14pin BUS-CN
J900
J901
20pin POWER SUPPLY-CN
POWER AMP
IC90
BU DET
ACC DET
P-ANT
H-REMOTE
H-MUTE
IC52
E-VOL
IC21
RST
BUS
IC30
SYS ACC
B.U. 5V
A 8V
IC20
PROTECTION
THERMAL
PON 5V
ILL DET
KEY-B
LCD
EEP ROM
IC10
LED
DRIVER
SYSTEM u-COM
IC11
(CX-402 only)
SRV 8V
IC20
AM
IC41
TUNER PACK
A400
PLL
IC40
AM+B
FM+B
LPF
ANT
J400
KEY ILLMI
LCD BACK LIGHT
LED IND
LCD DRIVER
KEY MATRIX
VOL
LCD
(F/E,IF,NC,MPX)
INTER FACE
+B
BACK LIGHT
NOISE
CANCELER
ILL
BUS+
BUS-
SYS
Rch-
Rch+
Lch+
Lch-
ACC
P-ANT
H-MUTE
H-REMO
RL-
RR+
RR-
RL+
FR-
FR+
FL+
FL-
B.U.
ILL
FL
IN
RL
IN
RR IN
FR IN
MUTE
STBY
FL-
FL+
FR+
FR-
RL-
RL+
RR+
RR-
BEEP
B.U. 13.2V
BUS
CD
FM
AM
B.U. 5V
SYS ON
BUS DO
BUS DI
PON A
PON D
ILL DET
KEY ILL
LCD BL
LED IND
RESET
H.P
H MUTE
HANDLE
P
ANT
ACC DET
BU DET
DI
CE
CL
B.U. 5V
B.U. 13.2V
B.U. 13.2V
B.U. 13.2V
B.U. 13.2V
DI
CLK
CE
DO
X100
32.678kHz
X101
6.29MHz
ENC UP
ENC DOWN
ACC
A 8V
SDA
SCL
B.U. 5V
CE
CLK
D
ATA
B.U. 13.2V
PON 5V
A 5
V
A 8
V
A 8
V
FM+B
AM+B
FM OSC
AM OSC
AGC
VT
FM ANT
AM ANT
AM AF
AM IF
FM L
FM R
FM S-METER
AM S-METER
FM SD
ST IND
AM SD
AM+B
B.U. 5V
PON 5V
SW2
SW3
SW1
LO/EJ
MOTOR
M STOP
MUTE L
MUTE R
M RST
CLK
MECHA
DATA
Lch
Rch
B.U. 5V
A 8V
SRV 8V
B.U. 5V
DI
CLK
CE
DO
KS3
KS4
KS5
KS6
KI1
KS2
KS4
KI3
X2
X1
XT2
XT1
SYNTHESIZER UNIT
(X14- ) (A/2)
CD MECHA. (ME1)
SYNTHESIZER UNIT
(X14- ) (B/2)
CX-402/420 (M/J)
CX-424 (J)
AM
FM
CD
CD(BUS)
(VOL.MAX)
: 3300mV
: 500mV
: 390mV
: 3200mV
360mV
44mV
60mV
350mV
CX-402A/402R/402W
2
BLOCK DIAGRAM
