22
22
J1
(ANTENNA)
2
10
1
ANTFM
MPX
CDL
8
AM DET
19
IF AM
14
S-METER
12
I2C SDA
13
I2C SCL
9
RDS DET
4
FM AGC
17
E2PROM SDA
18
E2PROM SCL
ANTAM
TUNER UNIT
TU1
BUFFER
Q1
MUTE
CONT
Q131
NOISE
DET
5
1
IC90
Q90
NOISE ON
Q111
MUTE
Q121
MUTE
56
50
32
53
70
71
57
12
14
15
20
21
18
11
13
1
30
SYSTEM CONTROL
IC501 (2/3)
ELECTRONIC VOLUME
IC151
OUT LF
29
OUT LR
16
BEEP
59
AMP ON
60
AMP MUTE
79
TEL ATT
82
ACC IN
SEL
MPX
AM
AM IF
LEVEL
MPIN
SDA
SCL
SM
VOL ATT
TUN ATT
QUALITY
NS MASK
VSM
I2C SIO
I2C CKO
MPTH
DAVN
FM AGC
E2P SIO
E2P CKO
R-CH
–1
L
–2
R
AUDIO OUT REAR
CD
SECTION
A
MUTE
CONT
Q621, 622
Q181
MUTE
Q171
MUTE
CNJ151
ATT
CD
SECTION
B
22 MUTE
4 STAND BY
16 AUX IN
11
12
5
3
9
8
POWER AMP
IC611
1
9
2
10
CN601
FL+
FL–
RL+
RL–
4
12
FR+
FR–
3
11
RR+
RR–
16 BATT
13 ATT
5 AMP R
6 ANT R
R-CH
BATT
F901
4000R/4000RX
TEL
ATT
Q571
7 ACC
15 TEST
1
TU ON
81
TEST IN
ACC
CHECK
Q661
POWER SUPPLY
IC671
3
120
PW ON
4
2
7
6
BATT
VCC
AMP +B
8
ANT +B
9
COM 8V
10
TU 5.6V
11
TU 8.7V
COM 8V
5
BU +B
BU 5V
TU 5.6V
TU 8.7V
8.7V ON
5.6V ON
STB
9
20
2
10
MULTI
PATH
DET
LV IN
16
4
5
8
RDS/RDBS
DEM/DEC
52
64
51
MPX
OSCO
OSCI
SDA
SCA
X51
4.332MHz
04
10
9
RDS DECODER
IC51
• Signal path
:FM
:MW
:CD
3-3. BLOCK DIAGRAM — TUNER SECTION —
CDX-3900R/4000R/4000RX
(Page 21)
(Page 21)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
