5-5. Base Unit Section (DVBU-6) ......................................... 56
6.ELECTRICAL PARTS LIST ............................... 57
2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objecti ve lens.
CLEANING OF OPTICAL PICK-UP LENS
In cleaning the lens of optical pick-up, use the air blower.
Never use a cotton swab for cleaning the lens of optical pick-up,
which otherwise causes a trouble.
SCD-XB770
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURNS OFF
tray
A
cam (66)
tapering driver
1
Insert a tapering driver (3 mm in diameter)
in the hole at the bottom of the unit,
turn the cam (66) fully in the direction of arrow A.
3
SCD-XB770
DISPLAY BOARD SERVICE POSITION
In checking the DISPLAY board, prepare jig (extension cable J-8000-024-A : 1.00 mm Pitch, 12 cores, Length 300 mm.)
MAIN board
CN706
DISPLAY board
CN801
Note: Follow the assembly procedure in the numerical order given.
INSTALLATION OF THE TRANS BOARD
Note : Solder the TRANS board after installing power transformers (T901, T902)
to the chassis.
(To prevent the TRANS board from being cracked.)
3
four screws
(PTTWH3
×
6)
4
Connect jig (extension cable J-8000-024-A)
to the DISPLAY board (CN801) and
MAIN board (CN706).
5
Solder seventeen portions.
four screws
3
(PTTWH3
×
6)
2
power transformer
(T902)
1
power transformer
(T901)
4
SECTION 2
Front Panel Parts Descriptions
GENERAL
SCD-XB770
This section is extracted from
instruction manual.
POWER
PHONES
PHONE LEVEL
MIN MAX
TIME/TEXT SACD/CD
MENU MULTI/2CH
1 POWER switch (14)
Press to turn on the player.
2 TIME/TEXT button (15)
Each time you press the button, the playing time of the
track, the total remaining time on the disc, or TEXT
information appears in the display.
3 SACD/CD button (12)
Each time you press the button, ”SACD“ or ”CD“
appears in the display. Select the type of CD you want
to play.
4 Disc tray (14)
Press A OPEN/CLOSE to open/close the disc tray.
Multi-channel indicator
5
Turns on when you turn on the player, or when the
Multi-channel Super Audio CD is loaded and select
the Multi-channel playback area by pressing MULTI/
2CH.
6 A OPEN/CLOSE button (14)
Press to open the disc tray
.
7 H button (14)
Press to start play.
8 X button (14)
Press to pause play.
9 x button (14)
Press to stop play.
OPEN CLOSE
AMS
PUSH ENTER
0 l AMS L dial (AMS: Automatic Music Sensor)
(13)
When you turn the l AMS L dial
counterclockwise by one click, you go back to the
preceding track; when you turn the l AMS L
dial clockwise by one click, you go to the succeeding
track.
qa m/M buttons (18)
Press to locate a portion you want to play within a
track.
qs Display window (15)
Shows various information.
qd MULTI/2CH button (12)
Press to select the playback area when the 2 channel +
Multi-channel Super Audio CD (page 13) is loaded.
qf MENU (13)
Press to enter the menu.
qg PHONES LEVEL
Adjust the headphones volume.
qh PHONES
Connect the headphones.
During playback of a Multi-channel Super Audio CD,
the same signal that is output from the ANALOG
5.1CH FRONT L/R jacks is output from the PHONES
jack.
Rear Panel Parts Descriptions
ANALOG
2CH OUT5.1CH OUTOUT
FRONTCOAXIAL OPTICALSURR CENTER
L
R
1 ANALOG 2CH OUT L/R jacks (6)
Connect to an audio component (stereo/2 channel)
using the audio connecting cord.
2 ANALOG 5.1CH OUT jacks (5)
Connect to an amplifier equipped with the 5.1CH
input jacks (Multi-channel amplifier, AV amplifier,
etc.) using the audio connecting cords.
3 DIGITAL (CD) OUT COAXIAL connector (7)
Connect to an audio component using the coaxial
digital cable.
4 DIGITAL (CD) OUT OPTICAL connector (7)
Connect to an audio component using an optical
digital cable.
DIGITAL(CD)
L
SUB
R
WOOFER
Note
Only the audio signals of the CD can be output from the
DIGITAL (CD) OUT connectors shown in 3 and 4. Those of the
Super Audio CD cannot be output through DIGITAL (CD) OUT.
5
SCD-XB770
Remote Parts Descriptions
1 CONTINUE button (20)
Press to resume normal play from Shuffle Play or
Programme Play.
SHUFFLE button (20)
Press to select Shuffle Play.
PROGRAM button (21)
Press to select Programme Play.
2 DISPLAY MODE button (16)
Press to turn off the information.
3 TIME/TEXT button (15)
Each time you press the button, the playing time of the
track, the total remaining time on the disc, or TEXT
information appears in the display.
4 Number buttons (18)
Press to enter the track numbers.
5
i
10 button (18)
Press to locate a track numbered over 10.
6 REPEAT button (19)
Press repeatedly to play all tracks or only one track on
the disc.
7 AyB button (20)
Press to select Repeat A-B Play.
8 H button (14)
Press to start play.
X button (14)
Press to pause play .
x button (14)
Press to stop play.
9 AMS ./> (AMS: Automatic Music Sensor)
buttons (18)
Press to locate a specific track.
0 m/M buttons (18)
Press to locate a portion you want to play within a
track.
qa INDEX >/. buttons (18)
Press to locate a specific point marked with an index
signal when you play a disc that has index signals.
qs SACD/CD button (12)
Each time you press the button, ”SACD“ or ”CD“
appears in the display. Select the type of CD you want
to play.
qd MULTI/2CH button (12)
Press to select the playback ar ea when the 2 channel +
Multi-channel Super Audio CD (page 13) is loaded.
qf ENTER button (24)
Press to decide the selection.
qg CLEAR button (21)
Press to delete a programmed track number.
qh LEVEL ADJ button (24)
Press to adjust the output level balance for the Multichannel management function (page 22).
CHECK button (21)
qj
Press to check the programmed order.
PLAY MODE
CONTINUE SHUFFLE
DISPLAY/
MODE
TIME/TEXT
PROGRAM
SACD/CD
MULTI/2CH
123
456
78
>10ENTER
REPEAT
9
10/0
CLEAR
CHECK
LEVEL
BA
ADJ
AMS
INDEX
11
6
Compatible Disc Types
SCD-XB770
You can play the following discs with this player.
Depending on the type of disc to be played, select the
appropriate indicator by pressing SACD/CD or MULTI/
2CH (pages 14).
Classification by the layer configuration
Super Audio CD (single layer disc)
This disc consists of a single HD (high density) layer.
When you play this disc, the player is set to the Super
Audio CD playback mode automatically.
HD (Super Audio CD)
layer
Super Audio CD (dual layer disc)
This disc consists of dual HD layers and is capable of
extended play over long periods.
When you play this disc, the player is set to the Super
Audio CD playback mode automatically.
Also, as the dual layer disc consists of dual HD layers on
one side only, it is not necessary to turn the disc over.
HD (Super Audio CD)
layer
HD (Super Audio CD)
layer
Conventional CD
This disc is the standard format.
When you play this disc, the player is set to the
Conventional CD playback mode automatically.
CD layer
Super Audio CD + CD (Hybrid disc)
This disc consists of an HD layer and a CD layer. Press
SACD/CD to select the layer you want to listen to. Also,
as the dual layers are on one side, it is not necessary to
turn the disc over.You can play the CD layer using a
conventional CD player.
CD layer
HD (Super Audio CD)
layer
Classification by the channel
configuration of the Super Audio CD
2 channel Super Audio CD
This disc consists of the 2 channel playback area.
When you play this disc, the player is set to the 2 channel
playback mode automatically.
2 channel playback area
Multi-channel Super Audio CD
This disc consists of the multi-channel playback area.
When you play this disc, the player is set to the multichannel playback mode automatically.
Multi-channel playback
area
2 channel + Multi-channel Super Audio CD
This disc consists of the 2 channel playback area and the
multi-channel playback area.
Press MULTI/2CH to select the playback area you want to
listen to.
2 channel playback area
Multi-channel playback
area
You can select the default playback area (2 channel
playback or multi-channel playback area).
1
During stop mode, press MENU.
2
Turn l AMS L until “M/2CH SELECT” appears
in the display .
3
Press l AMS L.
The current playback area appears.
4
Turnl AMS L to select desired playback area,
then press l AMS L.
Incompatible Discs
This player cannot play the following discs. If you try to
play them, the error message “TOC Error” or “NO DISC”
will appear or there will be no sound.
• CD-ROM
• DVD, etc.
7
SCD-XB770
• This set can be disassembled in the order shown below.
3-1.DISASSEMBLY FLOW
SET
3-2. COVER
(Page 9)
SECTION 3
DISASSEMBLY
3-3. FRONT PANEL SECTION
(Page 9)
3-4. AUDIO BOARD,
MAIN BOARD
(Page 10)
3-5. MECHANISM DECK
(CDM66B-DVBU6)
(Page 10)
3-6. BASE UNIT
(DVBU-6)
(Page 11)
8
Note: Follow the disassembly procedure in the numerical order given.
)
3-2.COVER
2
two flat head screws (TP)
2
two flat head screws (TP)
4
two washers
(DIA. 3.2)
5
two washers (P)
3
cover
SCD-XB770
1
two screws
2
two flat head screws (TP)
4
two washers (DIA. 3.2
3-3.FRONT PANEL SECTION
4
7
front panel section
1
Pull out the tray.
(Refer to page 3, HOW TO
OPEN THE TRA Y WHEN
POWER SWITCH TURNS
OFF.)
2
loading panel assy
connector
(CN992)
6
two claws
6
two claws
4
two connector
(CN305, 905)
3
wire (flat type)
(12 core)
(CN706)
5
seven screws
(BV/RING)
9
SCD-XB770
)
3-4.AUDIO BOARD, MAIN BOARD
8
8
wire (flat type)
(30 core) (CN708)
9
connector
(CN703)
0
screw
(BVTT3
×
6)
qa
wiring stopper
qs
MAIN board
9
two connectors
(CN704, 707)
1
two wires
(flat type) (19 core)
(CN302, 303)
wire (flat type)
(12 core) (CN706)
2
four connectors
(CN301, 304, 305, 306)
5
two washers (DIA. 3.6)
0
three screws
(BVTT3
6
PC board holder
7
AUDIO board
4
screw
(BVTT3
×
6)
3
×
6)
five screws
(BVT/RING)
3-5.MECHANISM DECK (CDM66B-DVBU6)
1
Pull out the tray.
(Refer to page 3, HOW TO OPEN THE TRAY
WHEN POWER SWITCH TURNS OFF.)
2
loading panel assy
3
Push
the tray.
6
three screws
(BVTT3
×
8)
7
mechanism deck
(CDM66B-DVBU6)
4
wire (flat type) (30 core
(CN708)
10
5
connector (CN151)
3-6.BASE UNIT (DVBU-6)
– BOTTOM VIEW –
cam (66)
base unit (DVBU-6)
SCD-XB770
2
1
screw (DIA. 12), floating
3
base unit (DVBU-6)
11
SCD-XB770
MEMO
12
SECTION 4
d
DIAGRAMS
SCD-XB770
4-1.NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side)the pattern face are indicated.
Parts face side:Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Main board is multi-layer printed board.
However, the patterns of inter mediate-layer have not been
included in diagram.
• Indication of transistor
C
Q
B
E
These are omitted.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
f
•
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
• V oltages are taken with a VOM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
with mark 0 are critical for safety.
Replace only with part number specified.
under no-signal conditions.
no mark : SACD PLAY
() : CD PLAY
Voltage var iations may be noted due to normal production tolerances.
Voltage var iations may be noted due to normal production tolerances.
J: SACD PLAY
c : CD PLAY (ANALOG OUT)
I : CD PLAY (DIGITAL OUT)
: Impossible to measure
∗
4
W or less unless otherwise
• Circuit Boards Location
AC SW board
HP board
KEY board
DISPLAY board
TRANS board
POWER board
LOADING board
RF board
AUDIO boar
MAIN board
1313
SCD-XB770
4-2.SCHEMATIC DIAGRAM – RF Board – • See page 30 for Waveforms. • See page 33 for IC Block Diagram.
C041
C032
0.1
SACD/CD RF AMP,
FOCUS/TRACKING
C025
ERROR AMP
IC001
CXD1881R
0.1
R016
R018
C039
0.1
N
O
D
L
1k
1k
0.01
C040
0.01
R
IR
M
DTC144EKA-
B+ SWITCH
D
L
_
D
C
C036
0.1
1000p
C045
330p
C044
C042
C043
0.033
0.033
D
O
M
V
Q005
T146
D002
R003
1SS352
33k
-TPH3
(SPINDLE)
(SLED)
(LIMIT)
C026
0.01
C017C021
C011
C010
C009
R097
33k
D
L
_
D
V
D
22p22p
22p
C018
C013
5600p
2200p
2200p
2200p
C008
2200p
C016
180p
33332200p
R092
0
D001
1SS352
-TPH3
22p
C020
C023R015R093C001
100
6.3V
C015
10
C030
22
10V
R017
470
CN003
CN002
25P
6P
CD_LD
CD_LDGND
CD_VR
CD_PD
VMOD
DVD_LD
DVD_VR
DVD_LDGND
DVD_PD
TRK+
TRK-
FCS-
FCS+
A
D
E
C
GND
H
VC
RF
F
G
VCC
B
M3
M2
S1
SP+
SP-
SD+
SD-
LIM_SW
D3V
LIM_SW
CD_LD
R001
0
CD_PD
VMOD
RFP
DVD_LD
R002
100
DVD_PD
TD-
TD+
FD-
FD+
C004
0.1
C006
0.1
SP+
SP-
SD+
SD-
D3V
C012
5600p
A
B
C
D
A
D
E
C
H
RFP
F
G
B
CD_F
CD_E
DVD_PD
CD_PD
Q001
2SB1121-ST-TD
AUTOMATIC
POWER CONTROL
(FOR SACD)
JL081
Q002
2SB1121-ST-TD
B+ SWITCH
D
O
M
V
C031
0.1
C027
0.1
R091
0
C007 C024
R098C022
10 0.01
33k1000p
CN005
30P
MIRR
VMOD
R022
12k
F
E
F
E
N
I
T
F
R
E
R
_
_
/P
A
SD
FE
LK
T
C
A
D
R025
0
0
R024
0
R023
C048
0.047
R035
JL006
JL003
JL002
JL001
C047
0.1
C046
0.1
R021
10M
C038
C002
100
2200p
6.3V
R094R019
3333
Q003
2SB1121-ST-TD
AUTOMATIC
POWER CONTROL
R090
(FOR CD)
0
C037
C029
10
1000p
0
47k
R029
R046 R036
SUMMING AMP,
PI ERROR AMP,
AVC BUFFER
IC004
C095
0.1
100 10k
C060
0.1
PI
C051
0.1
C003
0.1
NJM3403AV(TE2)
C055
C052
47
0.1
6.3
C028
47
6.3
R020
470
C090
1
C050
22
10V
R044
8.2k
C094
22
10V
C064
0.1
R066
R065
10k
R084
10k
R087
10k
10k
R086
10k
R085
10k
10k
E
R082
F
E
_
_
D
F
C
G
CD
JL053
FE/PI
PI
JL052
TE
FE
SDEN
DATA_RF
CLK_RF
LDON
FD-
FD+
TD-
TD+
SD-
SD+
SP-
SP+
D3V
JL051
LIM_SW
10k
R083
H
AGND
RFAC
AGND
AVC
AVC
MIRR
VMOD
DFCT
FE/PI
PI
TE
FE
A5V
A5V
SDEN
DATA_RF
CLK_RF
LDON
A3V
FD-
FD+
TD-
TD+
SD-
SD+
SP-
SP+
D3V
SA/CD
LIM_SW
(Page 18)
1414
4-3.PRINTED WIRING BOARDS – RF/LOADING Boards – • See page 13 for Circuit Boards Location.
12345678
M3
M
M2
(SLED)S1(LIMIT)
M
OPTICAL PICK-UP
BLOCK
KHM-230AAA
(SPINDLE)
RF BOARD
(COMPONENT SIDE)
A
SCD-XB770
B
C
D
A
MAIN
BOARD
CN708
(Page 16)
RF BOARD
(CONDUCTOR SIDE)
3217
33
48
4964
E
16
1
E
E
E
1-680-791-
11
(11)
LOADING BOARD
S152
LOADING
IN
11
1-645-721-
(21)
K
MAIN
BOARD
CN703
(Page 16)
CN151
5
1
S151
LOADING
IN
M
M151
(LOADING)
11
1-680-791-
(11)
• Semiconductor
Location
Ref. No. Location
D001D-4
D002D-4
IC001B-3
IC004D-4
Q001B-4
Q002B-5
Q003B-4
Q005B-5
1515
SCD-XB770
4-4.PRINTED WIRING BOARD – MAIN Board (Component Side) – • See page 13 for Circuit Boards Location.