Sony CDX-CA720X Service Manual ▷ View online
29
29
CDX-CA720X
3-15. SCHEMATIC DIAGRAM — KEY SECTION —
Note:
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
no mark : FM
(Page 27)
CN901
R901
R902
R903
R904
R905
R906
R907
R911
R912
R913
R914
R915
R916
R917
R918
R919
R991
R992
R993
R994
R994
R998
R997
R936
R937
R938
R958
R959
IC971
C971
C958
C959
C952
C953
LCD901
LSW911(1/2)
LSW913(1/2)
LSW915(1/2)
LSW916(1/2)
LSW918(1/2)
LSW919(1/2)
LSW902(1/2)
LSW904(1/2)
LSW905(1/2)
LSW907(1/2)
R999
C961
C962
R995
R996
R926
R927
R927
R928
IC901
RE901
R990
C956
S901
S903
S917
S914
S912
LSW902(2/2)
LSW904(2/2)
LSW905(2/2)
LSW919(2/2)
LSW911(2/2)
LSW907(2/2)
LSW913(2/2)
LSW915(2/2)
LSW916(2/2)
LSW918(2/2)
D911
D912
D913
D903
D972
D971
D908
D901
LED917
LED912
LED901
LED903
LED914
R981
R968
R965
R962
R967
R964
R961
LED932
LED933
LED934
LED942
LED943
LED944
R960
R963
R966
R930
R931
R932
R941
R942
R940
R921
R922
R950
R951
R984
R985
R986
R982
R983
R987
Q904
R920
30
30
CDX-CA720X
IC1 µPD63711GC-8EU
• IC BLOCK DIAGRAMS
IC2 BA5810FP-E2
76
75
AGCI
AGCO
74
RFI
73
C3T
72
ASY
71
EFM
70
AVDD
69
7E DAC3
68
7D DAC2
67
7C DAC1
66
7F DAC0
65
MD
64
SD
63
TD
62
FD
60
ATEST
59
TEST1
58
TEST0
57
DGND
56
TSTB
55
TSCK
54
TSI
53
TSO
52
PACK
51
DVDD
61
AGND
1
DGND
2
RFOK
3
RST
4
A0
5
STB
6
SCK
7
SO
8
SI
9
XTALEN
10
DVDD
11
DAVDD
12
ROUT
13
DAGND
REGC
16
LOUT
17
DAVDD
18
R+
19
R
–
20
L+
21
L
–
22
XVDD
23
XTAL
24
XTAL
25
XGND
15
14
DAGND
77
RFO
78
EQ2
79
EQ1
80
RF-
81
AGND
82
A
83
C
84
B
85
D
86
F
87
E
88
AVDD
89
REFOUT
90
FE-
91
FEO
92
TE-
93
TEO
94
TE2
95
AGND
TEC
96
PD 97
98
LD
PN 99
100
AVDD
50 C2D3
49 C2D2
48 C2D1
47 C1D2
46 C1D1
45 DGND
44 PLCK
43 MIRR/WFCK
42 RFCK
41 LOCK
40 DVDD
39 TSOI
38 C16M
37 DGND
36 TX
35 HOLD/WDCK
34 LRCK
33 LRCKIN
32 SCKO
31 SCKIN
30 DOUT
29
28
DIN
FLAG
27 EMPH
26 DVDD
EFM
COMPARATOR
EFM
EFM
DEFECT
FOK
A3T
MIRR
FEO
TEO
TEOFS
FEOFS
RF
AMP BLOCK
SWITCH
MICROCOMPUTER INTERFACE
SCF
OSC
FOCUS
REGISTER
TRACKING
REGISTER
OCTUPLED
OVERSAMPLING DIGITAL FILTER
NOISE SHAVER
OUTPUT BUFFER
NOISE SHAVER
OUTPUT BUFFER
DE-EMPHASIS CIRCUIT
D/A
INTERFACE
CIRCUIT
OUTPUT PROCESSOR
DIGITAL
AUDIO
INTERFACE
DIGITAL PLL
TIMING GENERATOR
EFM DEMODULATOR
ERROR
CORRECTION
PROCESSOR
MICROCOMPUTER INTERFACE
CD-TEXT DECODER
SUB-CODE PROCESSOR
16K
SRAM
D/A
AUTO GAIN
CONTROLLER
FD/TD/SD/MD
CONTROLLER
CONTROLLER
ADDER
SVDRAM
MULTIPLIER
SVCRAM
SVROM
ROM
DECODER
CLV
PROCESSOR
DEFECT
COMPARATOR
RFENV
MIRENV
A/D CONVERTER
MEMORY
PROCESSOR
COMPARATOR
1
FWD
+
–
+
–
+
–
2
REV
LOADING PRE
FWD REV
3
LDCONT
6
IN2
7
PREVCC
8
POWVCC
VOL–
VOL+
IN1
4
PS
+
–
LEVEL
SHIFT
+
–
+
–
LEVEL
SHIFT
LEVEL
SHIFT
+
–
POWER
SAVE
CH1-4
MUTE
X3
9
10
11
VO2–
12
VO2+
13
VO1–
14
VO1+
5
BIAS
OPIN4+
OPIN4–
OPIN3–
OPOUT3
MUTE
POWVCC
GND
OPIN3+
OPOUT4
VO3–
VO3+
VO4–
VO4+
7.5k
7.5k
16k
16k
7.5k
7.5k
16k
16k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
+
–
+
–
+
–
LEVEL
SHIFT
+
–
+
–
+
–
10k
10k
10k
10k
+
–
28
27
26
23
22
21
25
20
19
18
17
16
15
24
POWVCC34
(CH3,CH4)
PREVCC
(PRE.LOADING)
POWVCC12
(CH1.CH2)
31
CDX-CA720X
IC331 TDA7406
33
34
35
36
37
38
39
40
41
42
43
44
1 2 3 4 5
6 7 8
9
10
11
28 27
30 29
32 31
SOFT STEP
FADER
SOFT STEP
FADER
SOFT STEP
FADER
SUB
WOOFER
FILTER
MONO
FADER
MIXER
OUTPUT SELECTOR
HIGH PASS
SOFT STEP
VOLUME
7BAND
EQUALIZER
SOFT MUTE
BEEP
PAUSE
PLL
PIL, DET
LOUDNESS
SPECTRUM
ANALIZER
IN GAIN
+ AUTO
ZERO
MAIN SOURCE
SELECTOR
MIXING
SELECTOR
II
C-BUS
DIGITAL
CONTROL
DEMODULATOR
+STEREO ADJUST
+STEREO BLEND
PILOT
CANCELLATION
MULTI
PATH
DETECTOR
AM/FM
NOISE
BLANKER
PULSE
FORMER
SUPPLY
25kHz
LP
86kHz
LP
STD
IN GAIN
S & H
HIGH OUT
QUAL.
A/D
12
13
14
15
16
18
19
22
21
20
INPUT MULTIPLEXER
TAPE-RCH
AUX-RCH
PD-
AUX-LCH
PAUSE
PHONE
TIM
NAVI
AM/MPX2
AMIF
CMPX
TAPE-LCH
MD-LCH
MD-RCH
CD-LCH
CD-RCH
CREF
AC OUT.LCH
SWACOUT
ACOUT.RCH
ACIN-RCH
SWIN
ACINL
MIXINFL
MIXINRL
MIXINRR
MIXINFR
OUTFL
OUTRL
OUTFR
OUTRR
OUTSW
SAOUT
26 25
24
23
MPX1
LEVEL
(VSM)
(VSM)
MP IN
MP OUT
QUAL
17 EXA-ATT
GND
SDA
SCL
SACLK
VDD
CREF
32
CDX-CA720X
IC601 AN80T51
IC581 BA8270F-E2
PRE
DRIVE
PRE
DRIVE
ANP
OUT
OUT
ANT
OUT
OUT
PRE
DRIVE
PRE
DRIVE
ASO & PEAK
CURRENT PROTECTION
PRE
DRIVE
12
11
9
5
3
2
8
6
7
10
4
1
THERMAL
PROTECTION
REFERENCE
VOLTAGE
VCC
ANT+B
COM
8.7V
TU+B
(8.4V)
TU+B
(5.1V)
GND
AMP+B
BU+B
(5.8V)
TUN-ON
SW
10V
STB
10V-ON
SW
1
2
3
4
5
5
6
7
8
9
10
14
13
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS ON
RST
BATT
CLK
VREF
GND
VCC
RST
BUS ON
BUS ON
CLK IN
B/U-C
DATA IN
DATA OUT
DATA
I/O
I/O
+
–
+
–
1
24 LF OUT
2
3
LF IN
VREF
+
–
+
–
4
23 LR OUT
5
LR IN
VREF
+
–
+
–
7
DC R
20
19 VCC
18 VCC
6
DC L
VREF
+
–
+
–
–
8
RF IN
9
10
17
15 GND
VREF
+
–
–
+
–
–
14 RF OUT
VCC
VCC
SIGNAL AMP
SIGNAL AMP
LIFT AMP
VCC
VCC
LIFT AMP
SIGNAL AMP
SIGNAL AMP
VREF
11
RR IN
12
+
–
–
13 RR OUT
16
+
–
–
VREF
21
22 GND
IC407 LA2902V
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