Sony MDS-JB920 Service Manual ▷ View online
MDS-JB920
– 43 –
– 44 –
6-3.
BLOCK DIAGRAM – MAIN Section –
05
X200
45MHz
LED DRIVE
Q756
ROTARY
ENCODER
FL DRIVE
Q781, 782
D756
STANDBY
D758
MEGA
CONTROL
LED DRIVE
Q758
72 74
A/D CONVERTER
IC100
BUFFER
IC101
11
15
16
10
ADDT
ADDT
DADT,
BCK,
LRCK
BCK,
LRCK
INLP
VREF
VREFL
R-CH
R-CH
R-CH
BCK1
MCKI
LRCK1
DPD
12
AOUTL–
13
AOUTL+
12
INLM
INRP
INRM
16
AINL+
AINL–
(Page 42)
(Page 42)
(Page 42)
A
DIGITAL
IN
IN
B
DIGITAL
OUT
OUT
C
LINE AMP
IC103
MUTING
Q200 – 203
MUTING
CONTROL SWITCH
Q702
BUFFER
IC241
SIRCS
BUFFER
Q800
REMOTE CONTROL
RECEIVER
IC761
OSC
RV760-1
ANALOG
REC LEVEL
RV760-3
DIGITAL
REC LEVEL
J100
RV790
PHONE
LEVEL
R-CH
R-CH
R-CH
D704
D703
LINE IN
(ANALOG)
LINE OUT
(ANALOG)
J790
PHONES
L
R
L
R
87
6
DALATCH
DA
P3
P1
61 62
COM24
COM23
67
1
3
88
DVOL1
DVOL0
22 21
MUTE
83
DARST
CP
CS
+5V
REGULATOR
IC205
+7V
REGULATOR
IC703
–7V
REGULATOR
IC702
–32V
REGULATOR
IC701
+5V
REGULATOR
IC705
+3.3V
REGULATOR
IC192
+5V
REGULATOR
IC102
–32V
(FL DRIVER (IC771) B–)
AC IN
AC
(TO FL781)
T701
POWER
TRANSFORMER
LOADING MOTOR
DRIVER (IC400) B+
+3.3V
MD MECHANISM DECK SECTION,
DIGITAL IN/OUT CIRCUIT B+
+5V
MD MECHANISM DECK
SECTION B+
BACK UP +3.3V
BT701
LITHIUM
BATTERY
RECT
D706
D706
RECT
D720, 721
D701
D710
D709
D700
+7V
VCC
AUDIO
CIRCUIT
–7V
RECT
D711, 712
RECT
D715 – 718
POWER DOWN
DETECT
IC704
79, 80, 1
39 – 60
3 – 37
AD1 – AD3
97, 95 – 93
KEY0 – KEY3
COM01 – COM22
SEG01 – SEG35
SEG01 – SEG35
SEG36 – SEG38
G23
G24
G01 – G22
FLUORESCENT
INDICATOR TUBE
FL781
FL/LED DRIVER
IC771
OUTPUT
INTERFACE
DECIMATION/
LOW-CUT
FILTER
DECIMATION/
LOW-CUT
FILTER
PLM & BUFFER
∆Σ
MODULATOR
∆Σ
MODULATOR
+
–
–
+
–
–
+
–
–
+
–
–
MODE
CONTROL
CLOCK
BUFFER
CLOCK
GENERATOR
1024FS
CLOCK
BUFFER
TIMING
CONTROL
+5V
A/D CONVERTER (IC100) B+
(FOR ANALOG SECTION)
+5V
A/D, D/A CONVERTER (IC100, 200) B+
(FOR DIGITAL SECTION)
SYS +3.3V
+5V
D/A CONVERTER (IC200) B+
(FOR ANALOG SECTION)
82
A1OUT
7
A1IN
D/A CONVERTER
IC200
CURRENT PULSE
IC204
2
6
29
4
41
47
43
DATA
IN1+
DADT
BCK
LRCK
BCK
LRCK
L1+
R-CH
BCK
ATT
XIN
48
64FSI
28
40
XOUT
64FSO
35
FLDATA
37
FLCLK
34
70 69 68
FLCS
2
JOG0
GND
SW
1
JOG1
100
MONO/ST
92
SOURCE
91
TIMER
12
19
P.DOWN
84
STB
≠ AMS ±
PUSH ENTER
S713
S701 – 706, 711, 712,
S714, 716, 722 – 726,
S714, 716, 722 – 726,
S731 – 734
A
B
7
SHIFT
SWDT
SCLK
8
LATCH
LRCK
RMC
65 OSCI
C772, R772
66 OSCO
256FSO
54
128FSO
MCLKI
LVCKO
3
OVFLAG
52
25
IN1–
MIX AMP
IC243 (1/2)
LOW-PASS
FILTER
IC243 (2/2)
HEADPHONE
AMP
IC790
24
IN2+
27
IN2–
28
21
I01+
1
I02–
2
I02+
5
I01–
4
L1–
20
L2+
24
L2–
25
R1+
36
R1–
37
R2+
33
R2–
INIT
32
5
(Page 42)
D
SWDT, SCLK
(Page 42)
F
512FS
(Page 42)
E
S/P
ATT & IIR
FIR
OVERFLOW
DETECTOR
ATT & L.I.P.
NOISE
SHAPER &
REGISTER
SWITCHING
CIRCUIT
CONTROL
CIRCUIT
COAX/XOPT
OPT2/XOPT1
86 85
3
ANA5
4
SYS3.3
5
BACK
6
STBY
2
S.RESET
12
J800
S-LINK
CONTROL A1
+3.3V
S746
REC MODE
S741
INPUT
S751
TIMER
1
2
56
55
19
18
•
SIGNAL PATH
: PLAY (ANALOG OUT)
: PLAY (DIGITAL OUT)
: PLAY (DIGITAL OUT)
: REC (ANALOG IN)
: REC (DIGITAL IN)
OUT
OPT1
WAVE
SHAPER
IC301
WAVE
SHAPER
IC305
OPTICAL
RECEIVER
IC303
OPTICAL
RECEIVER
IC302
OPTICAL
TRANSCEIVER
IC304
DIGITAL
OPTICAL IN 1
DIGITAL
OPTICAL IN2
DIGITAL
OPTICAL OUT
OPT2
COAX
COAX
SEL0
SEL1
SEL0
SEL1
SEL0
SEL1
DIGITAL INPUT SELECTOR
IC300
DIGITAL
COAXIAL IN
J300
7
6
5
4
3
14
2
DIGITAL
COAXIAL OUT
J301
T301
RESET
6
5
SDA
SCL
EEPROM
IC171
XIN
SDA
SCL
XOUT
X800
7MHz
15
13
XT-IN
XT-OUT
X801
32.768kHz
10
11
61
66
4
5
STEREO
MONO
REC
OFF
PLAY
ANALOG
COAX (DIGITAL)
OPT1 (DIGITAL)
OPT2 (DIGITAL)
SYSTEM CONTROLLER
IC800 (2/2)
REGULATOR
IC700
S.RST
– 45 –
– 46 –
• Circuit Boards Location
AC board
SW board
BAT board
MAIN board
VOL board
DISP board
BD board
PSW board
HP board
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
•
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
®
: Through hole.
• b
: Pattern from the side which enables seeing.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages and waveforms are dc with respect to ground in
playback mode.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
E
: PB
j
: REC
p
: PB (Digital out)
l
: REC (Digital in)
• Abbreviation
CND : Canadian model.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
• Indication of transistor.
B
These are omitted.
C
E
Q
C
B
These are omitted.
E
Q
6-4.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
• Abbreviation
CND
: Canadian model.
– 47 –
– 48 –
6-5.
PRINTED WIRING BOARDS – BD Section –
•
See page 45 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
D101
A-1
D181
D-3
D183
D-3
IC103
B-1
IC171
D-1
Q102
B-1
Q103
B-1
Q104
B-1
• Semiconductor
Location
Ref. No.
Location
IC101
A-3
IC121
C-3
IC123
D-2
IC124
C-3
IC152
B-1
IC181
C-1
IC192
D-1
Q101
B-3
Q162
B-3
Q163
B-3
Q181
C-1
Q182
C-2
MAIN BOARD
CN400
(Page 64)
MAIN BOARD
CN402
(Page 63)
MDS-JB920
– 49 –
– 50 –
6-6.
SCHEMATIC DIAGRAM – BD Section (1/2) –
•
See page 53 for Waveforms.
•
See page 70 and 71 for IC Block Diagrams.
(Page 51)
(Page 51)
(Page 51)
(Page 52)
(Page 52)
(Page 52)
(Page 52)
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