Read Sony CDX-R450 / CDX-R550 Service Manual online
18
18
CDX-R450/R550
CDX-R450/R550
3-2. BLOCK DIAGRAM — MAIN SECTION —
1 ANT
7 SE2L
ELECTRONIC VOLUME
IC401
J1
(ANTENNA)
TU1
(TUNER UNIT)
I2C-BUS CONTROLLED POWER AMP
/MULTIPLE VOLTAGE REGULATOR
IC300
SYSTEM CONTROL
IC501 (2/3)
CN300
8 SE2R
26 SA OUT
25 SA IN
R-CH (FRONT)
R-CH (REAR)
R-CH (REAR)
BATT
9 SE1L
11 DIFFL
13 DIFFR
10 SE1R
R-CH
4
3
3
10
VCC
11
VDD5V
15
E2P VDD
13
TU-SCL
14
TU-SDA
6
S-METER
7
TUN MUTE
16
E2P SCL
17
E2P SDA
39 VSM
AUDIO+8.3V
TU+5V
BU+3.3V
BU+3.3V
12 TU ATT
45 SA CKO
44 SA IN
44 SA IN
25 EEP CKO
24 EEP SIO
24 EEP SIO
8
MUTE CON
5
QUALITY
RDS OUT
53 TU ATT IN
38
38
13
QUALITY
NS MASK
DAVN
RDS ON
L-CH
R-CH
CD-L
R-CH
16
28
28
OUT LR2
OUT RR2
R-CH
L
R
5
3
3
OUT FL+
OUT FL–
9
7
7
OUT RL+
OUT RL–
29
27
27
AMP-REM
R-CH
ANT-REM
BATT
30
37
37
AUDIO+B
B.UP+B
31
33
33
SERVO3.3V
MECHA6V
34
PANEL+B
TU+5V
BATT
17
18
18
OUT RF
OUT RR1
21
MUTE
2 SDA
AUDIO+8.3V
BU+5V
SERVO+3.3V
MECHA+6V
MECHA+6V
PANEL+B
4 SCL
SDA
SCL
16 BEEP
22 STB
25 DIAG
AUDIO+8.3V
35 VP
20 VP1
6 VP2
15
7
10
12
11
16
1
9
2
4
3
5
6
22
23
23
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
33
I2C CKO
34
I2C SIO
9
VOL ATT
86
ATT
5
BEEP
26
AMP STB
8
DIAG
75
ILLUIN
73
30
ATT
56
TEST IN
12 IN FL
FL+
FL–
RL+
RL–
FR+
FR–
RR+
RR–
AMP-REM
ANT-REM
ACC
TEST
ILL
20
OUT LF
11 IN RL
19
OUT LR1
MUTE
Q440
MUTE
Q430
REAR
AUDIO OUT
J451 (2/3)
MUTE DRIVE
Q491,492
NS MASK
CONTROL
Q1
RDS DECODER
IC50
R450
72
74
ACC IN
TEL ATT
ILLUMINATION CHECK
Q703
ACCESSORY CHECK
Q702
+5V REG
Q3
BU+3.3V
BU+5V
+3.3V
REG
IC502
MUTE
Q470
13
TEL-MUTE
D491
D493
F901
CD
SECTION
A
CD
SECTION
B
11
12
9
10
16
1
7
XTI
SCL
SCL
BU+3.3V
SDA
SDA
INTN
XTO
MPX
VDDA
VDDD
TELEPHONE MUTE
Q701
RDS POWER
CONTROL
Q50
9
15
X50
8.664MHz
R-CH
L
R
FRONT
AUDIO OUT
J451 (1/3)
L
R
BUS
IN
J451 (3/3)
AUX
SWITCH
Q351
17 AUX IN
14
3
2
• Signal Path
• R-CH is omitted due to same as L-CH.
: CD PLAY
: FM
: BUS
: MW/LW
(Page 17)
(Page 17)
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