Read Sony CDX-CA720X Service Manual online
16
16
CDX-CA720X
3-3. BLOCK DIAGRAM — TUNER SECTION —
(Page 15)
J10
(ANTENNA)
2
10
1
ANTFM
MPX
CDL
8
AM DET
14
S-METER
12
I2C SDA
13
I2C SCL
17
E2PROM SDA
18
E2PROM SCL
ANTAM
TUNER UNIT
TU10
2
45
47
70
13
14
19
20
17
9
12
43
4
28
SYSTEM CONTROL
IC501 (2/3)
ELECTRONIC VOLUME
IC331
AUX-LCH
OUT FL
35
ACIN RCH
38
ACOUT LCH
36
ACOUT RCH
27
OUT RL
26
OUT FR
25
OUT RR
35
BEEP
ATT
67
69
AMP ON
66
AMP ATT
40
TEL ATT
38
ACC IN
MD LCH
MPX1
R-CH
AM/MPX2
LEVEL
MPIN
SDA
SCL
EXA-ATT
VOL ATT
VSM
I2C SIO
I2C CKO
9 DSTSEL/
FUNCSEL
E2P SIO
E2P CKO
AUDIO OUT REAR
CD
SECTION
A
MUTE
Q175
MUTE
Q185
MUTE
Q171
MUTE
Q181
22 MUTE
4 STBY
16 AUX
11
12
5
3
9
7
POWER AMP
IC751
1
-1
-2
-5
-6
-3
-4
9
2
10
CNP781
R-CH
PJ151
FL+
FL-
RL+
RL-
4
12
FR+
FR-
3
11
RR+
RR-
16 +B (BATT)
13 ATT
5 AMP R
6
8
19
ANT R
GND
R-CH
BATT
F901
10A
TEL
ATT
ATT
Q585
MUTE
Q625
7 ACC
15 TEST
49
50
TUN ON
37
TEST IN
ACC
DETECT
Q571
PW ON
ILL ON 93
24
SYSRST
25
BUSON
43
UNISI
44
UNICKO
42
UNISO
28
BU IN
87
86
BATT DET
Q581,D584,585
BATT
17
18
L
R
AUDIO OUT FRONT
R-CH
L
R
BUS AUDIO IN
R-CH
L
R
• Signal path
: FM
: AM
: CD
• R-ch is omitted due to same as L-ch.
CDR
R-CH
42 MD RCH
R-CH
BUS INTERFACE
IC581
13 RST
12 BUSON
8 DATA OUT
11 CLK IN
9 DATA IN
10 B/U-C
6
DATA I/O
4
CLK
2
RST
3
BATT
8
7
5
6
4
2
3
1
BATT
CNJ581
BUS
CONTROL IN
L-CH AMP
IC332
1
BUSON
DELAY
BATT
D621
POWER SUPPLY
IC601
2 TUN-ON SW
BU+5.8V
COM+8V
TU+5V
TU+5V
TU+8.5V
BU+B(5.8V)
COM8.7V
TU+B(5.1V)
TU+B(8.4V)
BATT
4 STB
3
10V ON
SW
SW
ILL+5V
6
AMP+B
8
ANT+B
11
10
9
5
7
VCC
BATT
D612
D613
D650
D625
D651
POWER ON
SWITCH
Q613
10V ON
SWITCH
SWITCH
Q650
ILL B+
REG
Q601
ILL ON
SWITCH
Q603
LINE MUTE
CONTROL
Q621,622
8
14
11
13
5
7
3
1
FL
RL
L-CH AMP
IC409
AF AMP
IC407
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