Sony MDX-CA680 / MDX-CA680X Service Manual ▷ View online
MDX-CA680/CA680X
25
25
12
9
5
DATA
DADT
VOUTL
VOUTR
DADT,
BCK,
LRCK,
FS256
BCK,
LRCK,
FS256
6
BCK
BCK
LRCK
R-CH
R-CH
1
XTI
15
17
16
RSTB
DM1
DM0
LRCK
FS256
DEEMP
AM
MPX
DATA, CLOCK
S-METER
30
29
1
11
20
3
SEL
FD1L+
AM
12
AMIF
13
MPX
DATA
CLOCK
R-CH
A
B
F
CLK
CONTROL
SOFT
MUTE
TONE
CONTROL
LOUDNESS/
VOLUME
INPUT SELECT,
ELECTRICAL VOLUME, FM MPX
IC401
PILOT
CANCELATION
DIGITAL
CONTROL
L.P.F.
PLL
BUS
AUDIO IN
PJ401 (1/2)
AUDIO OUT
FRONT
AUDIO OUT
REAR
PJ401 (2/2)
IIC BUS
SDA
SCL
SM
PILOT
DET
+STEREO ADJUST
+STEREO BLEND
+STEREO BLEND
L.P.F.
S & H
HIGH-CUT
D/A
CONVERTER
MUTING
Q461
E
MD-ATT
MODE
CONTROL
ROTARY
ENCODER
RE901
D665
J561
REMOTE IN
U-COM +5V
S701
(NOSE DETECT)
OSC
LCD DRIVER
IC900
LCD901
LIQUID CRYSTAL DISPLAY
LCD-DATA
LCD-CLK
LCD-CE
C953, R957
LSW901 – 911,
LSW914 – 919,
LSW914 – 919,
S902 – 907
DIGITAL FILTER,
D/A CONVERTER
IC101
INPUT
INTERFACE
DIGITAL
FILTER
NOISE
SHAPER
D/A
COMVERTER
4
DEMODULATOR
21
45
47
18
LEVEL
14
70
MUTING
Q451
MUTING
Q441
MUTING
Q431
76
77
BATTERY OFF
MUTE DRIVER
Q479
BACK-UP B+
D479
D502
X501
18.432MHz
X502
32.768kHz
MD-RST
MD-RST,
DEEMP
DEEMP
I
H
INPUT
MULTIPLEXER
LOUDNESS
MUTE
MONO
FADER
MIXER
OUTLF
OUTLR
R-CH
OUTPUT
SELECTOR
AM/FM
NOISE
BLANKER
R-CH
FL-IN
FL+
1
CN601 (1/2)
POWER AMP
IC611
FRONT L+
FR-IN
RL-IN
RR-IN
AUX IN
16
15
11
14
12
22
4
FL–
9
FRONT L–
FR+
4
FRONT R+
FR–
12
FRONT R–
RL+
2
REAR L+
RL–
10
REAR L–
RR+
3
REAR R+
RR–
11
15
13
REAR R–
MUTE
TEST
TEL-ATT
STNBY
BEEP
AMPATT
AMPON
5
3
21
9
7
17
19
23
RCIN1
KEYIN0
KEYIN1
IIC SIO
IIC CKO
RE IN0
RE IN1
KEYACK
LCDSO
LCDCKO
LCDCE
OSCOUT
OSCIN
XOUT
XIN
ATT
TELATT
RCIN0
35
66
67
6
5
4
97
96
26
34
98
69
15
16
13
12
19
20
18
91
40
37
XKEYON
NOSESW
TEST IN
VOLATT
(VOLUME CONTROL)
OSC
78
74
1 – 64
SEG03 – SEG66
COM1 – COM4
65 – 68
MUTING
CONTROL
Q478
LEVEL SHIFT
Q651
D
KEY ACTIVE
SWITCH
Q664
SYSTEM CONTROLLER
IC501 (2/3)
: MD PLAY
: FM
: MW/LW
: BUS AUDIO IN
• SIGNAL PATH
L
R
L
R
• R-ch is omitted due to same as L-ch.
CN701
MAIN UNIT SIDE
9
1
CN901
FRONT PANEL SIDE
94
DOORSW
MPIN
15
C
EJKT
AMBER
GREEN
80
79
MULTIPATH
DETECTOR
R
L
LED900 – 903, 905, 906,
LED909, 910, 913, 914,
LSW901 – 911, 914 – 919
COLOR
SELECT
Q901, 902
(MDX-CA680)
4-3.
BLOCK DIAGRAM – MAIN Section –
(Page 23)
(Page 23)
(Page 24)
(Page 24)
(Page 24)
(Page 24)
(Page 23)
(Page 23)
MDX-CA680/CA680X
26
26
4-4.
BLOCK DIAGRAM – BUS CONTROL/POWER SUPPLY Section –
U-COM +5V
RESET SIGNAL
GENERATOR
IC602
REMOTE CONTROL
RECEIVER
IC971
BATTERY
DETECT
Q701
ACCESSORY CHECK
Q631
6
8
4
CLK
ANT+B
TU8.7V
AMP+B
REGULATOR
IC601
COM8V
TU5.6V
5.6VON SW
8.7VON SW
STB
CLK IN
DATA OUT
DATA I/O
2
RST
RESET
SWITCH
BUS ON
SWITCH
13
11
1
BUS
ON
ON
BUS
IN
12
9
DATA IN
SONY BUS INTERFACE
IC505
SYSTEM CONTROLLER
IC501 (3/3)
MD MECHANISM CONTROLLER
IC501 (2/2)
BUS ON SWITCH
Q560
BATT
BACK-UP B+
BUS ON
DATA
CLK
RESET
7
6
5
4
2
16
+B
ANT-R
AMP-R
6
5
CNJ600
BUS CONTROL IN
(FOR SONY BUS)
CN601 (2/2)
FU601
COM +8V
(AUDIO CIRCUIT B+)
RST
3
BATT
BATTERY
SWITCH
10
B/U-C
UNISI
50 UNISO
UNICKIO
MDMON 10
28
25
44 UNICKO
43 UNISI
42 UNISO
24
29 SIRCS
33
65
MD-ON
D301
TH600
D552
D701
LED810,
LSW810
LSW810
LED810
(DISC SLOT ILLUMINATION)
VCC
TUNER +5.6V
TUNER +8.7V
VCC
7
7
ACC
+B SWITCH
Q665
+6V
REGULATOR
Q331
+3.3V
REGULATOR
IC401, Q401
+5V
REGULATOR
Q336
B+ SWITCH
Q402, 403
+3.3V
D612
D613
BU B+
2
3
4
9
BU+B
5
10
11
8
6
TUNON
ILLON
38
93
49
PW ON
RESET
SYSRST
BU-IN
BUS-ON
RESET
LINKOFF
BUIN
BUSON
ACCIN
92
DOORIND
48
61
60
30
49
46
DRIVER +5V
MOTOR/COIL DRIVER
(IC303) B+
LOAD +6V
LOADING MOTOR
DRIVER (IC305) B+
LED DRIVE
Q663
LCD B+
(FRONT PANEL)
REGULATOR
CONTROL
Q333
BACK-UP B+
POWER AMP
(IC611) B+
S702
RESET
D1
D610
U-COM +5V
D621
LSW810
Z
D558
50
REGULATOR
CONTROL
Q335
REGULATOR
CONTROL
Q662
27
MDX-CA680/CA680X
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
z
: Through hole.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
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.
4-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• 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.
E
: MD PLAY
F
: FM
f
: AM (MW/LW)
L
: BUS AUDIO IN
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
28
MDX-CA680/CA680X
• Circuit Boards Location
SUB board
SENSOR board
SERVO board
MAIN board
KEY board
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