Read Sony CDX-NC9950 Service Manual online
16
16
CDX-NC9950
CDX-NC9950
3-2. BLOCK DIAGRAM — MAIN SECTION —
1 ANT
40
SAIN
SOUND CONTROL,
ELECTRONIC VOLUME
IC301
J201
(ANTENNA)
TUX201
(TUNER UNIT)
I2C-BUS CONTROLLED
POWER AMP,
MULTIPLE VOLTAGE
REGULATOR
IC306
SYSTEM CONTROL
IC501 (2/3)
CN801
CN302
(NV-BUS)
41
SAOUT
R-CH (FRONT)
R-CH (REAR)
R-CH (REAR)
BATT
42 MDL
4 PDL+
5 PD-
7 PDR+
43 MDR
AML
AMR
4
3
3
10
VCC(TU+8.3V)
11
TU VDD(TU+5V)
15
E2P VDD(B/U+5V)
13
TU SCL
14
TU SDA
6
7
7
S-METER
9
RDS
16 MPX
16
TU MUTE
E2P SCL
17
E2P SDA
BATT
UNI SO
UNI SI
UNI CLK
ATT
LINK OFF
BU CHECK
BUS ON
SYS RST
RESET
42 VSM
VIN
V OUT
ON/OFF
23 TU MUTE
5 MOT+
3
6 MOT-
38 FP-IDET
4
9
7
1
6
OPEN/CLOSE
MOTOR
DRIVE
IC702
M601
(OPEN/CLOSE)
+9V REG
IC703
S601
(OPEN)
S602
(CLOSE)
8
5
5
MUTE CONDITION
QUALITY
55 MUTE CON
39 QUALITY(RDS)
39 QUALITY(RDS)
22 NSMASK
18 T.ROM SCK
17 T.ROM SDA
17 T.ROM SDA
89 OPEN SW
4 MOTOR ON
AUDIO+8.3V
TU+5V
BACK UP+5V
BACK UP+5V
L
R
CD-L
R-CH
14
16
R-CH
BUS GND
SWITCH
Q301
R-CH
L
R
17
24
OUTSW
OUTLR
25
OUTLF
5
3
3
FL RR+
FL RR–
RL RF+
RL RF–
9
7
7
29
27
27
35
SW1
R-CH
SW2
VP
BATT
30
37
37
AUDIO+B
BU+B
31
33
33
SERVO+3.3V
MECHA+6V
34
PANEL+B
TU+5V
22
21
21
OUTRF
OUTRR
8
MIX
15
MUTE
2 SDA
AUDIO+8.3V
BACKUP+5V
SERVO+3.3V
MECHA+6V
MECHA+6V
PANEL+9V
4 SCL
SDA
D304
SCL
22 STB
25 DIAG
AUDIO+8.3V
15
13
7
10
12
11
16
1
9
2
4
3
5
6
13
12
12
SCL
SDA
SACLK
SAOUT
ATT ON
SCL
SDA
SCL
SDA
SCL
SDA
31
I2C CKO
50
VOICE REQ
32
I2C SIO
28
VOL ATT
30
29
AMP ON
DIAG
51
BUIN
90
PARKING
12 IN-RR
FL+
FL–
RL+
RL–
FR+
FR–
RR+
RR–
AMP-REM
ANT-REM
ACC
PARKING
11 IN-RF
MUTE
Q307
MUTE
Q302
MUTE
Q304
DIGITAL
BOARD
MUTE DRIVE
Q306,308
60
SYS RST
59
BUS ON
58
UNICKO
56
UNISI
57
UNISO
10 BUIN
13 RESET
12 BUS ON
11 CLK IN
8 DATA OUT
9 DATA IN
3
BATT
4
CLK
6
DATA I/O
4
5
6
3
8
7
2
1
83
ACC IN
ACC CHECK
Q803
TU+5V REG
Q201
BACKUP+3.3V
BACKUP+5V
+3.3V REG
IC504
BATT
D607
D818
TH601
BATT
CN601
(BUS CONTROL IN)
ATT
86
TEL ATT
TEL ATT
Q805
R-CH
MIX
VOICE REQ
ACC OUT
R-CH
F901
L
R
AUDIO OUT
REAR
L
R
AUDIO OUT
FRONT
L
R
SUB
OUT
OUT
CD
SECTION
A
DISPLAY
SECTION
C
CD
SECTION
B
DISPLAY
SECTION
D
BATT
14
ILL
85
ILL IN
ILL CHECK
Q804
13
ACC OUT
52
AMUTE IN
OVER VOLTAGE
DETECT
Q603
BUS INTERFACE
IC601
RDS DEMODULATOR
IC201
1
BUS ON
2
RST
D608
BUS AUDIO IN
/AUX IN
BUS ON
SWITCH
Q602,605,606
NS MASK
SWITCH
Q202
5 OSCI
4 OSCO
VDDA
10
SCL
9
SDA
SCL
SDA
8
DAVN
TU+5V
14
VDDD
7
46 DAVN(RDS)
27 UNI AU
X201
4.332MHz
3
2
1
88 CLOSE SW
I-DET
IC701
EQ AMP
IC303
23
LROUT
24
LFOUT
5 LRIN+
2 LFIN+
IC505
ACC OUT
SWITCH
Q901
ACC MUTE
Q309
D609
D610
64
ATT
• Signal Path
• R-CH is omitted due to same as L-CH.
: CD PLAY
: FM
MW/LW
: BUS AUDIO/AUX
(Page 15)
(Page 17)
(Page 15)
(Page 17)
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