Block Diagram -Tuner Section - Sony CDX-L550 Service Manual

CDX-L550/L550V/L550X
3-3. BLOCK DIAGRAM — TUNER SECTION —
J10
(ANTENNA)
(Page 15)
A
TUNER UNIT
CD
TU10
CDL
SECTION
ANTFM MPX
2 10
1 ANTAM AM DET 8
BUFFER
Q10
IC20
NOISE
5 1
SUPPRESSOR
Q22
NOISE
SUPPRESSOR
ON
S-METER 14
I2C SDA
12
I2C SCL 13
9 10
RDS DECODER
SDA SCL
IC51
MULTI
LV IN
20 2
PATH
DET
MPX RDS/RDBS
RDS DET
9 16 8
DEM/DEC
OSCO OSCI
4 5
X51
4.332MHz
E2PROM SDA 17
E2PROM SCL 18
16
PJ401–1, –2 PJ401–3, –4
AUDIO OUT REAR AUDIO OUT FRONT
–1 –2 –3 –4
L R L R
ELECTRONIC VOLUME
IC401
OUT FL 28
43 MD LCH
12 MPXI OUT RL 27
Q451 Q431
9 AM
MUTE MUTE
LEVEL
13
14 MPIN
19 SDA
20 SCL
MUTE
17 EXA ATT
CONT
Q478,479
SYSTEM CONTROL
IC501 (2/3)
69
ATT
70 VOL ATT BEEP 35
AMP ON 67
7 QUALITY
66
AMP ATT
TEL ATT 40
ACC
90 NS MASK
ACC IN 38 CHECK
Q631
37
TEST IN
POWER SUPPLY
VSM
2
IC601
45 I2C SIO
47 I2C CKO 7 VCC AMP +B
BATT
2 8.7V ON ANT +B
49 3 5.6V ON
TUN ON
BU+B
8 MPTH PW ON 4 STB COM 8V
50
TU 5.6V
TU 8.7V
27 DAVN
BATT DET
Q556
BATT DET
86 E2P SIO BU IN 28
Q551,557
87 E2P CKO
16
POWER AMP
IC404
CNP601
5 1 FL+
12
9 FL–
3
2
9 RL+
11
7 10 RL–
16 AUX
4 FR+
12
4 STBY FR–
22 MUTE R-CH
3 RR+
11 RR–
BATT 16 BATT
F901
TEL
13 ATT
ATT
Q651
7 ACC
15 TEST
6 5 AMP R
8 6 ANT R
5
BU 5V
9 COM 8V
10 TU 5.6V
11 TU 8.7V
• Signal path
:FM
BATT
:MW
BATT
:CD