q442
MUTING
Q542
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: SACD PLAY
: CD PLAY (ANALOG)
SUB WOOFER
2323
SCD-XB790
5-5. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
S810 – 813
60KEY0
CPU
IC901 (3/3)
S801 – 806
S830
61KEY1
62KEY2
REMOTE
82RM
57LED DRV
CONTROL
RECEIVER
IC802
LED
DRIVE
Q701, 702
FLUORESCENT INDICATOR TUBE DRIVER
IC801
ROTARY
ENCODER
D803
(MULTI-CHANNEL)
AMS
PUSH ENTER
+3.3V
Ll
VFL–33V
FLUORESCENT INDICATOR
TUBE DRIVER
(IC801)
F1
+3.3V
REGULATOR
IC302
DAC+5V
A+7V
A+UR
A–7V
A–UR
D922
D302D301
+5V
REGULATOR
IC903
+7V
REGULATOR
IC901
–7V
REGULATOR
IC902
–33V
REGULATOR
Q921
R954
RECT
D905, 906
RECT
D901, 902
RECT
D903, 904
D917 – 920
RECT
T902
POWER
TRANSFORMER
T901
POWER
TRANSFORMER
(Page 22)
31
XRST DP
53FLOUT
54FLCLK
56FLCS
C815,
R801
OSC
55 FL. DATA (DI)
54 FL. CLK (CL)
53 FLT (CE)
50 OSC0
51 OSC1
52
FLRST
61 – 64, 1 – 3045 – 3246, 47
31S35
3G – 16G1G, 2G S1 – S34
SEGMENT
DRIVE
Q803
GRID
DRIVE
Q801, 802
F1
F2
+2.5V
FL801
FLUORESCENT
INDICATOR
TUBE
F2
(COIL/MOTOR DRIVE (IC502))
+5V
(MOTOR DRIVE (IC512))
+2.5V
REGULATOR
IC702
D+3.3V
A+3.3V
M+12V
D+5V
A+5V
+5V
REGULATOR
IC504
+3.3V
REGULATOR
IC904
+5V
REGULATOR
IC906
+12V
REGULATOR
IC905
RECT
D909 – 912
RECT
D913 – 916
LINE
FILTER
L901
S991
POWER
(AC IN)
2424
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